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8bitworkshop/presets/mw8080bw/skeleton.sdcc
2017-04-19 14:26:46 -04:00

178 lines
6.0 KiB
Plaintext

#include <string.h>
typedef unsigned char byte;
typedef signed char sbyte;
typedef unsigned short word;
volatile __sfr __at (0x0) input0;
volatile __sfr __at (0x1) input1;
volatile __sfr __at (0x2) input2;
__sfr __at (0x2) bitshift_offset;
volatile __sfr __at (0x3) bitshift_read;
__sfr __at (0x4) bitshift_value;
__sfr __at (0x6) watchdog_strobe;
byte __at (0x2400) vidmem[224][32]; // 256x224x1 video memory
#define FIRE1 (input1 & 0x10)
#define LEFT1 (input1 & 0x20)
#define RIGHT1 (input1 & 0x40)
#define COIN1 (input1 & 0x1)
#define START1 (input1 & 0x4)
#define START2 (input1 & 0x2)
void scanline96() __interrupt;
void scanline224() __interrupt;
void main();
// start routine @ 0x0
// set stack pointer, enable interrupts
void start() {
__asm
LD SP,#0x2400
EI
NOP
__endasm;
main();
}
// scanline 96 interrupt @ 0x8
// we don't have enough bytes to make this an interrupt
// because the next routine is at 0x10
void _RST_8() {
__asm
NOP
NOP
NOP
NOP
NOP
__endasm;
scanline96();
}
// scanline 224 interrupt @ 0x10
// this one, we make an interrupt so it saves regs.
void scanline224() __interrupt {
vidmem[2]++;
}
// scanline 96 function, saves regs
void scanline96() __interrupt {
vidmem[0]++;
}
/// GRAPHICS FUNCTIONS
void clrscr() {
memset(vidmem, 0, sizeof(vidmem));
}
inline void xor_pixel(byte x, byte y) {
byte* dest = &vidmem[x][y>>3];
*dest ^= 0x1 << (y&7);
}
void draw_vline(byte x, byte y1, byte y2) {
byte yb1 = y1/8;
byte yb2 = y2/8;
byte* dest = &vidmem[x][yb1];
signed char nbytes = yb2 - yb1;
*dest++ ^= 0xff << (y1&7);
if (nbytes > 0) {
while (--nbytes > 0) {
*dest++ ^= 0xff;
}
*dest ^= 0xff >> (~y2&7);
} else {
*--dest ^= 0xff << ((y2+1)&7);
}
}
#define LOCHAR 0x20
#define HICHAR 0x5e
const byte font8x8[HICHAR-LOCHAR+1][8] = {
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0x79,0x79,0x00,0x00,0x00 }, { 0x00,0x70,0x70,0x00,0x00,0x70,0x70,0x00 }, { 0x14,0x7f,0x7f,0x14,0x14,0x7f,0x7f,0x14 }, { 0x00,0x12,0x3a,0x6b,0x6b,0x2e,0x24,0x00 }, { 0x00,0x63,0x66,0x0c,0x18,0x33,0x63,0x00 }, { 0x00,0x26,0x7f,0x59,0x59,0x77,0x27,0x05 }, { 0x00,0x00,0x00,0x10,0x30,0x60,0x40,0x00 }, { 0x00,0x00,0x1c,0x3e,0x63,0x41,0x00,0x00 }, { 0x00,0x00,0x41,0x63,0x3e,0x1c,0x00,0x00 }, { 0x08,0x2a,0x3e,0x1c,0x1c,0x3e,0x2a,0x08 }, { 0x00,0x08,0x08,0x3e,0x3e,0x08,0x08,0x00 }, { 0x00,0x00,0x00,0x03,0x03,0x00,0x00,0x00 }, { 0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x00 }, { 0x00,0x00,0x00,0x03,0x03,0x00,0x00,0x00 }, { 0x00,0x01,0x03,0x06,0x0c,0x18,0x30,0x20 }, { 0x00,0x3e,0x7f,0x49,0x51,0x7f,0x3e,0x00 }, { 0x00,0x01,0x11,0x7f,0x7f,0x01,0x01,0x00 }, { 0x00,0x23,0x67,0x45,0x49,0x79,0x31,0x00 }, { 0x00,0x22,0x63,0x49,0x49,0x7f,0x36,0x00 }, { 0x00,0x0c,0x0c,0x14,0x34,0x7f,0x7f,0x04 }, { 0x00,0x72,0x73,0x51,0x51,0x5f,0x4e,0x00 }, { 0x00,0x3e,0x7f,0x49,0x49,0x6f,0x26,0x00 }, { 0x00,0x60,0x60,0x4f,0x5f,0x70,0x60,0x00 }, { 