diff --git a/Doc/RomWBW Applications.pdf b/Doc/RomWBW Applications.pdf
index f6ac8199..e24171c4 100644
Binary files a/Doc/RomWBW Applications.pdf and b/Doc/RomWBW Applications.pdf differ
diff --git a/Doc/RomWBW Disk Catalog.pdf b/Doc/RomWBW Disk Catalog.pdf
index 3869c8c7..9d9afff3 100644
Binary files a/Doc/RomWBW Disk Catalog.pdf and b/Doc/RomWBW Disk Catalog.pdf differ
diff --git a/Doc/RomWBW Errata.pdf b/Doc/RomWBW Errata.pdf
index 9704e02d..9e2d3491 100644
Binary files a/Doc/RomWBW Errata.pdf and b/Doc/RomWBW Errata.pdf differ
diff --git a/Doc/RomWBW ROM Applications.pdf b/Doc/RomWBW ROM Applications.pdf
index 07b31fde..12f702d6 100644
Binary files a/Doc/RomWBW ROM Applications.pdf and b/Doc/RomWBW ROM Applications.pdf differ
diff --git a/Doc/RomWBW System Guide.pdf b/Doc/RomWBW System Guide.pdf
index f9133b3d..42bf05e3 100644
Binary files a/Doc/RomWBW System Guide.pdf and b/Doc/RomWBW System Guide.pdf differ
diff --git a/Doc/RomWBW User Guide.pdf b/Doc/RomWBW User Guide.pdf
index 469dc285..66812307 100644
Binary files a/Doc/RomWBW User Guide.pdf and b/Doc/RomWBW User Guide.pdf differ
diff --git a/ReadMe.md b/ReadMe.md
index 33af1723..ab035b5b 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -3,7 +3,7 @@
 **RomWBW ReadMe** \
 Version 3.5 \
 Wayne Warthen  ([wwarthen@gmail.com](mailto:wwarthen@gmail.com)) \
-28 Feb 2024
+03 Apr 2024
 
 # Overview
 
diff --git a/ReadMe.txt b/ReadMe.txt
index abb1597b..c47f3d10 100644
--- a/ReadMe.txt
+++ b/ReadMe.txt
@@ -1,6 +1,6 @@
 RomWBW ReadMe
 Wayne Warthen (wwarthen@gmail.com)
-28 Feb 2024
+03 Apr 2024
 
 
 
diff --git a/Source/Doc/SystemGuide.md b/Source/Doc/SystemGuide.md
index 7e1d9e91..c9cdb2ea 100644
--- a/Source/Doc/SystemGuide.md
+++ b/Source/Doc/SystemGuide.md
@@ -1327,7 +1327,7 @@ specified (set to 0 for default/not specified). Video Mode (E) values
 are specific to each VDA.  The returned Status (A) is a standard HBIOS 
 result code.
 
-If the hardware and driver support it, you can specify a Font Bitmap 
+If the hardware and driver supports it, you can specify a Font Bitmap 
 (HL) buffer address containing the character bitmap data to be loaded 
 into the video processor.  The buffer **must** be located entirely in the 
 top 32K of the CPU memory space. HL must be set to zero if no character 
@@ -1372,10 +1372,10 @@ data, then Font Bitmap (HL) will be set to zero on return.
 | B: 0x42                                | A: Status                              |
 | C: Video Unit                          |                                        |
 
-Performs a soft reset of the specified Video Unit (C). Will clear the 
-screen, home the cursor, and restore active attribute/color to defaults.
-Keyboard will be flushed.  The current video mode will not be changed. 
-The returned Status (A) is a standard HBIOS result code.
+Performs a non-destructive reset of the specified Video Unit (C).  
+Should re-initialize the video hardware without destroying the screen 
+contents or cursor position.  The current video mode will not be 
+changed. The returned Status (A) is a standard HBIOS result code.
 
 ### Function 0x43 -- Video Device (VDADEV)
 
diff --git a/Source/Doc/UserGuide.md b/Source/Doc/UserGuide.md
index 231a7154..21084d99 100644
--- a/Source/Doc/UserGuide.md
+++ b/Source/Doc/UserGuide.md
@@ -5680,6 +5680,16 @@ S- MD: TYPE=RAM
 
 ##### Notes:
 
+- Z180 SBC SW2 (IOBYTE) Dip Switches:
+
+| Bit | Setting | Function                            |
+|-----|---------|-------------------------------------|
+| 0   | Off     | Use Z180 ASCI Channel A for console |
+|     | On      | Use Propeller Console               |
+|     |         |                                     |
+| 1   | Off     | Boot to RomWBW Boot Loader          |
+|     | On      | Boot to S100 Monitor                |
+
 `\clearpage`{=latex}
 
