Added VIC20 port changes from Steve Schmidtke
git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
parent
195feebc00
commit
f0d89e09bc
28 changed files with 966 additions and 3 deletions
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@ -73,6 +73,10 @@ More special thanks to:
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for help with preliminary Oric Atmos support.
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* Steve Schmidtke <steve_schmidtke@hotmail.com>
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Steve contributed the VIC20 port.
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Thanks to
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@ -48,6 +48,8 @@
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/* Load the system specific files here, if needed */
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#if defined(__C64__) && !defined(_C64_H)
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# include <c64.h>
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#elif defined(__VIC20__) && !defined(_VIC20_H)
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# include <vic20.h>
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#elif defined(__C128__) && !defined(_C128_H)
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# include <c128.h>
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#elif defined(__PLUS4__) && !defined(_PLUS4_H)
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@ -39,7 +39,7 @@
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/* Define __JOYSTICK__ for systems that support a joystick */
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#if defined(__ATARI__) || defined(__C64__) || defined(__C128__) || defined(__PLUS4__) || defined(__CBM510__)
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#if defined(__ATARI__) || defined(__C64__) || defined(__C128__) || defined(__PLUS4__) || defined(__CBM510__) || defined(__VIC20__)
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# define __JOYSTICK__
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#else
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# error The target system does not support a joystick!
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89
include/vic20.h
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89
include/vic20.h
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@ -0,0 +1,89 @@
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/*****************************************************************************/
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/* */
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/* vic20.h */
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/* */
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/* vic20 system specific definitions */
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/* */
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/* */
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/* */
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/* (C) 1998-2001 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef _VIC20_H
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#define _VIC20_H
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/* Check for errors */
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#if !defined(__VIC20__)
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# error This module may only be used when compiling for the Vic20!
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#endif
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/* Additional key defines */
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#define CH_F1 133
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#define CH_F2 137
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#define CH_F3 134
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#define CH_F4 138
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#define CH_F5 135
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#define CH_F6 139
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#define CH_F7 136
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#define CH_F8 140
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/* Color defines */
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#define COLOR_BLACK 0x00
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#define COLOR_WHITE 0x01
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#define COLOR_RED 0x02
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#define COLOR_CYAN 0x03
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#define COLOR_VIOLET 0x04
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#define COLOR_GREEN 0x05
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#define COLOR_BLUE 0x06
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#define COLOR_YELLOW 0x07
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#define COLOR_ORANGE 0x08
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#define COLOR_BROWN 0x09
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#define COLOR_LIGHTRED 0x0A
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#define COLOR_GRAY1 0x0B
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#define COLOR_GRAY2 0x0C
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#define COLOR_LIGHTGREEN 0x0D
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#define COLOR_LIGHTBLUE 0x0E
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#define COLOR_GRAY3 0x0F
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/* Define special memory areas */
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#define COLOR_RAM ((unsigned char*)0x9600)
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/* End of vic20.h */
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#endif
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@ -15,6 +15,7 @@ LD = ../../src/ld65/ld65
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ALLTARGETS = apple2lib \
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atarilib \
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atmoslib \
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vic20lib \
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c64lib \
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c128lib \
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cbm510lib \
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@ -78,6 +79,22 @@ atmoslib:
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$(AR) a atmos.lib $$i/*.o;\
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done
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#-----------------------------------------------------------------------------
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# Vic20
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vic20lib:
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for i in vic20 cbm common runtime conio dbg; do \
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CC=$(CC) \
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AS=$(AS) \
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CFLAGS="-Osir -g -T -t c64 -I../../include" \
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AFLAGS="-t c64" \
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$(MAKE) -C $$i || exit 1; \
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done
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mv vic20/crt0.o vic20.o
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for i in vic20 cbm common runtime conio dbg; do \
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$(AR) a vic20.lib $$i/*.o;\
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done
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#-----------------------------------------------------------------------------
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# C64
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1
libsrc/vic20/.cvsignore
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1
libsrc/vic20/.cvsignore
Normal file
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*.tgi
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30
libsrc/vic20/Makefile
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30
libsrc/vic20/Makefile
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#
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# makefile for CC65 runtime library
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#
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.SUFFIXES: .o .s .c
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%.o: %.c
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@$(CC) $(CFLAGS) $<
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@$(AS) -o $@ $(AFLAGS) $(*).s
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%.o: %.s
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@$(AS) -g -o $@ $(AFLAGS) $<
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OBJS = _scrsize.o \
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break.o \
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crt0.o \
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cgetc.o \
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clrscr.o \
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color.o \
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conio.o \
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cputc.o \
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kbhit.o \
