diff --git a/Source/HBIOS/cfg_dyno.asm b/Source/HBIOS/cfg_dyno.asm
index f9de87ae..6c513e3e 100644
--- a/Source/HBIOS/cfg_dyno.asm
+++ b/Source/HBIOS/cfg_dyno.asm
@@ -65,6 +65,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_ezz80.asm b/Source/HBIOS/cfg_ezz80.asm
index 77bf5c87..e4559c0d 100644
--- a/Source/HBIOS/cfg_ezz80.asm
+++ b/Source/HBIOS/cfg_ezz80.asm
@@ -67,6 +67,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_master.asm b/Source/HBIOS/cfg_master.asm
index 370a70ba..b202f09c 100644
--- a/Source/HBIOS/cfg_master.asm
+++ b/Source/HBIOS/cfg_master.asm
@@ -92,6 +92,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_mk4.asm b/Source/HBIOS/cfg_mk4.asm
index 4427c1db..32f611b3 100644
--- a/Source/HBIOS/cfg_mk4.asm
+++ b/Source/HBIOS/cfg_mk4.asm
@@ -68,6 +68,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_n8.asm b/Source/HBIOS/cfg_n8.asm
index 0401c625..0e2e49b8 100644
--- a/Source/HBIOS/cfg_n8.asm
+++ b/Source/HBIOS/cfg_n8.asm
@@ -71,6 +71,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_rcz180.asm b/Source/HBIOS/cfg_rcz180.asm
index 2904ee88..4e182511 100644
--- a/Source/HBIOS/cfg_rcz180.asm
+++ b/Source/HBIOS/cfg_rcz180.asm
@@ -68,6 +68,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_rcz280.asm b/Source/HBIOS/cfg_rcz280.asm
index 97b04ec7..b2bbbe68 100644
--- a/Source/HBIOS/cfg_rcz280.asm
+++ b/Source/HBIOS/cfg_rcz280.asm
@@ -73,6 +73,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_rcz80.asm b/Source/HBIOS/cfg_rcz80.asm
index 138ca616..88eb0531 100644
--- a/Source/HBIOS/cfg_rcz80.asm
+++ b/Source/HBIOS/cfg_rcz80.asm
@@ -68,6 +68,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_sbc.asm b/Source/HBIOS/cfg_sbc.asm
index 0ccbbd77..fbdc125b 100644
--- a/Source/HBIOS/cfg_sbc.asm
+++ b/Source/HBIOS/cfg_sbc.asm
@@ -64,6 +64,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_scz180.asm b/Source/HBIOS/cfg_scz180.asm
index 31d19c69..96c87a87 100644
--- a/Source/HBIOS/cfg_scz180.asm
+++ b/Source/HBIOS/cfg_scz180.asm
@@ -63,6 +63,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_zeta.asm b/Source/HBIOS/cfg_zeta.asm
index 86c283a9..1eda52df 100644
--- a/Source/HBIOS/cfg_zeta.asm
+++ b/Source/HBIOS/cfg_zeta.asm
@@ -56,6 +56,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/cfg_zeta2.asm b/Source/HBIOS/cfg_zeta2.asm
index 0e5f226c..44783270 100644
--- a/Source/HBIOS/cfg_zeta2.asm
+++ b/Source/HBIOS/cfg_zeta2.asm
@@ -67,6 +67,7 @@ LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
 DSKYENABLE	.EQU	FALSE		; ENABLES DSKY (DO NOT COMBINE WITH PPIDE)
 ;
+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)
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index ebe0a658..5430fdc5 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -756,6 +756,12 @@ INT_IM1:
 HBX_INT:	; COMMON INTERRUPT ROUTING CODE
 ;
   #IF (MEMMGR == MM_Z280)
+;
+; THIS CODE ASSUMES Z280 IM 3.  IM 1 AND IM 2 ON Z280
+; DO NOT SAVE MSR AT INTERRUPT MAKING IT VIRTUALLY IMPOSSIBLE
+; TO RETURN FROM THE INTERRUPT TO THE CORRECT MODE (SYSTEM
+; OR USER).  THIS IS BECAUSE THERE IS NO WAY TO KNOW WHETHER
+; SYSTEM OR USER MODE WAS ACTIVE AT THE TIME OF THE INTERRUPT.
