mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-27 02:31:00 +00:00
1453 lines
20 KiB
C
1453 lines
20 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <SDL.h>
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#include "gr-sim.h"
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#include "tfv_zp.h"
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#include "apple2_font.h"
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/* 40x48 low-res mode */
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#define GR_XSIZE 40
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#define GR_YSIZE 48
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#define PIXEL_X_SCALE 14
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#define PIXEL_Y_SCALE 8
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/* 40 column only for now */
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#define TEXT_XSIZE 40
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#define TEXT_YSIZE 24
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#define TEXT_X_SCALE 14
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#define TEXT_Y_SCALE 16
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static int xsize=GR_XSIZE*PIXEL_X_SCALE;
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static int ysize=GR_YSIZE*PIXEL_Y_SCALE;
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static int debug=0;
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/* 128kB of RAM */
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#define RAMSIZE 128*1024
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unsigned char ram[RAMSIZE];
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/* Registers */
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unsigned char a,y,x;
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/* Zero page addresses */
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#define WNDLFT 0x20
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#define WNDWDTH 0x21
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#define WNDTOP 0x22
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#define WNDBTM 0x23
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#define CH 0x24
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#define CV 0x25
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#define GBASL 0x26
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#define GBASH 0x27
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#define BASL 0x28
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#define BASH 0x29
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#define BAS2L 0x2A
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#define BAS2H 0x2B
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#define H2 0x2C
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#define V2 0x2D
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#define MASK 0x2E
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#define COLOR 0x30
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#define INVFLG 0x32
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#define YSAV 0x34
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#define YSAV1 0x35
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#define CSWL 0x36
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#define CSWH 0x37
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#define FIRST 0xF0
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#define SPEEDZ 0xF1
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#define FLASH 0xF3
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#define TEMP 0xFA
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static int text_mode=0xff;
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static int text_page_1=0x00;
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static int hires_on=0x00;
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static int mixed_graphics=0xff;
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void soft_switch(unsigned short address) {
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switch(address) {
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case TXTCLR: // $c050
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text_mode=0x00;
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break;
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case TXTSET: // $c051
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text_mode=0xff;
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break;
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case MIXCLR: // $c052
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mixed_graphics=0x00;
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break;
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case MIXSET: // $c053
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mixed_graphics=0xff;
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break;
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case LOWSCR: // $c054
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text_page_1=0x00;
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break;
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case HISCR: // $c055
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text_page_1=0xff;
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break;
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case LORES: // $c056
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hires_on=0x00;
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break;
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case HIRES: // $c057
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hires_on=0xff;
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break;
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default:
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fprintf(stderr,"Unknown soft switch %x\n",address);
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break;
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}
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}
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int soft_switch_read(unsigned short address) {
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switch(address) {
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case TEXT_RD: // $c01a
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return text_mode;
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case MIXED_RD: // $c01b
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return mixed_graphics;
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case PAGE2_RD: // $c01c
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return text_page_1;
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case HIRES_RD: // $c01d
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return hires_on;
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default:
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fprintf(stderr,"Unknown soft switch read %x\n",address);
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break;
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}
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return 0;
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}
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static SDL_Surface *sdl_screen=NULL;
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int grsim_input(void) {
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SDL_Event event;
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int keypressed;
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while ( SDL_PollEvent(&event)) {
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switch(event.type) {
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case SDL_KEYDOWN:
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keypressed=event.key.keysym.sym;
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switch (keypressed) {
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case SDLK_ESCAPE:
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return 27;
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case 'a'...'z':
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case 'A'...'Z':
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return keypressed;
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case SDLK_UP:
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return 11;
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case SDLK_DOWN:
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return 10;
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case SDLK_RIGHT:
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return 21;
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case SDLK_LEFT:
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return 8;
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default:
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printf("Unknown %d\n",keypressed);
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return keypressed;
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}
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break;
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case SDL_JOYBUTTONDOWN:
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case SDL_JOYAXISMOTION:
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printf("Joystick!\n");
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break;
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default:
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printf("Unknown input action!\n");
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break;
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}
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}
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return 0;
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}
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static unsigned int color[16]={
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0, /* 0 black */
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0xe31e60, /* 1 magenta */
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0x604ebd, /* 2 dark blue */
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0xff44fd, /* 3 purple */
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0x00a360, /* 4 dark green */
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0x9c9c9c, /* 5 grey 1 */
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0x14cffd, /* 6 medium blue */
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0xd0c3ff, /* 7 light blue */
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0x607203, /* 8 brown */
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0xff6a3c, /* 9 orange */
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0x9d9d9d, /* 10 grey 2 */
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0xffa0d0, /* 11 pink */
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0x14f53c, /* 12 bright green */
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0xd0dd8d, /* 13 yellow */
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0x72ffd0, /* 14 aqua */
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0xffffff, /* 15 white */
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};
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/* a = ycoord */
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static int gbascalc(unsigned char a) {
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unsigned char s,c;
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/* input ABCD EFGH */
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s=a; /* store a on stack */
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c=a&1;
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a=a>>1; /* lsr */
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a=a&0x3; /* mask */
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a=a|0x4; /* 00001FG */
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ram[GBASH]=a;
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a=s;
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a=a&0x18; /* 000D E000 */
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/* if odd */
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if (c) {
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a=a+0x7f+1;
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}
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ram[GBASL]=a;
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a=a<<2;
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a=a|ram[GBASL];
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ram[GBASL]=a;
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if (debug) printf("GBAS=%02X%02X\n",ram[GBASH],ram[GBASL]);
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return 0;
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}
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static short y_indirect(unsigned char base, unsigned char y) {
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unsigned short addr;
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addr=(((short)(ram[base+1]))<<8) | (short)ram[base];
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if (debug) printf("Address=%x\n",addr+y);
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return addr+y;
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}
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int scrn(unsigned char xcoord, unsigned char ycoord) {
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unsigned char a,y,c;
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a=ycoord;
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y=xcoord;
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c=a&1;
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a=a>>1;
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gbascalc(a);
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a=ram[y_indirect(GBASL,y)];
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if (c) {
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return a>>4;
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}
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else {
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return a&0xf;
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}
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return 0;
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}
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static short gr_addr_lookup[24]={
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0x400,0x480,0x500,0x580,0x600,0x680,0x700,0x780,
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0x428,0x4a8,0x528,0x5a8,0x628,0x6a8,0x728,0x7a8,
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0x450,0x4d0,0x550,0x5d0,0x650,0x6d0,0x750,0x7d0,
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};
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int grsim_update(void) {
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int x,y,i,j;
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int bit_set,ch,inverse,flash;
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unsigned int *t_pointer;
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int text_start,text_end,gr_start,gr_end;
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int gr_addr,gr_addr_hi;
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int temp_col;
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/* point to SDL output pixels */
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t_pointer=((Uint32 *)sdl_screen->pixels);
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text_start=0; text_end=0;
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gr_start=0;gr_end=GR_YSIZE;
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/* get the proper modes */
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if (text_mode) {
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text_start=0; text_end=TEXT_YSIZE;
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gr_start=0; gr_end=0;
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}
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else if (mixed_graphics) {
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text_start=20; text_end=TEXT_YSIZE;
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gr_start=0; gr_end=40;
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}
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/* do the top 40/48 if in graphics mode */
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for(y=gr_start;y<gr_end;y++) {
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for(j=0;j<PIXEL_Y_SCALE;j++) {
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gr_addr=gr_addr_lookup[y/2];
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gr_addr_hi=y%2;
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/* adjust for page */
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if (text_page_1) {
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gr_addr+=0x400;
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}
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for(x=0;x<GR_XSIZE;x++) {
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if (gr_addr_hi) {
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temp_col=(ram[gr_addr]&0xf0)>>4;
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}
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else {
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temp_col=ram[gr_addr]&0x0f;
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}
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for(i=0;i<PIXEL_X_SCALE;i++) {