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readjoy.o \
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write.o
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all: $(OBJS)
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clean:
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@rm -f $(OBJS)
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25
libsrc/vic20/_scrsize.s
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25
libsrc/vic20/_scrsize.s
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;
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; Ullrich von Bassewitz, 26.10.2000
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;
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; Screen size variables
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;
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.export xsize, ysize
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.constructor initscrsize
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.include "../cbm/cbm.inc"
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.code
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initscrsize:
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jsr SCREEN
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stx xsize
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sty ysize
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rts
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.bss
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xsize: .res 1
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ysize: .res 1
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108
libsrc/vic20/break.s
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108
libsrc/vic20/break.s
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;
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; Ullrich von Bassewitz, 27.09.1998
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;
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; void set_brk (unsigned Addr);
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; void reset_brk (void);
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;
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.export _set_brk, _reset_brk
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.destructor _reset_brk
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.export _brk_a, _brk_x, _brk_y, _brk_sr, _brk_pc
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.include "vic20.inc"
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.bss
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_brk_a: .res 1
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_brk_x: .res 1
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_brk_y: .res 1
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_brk_sr: .res 1
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_brk_pc: .res 2
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oldvec: .res 2 ; Old vector
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.data
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uservec: jmp $FFFF ; Patched at runtime
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.code
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; Set the break vector
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.proc _set_brk
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sta uservec+1
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stx uservec+2 ; Set the user vector
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lda oldvec
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ora oldvec+1 ; Did we save the vector already?
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bne L1 ; Jump if we installed the handler already
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lda BRKVec
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sta oldvec
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lda BRKVec+1
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sta oldvec+1 ; Save the old vector
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L1: lda #<brk_handler ; Set the break vector to our routine
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ldx #>brk_handler
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sta BRKVec
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stx BRKVec+1
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rts
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.endproc
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; Reset the break vector
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.proc _reset_brk
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lda oldvec
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ldx oldvec+1
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beq @L9 ; Jump if vector not installed
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sta BRKVec
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stx BRKVec+1
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lda #$00
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sta oldvec ; Clear the old vector
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stx oldvec+1
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@L9: rts
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.endproc
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; Break handler, called if a break occurs
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.proc brk_handler
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pla
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sta _brk_y
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pla
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sta _brk_x
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pla
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sta _brk_a
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pla
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and #$EF ; Clear break bit
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sta _brk_sr
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pla ; PC low
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sec
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sbc #2 ; Point to start of brk
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sta _brk_pc
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pla ; PC high
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sbc #0
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sta _brk_pc+1
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jsr uservec ; Call the user's routine
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lda _brk_pc+1
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pha
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lda _brk_pc
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pha
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lda _brk_sr
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pha
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ldx _brk_x
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ldy _brk_y
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lda _brk_a
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rti ; Jump back...
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.endproc
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61
libsrc/vic20/cgetc.s
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61
libsrc/vic20/cgetc.s
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;
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; Ullrich von Bassewitz, 06.08.1998
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;
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; char cgetc (void);
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;
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.export _cgetc
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.import cursor
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.include "vic20.inc"
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_cgetc: lda KEY_COUNT ; Get number of characters
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bne L3 ; Jump if there are already chars waiting
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; Switch on the cursor if needed
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lda CURS_FLAG
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pha
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lda cursor
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jsr setcursor
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L1: lda KEY_COUNT
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beq L1
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ldx #0
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pla
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bne L2
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inx
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L2: txa
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jsr setcursor
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L3: jsr KBDREAD ; Read char and return in A
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ldx #0
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rts
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; Switch the cursor on or off
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.proc setcursor
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tax ; On or off?