 ;
 	EX	(SP),HL			; SAVE HL AND GET INT JP TABLE OFFSET
 	
@@ -1097,9 +1103,9 @@ Z280_INITZ:
 	; SET DEFAULT CPU CLOCK MULTIPLIERS (XTAL / 2)
 	;
 	; IT HAS BEEN REPORTED THAT CMR NEEDS TO BE SET PRIOR TO CCR
-	; SEEMS COUNTER-INTUITIVE AND I NEVER EXPERIENCED A PROBLEM
-	; RELATED TO ORDER, BUT JUST FOR GOOD MEASURE, CMR
-	; IS SET PRIOR TO CCR BELOW.
+	; WHEN USING AN INPUT FREQUENCY THAT IS XTAL / 2.
+	; I NEVER EXPERIENCED A PROBLEM RELATED TO ORDER, BUT JUST
+	; FOR GOOD MEASURE, CMR IS SET PRIOR TO CCR BELOW.
 	; https://www.retrobrewcomputers.org/forum/index.php?t=msg&th=316&#msg_5045
 	XOR	A
 	OUT0	(Z180_CMR),A
@@ -1610,7 +1616,7 @@ HB_CPU2:
 ;
 #IF (CPUFAM == CPU_Z280)
 ;
-  #IF (INTMODE == 3)
+  #IF (MEMMGR == MM_Z280)
 ;
 Z280_TC	.EQU	CPUOSC / 4 / 50 / 2	; TIME CONSTANT
 ;
@@ -1668,26 +1674,9 @@ Z280_TC	.EQU	CPUOSC / 4 / 50 / 2	; TIME CONSTANT
 ;
 ; PRE-CONSOLE INITIALIZATION
 ;
-	LD	A,FORCECON		; CALCULATE PRE-INIT TABLE		; A IS INDEX OF CONSOLE DEVICE ENTRY
-	RLCA				; ENTRY THAT WE WANT TO			; A IS OFFSET OF CONSOLE DEVICE ENTRY
-	LD	DE,(HB_PCINITTBL)	; EXECUTE FIRST				; DE IS VALUE OF TOP ENTRY
-	LD	HL,HB_PCINITTBL							; HL IS ADDRESS OF TOP OF TABLE
-	PUSH	HL								; PUSH (1) TOP OF TABLE
-	PUSH	DE								; PUSH (2) VALUE OF TOP ENTRY
-	PUSH	HL								; PUSH (3) TOP OF TABLE
-	CALL	ADDHLA								; HL IS ADDRESS OF DESIRED CONSOLE ENTRY
-	POP	DE			; PLACE IT AT THE TOP OF THE		; POP (3) DE IS TOP OF TABLE
-	PUSH	HL			; TABLE BY SWAPPING IT			; PUSH (3) ADDRESS OF DESIRED CONSOLE ENTRY
-	LDI				; WITH THE FIRST (DUMMY)		; COPY DESIRED ENTRY
-	LDI				; ENTRY					; ... TO TOP OF TABLE
-	POP	HL								; POP (3) HL IS ADDRESS OF DESIRED CONSOLE ENTRY
-	POP	DE								; POP (2) DE IS VALUE OF ORIGINAL TOP ENTRY
-	LD	(HL),E								; SAVE DE OVER ORIGINAL ENTRY
-	INC	HL
-	LD	(HL),D
-	LD	B,HB_PCINITTBLLEN
-	POP	DE								; POP (1) DE IS ADDRESS OF TOP OF TABLE
-
+	LD	DE,HB_PCINITTBL		; POINT TO PRECONSOLE INIT TABLE
+	LD	B,HB_PCINITTBLLEN	; NUMBER OF ENTRIES
+;
 #IF (BT_REC_TYPE != BT_REC_NONE)
 	LD	A,(HB_BOOT_REC)		; IF WE ARE IN RECOVERY MODE
 	OR	A			; POINT TO THE RECOVER MODE
@@ -1695,7 +1684,7 @@ Z280_TC	.EQU	CPUOSC / 4 / 50 / 2	; TIME CONSTANT
 	LD	B,HB_PCINITRLEN
 	LD	DE,HB_PCINIT_REC
 NOT_REC_M0:
-
+;
 #ENDIF
 	CALL	CALLLIST							; PROCESS THE PRE-INIT CALL TABLE
 ;
@@ -1717,8 +1706,15 @@ NOT_REC_M0:
 ; NOW THAT HBIOS IS READY, SET THE CONSOLE UNIT TO ACTIVATE CONSOLE I/O
 ; VIA HBIOS.
