143 lines
5.1 KiB
C
143 lines
5.1 KiB
C
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// define basic types for convenience
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typedef unsigned char byte; // 8-bit unsigned
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typedef signed char sbyte; // 8-bit signed
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typedef unsigned short word; // 16-bit signed
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typedef enum { false, true } bool; // boolean
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/// MEMORY MAPS
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typedef struct t_TIA {
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byte _00;
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byte VBLANK; // input port control
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byte _02_07[6];
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byte INPT0; // PADDLE CONTROL INPUT 0 WO
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byte INPT1; // PADDLE CONTROL INPUT 1 WO
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byte INPT2; // PADDLE CONTROL INPUT 2 WO
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byte INPT3; // PADDLE CONTROL INPUT 3 WO
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byte INPT4; // PLAYER 0 FIRE BUTTON INPUT WO
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byte INPT5; // PLAYER 1 FIRE BUTTON INPUT WO
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byte _0e_14[7];
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byte AUDC0; // AUDIO CONTROL CHANNEL 0 WO
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byte AUDC1; // AUDIO CONTROL CHANNEL 1 WO
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byte AUDF0; // AUDIO FREQUENCY CHANNEL 0 WO
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byte AUDF1; // AUDIO FREQUENCY CHANNEL 1 WO
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byte AUDV0; // AUDIO VOLUME CHANNEL 0 WO
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byte AUDV1; // AUDIO VOLUME CHANNEL 1 WO
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} t_TIA;
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typedef struct t_MARIA {
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byte BACKGRND ;// X '20' BACKGROUND COLOR R/W
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byte P0C1 ;// X '21' PALETTE 0 - COLOR 1 R/W
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byte P0C2 ;// X '22' - COLOR 2 R/W
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byte P0C3 ;// X '23' - COLOR 3 R/W
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byte WSYNC ;// X '24' WAIT FOR SYNC STROBE
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byte P1C1 ;// X '25' PALETTE 1 - COLOR 1 R/W
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byte P1C2 ;// X '26' - COLOR 2 R/W
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byte P1C3 ;// X '27' - COLOR 3 R/W
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byte MSTAT ;// X '28' MARIA STATUS RO
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byte P2C1 ;// X '29' PALETTE 2 - COLOR 1 R/W
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byte P2C2 ;// X '2A' - COLOR 2 R/W
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byte P2C3 ;// X '2B' - COLOR 3 R/W
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byte DPPH ;// X '2C' DISPLAY LIST LIST POINT HIGH WO
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byte P3C1 ;// X '2D' PALETTE 3 - COLOR 1 R/W
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byte P3C2 ;// X '2E' - COLOR 2 R/W
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byte P3C3 ;// X '2F' - COLOR 3 R/W
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byte DPPL ;// X '30' DISPLAY LIST LIST POINT LOW WO
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byte P4C1 ;// X '31' PALETTE 4 - COLOR 1 R/W
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byte P4C2 ;// X '32' - COLOR 2 R/W
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byte P4C3 ;// X '33' - COLOR 3 R/W
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byte CHARBASE ;// X '34' CHARACTER BASE ADDRESS WO
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byte P5C1 ;// X '35' PALETTE 5 - COLOR 1 R/W
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byte P5C2 ;// X '36' - COLOR 2 R/W
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byte P5C3 ;// X '37' - COLOR 3 R/W
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byte OFFSET ;// X '38' FOR FUTURE EXPANSION -STORE ZERO HERE R/W
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byte P6C1 ;// X '39' PALETTE 6 - COLOR 1 R/W
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byte P6C2 ;// X '3A' - COLOR 2 R/W
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byte P6C3 ;// X '3B' - COLOR 3 R/W
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byte CTRL ;// X '3C' MARIA CONTROL REGISTER WO
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byte P7C1 ;// X '3D' PALETTE 7 - COLOR 1 R/W
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byte P7C2 ;// X '3E' - COLOR 2 R/W
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byte P7C3 ;// X '3F' - COLOR 3 R/W
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} t_MARIA;
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typedef struct t_P6532 {
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byte SWCHA; // P0,P1 JOYSTICK DIRECTIONAL INPUT R/W
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byte CTLSWA; // CONSOLE SWITCHES RO
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byte SWCHB; // I/O CONTROL FOR SWCHA R/W
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byte CTLSWB; // I/O CONTROL FOR SWCHB R/W
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} t_P6532;
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typedef struct DLLEntry {
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byte offset_flags;
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/*
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unsigned int offset:4;
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unsigned int _unused:1;
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unsigned int h8:1;
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unsigned int h16:1;
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unsigned int dli:1;
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*/
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byte dl_hi;
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byte dl_lo;
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} DLLEntry;
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typedef struct DL4Entry {
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byte data_lo;
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byte width_pal;
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/*
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unsigned int width:5;
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unsigned int palette:3;
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*/
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byte data_hi;
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byte xpos;
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} DL4Entry;
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typedef struct DL5Entry {
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byte data_lo;
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byte flags;
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byte data_hi;
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byte width_pal;
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/*
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unsigned int width:5;
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unsigned int palette:3;
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*/
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byte xpos;
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} DL5Entry;
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/// CONSTANTS
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#define DLL_DLI 0x80 // Display List Interrupt flag
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#define DLL_H16 0x40 // Holey DMA 4k flag
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#define DLL_H8 0x20 // Holey DMA 2k flag
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#define DL5_WM 0x80 // Write Mode
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#define DL5_DIRECT 0x40 // Direct Mode
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#define DL5_INDIRECT 0x60 // Indirect Mode
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#define DL_WIDTH(x) (32-(x)) // for width_pal
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#define DL_PAL(x) ((x)<<5) // OR them together
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#define DL_WP(w,p) (DL_WIDTH(w)|DL_PAL(p))
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#define CTRL_COLORKILL 0x80
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#define CTRL_DMA_ON 0x40
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#define CTRL_DMA_OFF 0x60
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#define CTRL_DBLBYTE 0x10
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#define CTRL_BLKBORDER 0x08
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#define CTRL_KANGAROO 0x04
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#define CTRL_160AB 0x00
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#define CTRL_320BD 0x02
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#define CTRL_320AC 0x03
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#define MSTAT_VBLANK 0x80
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/// GLOBALS
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#define TIA (*((t_TIA*) 0x00))
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#define MARIA (*((t_MARIA*) 0x20))
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#define P6532 (*((t_P6532*) 0x280))
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/// MACROS
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#define STROBE(addr) __asm__ ("sta %w", addr)
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#define WSYNC() STROBE(0x24)
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