Support Mini-ITX Z180 Platform by Alan Cox

Support for Mini-ITX contributed by Alan Cox.

Source/HBIOS/Build.cmd

@@ -235,5 +235,6 @@ call Build Z80RETRO std || exit /b
 call Build S100 std || exit /b
 call Build DUO std || exit /b
 call Build HEATH std || exit /b
+call Build EPITX std || exit /b
 
 goto :eof

Source/HBIOS/Build.ps1

@@ -28,7 +28,7 @@ $ErrorAction = 'Stop'
 #
 
 $PlatformListZ80 = "SBC", "MBC", "ZETA", "ZETA2", "RCZ80", "Z80RETRO", "DUO", "UNA", "HEATH"
-$PlatformListZ180 = "N8", "MK4", "RCZ180", "SCZ180", "DYNO", "RPH", "S100"
+$PlatformListZ180 = "N8", "MK4", "RCZ180", "SCZ180", "DYNO", "RPH", "S100", "EPITX"
 $PlatformListZ280 = "RCZ280"
 
 #

Source/HBIOS/Build.sh

@@ -47,6 +47,7 @@ if [ "${ROM_PLATFORM}" == "dist" ] ; then
 	ROM_PLATFORM="ZETA"; ROM_CONFIG="std"; bash Build.sh
 	ROM_PLATFORM="ZETA2"; ROM_CONFIG="std"; bash Build.sh
 	ROM_PLATFORM="HEATH"; ROM_CONFIG="std"; bash Build.sh
+	ROM_PLATFORM="EPITX"; ROM_CONFIG="std"; bash Build.sh
 	exit
 fi
 

Source/HBIOS/Config/EPITX_std.asm

@@ -0,0 +1,64 @@
+;
+;==================================================================================================
+;   Z180 Mini ITX STANDARD CONFIGURATION
+;==================================================================================================
+;
+; 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	PLATFORM_NAME	"Z180 MiniITX"
+;
+#DEFINE	BOOT_DEFAULT	"H"		; DEFAULT BOOT LOADER CMD ON <CR> OR AUTO BOOT
+;
+#include "cfg_epitx.asm"
+;
+CRTACT		.SET	TRUE		; ACTIVATE CRT (VDU,CVDU,PROPIO,ETC) AT STARTUP
+;
+CPUOSC		.SET	18432000	; CPU OSC FREQ IN MHZ
+;
+Z180_CLKDIV	.SET	1		; Z180: CHK DIV: 0=OSC/2, 1=OSC, 2=OSC*2
+Z180_MEMWAIT	.SET	0		; Z180: MEMORY WAIT STATES (0-3)
+Z180_IOWAIT	.SET	1		; Z180: I/O WAIT STATES TO ADD ABOVE 1 W/S BUILT-IN (0-3)
+;
+HBIOS_MUTEX	.SET	FALSE		; ENABLE REENTRANT CALLS TO HBIOS (ADDS OVERHEAD)
+;
+LEDENABLE	.SET	FALSE		; ENABLE STATUS LED (SINGLE LED)
+;
+DSRTCENABLE	.SET	FALSE		; DSRTC: ENABLE DS-1302 CLOCK DRIVER (DSRTC.ASM)
+INTRTCENABLE	.SET	TRUE		; ENABLE PERIODIC INTERRUPT CLOCK DRIVER (INTRTC.ASM)
+;
+UARTENABLE	.SET	TRUE		; UART: ENABLE 8250/16550-LIKE SERIAL DRIVER (UART.ASM)
+ASCIENABLE	.SET	TRUE		; ASCI: ENABLE Z180 ASCI SERIAL DRIVER (ASCI.ASM)
+ACIAENABLE	.SET	FALSE		; ACIA: ENABLE MOTOROLA 6850 ACIA DRIVER (ACIA.ASM)
+SIOENABLE	.SET	FALSE		; SIO: ENABLE ZILOG SIO SERIAL DRIVER (SIO.ASM)
+;
+TMSENABLE	.SET	TRUE		; TMS: ENABLE TMS9918 VIDEO/KBD DRIVER (TMS.ASM)
+;
+AY38910ENABLE	.SET	FALSE		; AY: AY-3-8910 / YM2149 SOUND DRIVER
+;
+FDENABLE	.SET	TRUE		; FD: DRIVER MODE: FDMODE_[DIO|ZETA|ZETA2|DIDE|N8|DIO3|RCSMC|RCWDC|DYNO|EPFDC]
+FDMODE		.SET	FDMODE_EPFDC	; FD: DRIVER MODE: FDMODE_[DIO|ZETA|DIDE|N8|DIO3]
+;
+IDEENABLE	.SET	FALSE		; IDE: ENABLE IDE DISK DRIVER (IDE.ASM)
+;
+PPIDEENABLE	.SET	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM)
+;
+SDENABLE	.SET	TRUE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
+;
+PRPENABLE	.SET	FALSE		; PRP: ENABLE ECB PROPELLER IO BOARD DRIVER (PRP.ASM)