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bne seton ; Go set it on
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lda CURS_FLAG ; Is the cursor currently off?
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bne crs9 ; Jump if yes
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lda #1
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sta CURS_FLAG ; Mark it as off
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lda CURS_STATE ; Cursor currently displayed?
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beq crs8 ; Jump if no
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ldy CURS_X ; Get the character column
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lda (SCREEN_PTR),y ; Get character
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eor #$80
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sta (SCREEN_PTR),y ; Store character back
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lda CURS_COLOR
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sta (CRAM_PTR),y ; Store color back
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crs8: lda #0
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sta CURS_STATE ; Cursor not displayed
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crs9: rts
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seton: lda #0
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sta CURS_FLAG
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rts
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.endproc
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14
libsrc/vic20/clrscr.s
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14
libsrc/vic20/clrscr.s
Normal file
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;
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; Ullrich von Bassewitz, 06.08.1998
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;
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; void clrscr (void);
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;
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.export _clrscr
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.include "vic20.inc"
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_clrscr = CLRSCR
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61
libsrc/vic20/color.s
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61
libsrc/vic20/color.s
Normal file
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;
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; Ullrich von Bassewitz, 06.08.1998
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; Adapted for Vic20 by Steve Schmidtke 05.08.2002
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;
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; unsigned char __fastcall__ textcolor (unsigned char color);
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; unsigned char __fastcall__ bgcolor (unsigned char color);
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; unsigned char __fastcall__ bordercolor (unsigned char color);
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;
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.export _textcolor, _bgcolor, _bordercolor
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.include "vic20.inc"
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.bss
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clr_tmp: .res 1 ; tempory storage for bitfield ops
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.code
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_textcolor:
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ldx CHARCOLOR ; get old value
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sta CHARCOLOR ; set new value
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txa
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rts
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_bgcolor:
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asl
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asl
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asl
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asl
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sei ; don't want anything messing around while we update
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sta clr_tmp
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lda VIC_COLOR ; get old value
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and #$0F
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tax
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ora clr_tmp
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sta VIC_COLOR ; set new value
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cli
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txa
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lsr
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lsr
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lsr
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lsr
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rts
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_bordercolor:
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and #$07
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sei ; don't want anything messing around while we update
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sta clr_tmp
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lda VIC_COLOR ; get old value
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and #$F8
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tax
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ora clr_tmp
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sta VIC_COLOR ; set new value
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cli
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txa
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rts
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10
libsrc/vic20/conio.s
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10
libsrc/vic20/conio.s
Normal file
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;
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; Ullrich von Bassewitz, 06.08.1998
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;
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; Low level stuff for screen output/console input
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;
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.exportzp CURS_X, CURS_Y
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.include "vic20.inc"
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105
libsrc/vic20/cputc.s
Normal file
105
libsrc/vic20/cputc.s
Normal file
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@ -0,0 +1,105 @@
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;
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; Ullrich von Bassewitz, 06.08.1998
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;
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; void cputcxy (unsigned char x, unsigned char y, char c);
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; void cputc (char c);
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;
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.export _cputcxy, _cputc, cputdirect, putchar
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.export newline, plot
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.import popa, _gotoxy
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.import xsize, revers
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.include "vic20.inc"
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.include "../cbm/cbm.inc"
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_cputcxy:
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pha ; Save C
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jsr popa ; Get Y
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jsr _gotoxy ; Set cursor, drop x
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pla ; Restore C
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; Plot a character - also used as internal function
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_cputc: cmp #$0A ; CR?
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bne L1
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lda #0
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sta CURS_X
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beq plot ; Recalculate pointers
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L1: cmp #$0D ; LF?
