Added Commodore plus4

This commit is contained in:
Stefan Wessels 2023-10-04 15:44:35 -07:00
parent 3766cbc902
commit 4e20bcf3a4
8 changed files with 1583 additions and 2 deletions

View File

@ -149,11 +149,11 @@ TARGETOBJDIR := $(OBJDIR)/$(TARGETS)
# Default emulator commands and options for particular targets.
# Set EMUCMD to override.
c64_EMUCMD := $(VICE_HOME)x64 -kernal kernal -VICIIdsize -autostart
c64_EMUCMD := $(VICE_HOME)x64sc -kernal kernal -VICIIdsize -autostart
c128_EMUCMD := $(VICE_HOME)x128 -kernal kernal -VICIIdsize -autoload
vic20_EMUCMD := $(VICE_HOME)xvic -kernal kernal -VICdsize -autoload
pet_EMUCMD := $(VICE_HOME)xpet -Crtcdsize -autoload
plus4_EMUCMD := $(VICE_HOME)xplus4 -TEDdsize -autoload
plus4_EMUCMD := $(VICE_HOME)xplus4 -TEDdsize -autostart
# So far there is no x16 emulator in VICE (why??) so we have to use xplus4 with -memsize option
c16_EMUCMD := $(VICE_HOME)xplus4 -ramsize 16 -TEDdsize -autoload
cbm510_EMUCMD := $(VICE_HOME)xcbm2 -model 510 -VICIIdsize -autoload

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@ -1,5 +1,6 @@
0. Updates
* Oct 2023 - Added a version for the Plus4.
* Jul 2020 - Added a version for the Atari.
* May 2020 - Advanced Build instructions at XI.
* May 2020 - I created a version for the Commander X16 (R37).

43
src/plus4/chessPlus4.cfg Normal file
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@ -0,0 +1,43 @@
FEATURES {
STARTADDRESS: default = $1001;
}
SYMBOLS {
__LOADADDR__: type = import;
__EXEHDR__: type = import;
__STACKSIZE__: type = weak, value = $0800; # 2k stack
__HIMEM__: type = weak, value = $FD00;
}
MEMORY {
ZP: file = "", define = yes, start = $0002, size = $001A;
LOADADDR: file = %O, start = %S - 2, size = $0002;
HEADER: file = %O, define = yes, start = %S, size = $000D;
MAIN: file = %O, define = yes, start = __HEADER_LAST__, size = __HIMEM__ - __MAIN_START__ - __STACKSIZE__;
}
SEGMENTS {
ZEROPAGE: load = ZP, type = zp;
LOADADDR: load = LOADADDR, type = ro;
EXEHDR: load = HEADER, type = ro;
STARTUP: load = MAIN, type = ro;
LOWCODE: load = MAIN, type = ro, optional = yes;
CODE: load = MAIN, type = ro;
ONCE: load = MAIN, type = ro, optional = yes;
RODATA: load = MAIN, type = ro;
DATA: load = MAIN, type = rw;
INIT: load = MAIN, type = bss;
BSS: load = MAIN, type = bss, define = yes;
}
FEATURES {
CONDES: type = constructor,
label = __CONSTRUCTOR_TABLE__,
count = __CONSTRUCTOR_COUNT__,
segment = ONCE;
CONDES: type = destructor,
label = __DESTRUCTOR_TABLE__,
count = __DESTRUCTOR_COUNT__,
segment = RODATA;
CONDES: type = interruptor,
label = __INTERRUPTOR_TABLE__,
count = __INTERRUPTOR_COUNT__,
segment = RODATA,
import = __CALLIRQ__;
}

202
src/plus4/dataPlus4.c Normal file
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@ -0,0 +1,202 @@
/*
* dataPlus4.c
* cc65 Chess
*
* Created by Stefan Wessels, February 2014.
*
*/
#include "../types.h"
#include "dataPlus4.h"
/*-----------------------------------------------------------------------*/
// Plus4 (C64) specific graphics for the chess pieces
// The comment shows an icon 16x24
// The data is 24 chars & 24 chars (2 * 8x24). The second set of 24
// is the right-hand side 8-bits of the icon
// 96 = 4 cols * 3 rows * 8 byte / col
const char gfxTiles[PAWN][2][96] =
{
{
{
0x00, 0x00, 0x00, 0x03, 0x02, 0x02, 0x02, 0x02,
0x00, 0x00, 0x00, 0xC7, 0x44, 0x44, 0x7C, 0x00,
0x00, 0x00, 0x00, 0xC7, 0x44, 0x44, 0x7C, 0x00,
0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x80, 0x5F, 0x60, 0x20, 0x20, 0x20, 0x20,
0x01, 0x02, 0xF4, 0x0C, 0x08, 0x08, 0x08, 0x08,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x00,
0x20, 0x40, 0x80, 0xBF, 0x00, 0xFF, 0xFF, 0x00,
0x08, 0x04, 0x02, 0xFA, 0x01, 0xFF, 0xFF, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x00,
},
{
0x00, 0x00, 0x00, 0x03, 0x03, 0x03, 0x03, 0x03,
0x00, 0x00, 0x00, 0xC7, 0xC7, 0xC7, 0xFF, 0xFF,
0x00, 0x00, 0x00, 0xC7, 0xC7, 0xC7, 0xFF, 0xFF,
0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0x7F, 0x40, 0x3F, 0x3F, 0x3F, 0x3F,
0xFF, 0xFE, 0xFC, 0x04, 0xF8, 0xF8, 0xF8, 0xF8,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x00,
0x3F, 0x7F, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0x00,
0xF8, 0xFC, 0xFE, 0xFE, 0x01, 0xFF, 0xFF, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x00,
},
},
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x08, 0x15, 0x21, 0x20, 0x40,
0x00, 0x00, 0x00, 0x80, 0x40, 0x20, 0x10, 0x08,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01, 0x02, 0x02, 0x01, 0x00,
0x44, 0x40, 0x80, 0x00, 0x00, 0x1E, 0x21, 0xC2,
0x28, 0x28, 0x34, 0x14, 0x04, 0x04, 0x16, 0x1A,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x04, 0x08, 0x10, 0x20, 0x5F, 0x40, 0x7F, 0x00,