 ### Duodyne Z80 System
diff --git a/Source/HBIOS/cfg_duo.asm b/Source/HBIOS/cfg_duo.asm
index 2019aa05..4decaa5c 100644
--- a/Source/HBIOS/cfg_duo.asm
+++ b/Source/HBIOS/cfg_duo.asm
@@ -105,7 +105,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_dyno.asm b/Source/HBIOS/cfg_dyno.asm
index 7aa27a74..6656ea5f 100644
--- a/Source/HBIOS/cfg_dyno.asm
+++ b/Source/HBIOS/cfg_dyno.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 MKYKBLOUT	.EQU	KBD_US		; KBD KEYBOARD LANGUAGE: KBD_[US|DE]
 ;
 DSRTCENABLE	.EQU	FALSE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
-DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_epitx.asm b/Source/HBIOS/cfg_epitx.asm
index 59a8be6a..5d90150d 100644
--- a/Source/HBIOS/cfg_epitx.asm
+++ b/Source/HBIOS/cfg_epitx.asm
@@ -109,7 +109,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 MKYKBLOUT	.EQU	KBD_US		; KBD KEYBOARD LANGUAGE: KBD_[US|DE]
 ;
 DSRTCENABLE	.EQU	FALSE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
-DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_heath.asm b/Source/HBIOS/cfg_heath.asm
index 7b8892d7..00d163db 100644
--- a/Source/HBIOS/cfg_heath.asm
+++ b/Source/HBIOS/cfg_heath.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_master.asm b/Source/HBIOS/cfg_master.asm
index ffa67e56..b46f54b9 100644
--- a/Source/HBIOS/cfg_master.asm
+++ b/Source/HBIOS/cfg_master.asm
@@ -136,7 +136,7 @@ MKYENABLE	.EQU	FALSE		; MSX 8255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 MKYKBLOUT	.EQU	KBD_US		; KBD KEYBOARD LANGUAGE: KBD_[US|DE]
 ;
 DSRTCENABLE	.EQU	FALSE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
-DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_mbc.asm b/Source/HBIOS/cfg_mbc.asm
index 42a0eaaa..2bcd96fc 100644
--- a/Source/HBIOS/cfg_mbc.asm
+++ b/Source/HBIOS/cfg_mbc.asm
@@ -102,7 +102,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_mk4.asm b/Source/HBIOS/cfg_mk4.asm
index a5388211..7af0fbd0 100644
--- a/Source/HBIOS/cfg_mk4.asm
+++ b/Source/HBIOS/cfg_mk4.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_mon.asm b/Source/HBIOS/cfg_mon.asm
index 46d2b23d..1da15079 100644
--- a/Source/HBIOS/cfg_mon.asm
+++ b/Source/HBIOS/cfg_mon.asm
@@ -102,7 +102,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 MKYKBLOUT	.EQU	KBD_US		; KBD KEYBOARD LANGUAGE: KBD_[US|DE]
 ;
 DSRTCENABLE	.EQU	FALSE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
-DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_n8.asm b/Source/HBIOS/cfg_n8.asm
index 508fd8ff..aa5ac163 100644
--- a/Source/HBIOS/cfg_n8.asm
+++ b/Source/HBIOS/cfg_n8.asm
@@ -109,7 +109,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_rcz180.asm b/Source/HBIOS/cfg_rcz180.asm
index 2c02052b..d101a777 100644
--- a/Source/HBIOS/cfg_rcz180.asm
+++ b/Source/HBIOS/cfg_rcz180.asm
@@ -113,7 +113,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_rcz280.asm b/Source/HBIOS/cfg_rcz280.asm
index 2817b7fa..dbd5c5e1 100644
--- a/Source/HBIOS/cfg_rcz280.asm
+++ b/Source/HBIOS/cfg_rcz280.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_rcz80.asm b/Source/HBIOS/cfg_rcz80.asm
index b0ac1456..4979501c 100644
--- a/Source/HBIOS/cfg_rcz80.asm
+++ b/Source/HBIOS/cfg_rcz80.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_rph.asm b/Source/HBIOS/cfg_rph.asm
index 5ed992b7..cf81334f 100644
--- a/Source/HBIOS/cfg_rph.asm
+++ b/Source/HBIOS/cfg_rph.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_s100.asm b/Source/HBIOS/cfg_s100.asm
index cd424184..ed5e3feb 100644
--- a/Source/HBIOS/cfg_s100.asm
+++ b/Source/HBIOS/cfg_s100.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_sbc.asm b/Source/HBIOS/cfg_sbc.asm
index 40fe08f0..fcb8b975 100644
--- a/Source/HBIOS/cfg_sbc.asm
+++ b/Source/HBIOS/cfg_sbc.asm
@@ -102,7 +102,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_scz180.asm b/Source/HBIOS/cfg_scz180.asm
index 794354ca..f98705cf 100644
--- a/Source/HBIOS/cfg_scz180.asm
+++ b/Source/HBIOS/cfg_scz180.asm
@@ -107,7 +107,7 @@ MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VD
 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]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_z80retro.asm b/Source/HBIOS/cfg_z80retro.asm
index 6dc541aa..d3176ae0 100644
--- a/Source/HBIOS/cfg_z80retro.asm
+++ b/Source/HBIOS/cfg_z80retro.asm
@@ -100,7 +100,7 @@ ANSITRACE	.EQU	1		; ANSI DRIVER TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VDA DRIVER)
 ;
 DSRTCENABLE	.EQU	FALSE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
-DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_zeta.asm b/Source/HBIOS/cfg_zeta.asm
index 9bda4cb0..0231e647 100644
--- a/Source/HBIOS/cfg_zeta.asm
+++ b/Source/HBIOS/cfg_zeta.asm
@@ -89,7 +89,7 @@ ANSITRACE	.EQU	1		; ANSI DRIVER TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VDA DRIVER)
 ;
 DSRTCENABLE	.EQU	TRUE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
-DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cfg_zeta2.asm b/Source/HBIOS/cfg_zeta2.asm
index 39c675e9..4369f1b4 100644
--- a/Source/HBIOS/cfg_zeta2.asm
+++ b/Source/HBIOS/cfg_zeta2.asm
@@ -100,7 +100,7 @@ ANSITRACE	.EQU	1		; ANSI DRIVER TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 MKYENABLE	.EQU	FALSE		; MSX 5255 PPI KEYBOARD COMPATIBLE DRIVER (REQUIRES TMS VDA DRIVER)
 ;
 DSRTCENABLE	.EQU	TRUE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
-DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC]
+DSRTCMODE	.EQU	DSRTCMODE_STD	; DSRTC: OPERATING MODE: DSRTC_[STD|MFPIC|K80W]
 DSRTCCHG	.EQU	FALSE		; DSRTC: FORCE BATTERY CHARGE ON (USE WITH CAUTION!!!)
 ;
 DS1501RTCENABLE	.EQU	FALSE		; DS1501RTC: ENABLE DS-1501 CLOCK DRIVER (DS1501RTC.ASM)
diff --git a/Source/HBIOS/cvdu.asm b/Source/HBIOS/cvdu.asm
index 8abe5eb6..adbe84c9 100644
--- a/Source/HBIOS/cvdu.asm
+++ b/Source/HBIOS/cvdu.asm
@@ -148,6 +148,15 @@ CVDU_VDAINI:
 	; RESET VDA
 	; CURRENTLY IGNORES VIDEO MODE AND BITMAP DATA
 	CALL	CVDU_VDARES		; RESET VDA
+	LD	A,$0E			; ATTRIBUTE IS STANDARD WHITE ON BLACK
+	LD	(CVDU_ATTR),A		; SAVE IT
+	LD	DE,0			; ROW = 0, COL = 0
+	CALL	CVDU_XY			; SEND CURSOR TO TOP LEFT
+	LD	A,' '			; BLANK THE SCREEN
+	LD	DE,$800			; FILL ENTIRE BUFFER
+	CALL	CVDU_FILL		; DO IT
+	LD	DE,0			; ROW = 0, COL = 0
+	CALL	CVDU_XY			; SEND CURSOR TO TOP LEFT
 	XOR	A			; SIGNAL SUCCESS
 	RET
 