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*t_pointer=color[temp_col];
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t_pointer++;
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}
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gr_addr++;
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}
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}
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}
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/* Do the remaining text */
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for(y=text_start;y<text_end;y++) {
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for(j=0;j<TEXT_Y_SCALE;j++) {
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for(x=0;x<TEXT_XSIZE;x++) {
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gr_addr=gr_addr_lookup[y];
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/* adjust for page */
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if (text_page_1) {
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gr_addr+=0x400;
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}
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ch=ram[gr_addr+x];
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if (ch&0x80) {
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flash=0;
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inverse=0;
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ch=ch&0x7f;
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}
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else if (ch&0x40) {
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flash=1;
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inverse=0;
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ch=ch&0x3f;
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}
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else {
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inverse=1;
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flash=0;
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ch=ch&0x3f;
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}
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for(i=0;i<TEXT_X_SCALE;i++) {
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/* 14 x 16 */
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/* but font is 5x7 */
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if (j>13) bit_set=0;
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else if (i>11) bit_set=0;
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else bit_set=(a2_font[ch][j/2])&(1<<(5-(i/2)));
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if (inverse) {
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if (bit_set) *t_pointer=color[0];
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else *t_pointer=color[15];
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}
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else if (flash) {
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if (bit_set) *t_pointer=color[9];
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else *t_pointer=color[0];
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}
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else {
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if (bit_set) *t_pointer=color[15];
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else *t_pointer=color[0];
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}
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t_pointer++;
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}
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}
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}
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}
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SDL_UpdateRect(sdl_screen, 0, 0, xsize, ysize);
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return 0;
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}
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void setnorm(void) {
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y=0xff;
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ram[INVFLG]=y;
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}
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int grsim_init(void) {
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int mode;
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int x;
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mode=SDL_SWSURFACE|SDL_HWPALETTE|SDL_HWSURFACE;
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if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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fprintf(stderr,
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"Couldn't initialize SDL: %s\n", SDL_GetError());
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return -1;
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}
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/* Clean up on exit */
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atexit(SDL_Quit);
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/* assume 32-bit color */
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sdl_screen = SDL_SetVideoMode(xsize, ysize, 32, mode);
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if ( sdl_screen == NULL ) {
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fprintf(stderr, "ERROR! Couldn't set %dx%d video mode: %s\n",
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xsize,ysize,SDL_GetError());
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return -1;
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}
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SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
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/* Init screen */
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for(x=0x400;x<0x800;x++) ram[x]=0;
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/* Set up some zero page values */
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ram[WNDLFT]=0x00;
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ram[WNDWDTH]=0x28;
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ram[WNDTOP]=0x00;
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ram[WNDBTM]=0x18;
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a=0; y=0; x=0;
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//FA62 RESET
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setnorm();
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return 0;
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}
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int color_equals(int new_color) {
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/* Top and Bottom both have color */
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ram[COLOR]=((new_color%16)<<4)|(new_color%16);
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return 0;
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}
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static void monitor_plot(void) {
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unsigned char c;
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/* Call into Monitor $F800 */
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c=a&1; /* save LSB in carry */
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a=a>>1; /* lsr A */
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gbascalc(a);
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if (c) {
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/* If odd, mask is 0xf0 */
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ram[MASK]=0xf0;
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}
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else {
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/* If even, mask is 0x0f */
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ram[MASK]=0x0f;
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}
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a=ram[y_indirect(GBASL,y)];
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a=a^ram[COLOR];
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a=a&ram[MASK];
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a=a^ram[y_indirect(GBASL,y)];
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ram[y_indirect(GBASL,y)]=a;
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}
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int basic_plot(unsigned char xcoord, unsigned char ycoord) {
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if (ycoord>40) {
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printf("Y too big %d\n",ycoord);
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return -1;
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}
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/* Applesoft Source Code */
