diff --git a/Source/Apps/Test/ps2info/ps2info.asm b/Source/Apps/Test/ps2info/ps2info.asm
index 8a517a22..092d8706 100644
--- a/Source/Apps/Test/ps2info/ps2info.asm
+++ b/Source/Apps/Test/ps2info/ps2info.asm
@@ -6,12 +6,20 @@
 ; Simple utility that performs simple tests of an 8242 PS/2 controller,
 ; keyboard, and mouse.
 ;
+; WBW 2022-03-28: Add menu driven port selection
+;                 Add support for RHYOPHYRE
+; WBW 2022-04-01: Add menu for test functions
+;
 ;=======================================================================
 ;
 ; PS/2 Keyboard/Mouse controller port addresses (adjust as needed)
 ;
-iocmd	.equ	$E3	; PS/2 controller command port address
-iodat	.equ	$E2	; PS/2 controller data port address
+; MBC:
+iocmd_mbc	.equ	$E3	; PS/2 controller command port address
+iodat_mbc	.equ	$E2	; PS/2 controller data port address
+; RPH:
+iocmd_rph	.equ	$8D	; PS/2 controller command port address
+iodat_rph	.equ	$8C	; PS/2 controller data port address
 ;
 cpumhz	.equ	8	; for time delay calculations (not critical)
 ;
@@ -37,6 +45,8 @@ bdos	.equ	$0005			; BDOS invocation vector
 	call	crlf
 	ld	de,str_banner		; banner
 	call	prtstr
+;
+	call	setup
 ;
 	call	main			; do the real work
 ;
@@ -50,52 +60,95 @@ exit:
 	ld	sp,(stksav)		; restore stack
 	jp	restart			; return to CP/M via restart
 ;
-;
 ;=======================================================================
-; Main Program
+; Select and setup for hardware
 ;=======================================================================
 ;
-main:
-;
-; Display active controller port addresses
-;
+setup:
+	call	crlf2
+	ld	de,str_hwmenu
+	call	prtstr
+setup1:
+	ld	c,$06			; BDOS direct console I/O
+	ld	e,$FF			; Subfunction = read
+	call	bdos
+	cp	0
+	jr	z,setup1
+	call	upcase
+	call	prtchr
+	cp	'1'			; MBC
+	jr	z,setup_mbc
+	cp	'2'			; RHYOPHYRE
+	jr	z,setup_rph
+	cp	'X'
+	jr	z,exit
+	jr	setup
+;
+setup_mbc:
+	ld	a,iocmd_mbc
+	ld	(iocmd),a
+	ld	a,iodat_mbc
+	ld	(iodat),a
+	ld	de,str_mbc
+	jr	setup2
+;
+setup_rph:
+	ld	a,iocmd_rph
+	ld	(iocmd),a
+	ld	a,iodat_rph
+	ld	(iodat),a
+	ld	de,str_rph
+	jr	setup2
+;
+setup2:
+	call	prtstr
 	call	crlf2
 	ld	de,str_cmdport
 	call	prtstr
-	ld	a,iocmd
+	;ld	a,iocmd
+	ld	a,(iocmd)
 	call	prthex
 	call	crlf
 	ld	de,str_dataport
 	call	prtstr
-	ld	a,iodat
+	;ld	a,iodat
+	ld	a,(iodat)
 	call	prthex
 ;
-	call	test_ctlr
-	jr	z,main0			; continue if ctlr OK
-	ld	de,str_kbd_failed
-	call	crlf2
-	call	prtstr
-	jr	mainz			; bail out if ctlr fails
+	xor	a
+	ret
 ;
-main0:
-	call	test_kbd
-	jr	z,main1			; completed all tests, continue
-	ld	de,str_kbd_failed
-	call	crlf2
-	call	prtstr
+;=======================================================================
+; Main Program
+;=======================================================================
 ;
-main1:
-	call	test_mse
-	jr	z,main2			; completed all tests, continue
-	ld	de,str_mse_failed
+main:
 	call	crlf2
+	ld	de,str_menu
 	call	prtstr
+main1:
+	ld	c,$06			; BDOS direct console I/O
+	ld	e,$FF			; Subfunction = read
+	call	bdos
+	cp	0
+	jr	z,main1
+	call	upcase
+	call	prtchr
+	cp	'X'
+	jp	z,exit
+	call	main2
+	jr	main
 ;
 main2:
-	call	test_kbdmse
-;
-mainz:
-	xor	a
+	; Dispatch to test functions
+	cp	'C'			; Test Controller
+	jp	z,test_ctlr
+	cp	'K'			; Test Keyboard
+	jp	z,test_kbd
+	cp	'M'			; Test Mouse
+	jp	z,test_mse
+	cp	'B'			; Test Both
+	jp	z,test_kbdmse
 	ret
 ;
 ; Test 8242 PS/2 Controller
@@ -109,10 +162,8 @@ test_ctlr:
 	ret	nz
 ;
 	call	ctlr_test_p1
-	;ret	nz
 ;
 	call	ctlr_test_p2
-	;ret	nz
 ;
 	ret
 ;
@@ -123,13 +174,15 @@ test_kbd:
 ; First, we attempt to contact the controller and keyboard, then
 ; print the keyboard identity and scan codes supported
 ;
-	; Run test series with translation off
 	call	crlf2
 	ld	de,str_basic
 	call	prtstr
+;
+	call	ctlr_test
+	jr	nz,test_kbd_fail
 ;
 	call	test_kbd_basic
-	ret	nz
+	jr	nz,test_kbd_fail
 ;
 ; We make two passes through the test series with different controller
 ; setup values.  The first time is with scan code translation off and
@@ -155,59 +208,83 @@ test_kbd:
 ;
 	ret
 ;
+test_kbd_fail:
+	ld	de,str_kbd_failed
+	call	crlf2
+	call	prtstr
+	ret
+;
 ; Test Mouse
 ;
 test_mse:
 	call	crlf2
 	ld	de,str_basic_mse
 	call	prtstr
+;
+	call	ctlr_test
+	jr	nz,test_mse_fail
 ;
 	ld	a,$10			; kbd disabled, mse enabled, no ints
 	call	ctlr_setup
-	ret	nz
+	jr	nz,test_mse_fail
 ;
 	call	mse_reset
-	ret	nz
+	jr	nz,test_mse_fail
 ;
 	call	mse_ident
-	ret	nz
+	jr	nz,test_mse_fail
 ;
 	call	mse_stream
-	ret	nz
+	jr	nz,test_mse_fail
 ;
 	call	mse_echo
 ;	
 	xor	a			; signal success
 	ret
 ;
+test_mse_fail:
+	ld	de,str_mse_failed
+	call	crlf2
+	call	prtstr
+	ret
+;
 ; Test Everything
 ;
 test_kbdmse:
 	call	crlf2
 	ld	de,str_kbdmse
 	call	prtstr
+;
+	call	ctlr_test
+	jr	nz,test_kbdmse_fail
 ;
 	ld	a,$00			; kbd enabled, mse enabled, no ints
 	call	ctlr_setup
-	ret	nz
+	jr	nz,test_kbdmse_fail
 ;
 	call	kbd_reset
-	ret	nz
+	jr	nz,test_kbdmse_fail
 ;
 	ld	a,2
 	call	kbd_setsc
 ;
 	call	mse_reset
-	ret	nz
+	jr	nz,test_kbdmse_fail
 ;
 	call	mse_stream
-	ret	nz
+	jr	nz,test_kbdmse_fail
 ;
 	call	kbdmse_echo
 ;	
 	xor	a			; signal success
 	ret
 ;
+test_kbdmse_fail:
+	ld	de,str_kbdmse_failed
+	call	crlf2
+	call	prtstr
+	ret
+;
 ; Perform basic keyboard tests, display keyboard identity, and
 ; inventory the supported scan code sets.
 ;
@@ -782,7 +859,9 @@ wait_write:
 	ld	a,(timeout)		; setup timeout constant
 	ld	b,a
 wait_write1:
-	in	a,(iocmd)		; get status
+	ld	a,(iocmd)		; cmd port
+	ld	c,a			; ... to C
+	in	a,(c)			; get status
 	ld	c,a			; save status
 	and	$02			; isolate input buf status bit
 	ret	z			; 0 means ready, all done
@@ -804,7 +883,9 @@ wait_read:
 	ld	a,(timeout)		; setup timeout constant
 	ld	b,a
 wait_read1:
-	in	a,(iocmd)		; get status
+	ld	a,(iocmd)		; cmd port
+	ld	c,a			; ... to C
+	in	a,(c)			; get status
 	ld	c,a			; save status
 	and	$01			; isolate input buf status bit
 	xor	$01			; invert so 0 means ready
@@ -824,7 +905,9 @@ check_read:
 ; Check for data ready to read
 ;   A=0 indicates data available (ZF set)
 ;
-	in	a,(iocmd)		; get status
+	ld	a,(iocmd)		; cmd port
+	ld	c,a			; ... to C
+	in	a,(c)			; get status
 	and	$01			; isolate input buf status bit
 	xor	$01			; invert so 0 means ready
 	ret
@@ -834,7 +917,9 @@ check_read_kbd:
 ; Check for keyboard data ready to read
 ;   A=0 indicates data available (ZF set)
 ;
-	in	a,(iocmd)		; get status
+	ld	a,(iocmd)		; cmd port
+	ld	c,a			; ... to C
+	in	a,(c)			; get status
 	and	%00100001		; isolate input buf status bit
 	cp	%00000001		; data ready, not mouse
 	ret
@@ -844,7 +929,9 @@ check_read_mse:
 ; Check for mouse data ready to read
 ;   A=0 indicates data available (ZF set)
 ;
-	in	a,(iocmd)		; get status
+	ld	a,(iocmd)		; cmd port
+	ld	c,a			; ... to C
+	in	a,(c)			; get status
 	and	%00100001		; isolate input buf status bit
 	cp	%00100001		; data ready, is mouse
 	ret
@@ -860,8 +947,10 @@ put_cmd:
 	scf				; else, signal timeout error
 	ret				; and bail out
 put_cmd1:
+	ld	a,(iocmd)		; cmd port
+	ld	c,a			; ... to C
 	ld	a,e			; recover value to write
-	out	(iocmd),a		; write it
+	out	(c),a			; write it
 	or	a			; clear CF for success
 	ret
 ;
@@ -889,8 +978,10 @@ put_data:
 	scf				; else, signal timeout error
 	ret				; and bail out
 put_data1:
+	ld	a,(iodat)		; data port
+	ld	c,a			; ... to C
 	ld	a,e			; recover value to write
-	out	(iodat),a		; write it
+	out	(c),a			; write it
 	or	a			; clear CF for success
 	ret
 ;
@@ -947,7 +1038,9 @@ get_data:
 	scf				; else signal timeout error
 	ret				; and bail out
 get_data1:
-	in	a,(iodat)		; get data byte
+	ld	a,(iodat)		; data port
+	ld	c,a			; ... to C
+	in	a,(c)			; get data byte
 	or	a			; clear CF for success
 	ret
 ;
@@ -1020,7 +1113,6 @@ err_ret:
 ; Utility Routines
 ;=======================================================================
 ;
-;
 ; Print character in A without destroying any registers
 ;
 prtchr:
@@ -1044,6 +1136,16 @@ prtdot:
 	pop	af		; restore af
 	ret			; done
 ;
+; Uppercase character in A
+;
+upcase:
+	cp	'a'			; below 'a'?