@@ -160,17 +169,6 @@ CVDU_VDAQRY:
 	RET
 
 CVDU_VDARES:
-	LD	A,$0E			; ATTRIBUTE IS STANDARD WHITE ON BLACK
-	LD	(CVDU_ATTR),A		; SAVE IT
-
-	LD	DE,0			; ROW = 0, COL = 0
-	CALL	CVDU_XY			; SEND CURSOR TO TOP LEFT
-	LD	A,' '			; BLANK THE SCREEN
-	LD	DE,$800			; FILL ENTIRE BUFFER
-	CALL	CVDU_FILL		; DO IT
-	LD	DE,0			; ROW = 0, COL = 0
-	CALL	CVDU_XY			; SEND CURSOR TO TOP LEFT
-
 	XOR	A
 	RET
 
diff --git a/Source/HBIOS/dsrtc.asm b/Source/HBIOS/dsrtc.asm
index 7df87f28..0f20b987 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	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	RTC_IN
+; BIT	SBC	RCBUS	SBC-004	MFPIC	K80W  	N8	N8-CSIO	MK4	SC130	SC131	SC126		MBC	RPH
+; -----	-------	-------	-------	-------	-------	-------	-------	-------	-------	-------	---------------	------- -------
+; D7	RTC_OUT 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	RTC_CLK
+; D5	/RTC_WE /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	RTC_CE
+; D3	NC	NC	CLKSEL	/RTC_CE	/RTC_CE	NC	NC	NC	--	--	/SPI_CS2	CLKSEL	--
+; D2	NC	NC	SPK	RTC_CLK	RTC_CLK	SPI_CS	SPI_CS	NC	/SPI_CS1/SPI_CS1/SPI_CS1	SPK	--
+; D1	--	--	--	RTC_WE	RTC_WE	SPI_CLK	NC	NC	--	--	FS		LED1	--
+; D0	--	--	--	RTC_OUT	RTC_OUT	SPI_DI	NC	NC	--	--	I2C_SCL		LED0	--
+;
+; RTC LATCH READTCH 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	--	--	RTC_IN		RTC_IN	RTC_IN
 ;
 	.ECHO	"DSRTC: MODE="
 ;
@@ -106,15 +106,6 @@ DSRTC_IDLE	.EQU	%00100000	; QUIESCENT STATE
 RTCDEF		.SET	RTCDEF | DSRTC_IDLE	; FOR HBIOS MAINLINE
 ;
 #DEFINE	DSRTC_OPRVAL	HB_RTCVAL
-;
-; VALUES FOR DIFFERENT BATTERY OR SUPERCAPACITOR CHARGE RATES
-;
-DS1d2k		.EQU	%10100101	; 1 DIODE 2K RESISTOR (DEFAULT)
-DS1d4k		.EQU	%10100110	; 1 DIODE 4K RESISTOR
-DS1d8k		.EQU	%10100111	; 1 DOIDE 8K RESISTOR
-DS2d2k		.EQU	%10101001	; 2 DIODES 2K RESISTOR
-DS2d4k		.EQU	%10101010	; 2 DIODES 4K RESISTOR
-DS2d8k		.EQU	%10101011	; 2 DIODES 8K RESISTOR
 ;
 		.ECHO	"STD"
 ;
@@ -137,11 +128,38 @@ DSRTC_IDLE	.EQU	%00001000	; QUIESCENT STATE
 		.ECHO	"MFPIC"
 ;
 #ENDIF
+;
+#IF (DSRTCMODE == DSRTCMODE_K80W)
+;
+DSRTC_IO	.EQU	RTCIO		; RTC PORT
+;
+DSRTC_DATA	.EQU	%00000001	; BIT 0 IS RTC DATA OUT
+DSRTC_CLK	.EQU	%00000100	; BIT 2 IS RTC CLOCK (CLK)
+DSRTC_WR	.EQU	%00000010	; BIT 1 IS DATA DIRECTION (WE)
+DSRTC_CE	.EQU	%00001000	; BIT 3 CHIP ENABLE (/CE)
+;
+DSRTC_MASK	.EQU	%00001111	; MASK FOR BITS WE OWN IN RTC LATCH PORT
+DSRTC_IDLE	.EQU	%00001000	; QUIESCENT STATE
+;
+#DEFINE	DSRTC_OPRVAL	HB_RTCVAL
+;
+		.ECHO	"K80W"
+;
+#ENDIF
 ;
 		.ECHO	", IO="
 		.ECHO	DSRTC_IO
 		.ECHO	"\n"
 ;
+; VALUES FOR DIFFERENT BATTERY OR SUPERCAPACITOR CHARGE RATES
+;
+DS1d2k		.EQU	%10100101	; 1 DIODE 2K RESISTOR (DEFAULT)
+DS1d4k		.EQU	%10100110	; 1 DIODE 4K RESISTOR
+DS1d8k		.EQU	%10100111	; 1 DOIDE 8K RESISTOR
+DS2d2k		.EQU	%10101001	; 2 DIODES 2K RESISTOR
+DS2d4k		.EQU	%10101010	; 2 DIODES 4K RESISTOR
+DS2d8k		.EQU	%10101011	; 2 DIODES 8K RESISTOR
+;
 DSRTC_BUFSIZ	.EQU	7		; 7 BYTE BUFFER (YYMMDDHHMMSSWW)
 ;
 ; RTC DEVICE PRE-INITIALIZATION ENTRY
@@ -190,6 +208,9 @@ DSRTC_INIT:
 #IF (DSRTCMODE == DSRTCMODE_MFPIC)
 	PRTS("MFPIC$")
 #ENDIF
+#IF (DSRTCMODE == DSRTCMODE_K80W)
+	PRTS("K80W$")
+#ENDIF
 ;
 	; PRINT RTC LATCH PORT ADDRESS
 	PRTS(" IO=0x$")			; LABEL FOR IO ADDRESS
@@ -598,7 +619,7 @@ DSRTC_CMD:
 	LD	A,(DSRTC_OPRVAL)	; INIT A WITH QUIESCENT STATE
 	OUT	(DSRTC_IO),A		; WRITE TO PORT
 	CALL	DLY2			; DELAY 2 * 27 T-STATES
-#IF (DSRTCMODE == DSRTCMODE_MFPIC)
+#IF ((DSRTCMODE == DSRTCMODE_MFPIC) | (DSRTCMODE == DSRTCMODE_K80W))
 	AND	~DSRTC_CE		; ASSERT CE (LOW)
 #ELSE
 	OR	DSRTC_CE		; ASSERT CE (HIGH)
@@ -624,7 +645,7 @@ DSRTC_CMD:
 ;
 DSRTC_PUT:
 	LD	B,8			; LOOP FOR 8 BITS
-#IF (DSRTCMODE == DSRTCMODE_MFPIC)
+#IF ((DSRTCMODE == DSRTCMODE_MFPIC) | (DSRTCMODE == DSRTCMODE_K80W))
 	OR	DSRTC_WR		; SET WRITE MODE
 #ELSE
 	AND	~DSRTC_RD		; SET WRITE MODE
@@ -634,7 +655,7 @@ DSRTC_PUT1:
 	OUT	(DSRTC_IO),A		; DO IT
 	CALL	DLY1			; DELAY 27 T-STATES
 