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/* F225 GET X,Y Values */
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/* Y-coord in A */
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/* X-coord in Y */
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/* Check that X-coord<40 */
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a=ycoord;
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y=xcoord;
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if (y>=40) {
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printf("X too big %d\n",y);
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return -1;
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}
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monitor_plot();
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return 0;
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}
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int basic_hlin(int x1, int x2, int at) {
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int i;
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for(i=x1;i<=x2;i++) basic_plot(i,at);
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return 0;
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}
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static void bascalc(void) {
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// FBC1
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unsigned char s,c;
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s=a;
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c=a&0x1;
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a=a>>1;
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a=a&0x3;
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a=a|0x4;
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ram[BASH]=a;
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a=s;
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a=a&0x18;
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if (c!=0) {
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a=a+0x80;
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}
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// BSCLC2
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ram[BASL]=a;
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a=a<<2;
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a=a|ram[BASL];
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ram[BASL]=a;
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}
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static void vtabz(void) {
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bascalc();
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a+=ram[WNDLFT];
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ram[BASL]=a;
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}
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static void rom_vtab(void) {
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/* fb5b */
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a=ram[CV];
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vtabz();
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}
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static void setwnd(void) {
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ram[WNDTOP]=a;
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a=0x0;
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ram[WNDLFT]=a;
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a=0x28;
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ram[WNDWDTH]=a;
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a=0x18;
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ram[WNDBTM]=a;
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a=0x17;
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// TABV
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ram[CV]=a;
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rom_vtab();
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}
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static void vline(void) {
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unsigned char s;
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// f828
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vline_loop:
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s=a;
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monitor_plot();
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a=s;
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if (a<ram[V2]) {
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a++;
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goto vline_loop;
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}
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}
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static void clrtop(void) {
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// f836
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y=0x27;
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ram[V2]=y;
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y=0x27;
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clrsc3:
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a=0x0;
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ram[COLOR]=a;
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vline();
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y--;
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if (y<=0x80) goto clrsc3;
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}
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static void setgr(void) {
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// FB40
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// SETGR
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soft_switch(TXTCLR); // LDA TXTCLR
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soft_switch(MIXSET); // LDA MIXSET
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clrtop();
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a=0x14;
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|
setwnd();
|
|
|
|
}
|
|
|
|
int gr(void) {
|
|
|
|
// F390
|
|
soft_switch(LORES); // LDA SW.LORES
|
|
soft_switch(MIXSET); // LDA SW.MIXSET
|
|
//JMP MON.SETGR
|
|
|
|
setgr();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int bload(char *filename, int address) {
|
|
|
|
FILE *fff;
|
|
int count=0,ch=0;
|
|
|
|
fff=fopen(filename,"r");
|
|
if (fff==NULL) {
|
|
fprintf(stderr,"Could not open %s\n",filename);
|
|
return -1;
|
|
}
|
|
|
|
while(1) {
|
|
|
|
if ((address+count)>RAMSIZE) {
|
|
fprintf(stderr,"ERROR ram too high\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
ch=fgetc(fff);
|
|
if (ch<0) break;
|
|
|
|
ram[address+count]=ch;
|
|
count++;
|
|
}
|
|
fclose(fff);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int cleolz(void) {
|
|
// FC9E
|
|
|
|
a=0xa0;
|
|
clreol2:
|
|
ram[y_indirect(BASL,y)]=a;
|
|
y++;
|
|
|
|
if (y<ram[WNDWDTH]) goto clreol2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cleop1(void) {
|
|
|
|
unsigned char s;
|
|
|
|
cleop1_begin:
|
|
s=a;
|
|
vtabz();
|
|
cleolz();
|
|
y=0x00;
|
|
a=s;
|
|
a++;
|
|
if (a<=ram[WNDBTM]) goto cleop1_begin;
|
|
rom_vtab();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int home(void) {
|
|
|
|
/* FC58 */
|
|
a=ram[WNDTOP];
|
|
ram[CV]=a;
|
|
y=0x00;
|
|
ram[CH]=y;
|
|
cleop1();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int grsim_unrle(unsigned char *rle_data, int address) {
|
|
|
|
// int xoffset=0;
|
|
// int yoffset=0;
|
|
|
|
unsigned char s;
|
|
// int out_pointer;
|
|
|
|
ram[GBASL]=0; // input address
|
|
ram[GBASH]=0;
|
|
|
|
x=0;
|
|
y=0;
|
|
|
|
ram[BASL]=address&0xff;
|
|
ram[BASH]=(address>>8)&0xff;
|
|
|
|
ram[CV]=0;
|
|
|
|
/* CH = xsize */
|
|
ram[CH]=rle_data[y_indirect(GBASL,y)];
|
|
y++;
|
|
|
|
/* Skip ysize */
|
|
y++;
|
|
|
|
while(1) {
|
|
/* Get run length into a */
|
|
a=rle_data[y_indirect(GBASL,y)];
|
|
|
|
/* 0xff is a special value meaning end */
|
|
if (a==0xff) break;
|
|
ram[TEMP]=a;
|
|
|
|
y++;
|
|
if (y==0) ram[GBASH]++;
|
|
|
|
a=rle_data[y_indirect(GBASL,y)];
|
|
y++;
|
|
if (y==0) ram[GBASH]++;
|
|
|
|
s=y;
|
|
y=0;
|
|
|
|
while(1) {
|
|
ram[y_indirect(BASL,y)]=a;
|
|
ram[BASL]++;
|
|
if (ram[BASL]==0) ram[BASH]++;
|
|
x++;
|
|
if (x>=ram[CH]) {
|
|
if (ram[BASL]>0xa7) ram[BASH]++;
|
|
ram[BASL]+=0x58;
|
|
ram[CV]+=2;
|
|
if (ram[CV]>14) {
|
|
ram[CV]=0;
|
|
if (ram[BASL]<0xd8) {
|
|
ram[BASL]=ram[BASL]-0xd8;
|
|
ram[BASH]=ram[BASH]-0x4;
|
|
}
|
|
else {
|
|
ram[BASL]=ram[BASL]-0xd8;
|
|
ram[BASH]=ram[BASH]-0x3;
|
|
}
|
|
}
|
|
x=0;
|
|
}
|
|
ram[TEMP]--;
|
|
if (ram[TEMP]==0) break;
|
|
}
|
|
y=s;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int basic_vlin(int y1, int y2, int at) {
|
|
|
|
// f244
|
|
|
|
// LINCOOR
|
|
// GET "A,B AT C"
|
|
// PUT SMALLER OF (A,B) IN FIRST,
|
|
// AND LARGER OF (A,B) IN H2 AND V2.
|
|
// RETURN WITH (X) = C-VALUE.