0x00,0x36,0x7f,0x49,0x49,0x7f,0x36,0x00 }, { 0x00,0x32,0x7b,0x49,0x49,0x7f,0x3e,0x00 }, { 0x00,0x00,0x00,0x12,0x12,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0x13,0x13,0x00,0x00,0x00 }, { 0x00,0x08,0x1c,0x36,0x63,0x41,0x41,0x00 }, { 0x00,0x14,0x14,0x14,0x14,0x14,0x14,0x00 }, { 0x00,0x41,0x41,0x63,0x36,0x1c,0x08,0x00 }, { 0x00,0x20,0x60,0x45,0x4d,0x78,0x30,0x00 }, { 0x00,0x3e,0x7f,0x41,0x59,0x79,0x3a,0x00 }, { 0x00,0x1f,0x3f,0x68,0x68,0x3f,0x1f,0x00 }, { 0x00,0x7f,0x7f,0x49,0x49,0x7f,0x36,0x00 }, { 0x00,0x3e,0x7f,0x41,0x41,0x63,0x22,0x00 }, { 0x00,0x7f,0x7f,0x41,0x63,0x3e,0x1c,0x00 }, { 0x00,0x7f,0x7f,0x49,0x49,0x41,0x41,0x00 }, { 0x00,0x7f,0x7f,0x48,0x48,0x40,0x40,0x00 }, { 0x00,0x3e,0x7f,0x41,0x49,0x6f,0x2e,0x00 }, { 0x00,0x7f,0x7f,0x08,0x08,0x7f,0x7f,0x00 }, { 0x00,0x00,0x41,0x7f,0x7f,0x41,0x00,0x00 }, { 0x00,0x02,0x03,0x41,0x7f,0x7e,0x40,0x00 }, { 0x00,0x7f,0x7f,0x1c,0x36,0x63,0x41,0x00 }, { 0x00,0x7f,0x7f,0x01,0x01,0x01,0x01,0x00 }, { 0x00,0x7f,0x7f,0x30,0x18,0x30,0x7f,0x7f }, { 0x00,0x7f,0x7f,0x38,0x1c,0x7f,0x7f,0x00 }, { 0x00,0x3e,0x7f,0x41,0x41,0x7f,0x3e,0x00 }, { 0x00,0x7f,0x7f,0x48,0x48,0x78,0x30,0x00 }, { 0x00,0x3c,0x7e,0x42,0x43,0x7f,0x3d,0x00 }, { 0x00,0x7f,0x7f,0x4c,0x4e,0x7b,0x31,0x00 }, { 0x00,0x32,0x7b,0x49,0x49,0x6f,0x26,0x00 }, { 0x00,0x40,0x40,0x7f,0x7f,0x40,0x40,0x00 }, { 0x00,0x7e,0x7f,0x01,0x01,0x7f,0x7e,0x00 }, { 0x00,0x7c,0x7e,0x03,0x03,0x7e,0x7c,0x00 }, { 0x00,0x7f,0x7f,0x06,0x0c,0x06,0x7f,0x7f }, { 0x00,0x63,0x77,0x1c,0x1c,0x77,0x63,0x00 }, { 0x00,0x70,0x78,0x0f,0x0f,0x78,0x70,0x00 }, { 0x00,0x43,0x47,0x4d,0x59,0x71,0x61,0x00 }, { 0x00,0x00,0x7f,0x7f,0x41,0x41,0x00,0x00 }, { 0x00,0x20,0x30,0x18,0x0c,0x06,0x03,0x01 }, { 0x00,0x00,0x41,0x41,0x7f,0x7f,0x00,0x00 }, { 0x00,0x08,0x18,0x3f,0x3f,0x18,0x08,0x00 }
};
void draw_sprite(const byte* src, byte x, byte y) {
byte i,j;
byte* dest = &vidmem[x][y];
byte w = *src++;
byte h = *src++;
for (j=0; j<h; j++) {
for (i=0; i<w; i++) {
*dest++ = *src++;
}
dest += 32-w;
}
}
byte xor_sprite(const byte* src, byte x, byte y) {
byte i,j;
byte result = 0;
byte* dest = &vidmem[x][y];
byte w = *src++;
byte h = *src++;
for (j=0; j<h; j++) {
for (i=0; i<w; i++) {
result |= (*dest++ ^= *src++);
}
dest += 32-w;
}
return result;
}
void erase_sprite(const byte* src, byte x, byte y) {
byte i,j;
byte* dest = &vidmem[x][y];
byte w = *src++;
byte h = *src++;
for (j=0; j<h; j++) {
for (i=0; i<w; i++) {
*dest++ &= ~(*src++);
}
dest += 32-w;
}
}
void clear_sprite(const byte* src, byte x, byte y) {
byte i,j;
byte* dest = &vidmem[x][y];
byte w = *src++;
byte h = *src++;
for (j=0; j<h; j++) {
for (i=0; i<w; i++) {
*dest++ = 0;
}
dest += 32-w;
}
}
void draw_char(char ch, byte x, byte y) {
byte i;
const byte* src = &font8x8[(ch-LOCHAR)][0];
byte* dest = &vidmem[x*8][y];
for (i=0; i<8; i++) {
*dest = *src;
dest += 32;
src += 1;
}
}
void draw_string(const char* str, byte x, byte y) {
do {
byte ch = *str++;
if (!ch) break;
draw_char(ch, x, y);
x++;
} while (1);
}
void main() {
clrscr();
draw_string("HELLO WORLD", 1, 1);
while(1) ;
}