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comparison vdp.h @ 2194:01ff005b08f6

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Very rudimentary support for Game Gear VDP emulation
author Michael Pavone <pavone@retrodev.com>
date Sun, 21 Aug 2022 22:29:47 -0700
parents a61b47d5489e
children dc4268a778bc
comparison
equal deleted inserted replaced
2193:d00fb9c6a6a2 2194:01ff005b08f6
159 VDP_DEBUG_PLANE, 159 VDP_DEBUG_PLANE,
160 VDP_DEBUG_VRAM, 160 VDP_DEBUG_VRAM,
161 VDP_DEBUG_CRAM, 161 VDP_DEBUG_CRAM,
162 VDP_DEBUG_COMPOSITE, 162 VDP_DEBUG_COMPOSITE,
163 VDP_NUM_DEBUG_TYPES 163 VDP_NUM_DEBUG_TYPES
164 };
165
166 enum {
167 VDP_GENESIS,
168 VDP_GAMEGEAR,
169 VDP_SMS2,
170 VDP_SMS,
171 VDP_TMS9918A
164 }; 172 };
165 173
166 typedef struct { 174 typedef struct {
167 system_header *system; 175 system_header *system;
168 //pointer to current line in framebuffer 176 //pointer to current line in framebuffer
243 uint8_t tmp_buf_b[SCROLL_BUFFER_SIZE]; 251 uint8_t tmp_buf_b[SCROLL_BUFFER_SIZE];
244 uint8_t enabled_debuggers; 252 uint8_t enabled_debuggers;
245 uint8_t debug_fb_indices[VDP_NUM_DEBUG_TYPES]; 253 uint8_t debug_fb_indices[VDP_NUM_DEBUG_TYPES];
246 uint8_t debug_modes[VDP_NUM_DEBUG_TYPES]; 254 uint8_t debug_modes[VDP_NUM_DEBUG_TYPES];
247 uint8_t pushed_frame; 255 uint8_t pushed_frame;
256 uint8_t type;
257 uint8_t cram_latch;
248 uint8_t vdpmem[]; 258 uint8_t vdpmem[];
249 } vdp_context; 259 } vdp_context;
250 260
251 261
252 262
253 vdp_context *init_vdp_context(uint8_t region_pal, uint8_t has_max_vsram); 263 vdp_context *init_vdp_context(uint8_t region_pal, uint8_t has_max_vsram, uint8_t type);
254 void vdp_free(vdp_context *context); 264 void vdp_free(vdp_context *context);
255 void vdp_run_context_full(vdp_context * context, uint32_t target_cycles); 265 void vdp_run_context_full(vdp_context * context, uint32_t target_cycles);
256 void vdp_run_context(vdp_context * context, uint32_t target_cycles); 266 void vdp_run_context(vdp_context * context, uint32_t target_cycles);
257 //runs from current cycle count to VBLANK for the current mode, returns ending cycle count 267 //runs from current cycle count to VBLANK for the current mode, returns ending cycle count
258 uint32_t vdp_run_to_vblank(vdp_context * context); 268 uint32_t vdp_run_to_vblank(vdp_context * context);