118 lines
2.7 KiB
C
118 lines
2.7 KiB
C
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#ifndef _WILLIAMS_H
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#define _WILLIAMS_H
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typedef unsigned char byte;
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typedef unsigned char bool;
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typedef signed char sbyte;
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typedef unsigned short word;
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enum { false=0, true=1 };
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byte* palette = 0xc000;
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byte* nvram = 0xcc00;
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#define input0 (*(byte*)0xc804)
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#define input1 (*(byte*)0xc806)
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#define input2 (*(byte*)0xc80c)
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#define sound_pia (*(byte*)0xc80c)
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#define rom_select *((byte*)0xc900)
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#define video_counter *((byte*)0xcb00)
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#define watchdog0x39 *((byte*)0xcbff)
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#define WATCHDOG (watchdog0x39 = 0x39)
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// switch flags
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#define UP1 (input0 & 0x1)
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#define DOWN1 (input0 & 0x2)
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#define LEFT1 (input0 & 0x4)
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#define RIGHT1 (input0 & 0x8)
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#define START1 (input0 & 0x10)
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#define START2 (input0 & 0x20)
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#define UP2 (input0 & 0x40)
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#define DOWN2 (input0 & 0x80)
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#define LEFT2 (input1 & 0x1)
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#define RIGHT2 (input1 & 0x2)
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#define AUTOUP (input2 & 0x1)
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#define ADVANCE (input2 & 0x2)
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#define COIN2 (input2 & 0x4)
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#define HIGHSCORERESET (input2 & 0x8)
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#define COIN1 (input2 & 0x10)
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#define COIN3 (input2 & 0x20)
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#define TILTSWITCH (input2 & 0x40)
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#define SOUNDACK (input2 & 0x80)
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// blitter flags
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#define SRCSCREEN 0x1
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#define DSTSCREEN 0x2
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#define ESYNC 0x4
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#define FGONLY 0x8
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#define SOLID 0x10
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#define RSHIFT 0x20
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#define EVENONLY 0x40
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#define ODDONLY 0x80
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struct {
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byte flags;
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byte solid;
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word sstart;
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word dstart;
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byte width;
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byte height;
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} *_blitter = 0xca00;
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#define blitter (*_blitter)
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struct {
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byte mem[152][256];
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} *_vid = 0x0;
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#define vidmem (_vid->mem)
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#define BLIT_OP(_x,_y,_w,_h,_src,_color,_flags) do {\
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blitter.width = (_w)^4; \
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blitter.height = (_h)^4; \
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blitter.sstart = (word)(_src); \
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blitter.dstart = ((word)(_x)<<8)+(_y); \
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blitter.solid = (_color); \
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blitter.flags = (_flags); \
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} while (0)
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#define BLIT_SOLID(x, y, w, h, color) \
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BLIT_OP(x, y, w, h, 0, color, DSTSCREEN|SOLID)
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// x1: 0-151
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// y1: 0-255
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void blit_solid(byte x1, byte y1, byte w, byte h, byte color);
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void blit_copy(byte x1, byte y1, byte w, byte h, const byte* data);
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void blit_copy_solid(byte x1, byte y1, byte w, byte h, const byte* data, byte solid);
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void blit_sprite(const byte* data, byte x, byte y);
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void blit_sprite_solid(const byte* data, byte x, byte y, byte color);
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void unblit_sprite_rect(const byte* data, byte x, byte y);
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void blit_sprite_strided(const byte* data, byte x, byte y, byte stride);
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void unblit_sprite_strided(const byte* data, byte x, byte y, byte stride);
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// x1: 0-303
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// y1: 0-255
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void draw_pixel(word xx, byte y, byte color);
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void draw_solid(word x, byte y, byte w, byte h, byte color);
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void draw_vline(word x, byte y, byte h, byte color);
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void draw_copy_solid(word x, byte y, byte w, byte h, const byte* data, byte solid);
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// BCD
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asm word bcd_add(word a, word b);
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#endif
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