+	ret	c			; if so, nothing to do
+	cp	'z'+1			; above 'z'?
+	ret	nc			; if so, nothing to do
+	and	~$20			; convert character to lower
+	ret				; done
+;
 ; Print a zero terminated string at (de) without destroying any registers
 ;
 prtstr:
@@ -1239,7 +1341,21 @@ delay1:
 ; Constants
 ;=======================================================================
 ;
-str_banner		.db	"PS/2 Keyboard/Mouse Information v0.4, 7-Jan-2022",0
+str_banner		.db	"PS/2 Keyboard/Mouse Information v0.6, 1-Apr-2022",0
+str_hwmenu		.db	"PS/2 Controller Port Options:\r\n\r\n"
+			.db	"  1 - MBC\r\n"
+			.db	"  2 - RHYOPHYRE\r\n"
+			.db	"  X - Exit Application\r\n"
+			.db	"\r\nSelection? ",0
+str_mbc			.db	"MBC",0
+str_rph			.db	"RHYOPHYRE",0
+str_menu		.db	"PS/2 Testing Options:\r\n\r\n"
+			.db	"  C - Test PS/2 Controller\r\n"
+			.db	"  K - Test PS/2 Keyboard\r\n"
+			.db	"  M - Test PS/2 Mouse\r\n"
+			.db	"  B - Test Both PS/2 Keyboard and Mouse Together\r\n"
+			.db	"  X - Exit Application\r\n"
+			.db	"\r\nSelection? ",0
 str_exit		.db	"Done, Thank you for using PS/2 Keyboard/Mouse Information!",0
 str_cmdport		.db	"Controller Command Port: ",0
 str_dataport		.db	"Controller Data Port: ",0
@@ -1312,6 +1428,11 @@ str_mse_failed		.db	"***** MOUSE HARDWARE ERROR *****",13,10,13,10
 			.db	"the completion of the full set of mouse tests.",13,10
 			.db	"Check your hardware and verify the port",13,10
 			.db	"addresses being used for the controller",0
+str_kbdmse_failed	.db	"***** KEYBOARD/MOUSE HARDWARE ERROR *****",13,10,13,10
+			.db	"A basic hardware or configuration issue prevented",13,10
+			.db	"the completion of the full set of keyboard/mouse tests.",13,10
+			.db	"Check your hardware and verify the port",13,10
+			.db	"addresses being used for the controller",0
 ;
 ;=======================================================================
 ; Working data
@@ -1321,6 +1442,9 @@ stksav		.dw	0		; stack pointer saved at start
 		.fill	stksiz,0	; stack
 stack		.equ	$		; stack top
 ;
+iocmd		.db	0
+iodat		.db	0
+;
 workbuf		.fill	8
 workbuf_len	.db	0
 ;
diff --git a/Source/Apps/rtc.asm b/Source/Apps/rtc.asm
index 5a4ebeb5..915cf037 100644
--- a/Source/Apps/rtc.asm
+++ b/Source/Apps/rtc.asm
@@ -29,6 +29,8 @@
 ;
 ;[2021/07/10] v1.7 Support MBC (AJL)
 ;
+;[2022/03/27] v1.8 Support RHYOPHYRE
+;
 ; Constants
 ;
 mask_data	.EQU	%10000000	; RTC data line
@@ -46,6 +48,7 @@ PORT_SCZ180	.EQU	$0C		; RTC port for SCZ180
 PORT_DYNO	.EQU	$0C		; RTC port for DYNO
 PORT_RCZ280	.EQU	$C0		; RTC port for RCZ280
 PORT_MBC	.EQU	$70		; RTC port for MBC
+PORT_RPH	.EQU	$84		; RTC port for RHYOPHYRE
 
 
 BDOS		.EQU	5		; BDOS invocation vector
@@ -1126,6 +1129,11 @@ HINIT:
 	LD	DE,PLT_MBC
 	CP	13		; MBC
 	JR	Z,RTC_INIT2
+;
+	LD	C,PORT_RPH
+	LD	DE,PLT_RPH
+	CP	14		; RHYOPHYRE
+	JR	Z,RTC_INIT2
 ;
 	; Unknown platform
 	LD	DE,PLTERR	; BIOS error message
@@ -1622,7 +1630,7 @@ TESTING_BIT_DELAY_OVER:
 
 RTC_HELP_MSG:
 	.DB	0Ah, 0Dh		; line feed and carriage return
-	.TEXT	"RTC: Version 1.7"
+	.TEXT	"RTC: Version 1.8"
 	.DB	0Ah, 0Dh		; line feed and carriage return
 	.TEXT	"Commands: E)xit T)ime st(A)rt S)et R)aw L)oop C)harge N)ocharge D)elay I)nit G)et P)ut B)oot W)arm-start H)elp"
 	.DB	0Ah, 0Dh		; line feed and carriage return
@@ -1751,6 +1759,7 @@ PLT_SCZ180	.TEXT	", SC Z180 RTC Module Latch Port 0x0C\r\n$"
 PLT_DYNO	.TEXT	", DYNO RTC Module Latch Port 0x0C\r\n$"
 PLT_RCZ280	.TEXT	", RC2014 Z280 RTC Module Latch Port 0xC0\r\n$"
 PLT_MBC		.TEXT	", MBC RTC Latch Port 0x70\r\n$"
+PLT_RPH		.TEXT	", RHYOPHYRE RTC Latch Port 0x84\r\n$"
 
 ;
 ; Generic FOR-NEXT loop algorithm
diff --git a/Source/HBIOS/Build.cmd b/Source/HBIOS/Build.cmd
index 04dad21d..4dc90995 100644
--- a/Source/HBIOS/Build.cmd
+++ b/Source/HBIOS/Build.cmd
@@ -211,5 +211,6 @@ call Build EZZ80 std 512 || exit /b
 call Build EZZ80 tz80 512 || exit /b
 call Build DYNO std 512 || exit /b
 call Build UNA std 512 || exit /b
+call Build RPH std 512 || exit /b
 
 goto :eof
diff --git a/Source/HBIOS/Build.ps1 b/Source/HBIOS/Build.ps1
index a5606716..21689463 100644
--- a/Source/HBIOS/Build.ps1
+++ b/Source/HBIOS/Build.ps1
@@ -28,7 +28,7 @@ $ErrorAction = 'Stop'
 #
 
 $PlatformListZ80 = "SBC", "MBC", "ZETA", "ZETA2", "RCZ80", "EZZ80", "UNA"
-$PlatformListZ180 = "N8", "MK4", "RCZ180", "SCZ180", "DYNO"
+$PlatformListZ180 = "N8", "MK4", "RCZ180", "SCZ180", "DYNO", "RPH"
 $PlatformListZ280 = "RCZ280"
 
 #
diff --git a/Source/HBIOS/Build.sh b/Source/HBIOS/Build.sh
index 818b45fa..202fbae2 100755
--- a/Source/HBIOS/Build.sh
+++ b/Source/HBIOS/Build.sh
@@ -27,6 +27,7 @@ if [ "${ROM_PLATFORM}" == "dist" ] ; then
 	ROM_PLATFORM="RCZ80"; ROM_CONFIG="skz"; ROMSIZE="512"; bash Build.sh
 	ROM_PLATFORM="RCZ80"; ROM_CONFIG="zrc"; ROMSIZE="512"; bash Build.sh
 	ROM_PLATFORM="RCZ80"; ROM_CONFIG="zrc_ram"; ROMSIZE="0"; bash Build.sh
+	ROM_PLATFORM="RPH"; ROM_CONFIG="std"; ROMSIZE="512"; bash Build.sh
 	ROM_PLATFORM="SBC"; ROM_CONFIG="std"; ROMSIZE="512"; bash Build.sh
 	ROM_PLATFORM="SBC"; ROM_CONFIG="simh"; ROMSIZE="512"; bash Build.sh
 	ROM_PLATFORM="MBC"; ROM_CONFIG="std"; ROMSIZE="512"; bash Build.sh
diff --git a/Source/HBIOS/Config/MBC_ddw.asm b/Source/HBIOS/Config/RPH_std.asm
similarity index 56%
rename from Source/HBIOS/Config/MBC_ddw.asm
rename to Source/HBIOS/Config/RPH_std.asm
index 9a628d19..8a3d4b22 100644
--- a/Source/HBIOS/Config/MBC_ddw.asm
+++ b/Source/HBIOS/Config/RPH_std.asm
@@ -1,6 +1,6 @@
 ;
 ;==================================================================================================
-;   MBC CONFIGURATION
+;   RHYOPHYRE STANDARD CONFIGURATION
 ;==================================================================================================
 ;
 ; THE COMPLETE SET OF DEFAULT CONFIGURATION SETTINGS FOR THIS PLATFORM ARE FOUND IN THE
@@ -22,35 +22,20 @@
 ; PLEASE REFER TO THE CUSTOM BUILD INSTRUCTIONS (README.TXT) IN THE SOURCE DIRECTORY (TWO
 ; DIRECTORIES ABOVE THIS ONE).