0x09, 0x05, 0x01, 0x00, 0xFE, 0x00, 0xFF, 0x00,
0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00,
},
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x08, 0x15, 0x3E, 0x3F, 0x7F,
0x00, 0x00, 0x00, 0x80, 0x40, 0xE0, 0xF0, 0xF8,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x01, 0x00,
0x7B, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xE1, 0xC3,
0xD8, 0xD8, 0xCC, 0xEC, 0xFC, 0xFC, 0xEE, 0xE6,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x07, 0x0F, 0x1F, 0x3F, 0x40, 0x7F, 0x7F, 0x00,
0xF7, 0xFB, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0x00,
0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00,
},
},
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x03, 0x04, 0x08, 0x11,
0x00, 0x00, 0x00, 0x00, 0x80, 0x40, 0x20, 0x10,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x21, 0x2F, 0x41, 0x41, 0x41, 0x21, 0x20, 0x10,
0x08, 0xE8, 0x04, 0x04, 0x04, 0x08, 0x08, 0x10,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
0x0F, 0x08, 0x08, 0x07, 0x20, 0xFF, 0xFF, 0x00,
0xE0, 0x20, 0x20, 0xC0, 0x08, 0xFE, 0xFF, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x03, 0x07, 0x0F, 0x1E,
0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x3E, 0x30, 0x7E, 0x7E, 0x7E, 0x3E, 0x3F, 0x1F,
0xF8, 0x18, 0xFC, 0xFC, 0xFC, 0xF8, 0xF8, 0xF0,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
0x08, 0x0F, 0x0F, 0x07, 0x3F, 0x80, 0xFF, 0x00,
0x20, 0xE0, 0xE0, 0xC0, 0xF8, 0x02, 0xFF, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
},
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x03, 0x04, 0xE4, 0x12,
0x00, 0x00, 0x00, 0x00, 0x80, 0x40, 0x4E, 0x91,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x00,
0x14, 0x28, 0x00, 0x21, 0x33, 0x1F, 0x0F, 0x80,
0x50, 0x28, 0x00, 0x08, 0x98, 0xF1, 0xE1, 0x02,
0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x80, 0xBF, 0x40, 0x40, 0x40, 0x60, 0x3F, 0x00,
0x02, 0xFA, 0x04, 0x04, 0x04, 0x0C, 0xF8, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x03, 0x07, 0xE7, 0xF3,
0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xCE, 0x9F,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01, 0x00,
0xF7, 0xEF, 0xFF, 0xDE, 0xCC, 0xE0, 0xF0, 0xFF,
0xDF, 0xEF, 0xFF, 0xF7, 0x67, 0x0F, 0x1F, 0xFE,
0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xC0, 0x7F, 0x7F, 0x7F, 0x7F, 0x3F, 0x00,
0xFE, 0x06, 0xFC, 0xFC, 0xFC, 0xFC, 0xF8, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
},
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, 0x02, 0x0E, 0x0C, 0x32,
0x00, 0x00, 0x00, 0x80, 0x80, 0xE0, 0x60, 0x98,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x01, 0x02, 0x02, 0x02, 0x01,
0x4A, 0x86, 0x02, 0x24, 0x42, 0x41, 0x21, 0x10,
0xA4, 0xC2, 0x81, 0x49, 0x84, 0x04, 0x08, 0x11,
0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x08, 0x80, 0x9F, 0x40, 0x40, 0x60, 0x3F, 0x00,
0x21, 0x02, 0xF2, 0x04, 0x04, 0x0C, 0xF8, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, 0x02, 0x0E, 0x0C, 0x32,
0x00, 0x00, 0x00, 0x80, 0x80, 0xE0, 0x60, 0x98,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x01, 0x03, 0x03, 0x03, 0x01,
0x7A, 0xFE, 0xFC, 0xDA, 0xBC, 0xBE, 0xDF, 0xEF,
0xBC, 0xFE, 0x7F, 0xB7, 0x7B, 0xFB, 0xF7, 0xEF,
0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xF7, 0xFF, 0xC0, 0x7F, 0x7F, 0x7F, 0x3F, 0x00,
0xDF, 0xFE, 0x06, 0xFC, 0xFC, 0xFC, 0xF8, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
},
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x04, 0x08, 0x08, 0x08, 0x04, 0x03, 0x04, 0x04,
0x40, 0x20, 0x20, 0x20, 0x40, 0x80, 0x40, 0x40,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0C, 0x04, 0x04, 0x0F, 0x10, 0x3F, 0x3F, 0x00,
0x60, 0x40, 0x40, 0xE0, 0x10, 0xF8, 0xF8, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x07, 0x0F, 0x0F, 0x0F, 0x07, 0x03, 0x07, 0x07,
0xC0, 0xE0, 0xE0, 0xE0, 0xC0, 0x80, 0xC0, 0xC0,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0F, 0x07, 0x07, 0x0F, 0x10, 0x3F, 0x3F, 0x00,
0xE0, 0xC0, 0xC0, 0xE0, 0x10, 0xF8, 0xF8, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
},
};

14
src/plus4/dataPlus4.h Normal file
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@ -0,0 +1,14 @@
/*
* dataPlus4.h
* cc65 Chess
*
* Created by Stefan Wessels, February 2014.
*
*/
#ifndef _DATA_H_
#define _DATA_H_
extern const char gfxTiles[PAWN][2][96];
#endif //_DATA_H_

360
src/plus4/genpieces.cpp Normal file
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@ -0,0 +1,360 @@
/*
* genPieces.cpp
* cc65 Chess
*
* Created by Oliver Schmidt, January 2020.
* Pieces designed by Frank Gebhart, 1980s.
* Modified for C64 by S. Wessels, May 2020.