|
|
|
|
if (y1>y2) { ram[H2]=y1; ram[V2]=y1; ram[FIRST]=y2; }
|
|
else { ram[H2]=y2; ram[V2]=y2; ram[FIRST]=y1; }
|
|
x=at;
|
|
|
|
if (x>40) {
|
|
fprintf(stderr,"Error! AT too large %d!\n",x);
|
|
}
|
|
|
|
//VLIN JSR LINCOOR
|
|
//F244- 8A 2050 TXA X-COORD IN Y-REG
|
|
//F245- A8 2060 TAY
|
|
//F246- C0 28 2070 CPY #40 X-COORD MUST BE < 40
|
|
//F248- B0 BC 2080 BCS GOERR TOO LARGE
|
|
//F24A- A5 F0 2090 LDA FIRST TOP END OF LINE IN A-REG
|
|
//F24C- 4C 28 F8 2100 JMP MON.VLINE LET MONITOR DRAW LINE
|
|
|
|
y=x;
|
|
if (y>=40) {
|
|
fprintf(stderr,"X value to big in vline %d\n",y);
|
|
return -1;
|
|
}
|
|
a=ram[FIRST];
|
|
|
|
vline();
|
|
|
|
// for(i=y1;i<y2;i++) basic_plot(at,i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
int grsim_put_sprite_page(int page, unsigned char *sprite_data, int xpos, int ypos) {
|
|
|
|
unsigned char i;
|
|
unsigned char *ptr;
|
|
short address;
|
|
|
|
ptr=sprite_data;
|
|
x=*ptr;
|
|
ptr++;
|
|
ram[CV]=*ptr;
|
|
ptr++;
|
|
|
|
ypos=ypos&0xfe;
|
|
|
|
while(1) {
|
|
address=gr_addr_lookup[ypos/2];
|
|
address+=(page)<<8;
|
|
address+=xpos;
|
|
for(i=0;i<x;i++) {
|
|
a=*ptr;
|
|
if (a==0) {
|
|
}
|
|
else if ((a&0xf0)==0) {
|
|
ram[address]&=0xf0;
|
|
ram[address]|=a;
|
|
}
|
|
else if ((a&0x0f)==0) {
|
|
ram[address]&=0x0f;
|
|
ram[address]|=a;
|
|
}
|
|
else {
|
|
ram[address]=a;
|
|
}
|
|
ptr++;
|
|
address++;
|
|
}
|
|
ypos+=2;
|
|
ram[CV]--;
|
|
if (ram[CV]==0) break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int grsim_put_sprite(unsigned char *sprite_data, int xpos, int ypos) {
|
|
|
|
grsim_put_sprite_page(ram[DRAW_PAGE],sprite_data,xpos,ypos);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int gr_copy(short source, short dest) {
|
|
|
|
short dest_addr,source_addr;
|
|
int i,j,l;
|
|
|
|
for(i=0;i<8;i++) {
|
|
source_addr=gr_addr_lookup[i]+(source-0x400);
|
|
dest_addr=gr_addr_lookup[i]+(dest-0x400);
|
|
|
|
if (i<4) l=120;
|
|
else l=80;
|
|
|
|
for(j=0;j<l;j++) {
|
|
ram[dest_addr+j]=ram[source_addr+j];
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gr_copy_to_current(short source) {
|
|
|
|
short dest_addr,source_addr;
|
|
int i,j,l;
|
|
|
|
for(i=0;i<8;i++) {
|
|
source_addr=gr_addr_lookup[i]+(source-0x400);
|
|
dest_addr=gr_addr_lookup[i]+(ram[DRAW_PAGE]<<8);
|
|
|
|
if (i<4) l=120;
|
|
else l=80;
|
|
|
|
for(j=0;j<l;j++) {
|
|
ram[dest_addr+j]=ram[source_addr+j];
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gr_copy48(short source, short dest) {
|
|
|
|
short dest_addr,source_addr;
|
|
int i,j;
|
|
|
|
for(i=0;i<8;i++) {
|
|
source_addr=gr_addr_lookup[i]+0x400;
|
|
dest_addr=gr_addr_lookup[i];
|
|
|
|
for(j=0;j<120;j++) {
|
|
ram[dest_addr+j]=ram[source_addr+j];
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int text(void) {
|
|
// FB36
|
|
|
|