 ;
-#DEFINE PLATFORM_NAME "Multi Board Computer"
 #DEFINE	BOOT_DEFAULT	"H"		; DEFAULT BOOT LOADER CMD ON <CR> OR AUTO BOOT
 ;
-#include "cfg_mbc.asm"
-;
-CPUOSC		.EQU	4000000		; CPU OSC FREQ IN MHZ
-;
-BATCOND		.SET	FALSE
-;
-PPIDEENABLE	.SET	TRUE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM)
-;
-DSKYENABLE	.SET	TRUE		; ENABLES DSKY
-DSKYMODE	.SET	DSKYMODE_NG	; DSKY VERTSION: DSKYMODE_[V1|NG]
-DSKYOSC         .SET    100000
-;
-FDENABLE	.EQU	TRUE		; FD: ENABLE FLOPPY DISK DRIVER (FD.ASM)
-
-;DIAGLVL		.EQU	DL_VERBOSE
-
-DMAENABLE	.EQU	TRUE		; DMA: ENABLE DMA DRIVER (DMA.ASM)
-DMABASE		.EQU	$E0		; DMA: DMA BASE ADDRESS
-DMAMODE		.EQU	DMAMODE_MBC	; DMA: DMA MODE (NONE|ECB|Z180|Z280|RC|MBC)
-
-CVDUMODE .EQU CVDUMODE_MBC ; CVDU: CVDU MODE: CVDUMODE_[NONE|ECB|MBC]
-CVDUMON .EQU CVDUMON_CGA ; CVDU: CVDU MONITOR SETUP: CVDUMON_[NONE|CGA|EGA]
-
-INTMODE         .SET    2
-CTCENABLE       .SET    TRUE            ; ENABLE ZILOG CTC SUPPORT
-
-AY38910ENABLE	.EQU	TRUE		; AY: AY-3-8910 / YM2149 SOUND DRIVER
-AY_CLK		.EQU	CPUOSC / 2	; DEFAULT TO CPUOSC / 4
-AYMODE		.EQU	AYMODE_MBC	; AY: DRIVER MODE: AYMODE_[SCG|N8|RCZ80|RCZ180|MSX|LINC]
\ No newline at end of file
+#include "cfg_rph.asm"
+;
+CPUOSC		.SET	18432000	; CPU OSC FREQ IN MHZ
+;
+INTMODE		.SET	0		; INTERRUPTS: 0=NONE, 1=MODE 1, 2=MODE 2, 3=MODE 3 (Z280)
+;
+Z180_CLKDIV	.SET	1		; Z180: CHK DIV: 0=OSC/2, 1=OSC, 2=OSC*2
+Z180_MEMWAIT	.SET	0		; Z180: MEMORY WAIT STATES (0-3)
+Z180_IOWAIT	.SET	1		; Z180: I/O WAIT STATES TO ADD ABOVE 1 W/S BUILT-IN (0-3)
+;
+RAMSIZE		.SET	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
+;
+CRTACT		.SET	FALSE		; ACTIVATE CRT (VDU,CVDU,PROPIO,ETC) AT STARTUP
+;
+PPIDEENABLE	.SET	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM)
diff --git a/Source/HBIOS/Makefile b/Source/HBIOS/Makefile
index 371f24d2..2fff3b8f 100644
--- a/Source/HBIOS/Makefile
+++ b/Source/HBIOS/Makefile
@@ -12,7 +12,7 @@ include $(TOOLS)/Makefile.inc
 
 FONTS := font8x11c.asm font8x11u.asm font8x16c.asm font8x16u.asm font8x8c.asm font8x8u.asm fontcgac.asm fontcgau.asm
 
-ifneq ($(findstring $(ROM_PLATFORM), N8 MK4 RCZ180 SCZ180 DYNO),)
+ifneq ($(findstring $(ROM_PLATFORM), N8 MK4 RCZ180 SCZ180 DYNO RPH),)
 	TASM=$(BINDIR)/uz80as -t hd64180
 endif
 
diff --git a/Source/HBIOS/asci.asm b/Source/HBIOS/asci.asm
index ec0a9763..2d118f7b 100644
--- a/Source/HBIOS/asci.asm
+++ b/Source/HBIOS/asci.asm
@@ -75,10 +75,14 @@ ASCI1_BASE	.EQU	Z180_BASE + 1	; RELATIVE TO Z180 INTERNAL IO PORTS
 ;
 ASCI_RTS	.EQU	%00010000	; ~RTS BIT OF CNTLA REG
 ;
-#IF (INTMODE == 2)
+#IF (ASCIINTS)
+;
+  #IF (INTMODE == 2)
 ;
 ASCI0_IVT	.EQU	IVT(INT_SER0)
 ASCI1_IVT	.EQU	IVT(INT_SER1)
+;
+  #ENDIF
 ;
 #ENDIF
 ;
@@ -115,25 +119,29 @@ ASCI_PREINIT2:
 	ADD	IY,DE			; BUMP IY TO NEXT ENTRY
 	DJNZ	ASCI_PREINIT0		; LOOP UNTIL DONE
 ;
-#IF (INTMODE >= 1)
+#IF (ASCIINTS)
+;
+  #IF (INTMODE >= 1)
 	; SETUP INT VECTORS AS APPROPRIATE
 	LD	A,(ASCI_DEV)		; GET DEVICE COUNT
 	OR	A			; SET FLAGS
 	JR	Z,ASCI_PREINIT3		; IF ZERO, NO ASCI DEVICES, ABORT
 ;
-#IF (INTMODE == 1)
+    #IF (INTMODE == 1)
 	; ADD IM1 INT CALL LIST ENTRY
 	LD	HL,ASCI_INT		; GET INT VECTOR
 	CALL	HB_ADDIM1		; ADD TO IM1 CALL LIST
-#ENDIF
+    #ENDIF
 ;
-#IF (INTMODE == 2)
+    #IF (INTMODE == 2)
 	; SETUP IM2 VECTORS
 	LD	HL,ASCI_INT0
 	LD	(ASCI0_IVT),HL		; IVT INDEX
 	LD	HL,ASCI_INT1
 	LD	(ASCI1_IVT),HL		; IVT INDEX
-#ENDIF
+    #ENDIF
+;
+  #ENDIF
 ;
 #ENDIF
 ;
@@ -188,7 +196,9 @@ ASCI_INIT1:
 ;
 ; RECEIVE INTERRUPT HANDLER
 ;
-#IF (INTMODE > 0)
+#IF (ASCIINTS)
+;
+  #IF (INTMODE > 0)
 ;
 ; IM1 ENTRY POINT
 ;
@@ -232,10 +242,10 @@ ASCI_INTRCV1:
 	ADD	A,8			; BUMP TO RDR PORT
 	LD	C,A			; PUT IN C, B IS STILL ZERO
 	IN	A,(C)			; READ PORT
-  #IF (ASCIBOOT != 0)
+    #IF (ASCIBOOT != 0)
 	CP	ASCIBOOT		; REBOOT REQUEST?
 	JP	Z,SYS_RESCOLD		; IF SO, DO IT, NO RETURN
-  #ENDIF
+    #ENDIF
 	LD	B,A			; SAVE BYTE READ
 	LD	L,(IY+6)		; SET HL TO
 	LD	H,(IY+7)		; ... START OF BUFFER STRUCT
@@ -292,6 +302,8 @@ ASCI_INTRCV3:
 ASCI_INTRCV4:
 	OR	$FF			; NZ SET TO INDICATE INT HANDLED
 	RET				; AND RETURN
+;
+  #ENDIF
 ;
 #ENDIF
 ;
@@ -309,7 +321,7 @@ ASCI_FNTBL:
 	.ECHO	"*** INVALID ASCI FUNCTION TABLE ***\n"
 #ENDIF
 ;
-#IF (INTMODE == 0)
+#IF ((!ASCIINTS) | (INTMODE == 0))
 ;
 ASCI_IN:
 	CALL	ASCI_IST		; CHECK FOR CHAR READY
@@ -395,7 +407,7 @@ ASCI_OUT:
 ;
 ;
 ;
-#IF (INTMODE == 0)
+#IF ((!ASCIINTS) | (INTMODE == 0))
 ;
 ASCI_IST:
 	CALL	ASCI_ICHK		; ASCI INPUT CHECK
@@ -522,7 +534,7 @@ ASCI_INITGO:
 	OUT	(C),L			; WRITE CNTLB VALUE
 	INC	C			; BUMP TO
 	INC	C			; ... STAT REG, B IS STILL 0
-#IF (INTMODE > 0)
+#IF ((ASCIINTS) & (INTMODE > 0))
 	LD	A,$08			; SET RIE BIT ON
 #ELSE
 	XOR	A			; CLEAR RIE/TIE
@@ -534,7 +546,7 @@ ASCI_INITGO:
 	LD	A,$66			; STATIC VALUE FOR ASEXT
 	OUT	(C),A			; WRITE ASEXT REG
 ;
-#IF (INTMODE > 0)
+#IF ((ASCIINTS) & (INTMODE > 0))
 ;
 	; RESET THE RECEIVE BUFFER
 	LD	E,(IY+6)
@@ -609,6 +621,24 @@ ASCI_DETECT:
 ; DUE TO ENCODING BAUD IS ALWAYS DIVISIBLE BY 75
 ; Z180 DIVISOR IS ALWAYS A FACTOR OF 160
 ;
+; CNTLB=	XXPXDSSS
+; FAILSAVE = 	00100000
+;
+; PS (PRESCALE): 0=/10, 1=/30
+; DR (DIVIDE RATIO): 0=/16, 1=/64
+; SS2	SS1	SS0
+; ---	---	---
+; 0	0	0	/1
+; 0	0	1	/2
+; 0	1	0	/4
+; 0	1	1	/8
+; 1	0	0	/16
+; 1	0	1	/32
+; 1	1	0	/64
+;
+; FAILSAFE: CLOCK / 30 / 16 / 1 = CLOCK / 480
+;	IF CLOCK=18432000, BAUD=38400
+;
 ; X := CPU_HZ / 160 / 75 ==> SIMPLIFIED ==> X := CPU_KHZ / 12
 ; X := X / (BAUD / 75)
 ; IF X % 3 == 0, THEN (PS := 1, X := X / 3) ELSE PS=0
@@ -769,7 +799,7 @@ ASCI_STR_ASCIB	.DB	"ASCI W/BRG$"
 ;
 ASCI_DEV	.DB	0		; DEVICE NUM USED DURING INIT
 ;
-#IF (INTMODE == 0)
+#IF ((!ASCIINTS) | (INTMODE == 0))
 ;
 ASCI0_RCVBUF	.EQU	0
 ASCI1_RCVBUF	.EQU	0
diff --git a/Source/HBIOS/cfg_dyno.asm b/Source/HBIOS/cfg_dyno.asm
index fb1d0e36..d9421fea 100644
--- a/Source/HBIOS/cfg_dyno.asm
+++ b/Source/HBIOS/cfg_dyno.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_DYNO	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_DYNO	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z180	; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 RAMLOC		.EQU	19		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
 RAMBIAS		.EQU	(1 << (RAMLOC - 10))	; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
 MPGSEL_0	.EQU	$78		; Z2 MEM MGR BANK 0 PAGE SELECT REG (WRITE ONLY)
@@ -100,6 +100,7 @@ DUARTENABLE	.EQU	FALSE		; DUART: ENABLE 2681/2692 SERIAL DRIVER (DUART.ASM)
 UARTENABLE	.EQU	FALSE		; UART: ENABLE 8250/16550-LIKE SERIAL DRIVER (UART.ASM)
 ;
 ASCIENABLE	.EQU	TRUE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ASCIINTS	.EQU	TRUE		; ASCI: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
 ASCISWAP	.EQU	FALSE		; ASCI: SWAP CHANNELS
 ASCIBOOT	.EQU	0		; ASCI: REBOOT ON RCV CHAR (0=DISABLED)
 ASCI0CFG	.EQU	DEFSERCFG	; ASCI 0: SERIAL LINE CONFIG
diff --git a/Source/HBIOS/cfg_ezz80.asm b/Source/HBIOS/cfg_ezz80.asm
index 05380eb9..d5339255 100644
--- a/Source/HBIOS/cfg_ezz80.asm
+++ b/Source/HBIOS/cfg_ezz80.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_EZZ80	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_EZZ80	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z80		; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_115200_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 MPGSEL_0	.EQU	$78		; Z2 MEM MGR BANK 0 PAGE SELECT REG (WRITE ONLY)
 MPGSEL_1	.EQU	$79		; Z2 MEM MGR BANK 1 PAGE SELECT REG (WRITE ONLY)
 MPGSEL_2	.EQU	$7A		; Z2 MEM MGR BANK 2 PAGE SELECT REG (WRITE ONLY)
diff --git a/Source/HBIOS/cfg_master.asm b/Source/HBIOS/cfg_master.asm
index 0027b3ad..abc83e15 100644
--- a/Source/HBIOS/cfg_master.asm
+++ b/Source/HBIOS/cfg_master.asm