*
*/
#include <fcntl.h>
#ifdef _WIN32
#include <io.h>
#else
#include <unistd.h>
#endif
#include <stdio.h>
#include <memory.h>
char pieces[]=
" "
" "
" **** ***** **** "
" * * * * * * "
" * * * * * * "
" * ***** ***** * "
" * * "
" * * "
" * * "
" * ********* * "
" ** ** "
" * * "
" * * "
" * * "
" * * "
" * * "
" * * "
" * * "
" * *********** * "
" * * "
" ******************* "
" ******************* "
" "
" "
" "
" "
" **** ***** **** "
" **** ***** **** "
" **** ***** **** "
" ******************* "
" ******************* "
" ***************** "
" *************** "
" ************* "
" * * "
" *********** "
" *********** "
" *********** "
" *********** "
" *********** "
" ************* "
" *************** "
" *************** "
" * * "
" ******************* "
" ******************* "
" "
" "
" "
" "
" * * "
" * * * * "
" * * * "
" * * "
" * * "
" * * * * "
" * * * "
" * ** * "
" * * * "
" * * "
" * **** * "
" * * * * ** "
" ** * ** * "
" * * * "
" * * * "
" * ** "
" * * "
" * ************ * "
" * * "
" **************** "
" "
" "
" "
" "
" * * "
" * * * * "
" ***** *** "
" ********** "
" ************ "
" **** **** ** "
" ********* ** "
" ********** ** "
" ************ ** "
" **************** "
" **************** "
" **** **** *** "
" ** ***** ** "
" ******* *** "
" ********* ** "
" ************** "
" *************** "
" * * "
" **************** "
" **************** "
" "
" "
" "
" "
" "
" *** "
" * * "
" * * "
" * * * "
" * * * "
" * ******* * "
" * * * "
" * * * "
" * * * "
" * * * "
" * * "
" * * "
" ******* "
" * * "
" * * "
" ***** "
" * * "
" *************** "
" ***************** "
" "
" "
" "
" "
" "
" *** "
" ***** "
" ******* "
" **** **** "
" ***** ***** "
" ** ** "
" ****** ****** "
" ****** ****** "
" ****** ****** "
" ***** ***** "
" *********** "
" ********* "
" * * "
" ******* "
" ******* "
" ***** "
" *********** "
" * * "
" ***************** "
" "
" "
" "
" "
" "
" *** "
" * * "
" *** * * *** "
" * * * * * * "
" * * * * * * "
" * * * * * * "
" * * "
" * * * * * "
" * ** *** ** * "
" * ********* * "
" * ******* * "
" * * "
" * * "
" * *********** * "
" * * "
" * * "
" * * "
" ** ** "
" *********** "
" "
" "
" "
" "
" "
" *** "
" ***** "
" *** ***** *** "
" ***** *** ***** "
" ****** ***** ****** "
" ***** ******* ***** "
" ******************* "
" **** **** **** **** "
" **** ** ** **** "
" **** **** "
" ***** ***** "
" *************** "
" *************** "
" ** ** "
" ************* "
" ************* "
" ************* "
" ************* "
" *********** "
" "
" "
" "
" "
" *** "
" * * "
" *** *** "
" ** ** "
" ** * * ** "
" * * * * * * "
" * ** ** * "
" * * * * "
" * * * * * * "
" * * * * * * "
" * * * * * "
" * * * * * "
" * * * * "
" * * * * "
" * * "
" * ********* * "
" * * "
" * * "
" ** ** "
" *********** "
" "
" "
" "
" "
" *** "
" * * "
" *** *** "
" ** ** "
" ** * * ** "
" **** * * **** "
" ******* ******* "
" ******* ******* "
" *** ** * * ** *** "
" *** **** **** *** "
" *** ***** ***** *** "
" **** ********* **** "
" **** ******* **** "
" ***** ***** ***** "
" *************** "
" ** ** "
" ************* "
" ************* "
" ************* "
" *********** "
" "
" "
" "
" "
" "
" "
" "
" "
" *** "
" * * "
" * * "
" * * "
" * * "
" * * "
" *** "
" * * "
" * * "
" ** ** "
" * * "
" * * "
" ******* "
" * * "
" *********** "
" *********** "
" "
" "
" "
" "
" "
" "
" "
" "
" *** "
" ***** "
" ******* "
" ******* "
" ******* "
" ***** "
" *** "
" ***** "
" ***** "
" ******* "
" ***** "
" ***** "
" ******* "
" * * "
" *********** "
" *********** "
" "
" "
;
int main(void)
{
int i, j, k;
unsigned int c[8] ;
memset(c,0,sizeof(c));
j = k = 0;
printf("const char gfxTiles[PAWN][2][96] = \n{\n");
for(i=0; i<sizeof(pieces); ++i)
{
c[j] |= (pieces[i] == '*') << (26-(i%21));
if (!(i%21))
{
++j;
if(!(j%8))
{
if(!k)
printf("\t{\n");
k++;
printf("\t\t{");
int x, y;
for(x=0;x<4;x++)
{
printf("\n\t\t\t");
unsigned char v;
for(y=0;y<8;y++)
{
v = (c[y] >> (8*(3-x))) & 0xff;
printf("0x%02X, ", v);
}
}
printf("\n\t\t},\n");
if(2==k)
{
printf("\t},\n");
k = 0;
}
j = 0;
for(y=0;y<8;y++)
{
c[y] = 0;
}
}
}
}
printf("};\n");
return 0;
}

395
src/plus4/hiresPlus4.s Normal file
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; hiresPlus4.s
; cc65 Chess
;
; Created by Stefan Wessels, May 2020.