soft_switch(LOWSCR); // LDA LOWSCR ($c054)
|
|
soft_switch(TXTSET); // LDA TXTSET ($c051);
|
|
a=0;
|
|
|
|
setwnd();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void scroll(void) {
|
|
unsigned char s;
|
|
|
|
// fc70
|
|
|
|
a=ram[WNDTOP];
|
|
s=a;
|
|
vtabz();
|
|
|
|
// SCRL1
|
|
scrl1:
|
|
a=ram[BASL];
|
|
ram[BAS2L]=a;
|
|
a=ram[BASH];
|
|
ram[BAS2H]=a;
|
|
y=ram[WNDWDTH];
|
|
y--;
|
|
a=s;
|
|
a+=1;
|
|
if (a>=ram[WNDBTM]) {
|
|
// SCRL3
|
|
y=0;
|
|
cleolz();
|
|
rom_vtab();
|
|
return;
|
|
}
|
|
s=a;
|
|
vtabz();
|
|
// SCRL2
|
|
scrl2:
|
|
a=ram[y_indirect(BASL,y)];
|
|
ram[y_indirect(BAS2L,y)]=a;
|
|
y--;
|
|
if (y<0x80) goto scrl2;
|
|
goto scrl1;
|
|
}
|
|
|
|
static void lf(void) {
|
|
ram[CV]=ram[CV]+1;
|
|
a=ram[CV];
|
|
if (a<ram[WNDBTM]) {
|
|
vtabz();
|
|
return;
|
|
}
|
|
ram[CV]=ram[CV]-1;
|
|
scroll();
|
|
}
|
|
|
|
static void cr(void) {
|
|
a=0x00;
|
|
ram[CH]=a;
|
|
lf();
|
|
}
|
|
|
|
|
|
|
|
static void bell1(void) {
|
|
}
|
|
|
|
static void up(void) {
|
|
|
|
a=ram[WNDTOP];
|
|
if (a>ram[CV]) return;
|
|
|
|
ram[CV]=ram[CV]-1;
|
|
rom_vtab();
|
|
}
|
|
|
|
static void bs(void) {
|
|
|
|
ram[CH]=ram[CH]-1;
|
|
|
|
/* still positive */
|
|
if (ram[CH]<0x80) return;
|
|
|
|
a=ram[WNDWDTH];
|
|
ram[CH]=a;
|
|
ram[CH]=ram[CH]-1;
|
|
|
|
up();
|
|
}
|
|
|
|
static void storadv(void) {
|
|
|
|
// fbf0
|
|
|
|
y=ram[CH];
|
|
ram[y_indirect(BASL,y)]=a;
|
|
|
|
// advance
|
|
|
|
ram[CH]=ram[CH]+1;
|
|
a=ram[CH];
|
|
if (a>=ram[WNDWDTH]) {
|
|
cr();
|
|
}
|
|
|
|
}
|
|
|
|
static void vidout(void) {
|
|
// fbfd
|
|
|
|
if (a>=0xa0) {
|
|
storadv();
|
|
return;
|
|
}
|
|
|
|
/* Control Characters */
|
|
y=a;
|
|
// if bit 7 is set then we set negative flag
|
|
// BPL storadv
|
|
if (a<0x80) {
|
|
storadv();
|
|
return;
|
|
}
|
|
|
|
/* carriage return */
|
|
if (a==0x8d) {
|
|
cr();
|
|
return;
|
|
}
|
|
|
|
/* linefeed */
|
|
if (a==0x8a) {
|
|
lf();
|
|
return;
|
|
}
|
|
|
|
/* backspace */
|
|
if (a==0x88) {
|
|
bs();
|
|
return;
|
|
}
|
|
|
|
/* any other control code, beep */
|
|
bell1();
|
|
return;
|
|
|
|
}
|
|
|
|
static void vidwait(void) {
|
|
// check if control-S being pressed
|
|
|
|
vidout();
|
|
}
|
|
|
|
static void cout1(void) {
|
|
|
|
unsigned char s;
|
|
|
|
if (a<0xa0) {
|
|
}
|
|
else {
|
|
a=a&ram[INVFLG];
|
|
}
|
|
// coutz
|
|
ram[YSAV1]=y;
|
|
s=a;
|
|
|
|
vidwait();
|
|
|
|
a=s;
|
|
y=ram[YSAV1];
|
|
|
|
}
|
|
|
|
static void cout(void) {
|
|
// FDED
|
|
// jmp (cswl) custom handler
|
|
cout1();
|
|
}
|
|
|
|
static void wait(void) {
|
|
}
|
|
|
|
static void outdo(void) {
|
|
|
|
unsigned char s;
|
|
|
|
/* Print char in the accumulator */
|
|
a=a|0x80; /* raw ascii has high bit on Apple II */
|
|
if (a<0xa0) {
|
|
/* skip if control char? */
|
|
}
|
|
else {
|
|
a=a|ram[FLASH];
|
|
}
|
|
cout();
|
|
a=a&0x7f; // ?