@@ -12,7 +12,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_SBC		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_SBC		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z80		; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -30,7 +30,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_NONE		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_NONE		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 RAMLOC		.EQU	19		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
 RAMBIAS		.EQU	(1 << (RAMLOC - 10))	; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
 MPCL_RAM	.EQU	$78		; SBC MEM MGR RAM PAGE SELECT REG (WRITE ONLY)
@@ -60,6 +60,11 @@ N8_ACR		.EQU	$94		; N8: AUXILLARY CONTROL REGISTER (ACR) ADR
 N8_RMAP		.EQU	$96		; N8: ROM PAGE REGISTER ADR
 N8_DEFACR	.EQU	$1B		; N8: AUX CTL REGISTER DEFAULT VALUE (QUIESCIENT STATE)
 ;
+RPH_PPI0	.EQU	$88		; RPH: FIRST PARALLEL PORT REGISTERS BASE ADR
+RPH_RTC		.EQU	$84		; RPH: RTC LATCH REGISTER ADR
+RPH_ACR		.EQU	$80		; RPH: AUXILLARY CONTROL REGISTER (ACR) ADR
+RPH_DEFACR	.EQU	$00		; RPH: AUX CTL REGISTER DEFAULT VALUE (QUIESCIENT STATE)
+;
 MK4_IDE		.EQU	$80		; MK4: IDE REGISTERS BASE ADR
 MK4_XAR		.EQU	$88		; MK4: EXTERNAL ADDRESS REGISTER (XAR) ADR
 MK4_SD		.EQU	$89		; MK4: SD CARD CONTROL REGISTER ADR
@@ -153,6 +158,7 @@ UARTRC		.EQU	FALSE		; UART: AUTO-DETECT RC UART
 UARTDUAL	.EQU	FALSE		; UART: AUTO-DETECT DUAL UART
 ;
 ASCIENABLE	.EQU	FALSE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ASCIINTS	.EQU	TRUE		; ASCI: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
 ASCISWAP	.EQU	FALSE		; ASCI: SWAP CHANNELS
 ASCIBOOT	.EQU	0		; ASCI: REBOOT ON RCV CHAR (0=DISABLED)
 ASCI0CFG	.EQU	DEFSERCFG	; ASCI 0: SERIAL LINE CONFIG
diff --git a/Source/HBIOS/cfg_mbc.asm b/Source/HBIOS/cfg_mbc.asm
index 0158e09f..7a7f80f8 100644
--- a/Source/HBIOS/cfg_mbc.asm
+++ b/Source/HBIOS/cfg_mbc.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_MBC		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_MBC		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z80		; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_MBC		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_MBC		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 MPCL_RAM	.EQU	$78		; SBC MEM MGR RAM PAGE SELECT REG (WRITE ONLY)
 MPCL_ROM	.EQU	$7C		; SBC MEM MGR ROM PAGE SELECT REG (WRITE ONLY)
 ;
diff --git a/Source/HBIOS/cfg_mk4.asm b/Source/HBIOS/cfg_mk4.asm
index bb816d8e..73aaa8e2 100644
--- a/Source/HBIOS/cfg_mk4.asm
+++ b/Source/HBIOS/cfg_mk4.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_MK4		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_MK4		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z180	; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 RAMLOC		.EQU	19		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
 RAMBIAS		.EQU	(1 << (RAMLOC - 10))	; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
 ;
@@ -122,6 +122,7 @@ UARTRC		.EQU	FALSE		; UART: AUTO-DETECT RC UART
 UARTDUAL	.EQU	FALSE		; UART: AUTO-DETECT DUAL UART
 ;
 ASCIENABLE	.EQU	TRUE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ASCIINTS	.EQU	TRUE		; ASCI: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
 ASCISWAP	.EQU	FALSE		; ASCI: SWAP CHANNELS
 ASCIBOOT	.EQU	0		; ASCI: REBOOT ON RCV CHAR (0=DISABLED)
 ASCI0CFG	.EQU	DEFSERCFG	; ASCI 0: SERIAL LINE CONFIG
diff --git a/Source/HBIOS/cfg_n8.asm b/Source/HBIOS/cfg_n8.asm
index 57f589d7..acc3aaa5 100644
--- a/Source/HBIOS/cfg_n8.asm
+++ b/Source/HBIOS/cfg_n8.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_N8		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_N8		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z180	; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_N8		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_N8		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 RAMBIAS		.EQU	0		; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
 RAMLOC		.EQU	0		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
 ;
@@ -124,6 +124,7 @@ UARTRC		.EQU	FALSE		; UART: AUTO-DETECT RC UART
 UARTDUAL	.EQU	FALSE		; UART: AUTO-DETECT DUAL UART
 ;
 ASCIENABLE	.EQU	TRUE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ASCIINTS	.EQU	TRUE		; ASCI: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
 ASCISWAP	.EQU	FALSE		; ASCI: SWAP CHANNELS
 ASCIBOOT	.EQU	0		; ASCI: REBOOT ON RCV CHAR (0=DISABLED)
 ASCI0CFG	.EQU	DEFSERCFG	; ASCI 0: SERIAL LINE CONFIG
diff --git a/Source/HBIOS/cfg_rcz180.asm b/Source/HBIOS/cfg_rcz180.asm
index e558f32e..4c0ee626 100644
--- a/Source/HBIOS/cfg_rcz180.asm
+++ b/Source/HBIOS/cfg_rcz180.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_RCZ180	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_RCZ180	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z180	; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_115200_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 RAMLOC		.EQU	19		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
 RAMBIAS		.EQU	(1 << (RAMLOC - 10))	; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
 MPGSEL_0	.EQU	$78		; Z2 MEM MGR BANK 0 PAGE SELECT REG (WRITE ONLY)
@@ -125,6 +125,7 @@ UARTRC		.EQU	TRUE		; UART: AUTO-DETECT RC UART
 UARTDUAL	.EQU	FALSE		; UART: AUTO-DETECT DUAL UART
 ;
 ASCIENABLE	.EQU	TRUE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ASCIINTS	.EQU	TRUE		; ASCI: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
 ASCISWAP	.EQU	FALSE		; ASCI: SWAP CHANNELS
 ASCIBOOT	.EQU	0		; ASCI: REBOOT ON RCV CHAR (0=DISABLED)
 ASCI0CFG	.EQU	DEFSERCFG	; ASCI 0: SERIAL LINE CONFIG
diff --git a/Source/HBIOS/cfg_rcz280.asm b/Source/HBIOS/cfg_rcz280.asm
index 509ca067..cfe8bbff 100644
--- a/Source/HBIOS/cfg_rcz280.asm
+++ b/Source/HBIOS/cfg_rcz280.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_RCZ280	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_RCZ280	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z280	; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_115200_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 RAMLOC		.EQU	19		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
 RAMBIAS		.EQU	(1 << (RAMLOC - 10))	; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
 MPGSEL_0	.EQU	$78		; Z2 MEM MGR BANK 0 PAGE SELECT REG (WRITE ONLY)
diff --git a/Source/HBIOS/cfg_rcz80.asm b/Source/HBIOS/cfg_rcz80.asm
index b7023e43..3628aae0 100644
--- a/Source/HBIOS/cfg_rcz80.asm
+++ b/Source/HBIOS/cfg_rcz80.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_RCZ80	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_RCZ80	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z80		; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_115200_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 MPGSEL_0	.EQU	$78		; Z2 MEM MGR BANK 0 PAGE SELECT REG (WRITE ONLY)
 MPGSEL_1	.EQU	$79		; Z2 MEM MGR BANK 1 PAGE SELECT REG (WRITE ONLY)
 MPGSEL_2	.EQU	$7A		; Z2 MEM MGR BANK 2 PAGE SELECT REG (WRITE ONLY)
diff --git a/Source/HBIOS/cfg_rph.asm b/Source/HBIOS/cfg_rph.asm
new file mode 100644
index 00000000..a6d8fe5d
--- /dev/null
+++ b/Source/HBIOS/cfg_rph.asm
@@ -0,0 +1,249 @@
+;
+;==================================================================================================
+;   ROMWBW 2.X CONFIGURATION FOR RHYOPHYRE
+;==================================================================================================
+;
+; THIS FILE CONTAINS THE FULL SET OF DEFAULT CONFIGURATION SETTINGS FOR THE PLATFORM
+; INDICATED ABOVE. THIS FILE SHOULD *NOT* NORMALLY BE CHANGED.	INSTEAD, YOU SHOULD
+; OVERRIDE ANY SETTINGS YOU WANT USING A CONFIGURATION FILE IN THE CONFIG DIRECTORY
+; UNDER THIS DIRECTORY.
+;
+; THIS FILE CAN BE CONSIDERED A REFERENCE THAT LISTS ALL POSSIBLE CONFIGURATION SETTINGS
+; FOR THE PLATFORM.
