Mercurial > repos > blastem

comparison vdp.h @ 317:e5e8b48ad157

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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
comparison
equal deleted inserted replaced
316:fd7c24b97ebf 317:e5e8b48ad157
28 #define FBUF_SRC_S 0x6000 28 #define FBUF_SRC_S 0x6000
29 #define FBUF_SRC_BG 0x8000 29 #define FBUF_SRC_BG 0x8000
30 30
31 #define MCLKS_LINE 3420 31 #define MCLKS_LINE 3420
32 32
33 #define FLAG_DOT_OFLOW 0x1 33 #define FLAG_DOT_OFLOW 0x01
34 #define FLAG_CAN_MASK 0x2 34 #define FLAG_CAN_MASK 0x02
35 #define FLAG_MASKED 0x4 35 #define FLAG_MASKED 0x04
36 #define FLAG_WINDOW 0x8 36 #define FLAG_WINDOW 0x08
37 #define FLAG_PENDING 0x10 37 #define FLAG_PENDING 0x10
38 #define FLAG_UNUSED_SLOT 0x20 38 #define FLAG_UNUSED_SLOT 0x20
39 #define FLAG_DMA_RUN 0x40 39 #define FLAG_DMA_RUN 0x40
40 #define FLAG_DMA_PROG 0x80 40 #define FLAG_DMA_PROG 0x80
41
42 #define FLAG2_VINT_PENDING 0x01
43 #define FLAG2_HINT_PENDING 0x02
41 44
42 #define DISPLAY_ENABLE 0x40 45 #define DISPLAY_ENABLE 0x40
43 46
44 enum { 47 enum {
45 REG_MODE_1=0, 48 REG_MODE_1=0,
113 uint16_t col_1; 116 uint16_t col_1;
114 uint16_t col_2; 117 uint16_t col_2;
115 uint16_t dma_val; 118 uint16_t dma_val;
116 uint8_t v_offset; 119 uint8_t v_offset;
117 uint8_t dma_cd; 120 uint8_t dma_cd;
121 uint8_t hint_counter;
122 uint8_t flags2;
118 uint8_t *tmp_buf_a; 123 uint8_t *tmp_buf_a;
119 uint8_t *tmp_buf_b; 124 uint8_t *tmp_buf_b;
120 } vdp_context; 125 } vdp_context;
121 126
122 void init_vdp_context(vdp_context * context); 127 void init_vdp_context(vdp_context * context);
131 int vdp_data_port_write(vdp_context * context, uint16_t value); 136 int vdp_data_port_write(vdp_context * context, uint16_t value);
132 uint16_t vdp_control_port_read(vdp_context * context); 137 uint16_t vdp_control_port_read(vdp_context * context);
133 uint16_t vdp_data_port_read(vdp_context * context); 138 uint16_t vdp_data_port_read(vdp_context * context);
134 uint16_t vdp_hv_counter_read(vdp_context * context); 139 uint16_t vdp_hv_counter_read(vdp_context * context);
135 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction); 140 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction);
141 uint32_t vdp_next_hint(vdp_context * context);
142 uint32_t vdp_next_vint(vdp_context * context);
143 void vdp_int_ack(vdp_context * context, uint16_t int_num);
136 144
137 #endif //VDP_H_ 145 #endif //VDP_H_