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https://github.com/sehugg/8bitworkshop.git
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81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
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#ifndef _ACLIB_H
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#define _ACLIB_H
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// convenient type definitions
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typedef unsigned char byte;
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typedef signed char sbyte;
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typedef unsigned short word;
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typedef enum { false, true } bool;
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/// registers
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__sfr __at(0x00) hw_col0r; // palette 0
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__sfr __at(0x01) hw_col1r;
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__sfr __at(0x02) hw_col2r;
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__sfr __at(0x03) hw_col3r;
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__sfr __at(0x04) hw_col0l;
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__sfr __at(0x05) hw_col1l;
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__sfr __at(0x06) hw_col2l;
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__sfr __at(0x07) hw_col3l; // palette 7
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__sfr __at(0x09) hw_horcb; // horiz color boundary
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__sfr __at(0x0a) hw_verbl; // vertical blanking line * 2
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__sfr __at(0x0c) hw_magic; // magic register
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__sfr __at(0x19) hw_xpand; // expander register
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__sfr __at(0x08) hw_intst; // intercept test feedback
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__sfr __at(0x10) hw_p1ctrl; // player 1 controls
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__sfr __at(0x11) hw_p2ctrl; // player 2 controls
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__sfr __at(0x12) hw_p3ctrl; // player 3 controls
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__sfr __at(0x13) hw_p4ctrl; // player 4 controls
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// flags
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#define M_SHIFT0 0x00
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#define M_SHIFT1 0x01
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#define M_SHIFT2 0x02
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#define M_SHIFT3 0x03
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#define M_XPAND 0x08
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#define M_MOVE 0x00
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#define M_OR 0x10
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#define M_XOR 0x20
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#define M_FLOP 0x40
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#define M_SHIFT(x) ((x)&3)
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#define XPAND_COLORS(off,on) (((off)&3) | (((on)&3)<<2))
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#define M_ERASE 0x04 // special case for draw_sprite()
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#define VTOTAL 102 // number of total scanlines
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#define VHEIGHT 89 // number of scanlines in use
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#define VBWIDTH 40 // number of bytes per scanline
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#define PIXWIDTH 160 // 4 pixels per byte
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// magic register active area
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byte __at (0x0000) vmagic[VTOTAL][VBWIDTH];
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// regular frame buffer RAM
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byte __at (0x4000) vidmem[VTOTAL][VBWIDTH];
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// font constants
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#define LOCHAR 32
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#define HICHAR 127
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#define FONT_BWIDTH 1
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#define FONT_HEIGHT 8
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/// GRAPHICS FUNCTIONS
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void clrscr();
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void set_palette(byte palette[8]); // palette in reverse order
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void vline(byte x, byte y1, byte y2, byte col, byte op);
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void pixel(byte x, byte y, byte col, byte op);
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void render_sprite(const byte* src, byte x, byte y, byte op);
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void draw_char(byte ch, byte x, byte y, byte op);
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void draw_string(const char* str, byte x, byte y);
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void draw_bcd_word(word bcd, byte x, byte y, byte op);
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word bcd_add(word a, word b);
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#define erase_sprite(src,x,y) render_sprite(src,x,y,M_ERASE);
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#endif
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