+;
+#DEFINE PLATFORM_NAME "RHYOPHYRE"
+;
+#INCLUDE "hbios.inc"
+;
+PLATFORM	.EQU	PLT_RPH		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
+CPUFAM		.EQU	CPU_Z180	; CPU FAMILY: CPU_[Z80|Z180|Z280]
+BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
+BATCOND		.EQU	TRUE		; ENABLE LOW BATTERY WARNING MESSAGE
+HBIOS_MUTEX	.EQU	FALSE		; ENABLE REENTRANT CALLS TO HBIOS (ADDS OVERHEAD)
+USELZSA2	.EQU	TRUE		; ENABLE FONT COMPRESSION
+TICKFREQ	.EQU	50		; DESIRED PERIODIC TIMER INTERRUPT FREQUENCY (HZ)
+;
+BOOT_TIMEOUT	.EQU	-1		; AUTO BOOT TIMEOUT IN SECONDS, -1 TO DISABLE, 0 FOR IMMEDIATE
+;
+CPUSPDCAP	.EQU	SPD_FIXED	; CPU SPEED CHANGE CAPABILITY SPD_FIXED|SPD_HILO
+CPUSPDDEF	.EQU	SPD_HIGH	; CPU SPEED DEFAULT SPD_UNSUP|SPD_HIGH|SPD_LOW
+CPUOSC		.EQU	18432000	; CPU OSC FREQ IN MHZ
+INTMODE		.EQU	2		; INTERRUPTS: 0=NONE, 1=MODE 1, 2=MODE 2, 3=MODE 3 (Z280)
+DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
+;
+RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
+ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
+MEMMGR		.EQU	MM_RPH		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
+RAMBIAS		.EQU	0		; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
+RAMLOC		.EQU	0		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
+;
+Z180_BASE	.EQU	$40		; Z180: I/O BASE ADDRESS FOR INTERNAL REGISTERS
+Z180_CLKDIV	.EQU	1		; Z180: CHK DIV: 0=OSC/2, 1=OSC, 2=OSC*2
+Z180_MEMWAIT	.EQU	0		; Z180: MEMORY WAIT STATES (0-3)
+Z180_IOWAIT	.EQU	1		; Z180: I/O WAIT STATES TO ADD ABOVE 1 W/S BUILT-IN (0-3)
+Z180_TIMER	.EQU	TRUE		; Z180: ENABLE Z180 SYSTEM PERIODIC TIMER
+;
+RPH_PPI0	.EQU	$88		; RPH: FIRST PARALLEL PORT REGISTERS BASE ADR
+RPH_RTC		.EQU	$84		; RPH: RTC LATCH REGISTER ADR
+RPH_ACR		.EQU	$80		; RPH: AUXILLARY CONTROL REGISTER (ACR) ADR
+RPH_DEFACR	.EQU	$20		; RPH: AUX CTL REGISTER DEFAULT VALUE (QUIESCIENT STATE)
+;
+RTCIO		.EQU	RPH_RTC		; RTC LATCH REGISTER ADR
+;
+KIOENABLE	.EQU	FALSE		; ENABLE ZILOG KIO SUPPORT
+KIOBASE		.EQU	$80		; KIO BASE I/O ADDRESS
+;
+CTCENABLE	.EQU	FALSE		; ENABLE ZILOG CTC SUPPORT
+CTCDEBUG	.EQU	FALSE		; ENABLE CTC DRIVER DEBUG OUTPUT
+CTCBASE		.EQU	$B0		; CTC BASE I/O ADDRESS
+CTCTIMER	.EQU	FALSE		; ENABLE CTC PERIODIC TIMER
+;
+EIPCENABLE	.EQU	FALSE		; EIPC: ENABLE Z80 EIPC (Z84C15) INITIALIZATION
+;
+SKZENABLE	.EQU	FALSE		; ENABLE SERGEY'S Z80-512K FEATURES
+;
+WDOGMODE	.EQU	WDOG_NONE	; WATCHDOG MODE: WDOG_[NONE|EZZ80|SKZ]
+;
+DIAGENABLE	.EQU	FALSE		; ENABLES OUTPUT TO 8 BIT LED DIAGNOSTIC PORT
+DIAGPORT	.EQU	$00		; DIAGNOSTIC PORT ADDRESS
+DIAGDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON DIAGNOSTIC LEDS
+;
+LEDENABLE	.EQU	FALSE		; ENABLES STATUS LED
+LEDMODE		.EQU	LEDMODE_RTC	; LEDMODE_[STD|RTC]
+LEDPORT		.EQU	RTCIO		; STATUS LED PORT ADDRESS
+LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
+;
+DSKYENABLE	.EQU	FALSE		; ENABLES DSKY
+DSKYMODE	.EQU	DSKYMODE_V1	; DSKY VERSION: DSKYMODE_[V1|NG]
+DSKYPPIBASE	.EQU	RPH_PPI0		; BASE I/O ADDRESS OF DSKY PPI
+DSKYOSC		.EQU	3000000		; OSCILLATOR FREQ FOR DSKYNG (IN HZ)
+;
+BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
+CRTACT		.EQU	FALSE		; ACTIVATE CRT (VDU,CVDU,PROPIO,ETC) AT STARTUP
+VDAEMU		.EQU	EMUTYP_ANSI	; VDA EMULATION: EMUTYP_[TTY|ANSI]
+ANSITRACE	.EQU	1		; ANSI DRIVER TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+PPKTRACE	.EQU	1		; PPK DRIVER TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+KBDTRACE	.EQU	1		; KBD DRIVER TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+PPKKBLOUT	.EQU	KBD_US		; PPK KEYBOARD LANGUAGE: KBD_[US|DE]
+KBDKBLOUT	.EQU	KBD_US		; KBD KEYBOARD LANGUAGE: KBD_[US|DE]
+MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VDA DRIVER)
+MKYKBLOUT	.EQU	KBD_US		; KBD KEYBOARD LANGUAGE: KBD_[US|DE]
+;
+DSRTCENABLE	.EQU	TRUE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
+;
+BQRTCENABLE	.EQU	FALSE		; BQRTC: ENABLE BQ4845 CLOCK DRIVER (BQRTC.ASM)
+BQRTC_BASE	.EQU	$50		; BQRTC: I/O BASE ADDRESS
+;
+INTRTCENABLE	.EQU	FALSE		; ENABLE PERIODIC INTERRUPT CLOCK DRIVER (INTRTC.ASM)
+;
+RP5RTCENABLE	.EQU	FALSE		; RP5C01 RTC BASED CLOCK (RP5RTC.ASM)
+;
+HTIMENABLE	.EQU	FALSE		; ENABLE SIMH TIMER SUPPORT
+SIMRTCENABLE	.EQU	FALSE		; ENABLE SIMH CLOCK DRIVER (SIMRTC.ASM)
+;
+DS7RTCENABLE	.EQU	FALSE		; DS7RTC: ENABLE DS-1307 I2C CLOCK DRIVER (DS7RTC.ASM)
+DS7RTCMODE	.EQU	DS7RTCMODE_PCF	; DS7RTC: OPERATING MODE: DS7RTC_[PCF]
+;
+DUARTENABLE	.EQU	FALSE		; DUART: ENABLE 2681/2692 SERIAL DRIVER (DUART.ASM)
+;
+UARTENABLE	.EQU	FALSE		; UART: ENABLE 8250/16550-LIKE SERIAL DRIVER (UART.ASM)
+UARTOSC		.EQU	1843200		; UART: OSC FREQUENCY IN MHZ
+UARTINTS	.EQU	FALSE		; UART: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
+UARTCFG		.EQU	DEFSERCFG	; UART: LINE CONFIG FOR UART PORTS
+UARTCASSPD	.EQU	SER_300_8N1	; UART: ECB CASSETTE UART DEFAULT SPEED
+UARTSBC		.EQU	FALSE		; UART: AUTO-DETECT SBC/ZETA ONBOARD UART
+UARTSBCFORCE	.EQU	FALSE		; UART: FORCE DETECTION OF SBC UART (FOR SIMH)
+UARTCAS		.EQU	FALSE		; UART: AUTO-DETECT ECB CASSETTE UART
+UARTMFP		.EQU	FALSE		; UART: AUTO-DETECT MF/PIC UART
+UART4		.EQU	FALSE		; UART: AUTO-DETECT 4UART UART
+UARTRC		.EQU	FALSE		; UART: AUTO-DETECT RC UART
+UARTDUAL	.EQU	FALSE		; UART: AUTO-DETECT DUAL UART
+;
+ASCIENABLE	.EQU	TRUE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ASCIINTS	.EQU	TRUE		; ASCI: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
+ASCISWAP	.EQU	FALSE		; ASCI: SWAP CHANNELS
+ASCIBOOT	.EQU	0		; ASCI: REBOOT ON RCV CHAR (0=DISABLED)
+ASCI0CFG	.EQU	DEFSERCFG	; ASCI 0: SERIAL LINE CONFIG
+ASCI1CFG	.EQU	DEFSERCFG	; ASCI 1: SERIAL LINE CONFIG
+;
+Z2UENABLE	.EQU	FALSE		; Z2U: ENABLE Z280 UART SERIAL DRIVER (Z2U.ASM)
+;
+ACIAENABLE	.EQU	FALSE		; ACIA: ENABLE MOTOROLA 6850 ACIA DRIVER (ACIA.ASM)
+;
+SIOENABLE	.EQU	FALSE		; SIO: ENABLE ZILOG SIO SERIAL DRIVER (SIO.ASM)
+;
+XIOCFG		.EQU	DEFSERCFG	; XIO: SERIAL LINE CONFIG
+;
+VDUENABLE	.EQU	FALSE		; VDU: ENABLE VDU VIDEO/KBD DRIVER (VDU.ASM)
+VDUSIZ		.EQU	V80X25		; VDU: DISPLAY FORMAT [V80X24|V80X25|V80X30]
+CVDUENABLE	.EQU	FALSE		; CVDU: ENABLE CVDU VIDEO/KBD DRIVER (CVDU.ASM)
+CVDUMODE	.EQU	CVDUMODE_ECB	; CVDU: CVDU MODE: CVDUMODE_[NONE|ECB|MBC]
+CVDUMON		.EQU	CVDUMON_EGA	; CVDU: CVDU MONITOR SETUP: CVDUMON_[NONE|CGA|EGA]
+NECENABLE	.EQU	FALSE		; NEC: ENABLE NEC UPD7220 VIDEO/KBD DRIVER (NEC.ASM)
+TMSENABLE	.EQU	FALSE		; TMS: ENABLE TMS9918 VIDEO/KBD DRIVER (TMS.ASM)
+TMSMODE		.EQU	TMSMODE_N8	; TMS: DRIVER MODE: TMSMODE_[SCG|N8|RC|RCV9958|RCKBD]
+TMSTIMENABLE	.EQU	FALSE		; TMS: ENABLE TIMER INTERRUPTS (REQUIRES IM1)
+VGAENABLE	.EQU	FALSE		; VGA: ENABLE VGA VIDEO/KBD DRIVER (VGA.ASM)
