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annotate src/vdp.h @ 55:f9846719aa26

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Remove old 48K limit in assembler
author Michael Pavone <pavone@retrodev.com>
date Wed, 31 Aug 2016 22:41:05 -0700
parents 6e7bfe83d2b0
children
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1 #ifndef VDP_H_
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2 #define VDP_H_
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4 typedef struct {
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5 uint16_t *framebuffer;
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6 uint32_t cycles;
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7 uint32_t clock_inc;
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8 int pitch;
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10 uint16_t status;
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12 uint16_t vcounter;
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13 uint16_t hcounter;
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16 uint8_t vram[128*1024];
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17 uint16_t cram[256];
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04fc17376999 Sort of working tile rendering and tile test ROM
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19 uint16_t start_offset;
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21 uint8_t top_skip;
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22 uint8_t bottom_skip;
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23 uint8_t pal_select;
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25 uint8_t pal_write_index;
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26 uint8_t pal_write_count;
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27 } vdp;
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30 void vdp_init(vdp *context, uint32_t clock_div);
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31 void vdp_run(vdp *context, uint32_t target);
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32 void vdp_write_mode(vdp *context, uint16_t value);
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33 void vdp_write_cram(vdp *context, uint16_t value);
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34 uint32_t vdp_next_interrupt(vdp *context);
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35 void vdp_ack_interrupt(vdp *context);
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36 uint8_t vdp_interrupt_pending(vdp *context);
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37 uint8_t *vdp_get_back_buffer(vdp *context);
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39 #endif //VDP_H_