|
|
s=a; // pha
|
|
a=ram[SPEEDZ];
|
|
wait(); // this is BASIC, slow down if speed set
|
|
a=s;
|
|
}
|
|
|
|
static void crdo(void) {
|
|
// DAFB
|
|
a=13; // carriage return
|
|
outdo();
|
|
a=a^0xff; /* negate for some reason? */
|
|
}
|
|
|
|
void basic_htab(int xpos) {
|
|
|
|
unsigned char s;
|
|
|
|
// F7E7
|
|
|
|
|
|
x=xpos; // JSR GETBYT
|
|
x--; // DEX
|
|
a=x; // TXA
|
|
while(a>=40) {
|
|
s=a; // PHA
|
|
crdo();
|
|
a=s; // PLA
|
|
a-=40;
|
|
}
|
|
ram[CH]=a; // STA MON.CH
|
|
|
|
// KRW for the win!
|
|
|
|
}
|
|
|
|
static void tabv(void) {
|
|
|
|
// TABV
|
|
// fb5b
|
|
ram[CV]=a;
|
|
rom_vtab();
|
|
}
|
|
|
|
void basic_vtab(int ypos) {
|
|
// f256
|
|
x=ypos;
|
|
x--; /* base on zero */
|
|
a=x;
|
|
|
|
if (a>23) {
|
|
fprintf(stderr,"Error, vtab %d too big\n",ypos);
|
|
return;
|
|
}
|
|
tabv();
|
|
}
|
|
|
|
void basic_print(char *string) {
|
|
|
|
int i;
|
|
|
|
for(i=0;i<strlen(string);i++) {
|
|
a=string[i];
|
|
outdo();
|
|
}
|
|
|
|
}
|
|
|
|
void basic_inverse(void) {
|
|
// F277
|
|
a=0x3f;
|
|
x=0;
|
|
ram[INVFLG]=a;
|
|
ram[FLASH]=x;
|
|
|
|
return;
|
|
}
|
|
|
|
void basic_normal(void) {
|
|
// F273
|
|
a=0xff;
|
|
x=0;
|
|
ram[INVFLG]=a;
|
|
ram[FLASH]=x;
|
|
|
|
return;
|
|
}
|
|
|
|
static unsigned short hlin_addr;
|
|
static unsigned short hlin_hi;
|
|
|
|
|
|
int hlin_continue(int width) {
|
|
|
|
int i;
|
|
|
|
for(i=0;i<width;i++) {
|
|
if (hlin_hi) {
|
|
ram[hlin_addr]=ram[hlin_addr]&0x0f;
|
|
ram[hlin_addr]|=ram[COLOR]&0xf0;
|
|
}
|
|
else {
|
|
ram[hlin_addr]=ram[hlin_addr]&0xf0;
|
|
ram[hlin_addr]|=ram[COLOR]&0x0f;
|
|
}
|
|
hlin_addr++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int plot(unsigned char xcoord, unsigned char ycoord) {
|
|
|
|
unsigned char c;
|
|
|
|
hlin_addr=gr_addr_lookup[ycoord/2];
|
|
hlin_addr+=(ram[DRAW_PAGE])<<8;
|
|
hlin_addr+=xcoord;
|
|
|
|
hlin_hi=ycoord&1;
|
|
|
|
if (hlin_hi) {
|
|
/* If odd, mask is 0xf0 */
|
|
ram[MASK]=0xf0;
|
|
}
|
|
else {
|
|
/* If even, mask is 0x0f */
|
|
ram[MASK]=0x0f;
|
|
}
|
|
|
|
c=ram[COLOR]&ram[MASK];
|
|
ram[hlin_addr]&=~ram[MASK];
|
|
ram[hlin_addr]|=c;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
int hlin(int page, int x1, int x2, int at) {
|
|
|
|
hlin_addr=gr_addr_lookup[at/2];
|
|
hlin_hi=at&1;
|
|
|
|
hlin_addr+=(page)<<8;
|
|
|
|
hlin_addr+=x1;
|
|
hlin_continue(x2-x1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned short vlin_hi;
|
|
|
|
/* TODO: optimize */
|
|
/* Could make twice as fast if draw neighboring two in one write */
|
|
/* instead of two */
|
|
|
|
int vlin(int y1, int y2, int at) {
|
|
|
|
x=y1;
|
|
ram[V2]=y2;
|
|
y=at;
|
|
|
|
vlin_loop:
|
|
// for(a=y1;a<y2;a++) {
|
|
|
|
ram[TEMPY]=y;
|
|
a=x;
|
|
y=a/2;
|
|
|
|
ram[OUTL]=gr_addr_lookup[y]&0xff;
|
|
ram[OUTH]=(gr_addr_lookup[y]>>8)&0xff;
|
