From 7ba9bd6e67d9e17be97a21c87e10268b7a88629d Mon Sep 17 00:00:00 2001
From: Sergey Kiselev <skiselev@gmail.com>
Date: Wed, 27 Feb 2019 09:38:05 -0800
Subject: [PATCH] Add support for Eazy Z80

Signed-off-by: Sergey Kiselev <skiselev@gmail.com>
---
 Source/HBIOS/Config/RC_ez80.asm | 22 ++++++++++++++++++++++
 Source/HBIOS/sio.asm            | 17 +++++++++++++++--
 Source/HBIOS/std.asm            |  1 +
 3 files changed, 38 insertions(+), 2 deletions(-)
 create mode 100644 Source/HBIOS/Config/RC_ez80.asm

diff --git a/Source/HBIOS/Config/RC_ez80.asm b/Source/HBIOS/Config/RC_ez80.asm
new file mode 100644
index 00000000..057a5547
--- /dev/null
+++ b/Source/HBIOS/Config/RC_ez80.asm
@@ -0,0 +1,22 @@
+;
+;==================================================================================================
+;   RC2014 - EASY Z80 CONFIGURATION
+;==================================================================================================
+;
+#include "cfg_rc.asm"
+;
+CPUOSC		.SET	10000000	; CPU OSC FREQ
+DEFSERCFG	.SET	SER_115200_8N1	; DEFAULT SERIAL LINE CONFIG (SHOULD MATCH ABOVE)
+;
+SIOENABLE	.SET	TRUE		; TRUE TO AUTO-DETECT ZILOG SIO/2 
+SIOMODE		.SET	SIOMODE_EZ80	; TYPE OF SIO/2 TO DETECT: SIOMODE_RC, SIOMODE_SMB, SIOMODE_EZ80
+ACIAENABLE	.SET	FALSE		; TRUE TO AUTO-DETECT MOTOROLA 6850 ACIA
+;
+FDENABLE	.SET	FALSE		; TRUE FOR FLOPPY SUPPORT
+FDMODE		.SET	FDMODE_RCWDC	; FDMODE_RCSMC, FDMODE_RCWDC
+;
+IDEENABLE	.SET	TRUE		; TRUE FOR IDE DEVICE SUPPORT (CF MODULE)
+IDEMODE		.SET	IDEMODE_RC	; TYPE OF CF MODULE: IDEMODE_RC, IDEMODE_SMB
+PPIDEENABLE	.SET	FALSE		; TRUE FOR PPIDE DEVICE SUPPORT (PPIDE MODULE)
+;
+DSRTCENABLE	.SET	FALSE		; DS-1302 CLOCK DRIVER
diff --git a/Source/HBIOS/sio.asm b/Source/HBIOS/sio.asm
index e5a44ab7..02a0ddd9 100644
--- a/Source/HBIOS/sio.asm
+++ b/Source/HBIOS/sio.asm
@@ -40,6 +40,13 @@ SIOB_CMD	.EQU	SIOBASE + $07
 SIOB_DAT	.EQU	SIOBASE + $05
 #ENDIF
 ;
+#IF (SIOMODE == SIOMODE_EZ80)
+SIOA_CMD	.EQU	SIOBASE + $01	
+SIOA_DAT	.EQU	SIOBASE + $00
+SIOB_CMD	.EQU	SIOBASE + $03
+SIOB_DAT	.EQU	SIOBASE + $02
+#ENDIF	
+;	
 ; CONDITIONALS THAT DETERMINE THE ENCODED VALUE OF THE BAUD RATE
 ;
 #INCLUDE "siobaud.inc"	
@@ -276,6 +283,9 @@ SIO_IN:
 #IF ((SIOMODE == SIOMODE_SMB) | (SIOMODE == SIOMODE_ZP))
 	DEC	C			; DECREMENT CMD PORT TWICE TO GET DATA PORT
 	DEC	C
+#ENDIF
+#IF (SIOMODE == SIOMODE_EZ80)
+	DEC	C			; DECREMENT CMD PORT TO GET DATA PORT
 #ENDIF
 	IN	E,(C)			; GET CHAR
 	XOR	A			; SIGNAL SUCCESS
@@ -358,8 +368,11 @@ SIO_OUT:
 	INC	C			; BUMP TO DATA PORT
 #ENDIF
 #IF ((SIOMODE == SIOMODE_SMB) | (SIOMODE == SIOMODE_ZP))
-	DEC C				; DECREMENT CMD PORT TWICE TO GET DATA PORT
-	DEC C
+	DEC	C			; DECREMENT CMD PORT TWICE TO GET DATA PORT
+	DEC	C
+#ENDIF
+#IF (SIOMODE == SIOMODE_EZ80)
+	DEC	C			; DECREMENT CMD PORT TO GET DATA PORT
 #ENDIF
 	OUT	(C),E			; SEND CHAR FROM E
 	XOR	A			; SIGNAL SUCCESS
diff --git a/Source/HBIOS/std.asm b/Source/HBIOS/std.asm
index cc37b3fc..9287f195 100644
--- a/Source/HBIOS/std.asm
+++ b/Source/HBIOS/std.asm
@@ -78,6 +78,7 @@ SIOMODE_NONE	.EQU	0
 SIOMODE_RC	.EQU	1		; RC2014 SIO MODULE (SPENCER OWEN)
 SIOMODE_SMB	.EQU	2		; RC2014 SIO MODULE (SCOTT BAKER)
 SIOMODE_ZP	.EQU	3		; ECB-ZILOG PERIPHERALS BOARD
+SIOMODE_EZ80	.EQU	4		; EASY Z80 ON-BOARD SIO/0
 ;
 ; PIO MODE SELECTIONS
 ;