;
;-----------------------------------------------------------------------
.include "zeropage.inc"
;-----------------------------------------------------------------------
.export _plat_gfxFill, _plat_showStrXY, _plat_showPiece, _plat_colorStringXY, _plat_colorFill
.import popa
;-----------------------------------------------------------------------
.define BITMAP_ADDRESS $A000
.define LUMINANCE_ADDERSS $0800
.define COLOR_ADDERSS LUMINANCE_ADDERSS+$0400
.define CHARMAP_RAM BITMAP_ADDRESS+$2000
;-----------------------------------------------------------------------
.code
;-----------------------------------------------------------------------
; Utility - Turn tmp2 (y) and tmp3 (x) into a pointer in ptr2 that points
; in BITMAP_ADDRESS with x, y being col and row with col and row being
; 8 pixels
.proc plat_ptr2AtHgrXY
lda tmp2 ; load y
asl ; ptr2 points at start with 320 = 256 + 64 so
asl ; y in hi + 64 * y in lo/hi + COLOR_ADDERSS hi = address
asl
asl
rol ptr2 + 1
asl
rol ptr2 + 1
asl
rol ptr2 + 1
sta ptr2
lda tmp2 ; add y in hi
adc ptr2 + 1
adc #>(BITMAP_ADDRESS) ; and vic ram in hi (vic ram aligned, lo = 0)
sta ptr2 + 1 ; ptr2 now points at the correct row
stx tmp2 ; re-use tmp2, clear for possible carry
lda tmp3 ; x * 8 is offset into row where this col starts
asl
asl
asl
rol tmp2
adc ptr2
sta ptr2
lda tmp2
adc ptr2 + 1
sta ptr2 + 1 ; ptr2 now points at the start address on-screen, incl. x
rts
.endproc
;-----------------------------------------------------------------------
; Utility - Turn tmp2 (y) and ptr1 (x) into a pointer in ptr1 that points
; at COLOR_ADDERSS[x+y*40]
.proc plat_ptr2AtScrXY
lda tmp2 ; load y
asl ; * 32
asl
asl
asl
rol ptr1 + 1
asl
rol ptr1 + 1
adc ptr1 ; add x in
sta ptr1
bcc :+
inc ptr1 + 1
:
lda tmp2 ; start with y
asl ; 8 * + 32 * = 40 *
asl
asl
adc ptr1
sta ptr1
lda ptr1 + 1
adc #>(COLOR_ADDERSS) ; add screen ram hi as lo is $0 (aligned)
sta ptr1 + 1
rts
.endproc
;-----------------------------------------------------------------------
; void plat_gfxFill(char fill, char x, char y, char w, char h)
; where y & h are multiples of 8 and x and w are in columns (i.e.
; bytes not pixels). Fill the 8x8 aligned rectangle with fill.
.proc _plat_gfxFill
sta tmp1 ; h
ldx #0
stx ptr1 + 1 ; prep ptr1 hi for possible carry
stx ptr2 + 1 ; prep ptr2 hi for possible carry
jsr popa ; w
asl ; w * 8 - w in cols and 8 bytes per col till next col
asl
asl
rol ptr1 + 1 ; ptr1 now contains number of bytes to fill per row
sta ptr1
jsr popa
sta tmp2 ; y in tmp2
jsr popa
sta tmp3 ; x in tmp3
jsr plat_ptr2AtHgrXY
sec ; calculate (320 - width) as the "stride"
lda #$40
sbc ptr1
sta tmp2
lda #1
sbc ptr1 + 1
sta tmp3
jsr popa ; fill
sta tmp4
; sei ; stop interrupts
; lda 1 ; kernel out
; and #$FD
; sta 1
loop:
lda tmp4
ldy ptr1 + 1 ; check hi byte of width to fill
beq low ; width totals less than 256 bytes, no hi copy
ldy #0 ; fill 256 bytes
:
sta (ptr2), y
dey
bne :-
inc ptr2 + 1 ; adjust the write pointer by 256 bytes
low:
ldy ptr1 ; get the low bytes top copy
beq rowdone ; if none left to copy then row is done
:
dey
sta (ptr2), y ; write the block of bytes < 256
bne :-
rowdone:
dec tmp1 ; one more row done
beq done ; when wrap all rows are done
clc
lda ptr1
adc ptr2
bcc :+
inc ptr2 + 1
clc
:
adc tmp2 ; add stride to get to next row
sta ptr2
lda tmp3
adc ptr2 + 1
sta ptr2 + 1
bne loop ; bra
done:
; lda 1 ; kernel in
; ora #$02
; sta 1
; cli ; resume interrupts
rts
.endproc
;-----------------------------------------------------------------------
; void plat_colorFill(char color, char x, char y, char w, char h)
; Fills a rectangle in COLOR_ADDERSS with color.
.proc _plat_colorFill
sta tmp1 ; h
lda #0
sta ptr1 + 1 ; prep ptr2 hi for possible carry
jsr popa ; w
sta tmp3
jsr popa
sta tmp2 ; y in tmp2
jsr popa
sta ptr1 ; x in tmp3
jsr plat_ptr2AtScrXY
jsr popa ; color
sta tmp2
loop:
lda tmp2
ldy tmp3 ; get the low bytes top copy
beq rowdone ; if none left to copy then row is done
:
dey
sta (ptr1), y ; write the color
bne :-
rowdone:
dec tmp1 ; one more row done
beq done ; when wrap all rows are done
lda ptr1
adc #$28
sta ptr1
bcc loop
inc ptr1 + 1
clc
bne loop ; bra
done:
rts
.endproc
;-----------------------------------------------------------------------
; void plat_showStrXY(char x, char Y, char *str)
; Display the string pointed at by str in hires using the character set
; which must be located at CHARACTER_RAM. This must be Set 2 which
; includes lower case characters
.proc _plat_showStrXY
sta ptr1
stx ptr1 + 1
ldx #0
stx ptr2 + 1 ; init hi value for possibly shifting carry into
jsr popa
sta tmp2 ; y in tmp2
jsr popa
sta tmp3 ; x in tmp3
jsr plat_ptr2AtHgrXY
; sei ; stop interrupts
; lda 1 ; kernel out
; and #$FD
; sta 1
ldy #0
sty tmp2
loop:
ldy tmp2
lda (ptr1), y ; character
beq done
cmp #'z'
bpl :+
and #63
:
and #127
ldy #7
ldx #0
stx read + 2
asl ; *8 for bytes
rol read + 2
asl
rol read + 2
asl
rol read + 2
sta read + 1
lda #>(CHARMAP_RAM)
adc read + 2
sta read + 2
read:
lda $ffff, y
sta (ptr2), y
dey
bpl read
lda ptr2
adc #8
sta ptr2
bcc :+
inc ptr2 + 1
clc
:
inc tmp2
bne loop
done:
; lda 1 ; kernel in
; ora #$02
; sta 1
; cli ; resume interrupts
rts
.endproc
;-----------------------------------------------------------------------
; void plat_colorStringXY(char color, char x, char y, char *str)
; Uses str only for length. Writes color into COLOR_ADDERSS at
; COLOR_ADDERSS[i+x+y*40] where i iterates the string [while(str[i]) i++].