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beq newline ; Recalculate pointers
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; Printable char of some sort
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cmp #' '
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bcc cputdirect ; Other control char
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tay
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bmi L10
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cmp #$60
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bcc L2
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and #$DF
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bne cputdirect ; Branch always
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L2: and #$3F
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cputdirect:
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jsr putchar ; Write the character to the screen
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; Advance cursor position
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advance:
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iny
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cpy xsize
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bne L3
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jsr newline ; new line
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ldy #0 ; + cr
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L3: sty CURS_X
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rts
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newline:
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clc
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lda xsize
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adc SCREEN_PTR
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sta SCREEN_PTR
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bcc L4
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inc SCREEN_PTR+1
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clc
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L4: lda xsize
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adc CRAM_PTR
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sta CRAM_PTR
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bcc L5
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inc CRAM_PTR+1
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L5: inc CURS_Y
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rts
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; Handle character if high bit set
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|
||||
L10: and #$7F
|
||||
cmp #$7E ; PI?
|
||||
bne L11
|
||||
lda #$5E ; Load screen code for PI
|
||||
bne cputdirect
|
||||
L11: ora #$40
|
||||
bne cputdirect
|
||||
|
||||
|
||||
|
||||
; Set cursor position, calculate RAM pointers
|
||||
|
||||
plot: ldy CURS_X
|
||||
ldx CURS_Y
|
||||
clc
|
||||
jmp PLOT ; Set the new cursor
|
||||
|
||||
|
||||
|
||||
; Write one character to the screen without doing anything else, return X
|
||||
; position in Y
|
||||
|
||||
putchar:
|
||||
ora revers ; Set revers bit
|
||||
ldy CURS_X
|
||||
sta (SCREEN_PTR),y ; Set char
|
||||
lda CHARCOLOR
|
||||
sta (CRAM_PTR),y ; Set color
|
||||
rts
|
137
libsrc/vic20/crt0.s
Normal file
137
libsrc/vic20/crt0.s
Normal file
|
@ -0,0 +1,137 @@
|
|||
;
|
||||
; Startup code for cc65 (Vic20 version)
|
||||
;
|
||||
; This must be the *first* file on the linker command line
|
||||
;
|
||||
|
||||
.export _exit
|
||||
.import initlib, donelib
|
||||
.import zerobss, push0
|
||||
.import _main
|
||||
.import __RAM_START__, __RAM_SIZE__ ; Linker generated
|
||||
|
||||
.include "vic20.inc"
|
||||
.include "../cbm/cbm.inc"
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; Define and export the ZP variables for the Vic20 runtime
|
||||
|
||||
.exportzp sp, sreg, regsave
|
||||
.exportzp ptr1, ptr2, ptr3, ptr4
|
||||
.exportzp tmp1, tmp2, tmp3, tmp4
|
||||
.exportzp regbank, zpspace
|
||||
|
||||
.zeropage
|
||||
|
||||
zpstart = *
|
||||
sp: .res 2 ; Stack pointer
|
||||
sreg: .res 2 ; Secondary register/high 16 bit for longs
|
||||
regsave: .res 4 ; slot to save/restore (E)AX into
|
||||
ptr1: .res 2
|
||||
ptr2: .res 2
|
||||
ptr3: .res 2
|
||||
ptr4: .res 2
|
||||
tmp1: .res 1
|
||||
tmp2: .res 1
|
||||
tmp3: .res 1
|
||||
tmp4: .res 1
|
||||
regbank: .res 6 ; 6 byte register bank
|
||||
|
||||
zpspace = * - zpstart ; Zero page space allocated
|
||||
|
||||
.code
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; BASIC header with a SYS call
|
||||
|
||||
.org $FFF
|
||||
.word Head ; Load address
|
||||
Head: .word @Next
|
||||
.word 1000 ; Line number
|
||||
.byte $9E,"4109" ; SYS 2061
|
||||
.byte $00 ; End of BASIC line
|
||||
@Next: .word 0 ; BASIC end marker
|
||||
.reloc
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; Actual code
|
||||
|
||||
ldx #zpspace-1
|
||||
L1: lda sp,x
|
||||
sta zpsave,x ; Save the zero page locations we need
|
||||
dex
|
||||
bpl L1
|
||||
|
||||
; Close open files
|
||||
|
||||
jsr CLRCH
|
||||
|
||||
; Switch to second charset
|
||||
|
||||
lda #14
|
||||
jsr BSOUT
|
||||
|
||||
; Clear the BSS data
|
||||
|
||||
jsr zerobss
|
||||
|
||||
; Save system stuff and setup the stack
|
||||
|
||||
tsx
|
||||
stx spsave ; Save the system stack ptr
|
||||
|
||||
; lda $01
|
||||
; sta mmusave ; Save the memory configuration
|
||||
; and #$F8
|
||||
; ora #$06 ; Enable kernal+I/O, disable basic
|
||||
; sta $01
|
||||
|
||||
lda #<(__RAM_START__ + __RAM_SIZE__)
|
||||
sta sp
|
||||
lda #>(__RAM_START__ + __RAM_SIZE__)
|
||||
sta sp+1 ; Set argument stack ptr
|
||||
|
||||
; Call module constructors
|
||||
|
||||
jsr initlib
|
||||
|
||||
; Pass an empty command line
|
||||
|
||||
jsr push0 ; argc
|
||||
jsr push0 ; argv
|
||||
|
||||
ldy #4 ; Argument size
|
||||
jsr _main ; call the users code
|
||||
|
||||
; Call module destructors. This is also the _exit entry.