-#IF (DSRTCMODE == DSRTCMODE_MFPIC)
+#IF ((DSRTCMODE == DSRTCMODE_MFPIC) | (DSRTCMODE == DSRTCMODE_K80W))
 	RRA				; PREP ACCUM TO GET DATA BIT IN CARRY
 	RR	E			; ROTATE NEXT BIT TO SEND INTO CARRY
 	RLA				; ROTATE BITS BACK TO CORRECT POSTIIONS
@@ -667,7 +688,7 @@ DSRTC_PUT1:
 DSRTC_GET:
 	LD	E,0			; INITIALIZE WORKING VALUE TO 0
 	LD	B,8			; LOOP FOR 8 BITS
-#IF (DSRTCMODE == DSRTCMODE_MFPIC)
+#IF ((DSRTCMODE == DSRTCMODE_MFPIC) | (DSRTCMODE == DSRTCMODE_K80W))
 	AND	~DSRTC_WR		; SET READ MODE
 #ELSE
 	OR	DSRTC_RD		; SET READ MODE
@@ -724,7 +745,7 @@ DSRTC_END:
 DSRTC_STAT	.DB	0		; DEVICE STATUS (0=OK)
 DSRTC_TEMP	.DB	0		; TEMP VALUE STORAGE
 ;
-#IF (DSRTCMODE == DSRTCMODE_MFPIC)
+#IF ((DSRTCMODE == DSRTCMODE_MFPIC) | (DSRTCMODE == DSRTCMODE_K80W))
 DSRTC_RTCVAL	.DB	DSRTC_IDLE	; LOCAL LATCH SHADOW FOR MFPIC
 #ENDIF
 ;
diff --git a/Source/HBIOS/ef.asm b/Source/HBIOS/ef.asm
index 8a7e6db3..9d6228f3 100644
--- a/Source/HBIOS/ef.asm
+++ b/Source/HBIOS/ef.asm
@@ -570,6 +570,13 @@ EF_VDAINI:
 	LD	A,L
 	OR	H
 	CALL	NZ,EF_LOADFONTS
+
+	CALL	EF_CLEARALL
+	CALL	EF_LOADCSTYLE
+	LD	DE,0
+	LD	(EF_VDA_OFFSET),DE
+	CALL	EF_VDASCP
+
 	XOR	A
 	RET
 ;
@@ -586,13 +593,8 @@ EF_VDAQRY:
 ;
 EF_VDARES:
 ; VIDEO RESET
-; SOFT RESET, CLEAR SCREEN, HOME CURSOR, RESTORE ATTRIBUTE/COLOR DEFAULTS
+; SOFT RESET
 ;
-	CALL	EF_CLEARALL
-	CALL	EF_LOADCSTYLE
-	LD	DE,0
-	LD	(EF_VDA_OFFSET),DE
-	CALL	EF_VDASCP
 	XOR	A
 	RET
 ;
diff --git a/Source/HBIOS/gdc.asm b/Source/HBIOS/gdc.asm
index 8d5d936e..a73a432c 100644
--- a/Source/HBIOS/gdc.asm
+++ b/Source/HBIOS/gdc.asm
@@ -161,8 +161,7 @@ GDC_VDAQRY:	; VIDEO INFORMATION QUERY
 	RET
 ;
 GDC_VDARES:	; VIDEO SYSTEM RESET
-	; *** TODO: RESET VIDEO SYSTEM HERE, CLEAR SCREEN,
-	; CURSOR TO TOP LEFT, CLEAR ATTRIBUTES
+	; *** TODO: RESET VIDEO SYSTEM HERE
 	XOR	A
 	RET
 ;
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 51eeec24..4dee78c9 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -298,9 +298,9 @@ ROM_SIG:
 	.DW	DESC			; POINTER TO LONGER DESCRIPTION OF ROM
 	.DB	0, 0, 0, 0, 0, 0	; RESERVED FOR FUTURE USE; MUST BE ZERO
 ;
-NAME	.DB	"ROMWBW v", BIOSVER, ", ", TIMESTAMP, 0
+NAME	.DB	"ROMWBW v", BIOSVER, ", ", CONFIG, ", ", TIMESTAMP, 0
 AUTH	.DB	"WBW",0
-DESC	.DB	"ROMWBW v", BIOSVER, ", Copyright (C) 2020, Wayne Warthen, GNU GPL v3", 0
+DESC	.DB	"Copyright (C) 2024, Wayne Warthen, GNU GPL v3", 0
 ;
 	.FILL	($100 - $),$FF		; PAD REMAINDER OF PAGE ZERO
 ;
@@ -1877,17 +1877,6 @@ SAVE_REC_M:
 	LD	A,0			; BIT 6
 	JR	Z,SAVE_REC_M		; IS RECOVERY MODE
 	LD	A,1
-SAVE_REC_M:
-	LD	(HB_BOOT_REC),A		; SAVE FOR LATER
-    #ENDIF
-  #ENDIF
-  #IF ((PLATFORM == PLT_DUO)
-    #IF (BT_REC_TYPE == BT_REC_DUORI)
-	IN	A,($78 + 6)		; UART_MSR MODEM
-	BIT	6,A			; STATUS REGISTER
-	LD	A,0			; BIT 6
-	JR	Z,SAVE_REC_M		; IS RECOVERY MODE
-	LD	A,1
 SAVE_REC_M:
 	LD	(HB_BOOT_REC),A		; SAVE FOR LATER
     #ENDIF
@@ -1978,19 +1967,19 @@ HB_CPU1:
 	LD	(RTC_DISPACT),A		; RTC DEVICE
 	LD	(DSKY_DISPACT),A	; DSKY DEVICE
 ;
+#IF (SN76489ENABLE)
+	CALL	SN76489_PREINIT
+#ENDIF
 #IF (DSRTCENABLE)
 	CALL	DSRTC_PREINIT
 #ENDIF
-;
 #IF (DSKYENABLE)
   #IF (ICMENABLE)
 	CALL	ICM_PREINIT
   #ENDIF
-;
   #IF (PKDENABLE)
 	CALL	PKD_PREINIT
   #ENDIF
-;
   #IF (H8PENABLE)
 	CALL	H8P_PREINIT
   #ENDIF
@@ -3236,7 +3225,7 @@ CALLDUMMY:
 #IF (BT_REC_TYPE != BT_REC_NONE)
 ;
 HB_PCINIT_REC:
-  #IF ((PLATFORM == PLT_SBC) | (PLATFORM == PLT_MBC) | (PLATFORM == PLT_DUO))
+  #IF ((PLATFORM == PLT_SBC) | (PLATFORM == PLT_MBC))
 	.DW	UART_PREINIT
 ;	.DW	CALLDUMMY
   #ENDIF
@@ -3248,10 +3237,6 @@ HB_INIT_REC:
 	.DW	MD_INIT
 	.DW	PPIDE_INIT
   #ENDIF
-  #IF ((PLATFORM == PLT_DUO)
-	.DW	UART_INIT
-	.DW	MD_INIT
-  #ENDIF
 HB_INITRLEN	.EQU	(($ - HB_INIT_REC) / 2)
 ;
 #ENDIF
@@ -4284,6 +4269,8 @@ SYS_RESCOLD:
 SYS_RESUSER:
 ;
 #IF (CPUFAM == CPU_Z180)
+;
+; IF Z180 CPU, CHECK FOR INVALID OPCODE FLAG AND HANDLE IF SO
 ;
 	IN0	A,(Z180_ITC)		; GET ITC REGISTER
 	XOR	$80			; PRECLEAR TRAP BIT
@@ -4320,6 +4307,9 @@ SYS_RESUSER2:
 	JP	NEWLINE			; FORMATTING & EXIT
 ;
 #ENDIF
+;
+	; RESET ACTIVE VIDEO DISPLAY ATTACHED TO EMULATOR
+	CALL	TERM_RESET
 ;
 	RET				; ELSE RETURN WITH USER RESET VECTOR IN HL
 ;
diff --git a/Source/HBIOS/sn76489.asm b/Source/HBIOS/sn76489.asm
index cdd701e2..413b0883 100644