Source/HBIOS/hbios.asm

@@ -1357,6 +1357,41 @@ Z280_INITZ:
 	OUT	(FPLED_IO),A
 #ENDIF
 
+;
+; Z180 MINI-ITX MADNESS TO INITIALIZE THE PPIO. WE HAVE THE MAIN RAM AT
+; $8000 AND ROM AT $0 AT THIS POINT AND THE Z180 MMU SET UP. NOW
+; GET THE 82C55 PROGRAMMED.
+;
+#IF (PLATFORM == PLT_EPITX)
+	; THE 82C55 IS BRAINDEAD AND FLIPS OUTPUT LINES TO 0 WHEN WE SET
+	; THE MODE. WE BOOT WITH THE ROM ENABLED BUT THE RESET WILL ENABLE
+	; LOW RAM. SOME MENTAL BACKFLIPS REQUIRED TO MAKE THIS WORK
+	LD	HL,BOOTFLIP
+	LD	DE,$8000
+	LD	BC,$10
+	LDIR
+	JP	$8000
+;
+BOOTFLIP:
+	; SET THE MODE. ALSO CLEARS ALL THE OUTPUT BITS SO WE BLIP THE
+	; I2C, KEYBOARD ETC BUT NOBODY WILL CARE. HOWEVER WE ALSO FLIP
+	; TO ALL RAM MODE HENCE THIS IS EXECUTED HIGH
+	; A OUT B IN C HIGH IN C LOW IN
+	LD	A,$8B
+	OUT	($43),A
+	LD	A,$FF
+	OUT	($40),A
+	JP	ROMRESUME
+;
+ROMRESUME:
+	; THIS WILL GLITCH EXTRAM ON SO WE MUST NOW BE IN ROM
+	LD	A,$8A		; C LOW NOW OUTPUT
+	OUT	($43),A
+	LD	A,$FF
+	OUT	($42),A		; EXTRAM OFF, RAM BACK IN, SPI 7
+	; AND DONE. MODE REMAINS THIS WAY FOREVER
+;
+#ENDIF
 ;
 ; WE USE THE TWO BYTES IMMEDIATELY BELOW THE PROXY TO STORE A COUPLE
 ; VALUES TEMPORARILY BECAUSE WE MAY BE OPERATING IN ROM AT THIS POINT.

Source/HBIOS/hbios.inc

@@ -153,6 +153,7 @@ PLT_Z80RETRO	.EQU	15		; Z80 RETRO COMPUTER
 PLT_S100	.EQU	16		; S100 COMPUTERS Z180 SYSTEM
 PLT_DUO		.EQU	17		; DUODYNE Z80 SYSTEM
 PLT_HEATH	.EQU	18		; HEATHKIT H8 Z80 SYSTEM
+PLT_EPITX	.EQU	19		; Z180 MINI-ITX
 ;
 ; HBIOS GLOBAL ERROR RETURN VALUES
 ;