+VGASIZ		.EQU	V80X25		; VGA: DISPLAY FORMAT [V80X25|V80X30|V80X43]
+;
+MDENABLE	.EQU	TRUE		; MD: ENABLE MEMORY (ROM/RAM) DISK DRIVER (MD.ASM)
+MDROM		.EQU	TRUE		; MD: ENABLE ROM DISK
+MDRAM		.EQU	TRUE		; MD: ENABLE RAM DISK
+MDTRACE		.EQU	1		; MD: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+MDFFENABLE	.EQU	FALSE		; MD: ENABLE FLASH FILE SYSTEM
+;
+FDENABLE	.EQU	FALSE		; FD: ENABLE FLOPPY DISK DRIVER (FD.ASM)
+FDMODE		.EQU	FDMODE_N8	; FD: DRIVER MODE: FDMODE_[DIO|ZETA|ZETA2|DIDE|N8|DIO3|RCSMC|RCWDC|DYNO|EPFDC|MBC]
+FDCNT		.EQU	2		; FD: NUMBER OF FLOPPY DRIVES ON THE INTERFACE (1-2)
+FDTRACE		.EQU	1		; FD: TRACE LEVEL (0=NO,1=FATAL,2=ERRORS,3=ALL)
+FDMEDIA		.EQU	FDM144		; FD: DEFAULT MEDIA FORMAT FDM[720|144|360|120|111]
+FDMEDIAALT	.EQU	FDM720		; FD: ALTERNATE MEDIA FORMAT FDM[720|144|360|120|111]
+FDMAUTO		.EQU	TRUE		; FD: AUTO SELECT DEFAULT/ALTERNATE MEDIA FORMATS
+;
+RFENABLE	.EQU	FALSE		; RF: ENABLE RAM FLOPPY DRIVER
+RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-4)
+;
+IDEENABLE	.EQU	FALSE		; IDE: ENABLE IDE DISK DRIVER (IDE.ASM)
+IDETRACE	.EQU	1		; IDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+IDECNT		.EQU	1		; IDE: NUMBER OF IDE INTERFACES TO DETECT (1-3), 2 DRIVES EACH
+IDE0MODE	.EQU	IDEMODE_DIO	; IDE 0: DRIVER MODE: IDEMODE_[DIO|DIDE|MK4|RC]
+IDE0BASE	.EQU	$20		; IDE 0: IO BASE ADDRESS
+IDE0DATLO	.EQU	$20		; IDE 0: DATA LO PORT FOR 16-BIT I/O
+IDE0DATHI	.EQU	$28		; IDE 0: DATA HI PORT FOR 16-BIT I/O
+IDE0A8BIT	.EQU	FALSE		; IDE 0A (MASTER): 8 BIT XFER
+IDE0B8BIT	.EQU	FALSE		; IDE 0B (MASTER): 8 BIT XFER
+IDE1MODE	.EQU	IDEMODE_NONE	; IDE 1: DRIVER MODE: IDEMODE_[DIO|DIDE|MK4|RC]
+IDE1BASE	.EQU	$00		; IDE 1: IO BASE ADDRESS
+IDE1DATLO	.EQU	$00		; IDE 1: DATA LO PORT FOR 16-BIT I/O
+IDE1DATHI	.EQU	$00		; IDE 1: DATA HI PORT FOR 16-BIT I/O
+IDE1A8BIT	.EQU	TRUE		; IDE 1A (MASTER): 8 BIT XFER
+IDE1B8BIT	.EQU	TRUE		; IDE 1B (MASTER): 8 BIT XFER
+IDE2MODE	.EQU	IDEMODE_NONE	; IDE 2: DRIVER MODE: IDEMODE_[DIO|DIDE|MK4|RC]
+IDE2BASE	.EQU	$00		; IDE 2: IO BASE ADDRESS
+IDE2DATLO	.EQU	$00		; IDE 2: DATA LO PORT FOR 16-BIT I/O
+IDE2DATHI	.EQU	$00		; IDE 2: DATA HI PORT FOR 16-BIT I/O
+IDE2A8BIT	.EQU	TRUE		; IDE 2A (MASTER): 8 BIT XFER
+IDE2B8BIT	.EQU	TRUE		; IDE 2B (MASTER): 8 BIT XFER
+;
+PPIDEENABLE	.EQU	TRUE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM)
+PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+PPIDECNT	.EQU	1		; PPIDE: NUMBER OF PPI CHIPS TO DETECT (1-3), 2 DRIVES PER CHIP
+PPIDE0BASE	.EQU	RPH_PPI0	; PPIDE 0: PPI REGISTERS BASE ADR
+PPIDE0A8BIT	.EQU	FALSE		; PPIDE 0A (MASTER): 8 BIT XFER
+PPIDE0B8BIT	.EQU	FALSE		; PPIDE 0B (SLAVE): 8 BIT XFER
+PPIDE1BASE	.EQU	$00		; PPIDE 1: PPI REGISTERS BASE ADR
+PPIDE1A8BIT	.EQU	FALSE		; PPIDE 1A (MASTER): 8 BIT XFER
+PPIDE1B8BIT	.EQU	FALSE		; PPIDE 0B (SLAVE): 8 BIT XFER
+PPIDE2BASE	.EQU	$00		; PPIDE 2: PPI REGISTERS BASE ADR
+PPIDE2A8BIT	.EQU	FALSE		; PPIDE 2A (MASTER): 8 BIT XFER
+PPIDE2B8BIT	.EQU	FALSE		; PPIDE 0B (SLAVE): 8 BIT XFER
+;
+SDENABLE	.EQU	FALSE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
+SDMODE		.EQU	SDMODE_CSIO	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
+SDPPIBASE	.EQU	RPH_PPI0	; SD: BASE I/O ADDRESS OF PPI FOR PPI MODDE
+SDCNT		.EQU	1		; SD: NUMBER OF SD CARD DEVICES (1-2), FOR DSD & SC ONLY
+SDTRACE		.EQU	1		; SD: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+SDCSIOFAST	.EQU	FALSE		; SD: ENABLE TABLE-DRIVEN BIT INVERTER IN CSIO MODE
+;
+PRPENABLE	.EQU	FALSE		; PRP: ENABLE ECB PROPELLER IO BOARD DRIVER (PRP.ASM)
+PRPSDENABLE	.EQU	FALSE		; PRP: ENABLE PROPIO DRIVER SD CARD SUPPORT
+PRPSDTRACE	.EQU	1		; PRP: SD CARD TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
+PRPCONENABLE	.EQU	FALSE		; PRP: ENABLE PROPIO DRIVER VIDEO/KBD SUPPORT
+;
+PPPENABLE	.EQU	FALSE		; PPP: ENABLE ZETA PARALLEL PORT PROPELLER BOARD DRIVER (PPP.ASM)
+;
+HDSKENABLE	.EQU	FALSE		; HDSK: ENABLE SIMH HDSK DISK DRIVER (HDSK.ASM)
+;
+PIOENABLE	.EQU	FALSE		; PIO: ENABLE ZILOG PIO DRIVER (PIO.ASM)
+PIOCNT		.EQU	2		; PIO: NUMBER OF CHIPS TO DETECT (1-2), 2 CHANNELS PER CHIP
+PIO0BASE	.EQU	$B8		; PIO 0: REGISTERS BASE ADR
+PIO1BASE	.EQU	$BC		; PIO 1: REGISTERS BASE ADR
+;
+CENENABLE	.EQU	FALSE		; CEN: ENABLE CENTRONICS DRIVER (CEN.ASM)
+;
+PIO_4P		.EQU	FALSE		; PIO: ENABLE PARALLEL PORT DRIVER FOR ECB 4P BOARD
+PIO4BASE	.EQU	$90		; PIO: PIO REGISTERS BASE ADR FOR ECB 4P BOARD
+PIO_ZP		.EQU	FALSE		; PIO: ENABLE PARALLEL PORT DRIVER FOR ECB ZILOG PERIPHERALS BOARD (PIO.ASM)
+PIOZBASE	.EQU	$88		; PIO: PIO REGISTERS BASE ADR FOR ECB ZP BOARD
+PIO_SBC		.EQU	FALSE		; PIO: ENABLE PARALLEL PORT DRIVER FOR 8255 CHIP
+PIOSBASE	.EQU	RPH_PPI0		; PIO: PIO REGISTERS BASE ADR FOR SBC PPI
+;
+UFENABLE	.EQU	FALSE		; UF: ENABLE ECB USB FIFO DRIVER (UF.ASM)
+FIFO_BASE	.EQU	$0C		; UF: REGISTERS BASE ADR
+;
+SN76489ENABLE	.EQU	FALSE		; SN76489 SOUND DRIVER
+AUDIOTRACE	.EQU	FALSE		; ENABLE TRACING TO CONSOLE OF SOUND DRIVER
+SN7CLK		.EQU	CPUOSC / 4	; DEFAULT TO CPUOSC / 4
+SNMODE		.EQU	SNMODE_NONE	; DRIVER MODE: SNMODE_[NONE|RC2014|VGM]
+;
+AY38910ENABLE	.EQU	FALSE		; AY: AY-3-8910 / YM2149 SOUND DRIVER
+AY_CLK		.EQU	CPUOSC / 4	; DEFAULT TO CPUOSC / 4
+AYMODE		.EQU	AYMODE_N8	; AY: DRIVER MODE: AYMODE_[SCG|N8|RCZ80|RCZ180|MSX|LINC|MBC]
+;
+SPKENABLE	.EQU	FALSE		; SPK: ENABLE RTC LATCH IOBIT SOUND DRIVER (SPK.ASM)
+;
+DMAENABLE	.EQU	FALSE		; DMA: ENABLE DMA DRIVER (DMA.ASM)
+DMABASE		.EQU	$E0		; DMA: DMA BASE ADDRESS
+DMAMODE		.EQU	DMAMODE_Z180	; DMA: DMA MODE (NONE|ECB|Z180|Z280|RC|MBC)
diff --git a/Source/HBIOS/cfg_sbc.asm b/Source/HBIOS/cfg_sbc.asm
index d2e9633b..1df79bc0 100644
--- a/Source/HBIOS/cfg_sbc.asm
+++ b/Source/HBIOS/cfg_sbc.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_SBC		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_SBC		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z80		; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_SBC		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_SBC		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 MPCL_RAM	.EQU	$78		; SBC MEM MGR RAM PAGE SELECT REG (WRITE ONLY)
 MPCL_ROM	.EQU	$7C		; SBC MEM MGR ROM PAGE SELECT REG (WRITE ONLY)
 ;
diff --git a/Source/HBIOS/cfg_scz180.asm b/Source/HBIOS/cfg_scz180.asm
index 2ba1afe1..a801d14d 100644
--- a/Source/HBIOS/cfg_scz180.asm
+++ b/Source/HBIOS/cfg_scz180.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_SCZ180	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_SCZ180	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z180	; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_115200_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z180		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 RAMLOC		.EQU	19		; START OF RAM AS POWER OF 2 (2^N) IN PHYSICAL ADDRESS SPACE