.proc _plat_colorStringXY
sta ptr2 ; store the str pointer in ptr2
stx ptr2 + 1
lda #0 ; clear ptr1 hi for carry
sta ptr1 + 1
jsr popa ; y
sta tmp2 ; save y in tmp 2
jsr popa ; x
sta ptr1 ; save x in ptr1 lo
jsr plat_ptr2AtScrXY
jsr popa ; get the color
tax ; save it in x
ldy #0 ; start at 0
:
lda (ptr2), y
beq done ; as long as string has a valid character
txa ; put color in a
sta (ptr1), y ; and write to COLOR_ADDERSS
iny
bne :-
done:
rts
.endproc
;-----------------------------------------------------------------------
; void plat_showPiece(char x, char Y, const char *src)
; copies 3 * 32 consecutive bytes from src to a rectangle in VIC RAM at x, y
; The rect is 4 bytes by 24 bytes (rows) so 96 bytes total
.proc _plat_showPiece
sta ptr1 ; store the pointer to the piece
stx ptr1 + 1
ldx #0 ; plat_ptr2AtHgrXY assumes x = 0
stx ptr2 + 1 ; init hi value for possibly shifting carry into
jsr popa
sta tmp2 ; y in tmp2
jsr popa
sta tmp3 ; x in tmp3
jsr plat_ptr2AtHgrXY ; calculate offset into ptr2
; sei ; stop interrupts
; lda 1 ; kernel out
; and #$FD
; sta 1
lda #3 ; need to do 3 loops for a whole piece
sta tmp1
loop:
ldy #31 ; 32 bytes to copy
:
lda (ptr1), y ; load src
eor (ptr2), y ; merge with dest
sta (ptr2), y ; save at dest
dey
bpl :- ; do all 32
dec tmp1 ; another 3rd done
beq done ; all done?
lda ptr1 ; more to do - move src data ptr along by 32
adc #32
sta ptr1
bcc :+
clc
inc ptr1 + 1
:
lda ptr2 ; move graphics pointer along by 320 (row down)
adc #<320
sta ptr2
lda ptr2 + 1
adc #>320
sta ptr2 + 1
bne loop ; bra
done:
; lda 1 ; kernel in
; ora #$02
; sta 1
; cli ; resume interrupts
rts
.endproc

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/*
* platPlus4.c
* cc65 Chess
*
* Created by Stefan Wessels, February 2014.
*
*/
#include <plus4.h>
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include "../types.h"
#include "../globals.h"
#include "../undo.h"
#include "../frontend.h"
#include "../plat.h"
#include "dataPlus4.h"
/*-----------------------------------------------------------------------*/
// System locations
#define BITMAP_ADDRESS (0xA000)
#define LUMINANCE_ADDERSS (0x0800)
#define COLOR_ADDERSS (LUMINANCE_ADDERSS + 0x0400)
#define CHARMAP_ROM (0xD400)
#define CHARMAP_RAM (BITMAP_ADDRESS + 0x2000)
/*-----------------------------------------------------------------------*/
#define BOARD_PIECE_WIDTH 4
#define BOARD_PIECE_HEIGHT 3
#define SCREEN_WIDTH 40
#define SCREEN_HEIGHT 25
#define COLOR_OFFSET 0
#define SCROLL_SPEED 0x00f0
/*-----------------------------------------------------------------------*/
// Internal function Prototype
char plat_TimeExpired(unsigned int aTime, char *timerInit);
/*-----------------------------------------------------------------------*/
// Function Prototype for functions in hires.s
void plat_gfxFill(char fill, char x, char y, char w, char h);
void plat_colorFill(char color, char x, char y, char w, char h);
void plat_showStrXY(char x, char y, char *str);
void plat_colorStringXY(char color, char x, char y, char *str);
void plat_showPiece(char x, char Y, const char *src);
/*-----------------------------------------------------------------------*/
// Local storage
static char t_bcol, t_bgco, t_colo, t_vscr, t_hscr, t_misc, t_vide;
char textStr[41];
static char subMenu;
/*-----------------------------------------------------------------------*/
// Called one-time to set up the platform (or computer or whatever)
void plat_Init()
{
// Clearly something I don't understand here. If I make the loop counter an
// int, or even another char I define, this all stops working.
char a, b, c;
for(gReturnToOS = 0; gReturnToOS < 255; gReturnToOS++) {
TED.enable_rom = 1;
a = *((char*)(CHARMAP_ROM+gReturnToOS));
b = *((char*)(CHARMAP_ROM+256+gReturnToOS));
c = *((char*)(CHARMAP_ROM+512+gReturnToOS));
TED.enable_ram = 0;
*((char*)(CHARMAP_RAM+gReturnToOS)) = a;
*((char*)(CHARMAP_RAM+256+gReturnToOS)) = b;
*((char*)(CHARMAP_RAM+512+gReturnToOS)) = c;
}
// Setting this to 0 will not show the "Quit" option in the main menu
gReturnToOS = 1;
if(gReturnToOS)
{
// Save these values so they can be restored
t_bcol = TED.bordercolor;
t_bgco = TED.bgcolor;
t_colo = TED.color1;
t_vscr = TED.vscroll;
t_hscr = TED.hscroll;
t_misc = TED.misc;
t_vide = TED.video_addr;
}
// Move the cursor to the lower right since cursor(0) doesn't seem to work.