|
||||
|
||||
_exit: jsr donelib ; Run module destructors
|
||||
|
||||
; Restore system stuff
|
||||
|
||||
ldx spsave
|
||||
txs ; Restore stack pointer
|
||||
; lda mmusave
|
||||
; sta $01 ; Restore memory configuration
|
||||
|
||||
; Copy back the zero page stuff
|
||||
|
||||
ldx #zpspace-1
|
||||
L2: lda zpsave,x
|
||||
sta sp,x
|
||||
dex
|
||||
bpl L2
|
||||
|
||||
; Reset changed vectors, back to basic
|
||||
|
||||
jmp RESTOR
|
||||
|
||||
|
||||
.data
|
||||
|
||||
zpsave: .res zpspace
|
||||
|
||||
.bss
|
||||
|
||||
spsave: .res 1
|
||||
mmusave:.res 1
|
20
libsrc/vic20/kbhit.s
Normal file
20
libsrc/vic20/kbhit.s
Normal file
|
@ -0,0 +1,20 @@
|
|||
;
|
||||
; Ullrich von Bassewitz, 06.08.1998
|
||||
;
|
||||
; int kbhit (void);
|
||||
;
|
||||
|
||||
.export _kbhit
|
||||
.import return0, return1
|
||||
|
||||
.include "vic20.inc"
|
||||
|
||||
_kbhit:
|
||||
lda KEY_COUNT ; Get number of characters
|
||||
bne L1
|
||||
jmp return0
|
||||
L1: jmp return1
|
||||
|
||||
|
||||
|
||||
|
51
libsrc/vic20/read.s
Normal file
51
libsrc/vic20/read.s
Normal file
|
@ -0,0 +1,51 @@
|
|||
;
|
||||
; Ullrich von Bassewitz, 30.05.1998
|
||||
;
|
||||
; int read (int fd, void* buf, int count);
|
||||
;
|
||||
; THIS IS A HACK!
|
||||
;
|
||||
|
||||
.export _read
|
||||
.import popax
|
||||
.importzp ptr1, ptr2, ptr3
|
||||
|
||||
.include "../cbm/cbm.inc"
|
||||
|
||||
_read: jsr popax ; get count
|
||||
sta ptr2
|
||||
stx ptr2+1 ; save it for later
|
||||
jsr popax ; get buf
|
||||
sta ptr1
|
||||
stx ptr1+1
|
||||
jsr popax ; get fd and discard it
|
||||
lda #0
|
||||
sta ptr3
|
||||
sta ptr3+1 ; set count
|
||||
|
||||
L1: lda ptr2
|
||||
ora ptr2+1 ; count zero?
|
||||
beq L9
|
||||
dec ptr2
|
||||
bne L1a
|
||||
dec ptr2+1
|
||||
L1a: jsr BASIN
|
||||
ldy #0
|
||||
sta (ptr1),y ; save char
|
||||
inc ptr1
|
||||
bne L2
|
||||
inc ptr1+1
|
||||
L2: inc ptr3 ; increment count
|
||||
bne L3
|
||||
inc ptr3+1
|
||||
L3: cmp #$0D ; CR?