 RAMBIAS		.EQU	(1 << (RAMLOC - 10))	; OFFSET OF START OF RAM IN PHYSICAL ADDRESS SPACE
 ;
@@ -120,6 +120,7 @@ UARTRC		.EQU	TRUE		; UART: AUTO-DETECT RC UART
 UARTDUAL	.EQU	FALSE		; UART: AUTO-DETECT DUAL UART
 ;
 ASCIENABLE	.EQU	TRUE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ASCIINTS	.EQU	TRUE		; ASCI: INCLUDE INTERRUPT SUPPORT UNDER IM1/2/3
 ASCISWAP	.EQU	FALSE		; ASCI: SWAP CHANNELS
 ASCIBOOT	.EQU	0		; ASCI: REBOOT ON RCV CHAR (0=DISABLED)
 ASCI0CFG	.EQU	DEFSERCFG	; ASCI 0: SERIAL LINE CONFIG
diff --git a/Source/HBIOS/cfg_una.asm b/Source/HBIOS/cfg_una.asm
index 9d0e2af5..eae041fb 100644
--- a/Source/HBIOS/cfg_una.asm
+++ b/Source/HBIOS/cfg_una.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "../UBIOS/ubios.inc"
 ;
-;PLATFORM	.EQU	PLT_UNA		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+;PLATFORM	.EQU	PLT_UNA		; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 BIOS		.EQU	BIOS_UNA	; HARDWARE BIOS: BIOS_[WBW|UNA]
 ;
 BOOT_TIMEOUT	.EQU	-1		; AUTO BOOT TIMEOUT IN SECONDS, -1 TO DISABLE, 0 FOR IMMEDIATE
diff --git a/Source/HBIOS/cfg_zeta.asm b/Source/HBIOS/cfg_zeta.asm
index 1ce35d28..1e6a3f80 100644
--- a/Source/HBIOS/cfg_zeta.asm
+++ b/Source/HBIOS/cfg_zeta.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_ZETA	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_ZETA	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z80		; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; BIOS_[WBW|UNA]: HARDWARE BIOS
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_SBC		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_SBC		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 MPCL_RAM	.EQU	$78		; SBC MEM MGR RAM PAGE SELECT REG (WRITE ONLY)
 MPCL_ROM	.EQU	$7C		; SBC MEM MGR ROM PAGE SELECT REG (WRITE ONLY)
 ;
diff --git a/Source/HBIOS/cfg_zeta2.asm b/Source/HBIOS/cfg_zeta2.asm
index fcb12b1c..a0cc2896 100644
--- a/Source/HBIOS/cfg_zeta2.asm
+++ b/Source/HBIOS/cfg_zeta2.asm
@@ -15,7 +15,7 @@
 ;
 #INCLUDE "hbios.inc"
 ;
-PLATFORM	.EQU	PLT_ZETA2	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC]
+PLATFORM	.EQU	PLT_ZETA2	; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCZ180|EZZ80|SCZ180|DYNO|RCZ280|MBC|RPH]
 CPUFAM		.EQU	CPU_Z80		; CPU FAMILY: CPU_[Z80|Z180|Z280]
 BIOS		.EQU	BIOS_WBW	; HARDWARE BIOS: BIOS_[WBW|UNA]
 BATCOND		.EQU	FALSE		; ENABLE LOW BATTERY WARNING MESSAGE
@@ -33,7 +33,7 @@ DEFSERCFG	.EQU	SER_38400_8N1	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
 ROMSIZE_CHK	.EQU	0		; ROMSIZE VALUE VEREIFICATION (0=DISABLED)
-MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC]
+MEMMGR		.EQU	MM_Z2		; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH]
 MPGSEL_0	.EQU	$78		; Z2 MEM MGR BANK 0 PAGE SELECT REG (WRITE ONLY)
 MPGSEL_1	.EQU	$79		; Z2 MEM MGR BANK 1 PAGE SELECT REG (WRITE ONLY)
 MPGSEL_2	.EQU	$7A		; Z2 MEM MGR BANK 2 PAGE SELECT REG (WRITE ONLY)
diff --git a/Source/HBIOS/dsrtc.asm b/Source/HBIOS/dsrtc.asm
index ded6c797..9b8c630d 100644
--- a/Source/HBIOS/dsrtc.asm
+++ b/Source/HBIOS/dsrtc.asm
@@ -66,28 +66,28 @@
 ; RTC LATCH WRITE
 ; ---------------
 ;
-; BIT	SBC	SBC-004	MFPIC	N8	N8-CSIO	MK4	SC130	SC131	SC126		MBC
-; -----	-------	-------	-------	-------	-------	-------	-------	-------	---------------	-------
-; D7	RTC_OUT RTC_OUT	--	RTC_OUT RTC_OUT	RTC_OUT	--	--	RTC_OUT,I2C_SDA	RTC_OUT
-; D6	RTC_CLK RTC_CLK	--	RTC_CLK RTC_CLK	RTC_CLK	--	--	RTC_CLK		RTC_CLK
-; D5	/RTC_WE /RTC_WE	--	/RTC_WE /RTC_WE	/RTC_WE	--	--	/RTC_WE		/RTC_WE
-; D4	RTC_CE	RTC_CE	--	RTC_CE  RTC_CE	RTC_CE	--	--	RTC_CE		RTC_CE
-; D3	NC	CLKSEL	/RTC_CE	NC	NC	NC	--	--	/SPI_CS2	CLKSEL
-; D2	NC	SPK	RTC_CLK	SPI_CS	SPI_CS	NC	/SPI_CS1/SPI_CS1/SPI_CS1	SPK
-; D1	--	--	RTC_WE	SPI_CLK	NC	NC	--	--	FS		LED1
-; D0	--	--	RTC_OUT	SPI_DI	NC	NC	--	--	I2C_SCL		LED0
+; BIT	SBC	SBC-004	MFPIC	N8	N8-CSIO	MK4	SC130	SC131	SC126		MBC	RPH
+; -----	-------	-------	-------	-------	-------	-------	-------	-------	---------------	------- -------
+; D7	RTC_OUT RTC_OUT	--	RTC_OUT RTC_OUT	RTC_OUT	--	--	RTC_OUT,I2C_SDA	RTC_OUT	RTC_OUT
+; D6	RTC_CLK RTC_CLK	--	RTC_CLK RTC_CLK	RTC_CLK	--	--	RTC_CLK		RTC_CLK	RTC_CLK
+; D5	/RTC_WE /RTC_WE	--	/RTC_WE /RTC_WE	/RTC_WE	--	--	/RTC_WE		/RTC_WE	/RTC_WE
+; D4	RTC_CE	RTC_CE	--	RTC_CE  RTC_CE	RTC_CE	--	--	RTC_CE		RTC_CE	RTC_CE
+; D3	NC	CLKSEL	/RTC_CE	NC	NC	NC	--	--	/SPI_CS2	CLKSEL	--
+; D2	NC	SPK	RTC_CLK	SPI_CS	SPI_CS	NC	/SPI_CS1/SPI_CS1/SPI_CS1	SPK	--
+; D1	--	--	RTC_WE	SPI_CLK	NC	NC	--	--	FS		LED1	--
+; D0	--	--	RTC_OUT	SPI_DI	NC	NC	--	--	I2C_SCL		LED0	--
 ;
 ; RTC LATCH READ
 ; --------------
 ;
-; D7	--	--	--	--	--	--	--	--	I2C_SDA		--
-; D6	CFG	CFG	--	SPI_DO	CFG	--	--	--	--		CFG
-; D5	--	--	--	--	--	--	--	--	--		--
-; D4	--	--	--	--	--	--	--	--	--		--
-; D3	--	--	--	--	--	--	--	--	--		--
-; D2	--	--	--	--	--	--	--	--	--		--
-; D1	----	--	--	--	--	--	--	--	--		CLKSEL
-; D0	RTC_IN	RTC_IN	RTC_IN	RTC_IN	RTC_IN	RTC_IN	--	--	RTC_IN		RTC_IN
+; D7	--	--	--	--	--	--	--	--	I2C_SDA		--	--
+; D6	CFG	CFG	--	SPI_DO	CFG	--	--	--	--		CFG	--
+; D5	--	--	--	--	--	--	--	--	--		--	--
+; D4	--	--	--	--	--	--	--	--	--		--	--
+; D3	--	--	--	--	--	--	--	--	--		--	--
+; D2	--	--	--	--	--	--	--	--	--		--	--
+; D1	----	--	--	--	--	--	--	--	--		CLKSEL	--
+; D0	RTC_IN	RTC_IN	RTC_IN	RTC_IN	RTC_IN	RTC_IN	--	--	RTC_IN		RTC_IN	RTC_IN
 ;
 #IF (DSRTCMODE == DSRTCMODE_STD)
 ;
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index ac6d2980..b2e8ed35 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -556,6 +556,28 @@ HBX_RAMX:
 HBX_MMA	.DB	0			; TEMPORARY STORAGE FOR REG A
 #ENDIF
 ;
+#IF (MEMMGR == MM_RPH)
+	BIT	7,A			; TEST BIT 7 FOR RAM VS. ROM
+	JR	Z,HBX_ROM		; IF NOT SET, SELECT ROM PAGE
+;
+HBX_RAM:
+	AND	%00011111		; AVOID WRAPPING BITS
+	RLCA				; SCALE SELECTOR TO
+	RLCA				; ... GO FROM Z180 4K PAGE SIZE
+	RLCA				; ... TO DESIRED 32K PAGE SIZE
+	OUT0	(Z180_BBR),A		; WRITE TO BANK BASE
+	LD	A,RPH_DEFACR | 80H	; SELECT RAM BY SETTING BIT 7
+	OUT0	(RPH_ACR),A		; ... IN RPH ACR REGISTER
+	RET				; DONE
+;
+HBX_ROM:
+	OR	RPH_DEFACR		; COMBINE WITH DEFAULT BITS
+	OUT0	(RPH_ACR),A		; BANK INDEX TO RPH ACR REGISTER
+	XOR	A			; ZERO ACCUM
+	OUT0	(Z180_BBR),A		; ZERO BANK BASE
+	RET				; DONE
+#ENDIF
+;
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ; Copy Data - Possibly between banks.  This resembles CP/M 3, but
 ;  usage of the HL and DE registers is reversed.