Source/HBIOS/sd.asm

@@ -357,6 +357,19 @@ SD_DO		.EQU	%00000001	; DATA OUT (CARD -> CPU) MISO
 SD_CINIT	.EQU	FALSE		; INITIALIZE OUTPUT PORT
 SD_INVCS	.EQU	FALSE		; INVERT CS
 #ENDIF
+
+; FOR NOW WE JUST HOOK UP ONE UNIT. THERE ARE EIGHT PORTS FOR DIFFERENT
+; THINGS BUT THIS WILL GET US GOING
+#IF (SDMODE == SDMODE_EPITX)		; Z180 ITX - CSIO, 82C55 for CS
+SD_DEVMAX	.EQU	1		; NUMBER OF PHYSICAL UNITS (SOCKETS)
+SD_OPRREG	.EQU	$42		; 82C55 PORT C, LOW 3 ARE \CS MUX
+SD_OPRDEF	.EQU	%11111111	; QUIESCENT STATE (ROM ENABLED)
+SD_CS0		.EQU	%11111000	; SPI CHANNEL 0 (4 INPUTS, ROM EN, CHAN 0)
+SD_CNTR		.EQU	Z180_CNTR
+SD_TRDR		.EQU	Z180_TRDR
+SD_IOBASE	.EQU	SD_OPRREG	; IOBASE
+SD_INVCS	.EQU	FALSE		; INVERT CS
+#ENDIF
 ;
 #IF (SD_DEVCNT > SD_DEVMAX)
 	.ECHO	"*** ERROR: SDCNT EXCEEDS MAXIMUM SUPPORTED BY INTERFACE!!!\n"
@@ -586,6 +599,22 @@ SD_INIT:
 	LD	A,SD_IOBASE
 	CALL	PRTHEXBYTE
 #ENDIF
+;
+#IF (SDMODE == SDMODE_EPITX)
+	PRTS(" MODE=EPITX$")
+  #IF (SDCSIOFAST)
+	PRTS(" FAST$")
+  #ENDIF
+	PRTS(" OPR=0x$")
+	LD	A,SD_OPRREG
+	CALL	PRTHEXBYTE
+	PRTS(" CNTR=0x$")
+	LD	A,SD_CNTR
+	CALL	PRTHEXBYTE
+	PRTS(" TRDR=0x$")
+	LD	A,SD_TRDR
+	CALL	PRTHEXBYTE
+#ENDIF
 ;
 	CALL	SD_PROBE		; CHECK FOR HARDWARE
 	JR	Z,SD_INIT00		; CONTINUE IF PRESENT
@@ -847,7 +876,7 @@ SD_IO:
 	OR	A			; SET FLAGS
 	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
 ;
-#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 	; CONSIDER CAPTURING CURRENT CNTR VALUE HERE AND USE IT
 	; IN SD_CSIO_DEF
 
