diff --git a/Doc/RomWBW Applications.pdf b/Doc/RomWBW Applications.pdf
index f24dd6dd..ab27f885 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 f05f80b7..af7039d5 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 3120e018..37d3dccd 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 eafdd782..083ef1f2 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 3e13cebf..a3869541 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 a342499b..2512f440 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 986bf2ae..d37eea96 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -3,7 +3,7 @@
 **RomWBW ReadMe** \
 Version 3.4 \
 Wayne Warthen  ([wwarthen@gmail.com](mailto:wwarthen@gmail.com)) \
-14 Dec 2023
+18 Dec 2023
 
 # Overview
 
diff --git a/ReadMe.txt b/ReadMe.txt
index 72e170fd..8e147f09 100644
--- a/ReadMe.txt
+++ b/ReadMe.txt
@@ -1,6 +1,6 @@
 RomWBW ReadMe
 Wayne Warthen (wwarthen@gmail.com)
-14 Dec 2023
+18 Dec 2023
 
 
 
diff --git a/Source/Doc/UserGuide.md b/Source/Doc/UserGuide.md
index a97b5312..c57fd02c 100644
--- a/Source/Doc/UserGuide.md
+++ b/Source/Doc/UserGuide.md
@@ -4256,6 +4256,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
 - ACIA: IO=128, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4292,6 +4296,10 @@ the RomWBW HBIOS configuration.
 - UART: MODE=RC, IO=168
 - SIO MODE=STD, IO=136, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=STD, IO=136, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4336,6 +4344,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4377,6 +4389,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4418,6 +4434,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - ACIA: IO=128, INTERRUPTS ENABLED
 - MD: TYPE=RAM
 - MD: TYPE=ROM
@@ -4457,6 +4477,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4497,6 +4521,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=STD, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4537,6 +4565,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=STD, IO=24, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4578,6 +4610,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
 - ACIA: IO=128, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4621,6 +4657,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4665,6 +4705,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4736,6 +4780,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4779,6 +4827,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -4822,7 +4874,11 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
-- MD: TYPE=RAM
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
+S- MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
 - FD: MODE=RCWDC, IO=80, DRIVE 1, TYPE=3.5" HD
@@ -4978,6 +5034,10 @@ the RomWBW HBIOS configuration.
 - ACIA: IO=128, INTERRUPTS ENABLED
 - VRC: IO=0, KBD MODE=VRC, KBD IO=244
 - KBD: ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -5021,6 +5081,10 @@ the RomWBW HBIOS configuration.
 - ACIA: IO=128, INTERRUPTS ENABLED
 - VRC: IO=0, KBD MODE=VRC, KBD IO=244
 - KBD: ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
 - FD: MODE=RCWDC, IO=80, DRIVE 1, TYPE=3.5" HD
@@ -5064,6 +5128,10 @@ the RomWBW HBIOS configuration.
 - ACIA: IO=128, INTERRUPTS ENABLED
 - VRC: IO=0, KBD MODE=VRC, KBD IO=244
 - KBD: ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
 - FD: MODE=RCWDC, IO=80, DRIVE 1, TYPE=3.5" HD
@@ -5107,6 +5175,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
 - FD: MODE=RCWDC, IO=80, DRIVE 1, TYPE=3.5" HD
@@ -5147,6 +5219,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=128, CHANNEL B, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL A, INTERRUPTS ENABLED
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - VRC: IO=0, KBD MODE=VRC, KBD IO=244
 - KBD: ENABLED
 - MD: TYPE=RAM
@@ -5191,6 +5267,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
 - VRC: IO=0, KBD MODE=VRC, KBD IO=244
 - KBD: ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
 - FD: MODE=RCWDC, IO=80, DRIVE 1, TYPE=3.5" HD
@@ -5233,6 +5313,10 @@ the RomWBW HBIOS configuration.
 - SIO MODE=RC, IO=132, CHANNEL B, INTERRUPTS ENABLED
 - VRC: IO=0, KBD MODE=VRC, KBD IO=244
 - KBD: ENABLED
+- CH: IO=62
+- CH: IO=60
+- CHUSB: IO=62
+- CHUSB: IO=60
 - MD: TYPE=RAM
 - MD: TYPE=ROM
 - FD: MODE=RCWDC, IO=80, DRIVE 0, TYPE=3.5" HD
@@ -5300,7 +5384,6 @@ the RomWBW HBIOS configuration.
 - MD: TYPE=ROM
 - SD: MODE=SC, IO=12, UNITS=1
 
-
 ##### Notes:
 
 `\clearpage`{=latex}
diff --git a/Source/HBIOS/Config/SCZ180_sc131.asm b/Source/HBIOS/Config/SCZ180_sc131.asm
index 58c9e5a0..8d224875 100644
--- a/Source/HBIOS/Config/SCZ180_sc131.asm
+++ b/Source/HBIOS/Config/SCZ180_sc131.asm
@@ -52,3 +52,4 @@ PPIDEENABLE	.SET	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 SDENABLE	.SET	TRUE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.SET	SDMODE_SC	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT|USR]
 SDCNT		.SET	1		; SD: NUMBER OF SD CARD DEVICES (1-2), FOR DSD & SC ONLY
+CHENABLE	.SET	FALSE		; CH: ENABLE CH375/376 USB SUPPORT
diff --git a/Source/HBIOS/cfg_rcz80.asm b/Source/HBIOS/cfg_rcz80.asm
index ea4686b9..23fb5c29 100644
--- a/Source/HBIOS/cfg_rcz80.asm
+++ b/Source/HBIOS/cfg_rcz80.asm
@@ -252,7 +252,7 @@ SDTRACE		.EQU	1		; SD: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 SDCSIOFAST	.EQU	FALSE		; SD: ENABLE TABLE-DRIVEN BIT INVERTER IN CSIO MODE
 SDMTSWAP	.EQU	FALSE		; SD: SWAP THE LOGICAL ORDER OF THE SPI PORTS OF THE MT011
 ;
-CHENABLE	.EQU	FALSE		; CH: ENABLE CH375/376 USB SUPPORT
+CHENABLE	.EQU	TRUE		; CH: ENABLE CH375/376 USB SUPPORT
 CHTRACE		.EQU	1		; CH: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 CHUSBTRACE	.EQU	1		; CHUSB: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 CHSDTRACE	.EQU	1		; CHSD: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
diff --git a/Source/ver.inc b/Source/ver.inc
index 079c63fc..33d93470 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,7 +2,7 @@
 #DEFINE	RMN	4
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.4.0-dev.35"
+#DEFINE BIOSVER	"3.4.0-dev.36"
 #define rmj	RMJ
 #define rmn	RMN
 #define rup	RUP
diff --git a/Source/ver.lib b/Source/ver.lib
index 1fc9eb4c..016d1e8b 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	4
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.4.0-dev.35"
+	db	"3.4.0-dev.36"
 	endm