Mercurial > repos > blastem
diff vdp.h @ 317:e5e8b48ad157
Initial stab at horizontal interrupts and improving accuracy of vertical interrupts. Also added the VINT pending flag to status port.
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Fri, 10 May 2013 22:57:56 -0700 |
| parents | d3266cee02c9 |
| children | 8e2fa485c0f2 |
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--- a/vdp.h Thu May 09 20:59:49 2013 -0700 +++ b/vdp.h Fri May 10 22:57:56 2013 -0700 @@ -30,14 +30,17 @@ #define MCLKS_LINE 3420 -#define FLAG_DOT_OFLOW 0x1 -#define FLAG_CAN_MASK 0x2 -#define FLAG_MASKED 0x4 -#define FLAG_WINDOW 0x8 -#define FLAG_PENDING 0x10 -#define FLAG_UNUSED_SLOT 0x20 -#define FLAG_DMA_RUN 0x40 -#define FLAG_DMA_PROG 0x80 +#define FLAG_DOT_OFLOW 0x01 +#define FLAG_CAN_MASK 0x02 +#define FLAG_MASKED 0x04 +#define FLAG_WINDOW 0x08 +#define FLAG_PENDING 0x10 +#define FLAG_UNUSED_SLOT 0x20 +#define FLAG_DMA_RUN 0x40 +#define FLAG_DMA_PROG 0x80 + +#define FLAG2_VINT_PENDING 0x01 +#define FLAG2_HINT_PENDING 0x02 #define DISPLAY_ENABLE 0x40 @@ -115,6 +118,8 @@ uint16_t dma_val; uint8_t v_offset; uint8_t dma_cd; + uint8_t hint_counter; + uint8_t flags2; uint8_t *tmp_buf_a; uint8_t *tmp_buf_b; } vdp_context; @@ -133,5 +138,8 @@ uint16_t vdp_data_port_read(vdp_context * context); uint16_t vdp_hv_counter_read(vdp_context * context); void vdp_adjust_cycles(vdp_context * context, uint32_t deduction); +uint32_t vdp_next_hint(vdp_context * context); +uint32_t vdp_next_vint(vdp_context * context); +void vdp_int_ack(vdp_context * context, uint16_t int_num); #endif //VDP_H_