|
||||
bne L1
|
||||
|
||||
; Done, return the count
|
||||
|
||||
L9: lda ptr3
|
||||
ldx ptr3+1
|
||||
rts
|
||||
|
||||
|
||||
|
73
libsrc/vic20/readjoy.s
Normal file
73
libsrc/vic20/readjoy.s
Normal file
|
@ -0,0 +1,73 @@
|
|||
;
|
||||
; Ullrich von Bassewitz, 23.09.1998
|
||||
; Adapted for Vic20 by Steve Schmidtke 05.08.2002
|
||||
;
|
||||
; unsigned readjoy (unsigned char joy);
|
||||
;
|
||||
|
||||
.export _readjoy
|
||||
|
||||
.include "vic20.inc"
|
||||
|
||||
|
||||
.proc _readjoy
|
||||
|
||||
tax ; Joystick number into X
|
||||
bne joy2
|
||||
|
||||
; Read joystick 1
|
||||
|
||||
joy1: lda #$7F
|
||||
ldx #$C3
|
||||
sei ; necessary?
|
||||
ldy VIA1_DDRA
|
||||
stx VIA1_DDRA
|
||||
ldx VIA1_JOY
|
||||
sty VIA1_DDRA
|
||||
ldy VIA2_DDRB
|
||||
sta VIA2_DDRB
|
||||
lda VIA2_JOY ; sw3 happens to be the 7th bit (i.e negative)
|
||||
sty VIA2_DDRB
|
||||
cli ; necessary?
|
||||
; all this mess below tries to normalize the returned results (see joystick.h)
|
||||
; by shifting bits around and inserting switch3 (right).
|
||||
; easier (and far smaller) would have been just to return the bits where they
|
||||
; lay and just #ifdef different joystick constants for the Vic20.
|
||||
bmi s3_off ; must stay valid from the VIA2_JOY load
|
||||
txa ; state: sw3 on, fire ?
|
||||
and #$20 ; find out if fire has been pressed
|
||||
bne f_off1
|
||||
txa ; state: sw3 on, fire on
|
||||
lsr
|
||||
lsr
|
||||
and #$07
|
||||
eor #$1F
|
||||
rts
|
||||
f_off1: txa ; state: sw3 on, fire off
|
||||
lsr
|
||||
lsr
|
||||
and #$07
|
||||
eor #$0F
|
||||
rts
|
||||
s3_off: txa ; state: sw3 off, fire ?
|
||||
and #$20 ; find out if fire has been pressed
|
||||
bne f_off2 ; yeah, that's just about my sentiment by now
|
||||
txa ; state: sw3 off, fire on
|
||||
lsr
|
||||
lsr
|
||||
and #$07
|
||||
eor #$17
|
||||
rts
|
||||
f_off2: txa ; state: sw3 off, fire off
|
||||
lsr
|
||||
lsr
|
||||
and #$07
|
||||
eor #$07
|
||||
rts
|
||||
|
||||
; Read joystick 2 + (just return joy1)
|
||||
|
||||
joy2: jmp joy1 ; stub for more joysticks (pointless?)