 ;
-	XOR	A			; INITIALLY, FIRST SERIAL UNIT IS CONSOLE
-	LD	(CB_CONDEV),A		; SAVE IT, ACTIVATES CONSOLE ON HBIOS
+	XOR	A			; FAILSAFE VALUE FOR BOOT CONSOLE DEVICE
+	LD	(CB_CONDEV),A		; SAVE IT
+;	
+	LD	A,(CIO_CNT)		; GET COUNT OF CHAR DEVICES
+	CP	BOOTCON	+ 1		; COUNT - (DEVICE + 1)
+	JR	C,HB_CONRDY		; IF TOO HIGH, JUST USE FAILSAFE
+	LD	A,BOOTCON		; GET REQUESTED CONSOLE DEV
+	LD	(CB_CONDEV),A		; SAVE IT
+HB_CONRDY:
 
 #IF (WBWDEBUG == USEMIO)		; OUTPUT ANY CACHED DEBUG TEXT
 	LD	HL,MIOOUTPTR
@@ -2179,7 +2175,6 @@ HB_INITRLEN	.EQU	(($ - HB_INIT_REC) / 2)
 ;==================================================================================================
 ;
 HB_PCINITTBL:
-	.DW	CALLDUMMY	; RESERVED FOR FORCING PRIMARY CONSOLE
 #IF (ASCIENABLE)
 	.DW	ASCI_PREINIT
 #ENDIF
@@ -4199,6 +4194,11 @@ Z280_IVT:
 ; REGISTERS AF, BC, HL DESTROYED
 ;
 Z280_BNKSEL:
+	; *DEBUG*
+	;CALL	PC_LBKT
+	;CALL	PRTHEXBYTE
+	;CALL	PC_RBKT
+
 	; SELECT I/O PAGE $FE (SAVING PREVIOUS VALUE)
 	LD	C,Z280_IOPR		; REG C POINTS TO I/O PAGE REGISTER
 	LDCTL	HL,(C)			; GET CURRENT I/O PAGE
diff --git a/Source/HBIOS/std.asm b/Source/HBIOS/std.asm
index ded5a73b..b4f0fe6b 100644
--- a/Source/HBIOS/std.asm
+++ b/Source/HBIOS/std.asm
@@ -353,13 +353,6 @@ WDOG_NONE	.EQU	0		; NONE
 WDOG_EZZ80	.EQU	1		; EASY Z80 WATCHDOG
 WDOG_SKZ	.EQU	2		; SK Z80 CPU W/ 512K
 ;
-; DEVICE DRIVER TO BE INITIALIZED FIRST. FIRST CIO DRIVER, UNIT 0 INITIALIZED BECOMES PRIMARY CONSOLE.
-; IS AN INDEX INTO THE ENABLED INITIALIZATION DRIVER LIST i.e. ASCI, UART, SIO, ACIA, PIO, UF ETC.
-; EXAMPLE: IF ONLY UART, SIO AND PIO ARE ENABLE AND THE SIO IS DESIRED AS THE PRIMARY CONSOLE,
-; SET FORCECON TO 2 IN YOUR CUSTOM CONFIGURATION FILE i.e. "FORCECON: .SET 2"
-;
-FORCECON	.EQU	0	; DEFAULT IS TO FOLLOW NORMAL SEQUENCE
-;
 #INCLUDE "build.inc"		; INCLUDE USER CONFIG, ADD VARIANT, TIMESTAMP, & ROMSIZE
 ;
 #IF (BIOS == BIOS_WBW)
@@ -414,6 +407,7 @@ TM_CTC	.EQU	1
 TM_TMS	.EQU	2
 TM_SIMH	.EQU	3
 TM_Z180	.EQU	4
+TM_Z280	.EQU	5
 ;
 	.ECHO "SYSTEM TIMER:"
 SYSTIM	.EQU	TM_NONE
@@ -443,6 +437,11 @@ SYSTIM	.SET	TM_SIMH
 SYSTIM	.SET	TM_Z180
 	.ECHO	" Z180"
   #ENDIF
+;
+  #IF ((CPUFAM == CPU_Z280) & (MEMMGR == MM_Z280))
+SYSTIM	.SET	TM_Z280
+	.ECHO	" Z280"
+  #ENDIF
 ;
   #IF SYSTIM == TM_NONE
 	.ECHO " NONE"
diff --git a/Source/ver.inc b/Source/ver.inc
index 461938fc..0e2b5687 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.54"
+#DEFINE BIOSVER	"3.1.1-pre.55"
diff --git a/Source/ver.lib b/Source/ver.lib
index 5d2784e1..8e71dfa2 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.54"
+	db	"3.1.1-pre.55"
 	endm