mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-25 18:33:11 +00:00
136 lines
3.4 KiB
C
136 lines
3.4 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(0x08) hw_concm; // consumer/commercial mode
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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(0x0b) hw_colbx; // palette transfer
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__sfr __at(0x0c) hw_magic; // magic register
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__sfr __at(0x0d) hw_infbk; // interrupt feedback
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__sfr __at(0x0e) hw_inmod; // interrupt enable, mode
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__sfr __at(0x0f) hw_inlin; // interrupt line
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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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__sfr __at(0x14) hw_keypad0; // keypad column
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__sfr __at(0x15) hw_keypad1; // keypad column
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__sfr __at(0x16) hw_keypad2; // keypad column
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__sfr __at(0x17) hw_keypad3; // keypad column
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__sfr __at(0x1c) hw_p1pot; // player 1 paddle
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__sfr __at(0x1d) hw_p2pot; // player 1 paddle
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__sfr __at(0x1e) hw_p3pot; // player 1 paddle
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__sfr __at(0x1f) hw_p4pot; // player 1 paddle
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__sfr __at(0x10) hw_tonmo; // tone master oscillator
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__sfr __at(0x11) hw_tonea;
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__sfr __at(0x12) hw_toneb;
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__sfr __at(0x13) hw_tonec;
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__sfr __at(0x14) hw_vibra;
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__sfr __at(0x15) hw_volc;
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__sfr __at(0x16) hw_volab;
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__sfr __at(0x17) hw_voln;
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__sfr __at(0x18) hw_sndbx;
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// magic register 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_ROTATE 0x04
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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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// xpand register
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#define XPAND_COLORS(off,on) (((off)&3) | (((on)&3)<<2))
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// collision detection
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#define RESET_COLLISION() (hw_intst)
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#define WAS_COLLISION() ((hw_intst & 0xf0)!=0)
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// controller flags
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#define JOY_UP 0x1
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#define JOY_DOWN 0x2
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#define JOY_LEFT 0x4
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#define JOY_RIGHT 0x8
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#define JOY_TRIGGER 0x10
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// constants
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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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byte __at(0xfff) WASTER; // to soak up shifter residue
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/// GRAPHICS FUNCTIONS
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void set_palette(byte palette[8]) __z88dk_fastcall; // palette in reverse order
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#define SET_PALETTE(palette)\
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__asm__("ld hl,#"#palette);\
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__asm__("ld bc,#0x80b");\
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__asm__("otir");\
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#define SET_RIGHT_PALETTE(palette)\
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__asm__("ld hl,#"#palette);\
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__asm__("ld bc,#0x40b");\
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__asm__("otir");\
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/// SOUND FUNCTIONS
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void set_sound_registers(byte regs[8]) __z88dk_fastcall; // in reverse too
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/// INTERRUPTS
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typedef void (*t_interrupt_handler)(void) __interrupt;
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void set_interrupt_vector(t_interrupt_handler*ih) __z88dk_fastcall;
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#define CHANGE_INTERRUPT_VECTOR(ihp)\
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__asm__("ld hl,#"#ihp);\
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__asm__("ld a,l");\
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__asm__("out (0x0D),a");\
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__asm__("ld a,h");\
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__asm__("ld i,a");\
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#endif
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