|
||||
|
||||
.endproc
|
||||
|
67
libsrc/vic20/vic20.inc
Normal file
67
libsrc/vic20/vic20.inc
Normal file
|
@ -0,0 +1,67 @@
|
|||
;
|
||||
; Vic20 generic definitions. Stolen mostly from c64.inc - Steve Schmidtke
|
||||
;
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; Zero page, Commodore stuff
|
||||
|
||||
ST = $90 ; IEC status byte
|
||||
|
||||
FNAM_LEN = $B7 ; Length of filename
|
||||
SECADR = $B9 ; Secondary address
|
||||
DEVNUM = $BA ; Device number
|
||||
KEY_COUNT = $C6 ; Number of keys in input buffer
|
||||
CURS_FLAG = $CC ; 1 = cursor off
|
||||
CURS_BLINK = $CD ; Blink counter
|
||||
CURS_CHAR = $CE ; Character under the cursor
|
||||
CURS_COLOR = $287 ; Color under the cursor
|
||||
CURS_STATE = $CF ; Cursor blink state
|
||||
SCREEN_PTR = $D1 ; Pointer to current char in text screen
|
||||
CURS_X = $D3 ; Cursor column
|
||||
CURS_Y = $D6 ; Cursor row
|
||||
CRAM_PTR = $F3 ; Pointer to current char in color RAM
|
||||
|
||||
CHARCOLOR = $286
|
||||
PALFLAG = $2A6 ; $01 = PAL, $00 = NTSC
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; Kernal routines
|
||||
|
||||
; Direct entries
|
||||
CLRSCR = $E55F
|
||||
KBDREAD = $E5CF
|
||||
NAMED_OPEN = $F495
|
||||
NAMED_CLOSE = $F6DA
|
||||
PLOTCHAR = $EAAA ; Char in A, color in X
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; Vector and other locations
|
||||
|
||||
IRQVec = $0314
|
||||
BRKVec = $0316
|
||||
NMIVec = $0318
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; I/O: 6560 VIC
|
||||
|
||||
VIC = $9000
|
||||
VIC_COLOR = $900F
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; I/O: 6522 VIA1
|
||||
|
||||
VIA1 = $9110
|
||||
VIA1_JOY = $9111
|
||||
VIA1_DDRB = $9112
|
||||
VIA1_DDRA = $9113
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; I/O: 6522 VIA2
|
||||
|
||||
VIA2 = $9120
|
||||
VIA2_JOY = $9120
|
||||
VIA2_DDRB = $9122
|
||||
VIA2_DDRA = $9123
|
||||
|
47
libsrc/vic20/write.s
Normal file
47
libsrc/vic20/write.s
Normal file
|
@ -0,0 +1,47 @@
|
|||
;
|
||||
; Ullrich von Bassewitz, 30.05.1998
|
||||
;
|
||||
; int write (int fd, const void* buf, int count);
|
||||
;
|
||||
; THIS IS A HACK!
|
||||
;
|
||||
|
||||
.export _write
|
||||
.import popax
|
||||
.importzp ptr1, ptr2, ptr3
|
||||
|
||||
.include "../cbm/cbm.inc"
|
||||
|
||||
_write: jsr popax ; get count
|
||||
sta ptr2
|
||||
stx ptr2+1 ; save it for later
|
||||
sta ptr3
|
||||
stx ptr3+1 ; save for function result
|
||||
jsr popax ; get buf
|
||||
sta ptr1
|
||||
stx ptr1+1
|
||||
jsr popax ; get fd and discard it
|
||||
|
||||
L1: lda ptr2
|
||||
ora ptr2+1 ; count zero?
|
||||
beq L9
|
||||
ldy #0
|
||||
lda (ptr1),y
|
||||
jsr BSOUT
|
||||
inc ptr1
|
||||
bne L2
|
||||
inc ptr1+1
|
||||
L2: lda ptr2
|
||||
bne L3
|
||||
dec ptr2
|
||||
dec ptr2+1
|
||||
jmp L1
|
||||
L3: dec ptr2
|
||||
jmp L1
|
||||
|
||||
; No error, return count
|
||||
|
||||
L9: lda ptr3
|
||||
ldx ptr3+1
|
||||
rts
|
||||
|
|
@ -152,6 +152,10 @@ static void SetSys (const char* Sys)
|
|||
cbmsys ("__C64__");
|
||||
break;
|
||||
|
||||
case TGT_VIC20:
|
||||