@@ -1026,7 +1055,7 @@ SD_INITCARD:
 	CALL	SD_CHKCD		; CHECK CARD DETECT
 	JP	Z,SD_NOMEDIA		; Z=NO MEDIA, HANDLE IF SO
 ;
-#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 	CALL	SD_CSIO_DEF		; ENSURE CSIO AT DEFAULT SPEED
 #ENDIF
 ;
@@ -1040,7 +1069,7 @@ SD_INITCARD1:
 	DJNZ	SD_INITCARD1		; LOOP AS NEEDED
 ;
 	; MAKE SURE WE FINISH SENDING
-#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 	CALL	SD_WAITTX		; WAIT FOR TE TO CLEAR
 	CALL	DLY32			; WAIT A BIT MORE FOR FINAL BIT
 #ENDIF
@@ -1776,7 +1805,7 @@ SD_SETUP:
 	OUT	(SD_PPIX),A
 #ENDIF
 ;
-#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 	; CSIO SETUP FOR Z180 CSIO
 ;	LD	A,2			; DIV 80, 225KHZ @ 18MHZ CLK
 	LD	A,6			; DIV 1280, 14KHZ @ 18MHZ CLK
@@ -1789,7 +1818,7 @@ SD_SETUP:
 	OUT	(SD_OPRREG),A
 #ENDIF
 ;
-#IF ((SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_DSD) | (SDMODE == SDMODE_PPI) | (SDMODE == SDMODE_MT))
+#IF ((SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_DSD) | (SDMODE == SDMODE_PPI) | (SDMODE == SDMODE_MT) | (SDMODE == SDMODE_EPITX))
 	LD	A,SD_OPRDEF
 	LD	(SD_OPRVAL),A
 	OUT	(SD_OPRREG),A
@@ -1894,10 +1923,16 @@ SD_SELECT1:
   #IF (SD_DEVCNT > 1)
 	OR	SD_CS1
   #ENDIF
+#ELSE
+#IF (SDMODE == SDMODE_EPITX)
+	LD	A,(SD_OPRVAL)
+	AND	$F8
+	OR	SD_CS0			; WILL DO 1-7 LATER
 #ELSE
 	LD	A,(SD_OPRVAL)		; GET CURRENT OPRVAL BACK
 	OR	SD_CS0
 #ENDIF
+#ENDIF
 ;
 SD_SELECT2:
 ; ADJUST BIT(S) FOR INTERFACES USING INVERTED CS BITS
@@ -1921,7 +1956,7 @@ SD_SELECT2:
 ; DESELECT CARD
 ;
 SD_DESELECT:
-#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 	; DON'T REMOVE CS UNTIL WE ARE DONE SENDING!
 	CALL	SD_WAITTX		; WAIT FOR TE TO CLEAR
 ;
@@ -1938,9 +1973,13 @@ SD_DESELECT:
 	LD	A,(SD_OPRVAL)
 #IF (((SDMODE == SDMODE_SC) | (SDMODE_MT)) & (SD_DEVCNT > 1))
 	AND	~(SD_CS0 | SD_CS1)
+#ELSE
+#if (SDMODE == SDMODE_EPITX)
+	OR	7			; CHAN 7 IS USED FOR DESELECTS
 #ELSE
 	AND	~SD_CS0
 #ENDIF
+#ENDIF
 ; ADJUST BIT(S) FOR INTERFACES USING INVERTED CS BITS
 #IF ((SDMODE == SDMODE_PPI) | (SDMODE == SDMODE_UART) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_PIO) | (SDMODE == SDMODE_Z80R))
   #IF ((SDMODE == SDMODE_SC) & (SD_DEVCNT > 1))
@@ -1953,9 +1992,9 @@ SD_DESELECT:
 	OUT	(SD_OPRREG),A
 	RET
 ;
-#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 ;
-; CSIO WAIT FOR TRANSMIT READY (TX REGSITER EMPTY)
+; CSIO WAIT FOR TRANSMIT READY (TX REGISTER EMPTY)
 ;
 SD_WAITTX:
 	IN0	A,(SD_CNTR)		; GET CSIO STATUS
@@ -1981,7 +2020,7 @@ SD_PUT:
 	OUT	(SD_WRTR),A
 #ELSE
 ;
-  #IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+  #IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 	CALL	MIRROR			; MSB<-->LSB MIRROR BITS, RESULT IN C
 	CALL	SD_WAITTX		; MAKE SURE WE ARE DONE SENDING
 	OUT0	(SD_TRDR),C		; PUT BYTE IN BUFFER
@@ -2059,7 +2098,7 @@ SD_GET:
 #IF (SDMODE == SDMODE_MT)
 	IN	A,(SD_RDTR)
 #ELSE
-  #IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+  #IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 	CALL	SD_WAITTX		; MAKE SURE WE ARE DONE SENDING
 	IN0	A,(SD_CNTR)		; GET CSIO STATUS
 	SET	5,A			; START RECEIVER
@@ -2153,7 +2192,7 @@ SD_GET1:
 ;
 ; SET CSIO TO DEFAULT SPEED
 ;
-#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX))
 ;
 SD_CSIO_DEF:
 	; SET CSIO FOR DEFAULT OPERATION
@@ -2406,7 +2445,7 @@ SD_DSKBUF	.DW	0		; ADR OF ACTIVE DISK BUFFER
 ; MSB<-->LSB MIRROR BITS IN A, RESULT IN C
 ;
 MIRROR:
-#IF (((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC)) & SDCSIOFAST)
+#IF (((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX)) & SDCSIOFAST)
 					; FASTEST BUT USES MOST CODE SPACE
 	LD	BC,MIRTAB		; 256 BYTE MIRROR TABLE
 	ADD	A,C			; ADD OFFSET
@@ -2439,7 +2478,7 @@ MIRROR2:
 ;
 ; LOOKUP TABLE TO MIRROR BITS IN A BYTE
 ;
-#IF (((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC)) & SDCSIOFAST)
+#IF (((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC) | (SDMODE == SDMODE_EPITX)) & SDCSIOFAST)
 
 MIRTAB	.DB 00H, 80H, 40H, 0C0H, 20H, 0A0H, 60H, 0E0H, 10H, 90H, 50H, 0D0H, 30H, 0B0H, 70H, 0F0H
 	.DB 08H, 88H, 48H, 0C8H, 28H, 0A8H, 68H, 0E8H, 18H, 98H, 58H, 0D8H, 38H, 0B8H, 78H, 0F8H

Source/HBIOS/std.asm

@@ -197,6 +197,7 @@ SDMODE_MT	.EQU	9		; MT (Shift register SPI WIZNET for RCBUS)
 SDMODE_USR	.EQU	10		; USER DEFINED (in sd.asm) (NOT COMPLETE)
 SDMODE_PIO	.EQU	11		; Z80 PIO bitbang
 SDMODE_Z80R	.EQU	12		; Z80 Retro
+SDMODE_EPITX	.EQU	13		; Mini ITX Z180
 ;
 ; AY SOUND CHIP MODE SELECTIONS
 ;