DUART: don't build in the standard configuration

add a separate RCZ80_duart configuration, at least until it gets more testing

Source/HBIOS/Config/RCZ80_duart.asm

@@ -0,0 +1,32 @@
+;
+;==================================================================================================
+;   RC2014 Z80 CONFIGURATION W/ DUART
+;==================================================================================================
+;
+; THE COMPLETE SET OF DEFAULT CONFIGURATION SETTINGS FOR THIS PLATFORM ARE FOUND IN THE
+; CFG_<PLT>.ASM INCLUDED FILE WHICH IS FOUND IN THE PARENT DIRECTORY.  THIS FILE CONTAINS
+; COMMON CONFIGURATION SETTINGS THAT OVERRIDE THE DEFAULTS.  IT IS INTENDED THAT YOU MAKE
+; YOUR CUSTOMIZATIONS IN THIS FILE AND JUST INHERIT ALL OTHER SETTINGS FROM THE DEFAULTS.
+; EVEN BETTER, YOU CAN MAKE A COPY OF THIS FILE WITH A NAME LIKE <PLT>_XXX.ASM AND SPECIFY
+; YOUR FILE IN THE BUILD PROCESS.
+;
+; THE SETTINGS BELOW ARE THE SETTINGS THAT ARE MOST COMMONLY MODIFIED FOR THIS PLATFORM.
+; MANY OF THEM ARE EQUAL TO THE SETTINGS IN THE INCLUDED FILE, SO THEY DON'T REALLY DO
+; ANYTHING AS IS.  THEY ARE LISTED HERE TO MAKE IT EASY FOR YOU TO ADJUST THE MOST COMMON
+; SETTINGS.
+;
+; N.B., SINCE THE SETTINGS BELOW ARE REDEFINING VALUES ALREADY SET IN THE INCLUDED FILE,
+; TASM INSISTS THAT YOU USE THE .SET OPERATOR AND NOT THE .EQU OPERATOR BELOW. ATTEMPTING
+; TO REDEFINE A VALUE WITH .EQU BELOW WILL CAUSE TASM ERRORS!
+;
+; PLEASE REFER TO THE CUSTOM BUILD INSTRUCTIONS (README.TXT) IN THE SOURCE DIRECTORY (TWO
+; DIRECTORIES ABOVE THIS ONE).
+;
+#define	BOOT_DEFAULT	"H"		; DEFAULT BOOT LOADER CMD ON <CR> OR AUTO BOOT
+;
+#define	PLATFORM_NAME	"RC2014 (DUART)"
+;
+#include "Config/RCZ80_std.asm"
+;
+DUARTENABLE	.EQU	TRUE		; DUART: ENABLE 2681/2692 SERIAL DRIVER (DUART.ASM)
+DUARTCNT	.EQU	1		; DUART: NUMBER OF CHIPS TO DETECT (1-2)

Source/HBIOS/Makefile

@@ -13,6 +13,7 @@ else
 	OBJECTS += RCZ180_nat.rom RCZ180_nat.com
 	OBJECTS += RCZ80_kio.rom RCZ80_kio.com
 	OBJECTS += RCZ80_mt.rom RCZ80_mt.com
+	OBJECTS += RCZ80_duart.rom RCZ80_duart.com
 	OBJECTS += RCZ80_std.rom RCZ80_std.com
 	OBJECTS += SBC_simh.rom SBC_simh.com
 	OBJECTS += SBC_std.rom SBC_std.com

Source/HBIOS/cfg_rcz80.asm

@@ -75,17 +75,14 @@ INTRTCENABLE	.EQU	FALSE		; ENABLE PERIODIC INTERRUPT CLOCK DRIVER (INTRTC.ASM)
 HTIMENABLE	.EQU	FALSE		; ENABLE SIMH TIMER SUPPORT
 SIMRTCENABLE	.EQU	FALSE		; ENABLE SIMH CLOCK DRIVER (SIMRTC.ASM)
 ;
-DUARTENABLE	.EQU	TRUE		; DUART: ENABLE 2681/2692 SERIAL DRIVER (DUART.ASM)
-DUARTDEBUG	.EQU	FALSE		; DUART: ENABLE DEBUG OUTPUT
+DUARTENABLE	.EQU	FALSE		; DUART: ENABLE 2681/2692 SERIAL DRIVER (DUART.ASM)
 DUARTCNT	.EQU	2		; DUART: NUMBER OF CHIPS TO DETECT (1-2)
 DUART0BASE	.EQU	$A0		; DUART 0: BASE ADDRESS OF CHIP
 DUART0ACFG	.EQU	DEFSERCFG	; DUART 0A: SERIAL LINE CONFIG
 DUART0BCFG	.EQU	DEFSERCFG	; DUART 0B: SERIAL LINE CONFIG
-DUART0CLK	.EQU	3686400		; DUART 0: OSC FREQ IN HZ (STANDARD IS 3686400)
 DUART1BASE	.EQU	$40		; DUART 1: BASE ADDRESS OF CHIP
 DUART1ACFG	.EQU	DEFSERCFG	; DUART 1A: SERIAL LINE CONFIG
 DUART1BCFG	.EQU	DEFSERCFG	; DUART 1B: SERIAL LINE CONFIG
-DUART1CLK	.EQU	3686400		; DUART 1: OSC FREQ IN HZ (STANDARD IS 3686400)
 ;
 UARTENABLE	.EQU	TRUE		; UART: ENABLE 8250/16550-LIKE SERIAL DRIVER (UART.ASM)
 UARTOSC		.EQU	1843200		; UART: OSC FREQUENCY IN MHZ