@@ -1101,6 +1123,11 @@ Z280_BOOTERR	.TEXT	"\r\n\r\n*** Application mode boot not supported under Z280 n
 	OUT0	(N8_ACR),A		; ... REGISTER IS INITIALIZED
 #ENDIF
 ;
+#IF (PLATFORM == PLT_RPH)
+	LD	A,RPH_DEFACR		; ENSURE RPH ACR
+	OUT0	(RPH_ACR),A		; ... REGISTER IS INITIALIZED
+#ENDIF
+;
 #IF (DIAGENABLE)
 	LD	A,%00000001
 	OUT	(DIAGPORT),A
@@ -1238,7 +1265,7 @@ Z280_INITZ:
 	LD	A,$F0
 	OUT0	(Z180_DCNTL),A
 
-  #IF ((MEMMGR == MM_Z180) | (MEMMGR == MM_N8))
+  #IF ((MEMMGR == MM_Z180) | (MEMMGR == MM_N8) | (MEMMGR == MM_RPH))
 	; Z180 MMU SETUP
 	LD	A,$80
 	OUT0	(Z180_CBAR),A		; SETUP FOR 32K/32K BANK CONFIG
@@ -1919,20 +1946,20 @@ HB_CPUSPD2:
 ;
 	LD	HL,(HB_CPUOSC)	; INIT HL TO CPU OSC FREQ (KHZ)
 ;
-  #IF (Z180_CLKDIV == 0)
 	; ADJUST HL TO REFLECT HALF SPEED OPERATION
 	SRL	H		; ADJUST HL ASSUMING
 	RR	L		; HALF SPEED OPERATION
-  #ENDIF
 ;	
-  #IF (Z180_CLKDIV == 1)
+  #IF (Z180_CLKDIV >= 1)
 	LD	A,(HB_CPUTYPE)	; GET CPU TYPE
 	CP	2		; Z8S180 REV K OR BETTER?
 	JR	C,HB_CPU3	; IF NOT, NOT POSSIBLE!
 	; SET CLOCK DIVIDE TO 1 RESULTING IN FULL XTAL SPEED
 	LD	A,$80
 	OUT0	(Z180_CCR),A
-	; HL ALREADY REFLECTS FULL SPEED OPERATION
+	; ADJUST HL TO REFLECT FULL SPEED OPERATION
+	SLA	L
+	RL	H
   #ENDIF
 ;
   #IF (Z180_CLKDIV >= 2)
@@ -2419,6 +2446,9 @@ HB_Z280BUS1:
 #ENDIF
 #IF (MEMMGR == MM_MBC)
 	.TEXT	"MBC$"
+#ENDIF
+#IF (MEMMGR == MM_RPH)
+	.TEXT	"RPH$"
 #ENDIF
 	CALL	PRTSTRD
 	.TEXT	" MMU$"
@@ -4072,19 +4102,33 @@ SYS_GETCPUSPD1:
 #ENDIF
 ;
 #IF (CPUFAM == CPU_Z180)
-	IN0	A,(Z180_CMR)		; GET CLOCK MULTIPLIER
-	RLCA				; ROTATE BIT TO BIT 0
-	AND	%00000001		; ISOLATE IT
-	LD	H,A			; SAVE IN H
+	LD	HL,0			; INIT CPU SPEED TO HALF
+	LD	A,(HB_CPUTYPE)		; LOAD CPUTYPE
+	CP	2			; S-CLASS OR ABOVE?
+	JR	C,SYS_GETCPUSPD1	; IF NOT, NO CCR/CMR
+;
+	; GET CCR BIT
 	IN0	A,(Z180_CCR)		; GET CLOCK CONTROL
 	RLCA				; ROTATE BIT TO BIT 0
 	AND	%00000001		; ISOLATE IT
 	LD	L,A			; SAVE IN L
+;
+	LD	A,(HB_CPUTYPE)		; LOAD CPUTYPE
+	CP	3			; REV. N?
+	JR	C,SYS_GETCPUSPD1	; IF NOT, NO CMR
+;
+	; GET CMR BIT
+	IN0	A,(Z180_CMR)		; GET CLOCK MULTIPLIER
+	RLCA				; ROTATE BIT TO BIT 0
+	AND	%00000001		; ISOLATE IT
+	LD	H,A			; SAVE IN H
+;
+SYS_GETCPUSPD1:
+	; CALC FINAL MULTIPLIER TO L
 	XOR	A			; CLEAR ACCUM
 	ADD	A,H			; ADD IN CMR BIT
 	ADD	A,L			; ADD IN CCR BIT
 	LD	L,A			; SAVE RESULT IN L
-;
 	; DCNTL = MMII????
 	IN0	A,(Z180_DCNTL)		; GET WAIT STATES
 	RLCA				; ROTATE MEM WS BITS
@@ -4348,6 +4392,29 @@ SYS_SETCPUSPD3:
 #ENDIF
 ;
 #IF (CPUFAM == CPU_Z180)
+	; VERIFY THAT REQUESTED SETTINGS ARE ALLOWED BY HARDWARE
+	LD	A,L			; GET SPEED REQUESTED
+	CP	$FF			; NO CHANGE?
+	JR	Z,SYS_SETCPUSPD0A	; SKIP CHECK
+	LD	A,(HB_CPUTYPE)		; 1=ORIG, 2=REVK, 3=REVN
+	INC	L			; 1=HALF,2=FULL,3=DOUBLE
+	CP	L			; TOO HIGH FOR CPU TYPE?
+	JP	C,SYS_SETCPUSPD_ERR	; CPU CAN'T DO SPD MULT
+	DEC	L			; RESTORE ORIG REQUEST
+SYS_SETCPUSPD0A:
+	LD	A,D			; MEM WS
+	CP	$FF			; NO CHANGE?
+	JR	Z,SYS_SETCPUSPD0B	; SKIP CHECK
+	CP	4			; TOO HIGH?
+	JP	NC,SYS_SETCPUSPD_ERR	; >3 IS TOO HIGH
+SYS_SETCPUSPD0B:
+	LD	A,D			; I/O WS
+	CP	$FF			; NO CHANGE?
+	JR	Z,SYS_SETCPUSPD0C	; SKIP CHECK
+	CP	4			; TOO HIGH?
+	JP	NC,SYS_SETCPUSPD_ERR	; >3 IS TOO HIGH
+SYS_SETCPUSPD0C:
+;
 	PUSH	DE			; SAVE WAIT STATES FOR NOW
 	; BEFORE IMPLEMENTING THE NEW CPU SPEED, WE SWITCH THE
 	; WAIT STATES TO MAXIMUM BECAUSE WE MAY BE IMPLEMENTING
@@ -4374,11 +4441,11 @@ SYS_SETCPUSPD1:
 	LD	C,%10000000		; SET CCR BIT
 SYS_SETCPUSPD2:
 ;
+	; IMPLEMENT THE NEW CPU SPEED
 	IN0	A,(Z180_CMR)
 	AND	~%10000000
 	OR	B
 	OUT0	(Z180_CMR),A
-;
 	IN0	A,(Z180_CCR)
 	AND	~%10000000
 	OR	C
diff --git a/Source/HBIOS/hbios.inc b/Source/HBIOS/hbios.inc
index 6168ec24..bce5c5ff 100644
--- a/Source/HBIOS/hbios.inc
+++ b/Source/HBIOS/hbios.inc
@@ -136,6 +136,7 @@ PLT_SCZ180	.EQU	10		; SCZ180
 PLT_DYNO	.EQU	11		; DYNO MICRO-ATX MOTHERBOARD
 PLT_RCZ280	.EQU	12		; RC2014 W/ Z280
 PLT_MBC		.EQU	13		; MULTI BOARD COMPUTER
+PLT_RPH		.EQU	14		; RHYOPHYRE GRAPHICS COMPUTER
 ;
 ; HBIOS GLOBAL ERROR RETURN VALUES
 ;
diff --git a/Source/HBIOS/std.asm b/Source/HBIOS/std.asm
index aa9b12b4..3b51c666 100644
--- a/Source/HBIOS/std.asm
+++ b/Source/HBIOS/std.asm
@@ -15,6 +15,7 @@
 ; 11. DYNO	Steve Garcia's Dyno Micro-ATX Motherboard
 ; 12. RCZ280	Z280 CPU on RC2014 or ZZ80MB
 ; 13. MBC	Andrew Lynch's Multi Board Computer
+; 14. RPH	Andrew Lynch's RHYOPHYRE Graphics Computer
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;
@@ -70,6 +71,7 @@ MM_Z180		.EQU	4		; Z180 NATIVE MEMORY MANAGER
 MM_Z280		.EQU	5		; Z280 NATIVE MEMORY MANAGER
 MM_ZRC		.EQU	6		; ZRC BANK SWITCHING
 MM_MBC		.EQU	7		; MBC MEMORY MANAGER
+MM_RPH		.EQU	8		; Z180 WITH RPH EXTENSIONS
 ;
 ; BOOT STYLE
 ;
@@ -170,6 +172,7 @@ PPIDEMODE_MFP	.EQU	3		; MULTIFUNCTION / PIC
 PPIDEMODE_N8	.EQU	4		; MULTIFUNCTION / PIC
 PPIDEMODE_RC	.EQU	5		; RC2014 PPIDE MODULE @ $20 (ED BRINDLEY)
 PPIDEMODE_DYNO	.EQU	6		; DYNO PPIDE @ $4C
+PPIDEMODE_RPH	.EQU	7		; RHYOPHYRE (RPH)
 ;
 ; SD MODE SELECTIONS
 ;
diff --git a/Source/ver.inc b/Source/ver.inc
index c8a6de03..a7451543 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	1
 #DEFINE	RUP	1
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.1.1-pre.165"
+#DEFINE BIOSVER	"3.1.1-pre.168"
diff --git a/Source/ver.lib b/Source/ver.lib
index 92cf12c1..dc0185e8 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	1
 rup	equ	1
 rtp	equ	0
 biosver	macro
-	db	"3.1.1-pre.165"
+	db	"3.1.1-pre.168"
 	endm