gotoxy(39,24);
// This doesn't appear to work
cursor(0);
TED.bordercolor = COLOR_GREEN;
TED.bgcolor = BCOLOR_GREEN | CATTR_LUMA4;
TED.color1 = BCOLOR_BLACK;
TED.vscroll &= ~0b00010000;
// Set the location of the bitmap
TED.misc = (TED.misc & 0b11000001) | (BITMAP_ADDRESS >> 0x0A);
// Set the location of the luminance and color
TED.video_addr = (TED.video_addr & 0b00000111) | (LUMINANCE_ADDERSS >> 0x08);
// Clear all pixels on the screen
plat_gfxFill(0,0,0,40,25);
// set the base screen color on green
// memset(SCREEN_RAM, COLOR_WHITE<<4|COLOR_GREEN, 0x400);
memset((char*)LUMINANCE_ADDERSS, CATTR_LUMA3 | CATTR_LUMA7>>4, 0x400);
memset((char*)COLOR_ADDERSS, BCOLOR_WHITE<<4 | BCOLOR_GREEN, 0x400);
// Show the welcome text
strcpy(textStr, "Commodore 64 graphics version, 2020.");
plat_showStrXY(2,SCREEN_HEIGHT/2-1, gszAbout);
plat_showStrXY(2,SCREEN_HEIGHT/2+1,textStr);
plat_colorStringXY(COLOR_BLACK<<4|COLOR_GREEN,2,SCREEN_HEIGHT/2+1,textStr);
// Set the color for the black king
plat_colorFill(COLOR_BLACK<<4|COLOR_GREEN ,SCREEN_WIDTH/2 - 1, SCREEN_HEIGHT/2 - 6, 4, 3);
// Show the welcome kings (black and white, solid versions)
plat_showPiece(SCREEN_WIDTH/2 - 1, SCREEN_HEIGHT/2 - 6, gfxTiles[KING-1][1]);
plat_showPiece(SCREEN_WIDTH/2 - 1, SCREEN_HEIGHT/2 + 4, gfxTiles[KING-1][1]);
// hack to make the menu not flash (no when dimming into sub-menus)
subMenu = 0;
// Un-blank the screen
TED.vscroll |= 0b00110000;
plat_ReadKeys(1);
}
/*-----------------------------------------------------------------------*/
// This is not needed on the C64
void plat_UpdateScreen()
{
}
/*-----------------------------------------------------------------------*/
// Very simple menu with a heading and a scrolling banner as a footer
char plat_Menu(char **menuItems, char height, char *scroller)
{
static char *prevScroller, *pScroller, *pEnd;
int keyMask;
char i, sx, sy, numMenuItems, timerInit = 0, maxLen = 0;
// Darken the chessboard so the menu "pops"
if(!subMenu++)
plat_colorFill(COLOR_GRAY1<<4,1,1,32,24);
// If the scroller message chages, cache the new one
if(prevScroller != scroller)
{
prevScroller = scroller;
pScroller = scroller;
pEnd = scroller + strlen(scroller);
}
// Find the longest entry
for(numMenuItems=0; menuItems[numMenuItems]; ++numMenuItems)
{
char len = strlen(menuItems[numMenuItems]);
if(len > maxLen)
maxLen = len;
}
// Centre on the screen
sy = MAX_SIZE(0, (SCREEN_HEIGHT / 2) - (height / 2) - 1);
sx = MAX_SIZE(0, (SCREEN_WIDTH / 2) - (maxLen / 2) - 1);
maxLen = MIN_SIZE(SCREEN_WIDTH-2, maxLen);
// Draw and color a frame
plat_gfxFill(0xAA , sx-1 , sy-1 , maxLen+4 , 1 );
plat_gfxFill(0xAA , sx-1 , sy , 1 , height+3 );
plat_gfxFill(0xAA , sx+maxLen+2, sy , 1 , height+3 );
plat_gfxFill(0xAA , sx , sy+height+2, maxLen+2 , 1 );
plat_colorFill(COLOR_YELLOW<<4, sx-1 , sy-1 , maxLen+4 , 1 );
plat_colorFill(COLOR_YELLOW<<4, sx-1 , sy , 1 , height+3 );
plat_colorFill(COLOR_YELLOW<<4, sx+maxLen+2, sy , 1 , height+3 );
plat_colorFill(COLOR_YELLOW<<4, sx , sy+height+2, maxLen+2 , 1 );
// Show the title
sprintf(textStr, " %.*s ",38, menuItems[0]);
plat_showStrXY(sx, sy, textStr);
plat_colorStringXY(COLOR_YELLOW<<4|COLOR_BLUE, sx, sy, textStr);
// Leave a blank line
sprintf(textStr, "%-*s", maxLen+2," ");
plat_showStrXY(sx, ++sy, textStr);
plat_colorStringXY(COLOR_BLUE, sx, sy, textStr);
// Show all the menu items
for(i=1; i<numMenuItems; ++i)
{
sprintf(textStr, " %.*s ",maxLen, menuItems[i]);
plat_showStrXY(sx, sy+i, textStr);
plat_colorStringXY(COLOR_GRAY2<<4|COLOR_BLUE, sx, sy+i, textStr);
}
// Pad with blank lines to menu height
for(;i<height;++i)
{
sprintf(textStr, "%-*s", maxLen+2," ");
plat_showStrXY(sx, sy+i, textStr);
plat_colorStringXY(COLOR_BLUE, sx, sy+i, textStr);
}
// Color the scroller area once
plat_colorStringXY(COLOR_CYAN<<4|COLOR_BLUE, sx, sy+height, textStr);
// Select the first item
i = 1;
do
{
// Highlight the selected item
sprintf(textStr, ">%.*s<",maxLen, menuItems[i]);
plat_showStrXY(sx, sy+i, textStr);
plat_colorStringXY(COLOR_WHITE<<4|COLOR_BLUE, sx, sy+i, textStr);
// Look for user input
keyMask = plat_ReadKeys(0);
if(keyMask & INPUT_MOTION)
{
// selection changes so de-highlight the selected item
sprintf(textStr, " %.*s ",maxLen, menuItems[i]);
plat_showStrXY(sx, sy+i, textStr);