--- a/Source/HBIOS/sn76489.asm
+++ b/Source/HBIOS/sn76489.asm
@@ -56,6 +56,12 @@ CHANNEL_3_SILENT	.EQU	$FF
 ;
 #INCLUDE "audio.inc"
 ;
+; BLINDLY RESET THE PSG AS SOON AS WE CAN AFTER BOOT BECAUSE IT
+; DOES NOT RESET ITSELF AT POWER ON AND MAKES UGLY NOISE.
+;
+SN76489_PREINIT:
+	JR	SN7_RESET
+;
 SN76489_INIT:
 	LD	IY, SN7_IDAT		; POINTER TO INSTANCE DATA
 	LD	BC, SN7_FNTBL		; BC := FUNCTION TABLE ADDRESS
diff --git a/Source/HBIOS/std.asm b/Source/HBIOS/std.asm
index 6a53acbb..49d9f6d8 100644
--- a/Source/HBIOS/std.asm
+++ b/Source/HBIOS/std.asm
@@ -21,7 +21,7 @@
 ; 17. DUO	Andrew Lynch's Duodyne Computer
 ; 18. HEATH	Les Bird's Heath Z80 Board
 ; 19. EPITX	Alan Cox' Mini-ITX System
-; 20. MON	Jacques Pelletier's Monsputer
+; 20. MON	Jacques Pelletier's Monsputer
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;
@@ -87,8 +87,6 @@ BT_REC_FORCE	.EQU	1		; FORCE BOOT RECOVERY MODE
 BT_REC_SBC01	.EQU	2		; ECB-SBCV2 - BIT 1 RTC HIGH
 BT_REC_SBC1B	.EQU	3		; ECB-SBCV2 - 1-BIT IO PORT
 BT_REC_SBCRI	.EQU	4		; ECB-SBCV2 - 16550 UART RING INDICATOR LINE
-BT_REC_DUORI	.EQU	5		; DUO MULTI I/O - TL16C2552FN UART RING INDICATOR LINE
-
 ;
 BT_REC_TYPE	.EQU	BT_REC_NONE	; BOOT RECOVERY METHOD TO USE
 ;
@@ -121,6 +119,7 @@ CTCMODE_TIM256	.EQU	3		; CTC TIMER W/ DIV 256
 DSRTCMODE_NONE	.EQU	0		; NO DSRTC
 DSRTCMODE_STD	.EQU	1		; ORIGINAL DSRTC CIRCUIT (SBC, ZETA, MK4)
 DSRTCMODE_MFPIC	.EQU	2		; MF/PIC VARIANT
+DSRTCMODE_K80W	.EQU	3		; K80W
 ;
 ; DS1307 RTC MODE SELECTIONS
 ;
diff --git a/Source/HBIOS/term.asm b/Source/HBIOS/term.asm
index 5e569516..1325cff2 100644
--- a/Source/HBIOS/term.asm
+++ b/Source/HBIOS/term.asm
@@ -31,6 +31,8 @@ TERM_PREINIT:
 	XOR	A			; SIGNAL SUCCESS
 	RET				; DONE
 ;
+#IF (TERMENABLE)
+;
 ;======================================================================
 ; TERMINAL DRIVER - ATTACH
 ;======================================================================
@@ -47,13 +49,14 @@ TERM_PREINIT:
 ;   DE: VDA DRIVER'S DISPATCH ADDRESS
 ;   HL: VDA DRIVER'S INSTANCE DATA
 ;
-#IF (TERMENABLE)
-;
 TERM_ATTACH:
 ;
 	LD	A,(TERM_DEVCNT)		; GET NEXT DEVICE NUMBER TO USE
 	LD	B,A			; PUT IT IN B
 	PUSH	HL			; SAVE VDA INSTANCE DATA PTR
+;
+	LD	A,C			; VIDEO UNIT TO A
+	LD	(TERM_VDADEV),A		; SAVE IT
 ;
 	; SETUP EMULATOR MODULE FUNC TBL ADDRESS BASED ON DESIRED EMULATION
 	; EMULATOR PASSES BACK IT'S FUNC TBL ADDRESS IN DE
@@ -83,10 +86,34 @@ TERM_ATTACH:
 	RET				; RETURN
 ;
 ;======================================================================
+; TERMINAL DRIVER - RESET
+;======================================================================
+;
+; RESET THE FULL EMULATION STACK INCLUDING THE UNDERLYING VDA.
+; THIS IS USED TO RECOVER FROM APPLICATIONS THAT REPROGRAM THE
+; VIDEO CHIP.
+;
+TERM_RESET:
+	; ABORT IF NOTHING ATTACHED
+	LD	A,(TERM_DEVCNT)
+	OR	A
+	JR	NZ,TERM_RESET1
+	OR	$FF
+	RET
+;
+TERM_RESET1:
+	; RESET THE ATTACHED VDA DEVICE
+	LD	B,BF_VDARES		; FUNC: RESET
+	LD	A,(TERM_VDADEV)		; GET VDA UNIT NUM
+	LD	C,A			; PUT IN C
+	JP	ANSI_VDADISP		; CALL THE VDA DRIVER
+;
+;======================================================================
 ; TERMINAL DRIVER PRIVATE DATA
 ;======================================================================
 ;
 TERM_DEVCNT	.DB	0		; TERMINAL DEVICE COUNT
+TERM_VDADEV	.DB	0		; ATTACHED VDA UNIT
 ;
 ;======================================================================
 ; EMULATION MODULES
@@ -95,4 +122,10 @@ TERM_DEVCNT	.DB	0		; TERMINAL DEVICE COUNT
   #INCLUDE "tty.asm"
   #INCLUDE "ansi.asm"
 ;
+#ELSE
+;
+TERM_RESET:
+	XOR	A
+	RET
+;
 #ENDIF
\ No newline at end of file
diff --git a/Source/HBIOS/tms.asm b/Source/HBIOS/tms.asm
index 63e28268..d0efcf93 100644
--- a/Source/HBIOS/tms.asm
+++ b/Source/HBIOS/tms.asm
@@ -249,7 +249,7 @@ TMS_INIT:
 TMS_INIT1:
 	CALL 	TMS_CRTINIT		; SETUP THE TMS CHIP REGISTERS
 	CALL	TMS_LOADFONT		; LOAD FONT DATA FROM ROM TO TMS STRORAGE
-	CALL	TMS_VDARES1
+	CALL	TMS_CLEAR		; CLEAR SCREEN, HOME CURSOR
 #IF (TMSMODE == TMSMODE_N8)
 	CALL	PPK_INIT		; INITIALIZE PPI KEYBOARD DRIVER
 #ENDIF
@@ -335,6 +335,7 @@ TMS_VDAINI:
 	; RESET VDA
 	; CURRENTLY IGNORES VIDEO MODE AND BITMAP DATA
 	CALL	TMS_VDARES		; RESET VDA
+	CALL	TMS_CLEAR		; CLEAR SCREEN
 	XOR	A			; SIGNAL SUCCESS
 	RET
 