cbmsys ("__VIC20__");
|
||||
break;
|
||||
|
||||
case TGT_C128:
|
||||
cbmsys ("__C128__");
|
||||
break;
|
||||
|
|
|
@ -55,6 +55,7 @@ const char* TargetNames [TGT_COUNT] = {
|
|||
"none",
|
||||
"module",
|
||||
"atari",
|
||||
"vic20",
|
||||
"c64",
|
||||
"c128",
|
||||
"ace",
|
||||
|
@ -106,4 +107,4 @@ target_t FindTarget (const char* Name)
|
|||
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
|
@ -50,6 +50,7 @@ typedef enum {
|
|||
TGT_NONE,
|
||||
TGT_MODULE,
|
||||
TGT_ATARI,
|
||||
TGT_VIC20,
|
||||
TGT_C64,
|
||||
TGT_C128,
|
||||
TGT_ACE,
|
||||
|
|
|
@ -143,6 +143,7 @@ void TgtTranslateInit (void)
|
|||
case TGT_NONE: memcpy (Tab, CTNone, sizeof (Tab)); break;
|
||||
case TGT_MODULE: memcpy (Tab, CTNone, sizeof (Tab)); break;
|
||||
case TGT_ATARI: memcpy (Tab, CTAtari, sizeof (Tab)); break;
|
||||
case TGT_VIC20: memcpy (Tab, CTPET, sizeof (Tab)); break;
|
||||
case TGT_C64: memcpy (Tab, CTPET, sizeof (Tab)); break;
|
||||
case TGT_C128: memcpy (Tab, CTPET, sizeof (Tab)); break;
|
||||
case TGT_ACE: memcpy (Tab, CTPET, sizeof (Tab)); break;
|
||||
|
|
|
@ -16,3 +16,4 @@ lunix.inc
|
|||
none.inc
|
||||
pet.inc
|
||||
plus4.inc
|
||||
vic20.inc
|
||||
|
|
27
src/ld65/cfg/vic20.cfg
Normal file
27
src/ld65/cfg/vic20.cfg
Normal file
|
@ -0,0 +1,27 @@
|
|||
MEMORY {
|
||||
ZP: start = $02, size = $1A, type = rw, define = yes;
|
||||
RAM: start = $FFF, size = $0E01, define = yes, file = %O;
|
||||
}
|
||||
SEGMENTS {
|
||||
CODE: load = RAM, type = wprot;
|
||||
RODATA: load = RAM, type = wprot;
|
||||
DATA: load = RAM, type = rw;
|
||||
BSS: load = RAM, type = bss, define = yes;
|
||||
ZEROPAGE: load = ZP, type = zp;
|
||||
}
|
||||
FEATURES {
|
||||
CONDES: segment = RODATA,
|
||||
type = constructor,
|
||||
label = __CONSTRUCTOR_TABLE__,
|
||||
count = __CONSTRUCTOR_COUNT__;
|
||||
CONDES: segment = RODATA,
|
||||
type = destructor,
|
||||
label = __DESTRUCTOR_TABLE__,
|
||||
count = __DESTRUCTOR_COUNT__;
|
||||
}
|
||||
SYMBOLS {
|
||||
__STACKSIZE__ = $400; # 1K stack
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -59,7 +59,8 @@ INCS = apple2.inc \
|
|||
module.inc \
|
||||
none.inc \
|
||||
pet.inc \
|
||||
plus4.inc
|
||||
plus4.inc \
|
||||
vic20.inc
|
||||
|
||||
# -----------------------------------------------------------------------------
|
||||
#
|
||||
|
@ -146,4 +147,7 @@ pet.inc: cfg/pet.cfg
|
|||
plus4.inc: cfg/plus4.cfg
|
||||
@$(CVT) $< $@ CfgPlus4
|
||||
|
||||
vic20.inc: cfg/vic20.cfg
|
||||
@$(CVT) $< $@ CfgVic20
|
||||
|
||||
|
||||
|
|
|
@ -62,6 +62,7 @@ static const char CfgEmpty[] = "";
|
|||
#include "none.inc"
|
||||
#include "pet.inc"
|
||||
#include "plus4.inc"
|
||||
#include "vic20.inc"
|
||||
|
||||
|
||||
|
||||
|
@ -76,6 +77,7 @@ const TargetDesc Targets [TGT_COUNT] = {
|
|||
{ BINFMT_BINARY, CfgNone },
|
||||
{ BINFMT_O65, CfgModule },
|
||||
{ BINFMT_BINARY, CfgAtari },
|
||||
{ BINFMT_BINARY, CfgVic20 },
|
||||
{ BINFMT_BINARY, CfgC64 },
|
||||
{ BINFMT_BINARY, CfgC128 },
|
||||
{ BINFMT_BINARY, CfgEmpty }, /* Ace */
|
||||
|
|
Loading…
Add table
Reference in a new issue