74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#ifndef GB_H
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#define GB_H
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#include <r_io.h>
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enum {
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GB_TIMERS_DIV = 0,
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GB_TIMERS_TIMA,
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GB_TIMERS_TMA,
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GB_TIMERS_TAC,
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};
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typedef struct gb_timers_t {
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ut64 seek;
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ut32 fd;
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ut16 odiv;
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ut16 div;
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ut8 buf[4];
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ut8 otma;
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st8 tima_wait;
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bool check_fedge;
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} GBTimers;
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GBTimers *gb_timers_open(RIO *io);
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void gb_timers_update(GBTimers *timers, ut32 cycles);
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void gb_timers_close(GBTimers *timers, RIO *io);
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typedef struct gb_joypad_t {
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ut8 *keys;
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int fd;
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ut16 up;
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ut16 down;
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ut16 left;
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ut16 right;
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ut16 a;
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ut16 b;
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ut16 start;
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ut16 select;
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ut8 data;
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ut8 odata;
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} GBJoypad;
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GBJoypad *gb_joypad_open(RIO *io);
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void gb_joypad_update(GBJoypad *joypad);
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void gb_joypad_close(GBJoypad *joypad, RIO *io);
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typedef struct gb_dma_t {
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ut64 seek; //17 bit seek and some flags
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int dma_fd; //fd representing the dma register
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int dma_bus_fd; //fd representing the memory bus while dma occupies it
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ut32 dma_bank_id;
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ut32 default_bank_id;
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// ut16 bus_occupancy_size;
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ut8 buf[0xa0];
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ut8 dst; //current dst addr low byte
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// ut8 todo; //cycles todo
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st8 frontrun; //cycles that read/write ops had frontrun the dma copy
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ut8 val;
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} GBDMA;
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#define GB_DMA_LAUNCH 0x20000
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#define GB_DMA_RUNNING 0x40000
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#define GB_DMA_ACTIVE 0x60000
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GBDMA *gb_dma_open(RIO *io, bool cgb);
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void gb_dma_update(GBDMA *dma, RIO *io, ut32 cycles, bool pre_exec);
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void gb_dma_close(GBDMA *dma, RIO *io);
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extern RIOPlugin r_io_plugin_gb_timers;
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extern RIOPlugin r_io_plugin_gb_mbc1;
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extern RIOPlugin r_io_plugin_gb_mbc2;
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extern RIOPlugin r_io_plugin_gb_joypad;
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#endif
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