@@ -350,20 +351,17 @@ TMS_VDARES:
 #IF (CPUFAM == CPU_Z180)
 	CALL	TMS_Z180IO
 #ENDIF
-TMS_VDARES1:	; ENTRY POINT TO AVOID TMS_Z180IO RECURSION
-	LD	DE,0			; ROW = 0, COL = 0
-	CALL	TMS_XY			; SEND CURSOR TO TOP LEFT
-	LD	A,' '			; BLANK THE SCREEN
-	LD	DE,TMS_ROWS * TMS_COLS	; FILL ENTIRE BUFFER
-	CALL	TMS_FILL		; DO IT
-	LD	DE,0			; ROW = 0, COL = 0
-	CALL	TMS_XY			; SEND CURSOR TO TOP LEFT
+	CALL	TMS_CRTINIT1A
+#IF (!USELZSA2)
+	; WE WANT TO RELOAD THE FONT ON RESET, BUT THIS IS NOT CURRENTLY
+	; POSSIBLE WHEN FONT COMPRESSION IS IN USE.
+	CALL	TMS_CLRCUR		; CLEAR CURSOR
+	CALL	TMS_LOADFONT		; RELOAD FONT
+	LD	A,$FF			; REMOVE
+	LD	(TMS_CURSAV),A		; ... SAVED CURSOR CHAR
+	CALL	TMS_SETCUR		; RESTORE CURSOR
+#ENDIF
 	XOR	A
-	DEC	A
-	LD	(TMS_CURSAV),A
-	CALL	TMS_SETCUR		; SET CURSOR
-
-	XOR	A			; SIGNAL SUCCESS
 	RET
 