|
|
|
ram[OUTH]+=ram[DRAW_PAGE];
|
|
|
|
vlin_hi=x&1;
|
|
|
|
y=ram[TEMPY]; // y=at;
|
|
|
|
if (vlin_hi) {
|
|
ram[y_indirect(OUTL,y)]=ram[y_indirect(OUTL,y)]&0x0f;
|
|
ram[y_indirect(OUTL,y)]|=ram[COLOR]&0xf0;
|
|
}
|
|
else {
|
|
ram[y_indirect(OUTL,y)]=ram[y_indirect(OUTL,y)]&0xf0;
|
|
ram[y_indirect(OUTL,y)]|=ram[COLOR]&0x0f;
|
|
}
|
|
x++;
|
|
if (x<ram[V2]) goto vlin_loop;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int hlin_double_continue(int width) {
|
|
|
|
y=width;
|
|
hlin_loop:
|
|
// for(y=width;y>0;y--) {
|
|
ram[y_indirect(GBASL,y)]=ram[COLOR];
|
|
y--;
|
|
if (y!=255) goto hlin_loop;
|
|
|
|
// }
|
|
|
|
return 0;
|
|
}
|
|
|
|
int hlin_double(int page, int x1, int x2, int at) {
|
|
// page, y, V2, A
|
|
a=at;
|
|
y=at/2;
|
|
|
|
ram[GBASL]=(gr_addr_lookup[y])&0xff;
|
|
ram[GBASH]=(gr_addr_lookup[y]>>8);
|
|
|
|
ram[GBASH]+=(page);
|
|
|
|
ram[GBASL]+=x1;
|
|
hlin_double_continue(x2-x1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int collision(int xx, int yy, int ground_color) {
|
|
|
|
int page=0;
|
|
int beach_color;
|
|
int collide=1;
|
|
|
|
hlin_addr=gr_addr_lookup[yy/2];
|
|
|
|
hlin_addr+=(page)<<8;
|
|
|
|
hlin_addr+=xx;
|
|
|
|
beach_color=COLOR_YELLOW|(COLOR_YELLOW<<4);
|
|
|
|
if ((ram[hlin_addr]==ground_color) &&
|
|
(ram[hlin_addr+1]==ground_color) &&
|
|
(ram[hlin_addr+2]==ground_color)) {
|
|
|
|
printf("NOCOLLIDE %x!\n",ground_color);
|
|
collide=0;
|
|
}
|
|
|
|
if ((ram[hlin_addr]==beach_color) &&
|
|
(ram[hlin_addr+1]==beach_color) &&
|
|
(ram[hlin_addr+2]==beach_color)) {
|
|
|
|
printf("NOCOLLIDE %x!\n",beach_color);
|
|
collide=0;
|
|
}
|
|
|
|
printf("COLLIDE %x %x %x not %x %x\n",
|
|
ram[hlin_addr],ram[hlin_addr+1],ram[hlin_addr+2],
|
|
ground_color,beach_color);
|
|
|
|
return collide;
|
|
}
|
|
|
|
void clear_top(int page) {
|
|
int i;
|
|
|
|
ram[COLOR]=0x0;
|
|
for(i=0;i<40;i+=2) {
|
|
hlin_double(page,0,40,i);
|
|
}
|
|
}
|
|
|
|
void clear_bottom(int page) {
|
|
int i;
|
|
|
|
/* NORMAL space */
|
|
ram[COLOR]=0xa0;
|
|
for(i=40;i<48;i+=2) {
|
|
hlin_double(page,0,40,i);
|
|
}
|
|
}
|
|
|
|
|
|
void vtab(int ypos) {
|
|
ram[CV]=ypos-1;
|
|
}
|
|
|
|
void htab(int xpos) {
|
|
ram[CH]=xpos-1;
|
|
}
|
|
|
|
void move_cursor(void) {
|
|
|
|
int address;
|
|
|
|
address=gr_addr_lookup[ram[CV]];
|
|
address+=ram[CH];
|
|
|
|
address+=(ram[DRAW_PAGE]<<8);
|
|
|
|
ram[BASL]=address&0xff;
|
|
ram[BASH]=address>>8;
|
|
|
|
}
|
|
|
|
|
|
void print(char *string) {
|
|
|
|
for(y=0;y<strlen(string);y++) {
|
|
a=string[y];
|
|
a=a|0x80;
|
|
ram[y_indirect(BASL,y)]=a;
|
|
}
|
|
ram[BASL]+=strlen(string);
|
|
}
|
|
|
|
void print_inverse(char *string) {
|
|
|
|
for(y=0;y<strlen(string);y++) {
|
|
a=string[y];
|
|
a=a&0x3f;
|
|
ram[y_indirect(BASL,y)]=a;
|
|
}
|
|
ram[BASL]+=strlen(string);
|
|
}
|