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comparison vdp.c @ 1278:34d3cb05014d

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Fix VDP buffer overrun that was causing sprite flickering in some games
author Michael Pavone <pavone@retrodev.com>
date Mon, 13 Mar 2017 23:13:24 -0700
parents 6dedaa645843
children 76e47254596b
comparison
equal deleted inserted replaced
1277:78416556ae02 1278:34d3cb05014d
2270 vint_line = context->inactive_start; 2270 vint_line = context->inactive_start;
2271 active_line = 0x1FF; 2271 active_line = 0x1FF;
2272 } else { 2272 } else {
2273 bg_end_slot = BG_START_SLOT + (256+HORIZ_BORDER)/2; 2273 bg_end_slot = BG_START_SLOT + (256+HORIZ_BORDER)/2;
2274 max_draws = MAX_DRAWS_H32_MODE4; 2274 max_draws = MAX_DRAWS_H32_MODE4;
2275 max_sprites = 8;
2275 buf_clear_slot = 136; 2276 buf_clear_slot = 136;
2276 index_reset_slot = 253; 2277 index_reset_slot = 253;
2277 index_reset_value = 0; 2278 index_reset_value = 0;
2278 vint_line = context->inactive_start + 1; 2279 vint_line = context->inactive_start + 1;
2279 vint_slot = VINT_SLOT_MODE4; 2280 vint_slot = VINT_SLOT_MODE4;
2310 context->sprite_draws = MAX_DRAWS_H32_MODE4; 2311 context->sprite_draws = MAX_DRAWS_H32_MODE4;
2311 } 2312 }
2312 memset(context->linebuf, 0, LINEBUF_SIZE); 2313 memset(context->linebuf, 0, LINEBUF_SIZE);
2313 } else if (context->hslot == index_reset_slot) { 2314 } else if (context->hslot == index_reset_slot) {
2314 context->sprite_index = index_reset_value; 2315 context->sprite_index = index_reset_value;
2315 context->slot_counter = max_draws; 2316 context->slot_counter = max_sprites;
2316 } else if (context->vcounter == vint_line && context->hslot == vint_slot) { 2317 } else if (context->vcounter == vint_line && context->hslot == vint_slot) {
2317 context->flags2 |= FLAG2_VINT_PENDING; 2318 context->flags2 |= FLAG2_VINT_PENDING;
2318 context->pending_vint_start = context->cycles; 2319 context->pending_vint_start = context->cycles;
2319 } 2320 }
2320 2321