 TMS_VDADEV:
@@ -624,6 +622,8 @@ TMS_CRTINIT1:
 	LD	A,D
 	OR	E
 	JR	NZ,TMS_CRTINIT1
+;
+TMS_CRTINIT1A:
 ;
 	; INITIALIZE VDU REGISTERS
 	LD 	C,0			; START WITH REGISTER 0
@@ -645,6 +645,26 @@ TMS_CRTINIT2:
     	RET
 ;
 ;----------------------------------------------------------------------
+; CLEAR SCREEN AND HOME CURSOR
+;----------------------------------------------------------------------
+;
+TMS_CLEAR:
+	LD	DE,0			; ROW = 0, COL = 0
+	CALL	TMS_XY			; SEND CURSOR TO TOP LEFT
+	LD	A,' '			; BLANK THE SCREEN
+	LD	DE,TMS_ROWS * TMS_COLS	; FILL ENTIRE BUFFER
+	CALL	TMS_FILL		; DO IT
+	LD	DE,0			; ROW = 0, COL = 0
+	CALL	TMS_XY			; SEND CURSOR TO TOP LEFT
+	XOR	A
+	DEC	A
+	LD	(TMS_CURSAV),A
+	CALL	TMS_SETCUR		; SET CURSOR
+;
+	XOR	A			; SIGNAL SUCCESS
+	RET
+;
+;----------------------------------------------------------------------
 ; LOAD FONT DATA
 ;----------------------------------------------------------------------
 ;
@@ -697,7 +717,7 @@ TMS_STACK	.DW	0
 ;
 ; VIRTUAL CURSOR IS GENERATED BY DYNAMICALLY CHANGING FONT GLYPH
 ; FOR CHAR 255 TO BE THE INVERSE OF THE GLYPH OF THE CHARACTER UNDER
-; THE CURRENT CURSOR POSITION.  THE CHARACTER CODE IS THEN SWITCH TO
+; THE CURRENT CURSOR POSITION.  THE CHARACTER CODE IS THEN SWITCHED TO
 ; THE VALUE 255 AND THE ORIGINAL VALUE IS SAVED.  WHEN THE DISPLAY
 ; NEEDS TO BE CHANGED THE PROCESS IS UNDONE.  IT IS ESSENTIAL THAT
 ; ALL DISPLAY CHANGES BE BRACKETED WITH CALLS TO TMS_CLRCUR PRIOR TO
diff --git a/Source/HBIOS/vdu.asm b/Source/HBIOS/vdu.asm
index b4c1a4c9..faef9888 100644
--- a/Source/HBIOS/vdu.asm
+++ b/Source/HBIOS/vdu.asm
@@ -165,6 +165,12 @@ VDU_VDAINI:
 	; RESET VDA
 	; CURRENTLY IGNORES VIDEO MODE AND BITMAP DATA
 	CALL	VDU_VDARES		; RESET VDA
+	LD	DE,0
+	LD	(VDU_OFFSET),DE
+	CALL	VDU_XY
+	LD	A,' '
+	LD	DE,1024*16
+	CALL	VDU_FILL
 	XOR	A			; SIGNAL SUCCESS
 	RET
 