plat_colorStringXY(COLOR_GRAY2<<4|COLOR_BLUE, sx, sy+i, textStr);
// see if the selection goes up or down
switch(keyMask & INPUT_MOTION)
{
case INPUT_UP:
if(!--i)
i = numMenuItems-1;
break;
case INPUT_DOWN:
if(numMenuItems == ++i)
i = 1;
break;
}
}
keyMask &= (INPUT_SELECT | INPUT_BACKUP);
// Show the scroller
sprintf(textStr, " %.*s ",maxLen, pScroller);
plat_showStrXY(sx, sy+height, textStr);
// Wrap the message if needed
if((pEnd - pScroller) < maxLen-1)
{
sprintf(textStr, " %.*s ",maxLen-(pEnd - pScroller)-1, scroller);
plat_showStrXY(sx+(pEnd-pScroller)+1, sy+height, textStr);
}
// Only update the scrolling when needed
if(plat_TimeExpired(SCROLL_SPEED, &timerInit))
{
++pScroller;
if(!*pScroller)
pScroller = scroller;
}
} while(keyMask != INPUT_SELECT && keyMask != INPUT_BACKUP);
// if backing out of the menu, return 0
if(keyMask & INPUT_BACKUP)
return 0;
// return the selection
return i;
}
/*-----------------------------------------------------------------------*/
// Draw the chess board and possibly clear the log section
void plat_DrawBoard(char clearLog)
{
char i;
// Not in a menu when drawBoard is called
subMenu = 0;
if(clearLog)
{
// Clear the log area pixels and color to green
plat_gfxFill(0,33,0,7,25);
plat_colorFill(COLOR_GREEN,33,0,7,25);
}
// set the left and top margin row/col to clear & green
plat_colorFill(COLOR_GREEN,0,0,33,1);
plat_colorFill(COLOR_GREEN,0,0,1,25);
// redraw all tiles
for(i=0; i<64; ++i)
{
plat_DrawSquare(i);
}
// Add the A..H and 1..8 tile-keys
for(i=0; i<8; ++i)
{
// Print the letters and numbers in Black on Green
sprintf(textStr, "%c",'A'+i);
plat_showStrXY(2+i*BOARD_PIECE_WIDTH, 0, textStr);
plat_colorStringXY(COLOR_BLACK<<4|COLOR_GREEN,2+i*BOARD_PIECE_WIDTH, 0, textStr);
sprintf(textStr, "%d",8-i);
plat_showStrXY(0, 2+i*BOARD_PIECE_HEIGHT, textStr);
plat_colorStringXY(COLOR_BLACK<<4|COLOR_GREEN,0, 2+i*BOARD_PIECE_HEIGHT, textStr);
}
}
/*-----------------------------------------------------------------------*/
// Draw a tile with background and piece on it for positions 0..63
void plat_DrawSquare(char position)
{
char index;
char piece, color;
char y = position / 8, x = position & 7;
char blackWhite = !((x & 1) ^ (y & 1));
// Draw the boatrd square
plat_gfxFill(blackWhite ? 0xff : 0x0, 1 + x * BOARD_PIECE_WIDTH, 1 + y * BOARD_PIECE_HEIGHT, BOARD_PIECE_WIDTH, BOARD_PIECE_HEIGHT);
plat_colorFill(COLOR_WHITE<<4 , 1 + x * BOARD_PIECE_WIDTH, 1 + y * BOARD_PIECE_HEIGHT, BOARD_PIECE_WIDTH, BOARD_PIECE_HEIGHT);
// Get the piece data to draw the piece over the tile
piece = gChessBoard[y][x];
color = piece & PIECE_WHITE;
piece &= PIECE_DATA;
if(piece)
{
index = 1;
if((color && blackWhite) || (!color && !blackWhite))
index = 0;
plat_showPiece(1 + x * BOARD_PIECE_WIDTH, y * BOARD_PIECE_HEIGHT + 1, gfxTiles[piece-1][index]);
}
// Show the attack numbers
if(gShowAttackBoard)
{
char piece_value = (gChessBoard[y][x] & 0x0f);
char piece_color = (gChessBoard[y][x] & PIECE_WHITE) >> 7;
// Attackers (bottom left)
sprintf(textStr, "%d",(gpAttackBoard[giAttackBoardOffset[position][0]]));
plat_showStrXY(1+x*BOARD_PIECE_WIDTH,(y+1)*BOARD_PIECE_HEIGHT, textStr);
plat_colorStringXY((piece_color ? COLOR_RED : COLOR_GREEN)<<4,1+x*BOARD_PIECE_WIDTH,(y+1)*BOARD_PIECE_HEIGHT, textStr);
// Defenders (bottom right)
sprintf(textStr, "%d",(gpAttackBoard[giAttackBoardOffset[position][1]]));
plat_showStrXY(1+x*BOARD_PIECE_WIDTH+3,(y+1)*BOARD_PIECE_HEIGHT, textStr);
plat_colorStringXY((!piece_color ? COLOR_RED : COLOR_GREEN)<<4,1+x*BOARD_PIECE_WIDTH+3,(y+1)*BOARD_PIECE_HEIGHT, textStr);
// Color (0 is black, 128 is white) and piece value (1=ROOK, 2=KNIGHT, 3=BISHOP, 4=QUEEN, 5=KING, 6=PAWN)
sprintf(textStr, "%0d",piece_value);
plat_showStrXY(1+x*BOARD_PIECE_WIDTH,1+y*BOARD_PIECE_HEIGHT, textStr);
plat_colorStringXY(COLOR_PURPLE<<4,1+x*BOARD_PIECE_WIDTH,1+y*BOARD_PIECE_HEIGHT, textStr);
// Color
sprintf(textStr, "%d",piece_color);
plat_showStrXY(1+x*BOARD_PIECE_WIDTH+3,1+y*BOARD_PIECE_HEIGHT, textStr);
plat_colorStringXY((piece_color ? COLOR_WHITE : COLOR_GRAY1)<<4,1+x*BOARD_PIECE_WIDTH+3,1+y*BOARD_PIECE_HEIGHT, textStr);
}
}
/*-----------------------------------------------------------------------*/
void plat_ShowSideToGoLabel(char side)
{
// Show Black or White