@@ -176,13 +182,6 @@ VDU_VDAQRY:
 	RET
 
 VDU_VDARES:
-	LD	DE,0
-	LD	(VDU_OFFSET),DE
-	CALL	VDU_XY
-	LD	A,' '
-	LD	DE,1024*16
-	CALL	VDU_FILL
-
 	XOR	A
 	RET
 
diff --git a/Source/HBIOS/vga.asm b/Source/HBIOS/vga.asm
index 8b78c38a..cbe7f6fe 100644
--- a/Source/HBIOS/vga.asm
+++ b/Source/HBIOS/vga.asm
@@ -180,18 +180,7 @@ VGA_VDAINI:
 	; RESET VDA
 	; CURRENTLY IGNORES VIDEO MODE AND BITMAP DATA
 	CALL	VGA_VDARES	; RESET VDA
-	XOR	A		; SIGNAL SUCCESS
-	RET
-
-VGA_VDAQRY:
-	LD	C,$00		; MODE ZERO IS ALL WE KNOW
-	LD	D,VGA_ROWS	; ROWS
-	LD	E,VGA_COLS	; COLS
-	LD	HL,0		; EXTRACTION OF CURRENT BITMAP DATA NOT SUPPORTED YET
-	XOR	A		; SIGNAL SUCCESS
-	RET
 
-VGA_VDARES:
 	LD	A,$07		; ATTRIBUTE IS STANDARD WHITE ON BLACK
 	LD	(VGA_ATTR),A	; SAVE IT
 	XOR	A		; ZERO (REVERSE, UNDERLINE, BLINK)
@@ -205,6 +194,18 @@ VGA_VDARES:
 	LD	DE,0		; ROW = 0, COL = 0
 	CALL	VGA_XY		; SEND CURSOR TO TOP LEFT
 
+	XOR	A		; SIGNAL SUCCESS
+	RET
+
+VGA_VDAQRY:
+	LD	C,$00		; MODE ZERO IS ALL WE KNOW
+	LD	D,VGA_ROWS	; ROWS
+	LD	E,VGA_COLS	; COLS
+	LD	HL,0		; EXTRACTION OF CURRENT BITMAP DATA NOT SUPPORTED YET
+	XOR	A		; SIGNAL SUCCESS
+	RET
+
+VGA_VDARES:
 	LD	HL,$0404 | VGA_89BIT; SET VIDEO ENABLE BIT
 	CALL	VGA_SETCFG	; DO IT
 
diff --git a/Source/HBIOS/vrc.asm b/Source/HBIOS/vrc.asm
index c224c9de..51d50e63 100644
--- a/Source/HBIOS/vrc.asm
+++ b/Source/HBIOS/vrc.asm
@@ -117,18 +117,6 @@ VRC_VDAINI:
 	; RESET VDA
 	; CURRENTLY IGNORES VIDEO MODE AND BITMAP DATA
 	CALL	VRC_VDARES	; RESET VDA
-	XOR	A		; SIGNAL SUCCESS
-	RET
-
-VRC_VDAQRY:
-	LD	C,$00		; MODE ZERO IS ALL WE KNOW
-	LD	D,VRC_ROWS	; ROWS
-	LD	E,VRC_COLS	; COLS
-	LD	HL,0		; EXTRACTION OF CURRENT BITMAP DATA NOT SUPPORTED YET
-	XOR	A		; SIGNAL SUCCESS
-	RET
-
-VRC_VDARES:
 	XOR	A		; CLEAR ATTRIBUTES (REV VIDEO OFF)
 	LD	(VRC_ATTR),A	; SAVE IT
 	DEC	A		; INIT CUR NESTING, INIT TO HIDDEN
@@ -143,7 +131,18 @@ VRC_VDARES:
 	LD	DE,0		; ROW = 0, COL = 0
 	CALL	VRC_XY		; SEND CURSOR TO TOP LEFT
 	CALL	VRC_SHOWCUR	; NOW SHOW THE CURSOR
-;
+	XOR	A		; SIGNAL SUCCESS
+	RET
+
+VRC_VDAQRY:
+	LD	C,$00		; MODE ZERO IS ALL WE KNOW
+	LD	D,VRC_ROWS	; ROWS
+	LD	E,VRC_COLS	; COLS
+	LD	HL,0		; EXTRACTION OF CURRENT BITMAP DATA NOT SUPPORTED YET
+	XOR	A		; SIGNAL SUCCESS
+	RET
+
+VRC_VDARES:
 	XOR	A		; SIGNAL SUCCESS
 	RET
 
diff --git a/Source/ver.inc b/Source/ver.inc
index 8234ae11..1a73d142 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,7 +2,7 @@
 #DEFINE	RMN	5
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.5.0-dev.19"
+#DEFINE BIOSVER	"3.5.0-dev.25"
 #define rmj	RMJ
 #define rmn	RMN
 #define rup	RUP
diff --git a/Source/ver.lib b/Source/ver.lib
index 782345d4..e5411f12 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	5
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.5.0-dev.19"
+	db	"3.5.0-dev.25"
 	endm