sprintf(textStr, "%s",gszSideLabel[side]);
plat_showStrXY(2+8*BOARD_PIECE_WIDTH, 0, textStr);
plat_colorStringXY((side ? COLOR_WHITE : COLOR_BLACK)<<4|COLOR_GREEN, 2+8*BOARD_PIECE_WIDTH, 0, textStr);
}
/*-----------------------------------------------------------------------*/
void plat_Highlight(char position, char color, char)
{
char y = position / 8, x = position & 7;
char white = !((x & 1) ^ (y & 1));
// White pieces need the foreground color set, black the background color
if(white)
color <<= 4;
// turn position into a board based offset
x *= BOARD_PIECE_WIDTH;
y *= BOARD_PIECE_HEIGHT;
// The board is 1 line down from the top
y++;
// Draw the two vertical bars - the "cursor"
plat_colorFill(color, x + 1 , y, 1, BOARD_PIECE_HEIGHT);
plat_colorFill(color, x + BOARD_PIECE_WIDTH, y, 1, BOARD_PIECE_HEIGHT);
}
/*-----------------------------------------------------------------------*/
void plat_ShowMessage(char *str, char)
{
// Always an error message - illegal move or no more undo/redo
sprintf(textStr, "%.*s",SCREEN_WIDTH-1-(8*BOARD_PIECE_WIDTH),str);
plat_showStrXY(1+(8*BOARD_PIECE_WIDTH), SCREEN_HEIGHT-1, textStr);
plat_colorStringXY(COLOR_RED<<4|COLOR_GREEN, 1+(8*BOARD_PIECE_WIDTH), SCREEN_HEIGHT-1, textStr);
}
/*-----------------------------------------------------------------------*/
void plat_ClearMessage()
{
// Erase the message from ShowMessage
sprintf(textStr, "%-*s",SCREEN_WIDTH-1-8*BOARD_PIECE_WIDTH," ");
plat_showStrXY((8*BOARD_PIECE_WIDTH)+1, (8*BOARD_PIECE_HEIGHT), textStr);
}
/*-----------------------------------------------------------------------*/
void plat_AddToLogWin()
{
char bot = (8*BOARD_PIECE_HEIGHT)-2, y = 1, x = 2+(8*BOARD_PIECE_WIDTH);
char i = 0;
// Show a log of the moves that have been played
for(; y<=bot; ++y)
{
if(undo_FindUndoLine(bot-y))
{
frontend_FormatLogString();
sprintf(textStr, "%-6s",gLogStrBuffer);
plat_showStrXY(x, y, textStr);
plat_colorStringXY((gColor[0] ? COLOR_WHITE : COLOR_BLACK)<<4|COLOR_GREEN, x, y, textStr);
}
else
{
sprintf(textStr, "%-*s",SCREEN_WIDTH-x," ");
plat_showStrXY(x, y, textStr);
}
}
}
/*-----------------------------------------------------------------------*/
// Important note about this function is that it alters the gTile...
// global data trackers so beware when calling it
void plat_AddToLogWinTop()
{
// This redraws the whole log window so just call it
plat_AddToLogWin();
}
/*-----------------------------------------------------------------------*/
// Use timer 1 to time a duration
char plat_TimeExpired(unsigned int aTime, char *timerInit)
{
static unsigned int h = 0xffff;
unsigned int t = *(int*)&TED.t1_lo;
if(!*timerInit || t < aTime || t > h)
{
*timerInit = 1;
TED.t1_lo = 0xFF;
TED.t1_hi = 0xFF;
h = 0xffff;
return 1;
}
else
{
h = t;
}
return 0;
}
/*-----------------------------------------------------------------------*/
int plat_ReadKeys(char blocking)
{
char key = 0;
int keyMask = 0;
if(blocking || kbhit())
key = cgetc();
else
return 0;
switch(key)
{
case 145: // Up
keyMask |= INPUT_UP;
break;
case 29: // Right
keyMask |= INPUT_RIGHT;
break;
case 17: // Down
keyMask |= INPUT_DOWN;
break;
case 157: // Left
keyMask |= INPUT_LEFT;
break;
case 3: // Esc
keyMask |= INPUT_BACKUP;
break;
case 65: // 'a' - Show Attackers
keyMask |= INPUT_TOGGLE_A;
break;
case 66: // 'b' - Board attacks - Show all attacks
keyMask |= INPUT_TOGGLE_B;
break;
case 68: // 'd' - Show Defenders
keyMask |= INPUT_TOGGLE_D;
break;
case 77: // 'm' - Menu
keyMask |= INPUT_MENU;
break;
case 13: // Enter
keyMask |= INPUT_SELECT;
break;
case 82:
keyMask |= INPUT_REDO;
break;
case 85:
keyMask |= INPUT_UNDO;
break;
// default: // Debug - show key code
// {
// char s[] = "Key:000";
// s[4] = (key/100)+'0';
// key -= (s[4] - '0') * 100;
// s[5] = (key/10)+'0';
// s[6] = (key%10)+'0';
// plat_ShowMessage(s,COLOR_RED);
// }
break;
}
return keyMask;
}
/*-----------------------------------------------------------------------*/
// Only gets called if gReturnToOS is true, which it isn't
void plat_Shutdown()
{
// restore Plus4 specific hardware values
TED.bordercolor = t_bcol;
TED.bgcolor = t_bgco;
TED.color1 = t_colo;
TED.vscroll = t_vscr;
TED.hscroll = t_hscr;
TED.misc = t_misc;
TED.video_addr = t_vide;
clrscr();
// Bank in the ROM
TED.enable_rom = 1;
cursor(1);
}