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comparison vdp.c @ 1366:c74a2f31ae5f

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Fix regression in horizontal interrupt timing that was breaking the "water" palette swap in the Sonic series and other games
author Michael Pavone <pavone@retrodev.com>
date Mon, 22 May 2017 21:11:13 -0700
parents 6dd2c3edd0b5
children 4c5a78555209
comparison
equal deleted inserted replaced
1365:6dd2c3edd0b5 1366:c74a2f31ae5f
3281 if (hint_line > context->inactive_start) { 3281 if (hint_line > context->inactive_start) {
3282 hint_line = context->regs[REG_HINT]; 3282 hint_line = context->regs[REG_HINT];
3283 if (hint_line > context->inactive_start) { 3283 if (hint_line > context->inactive_start) {
3284 return 0xFFFFFFFF; 3284 return 0xFFFFFFFF;
3285 } 3285 }
3286 if (hint_line >= context->vcounter) {
3287 //Next interrupt is for a line in the next frame that
3288 //is higher than the line we're on now so just passing
3289 //that line number to vdp_cycles_to_line will yield the wrong
3290 //result
3291 return context->cycles + vdp_cycles_to_line(context, 0) + hint_line * MCLKS_LINE - HINT_FUDGE;
3292 }
3286 } 3293 }
3287 } else { 3294 } else {
3288 uint32_t jump_start, jump_dst; 3295 uint32_t jump_start, jump_dst;
3289 get_jump_params(context, &jump_start, &jump_dst); 3296 get_jump_params(context, &jump_start, &jump_dst);
3290 if (hint_line >= jump_start && context->vcounter < jump_dst) { 3297 if (hint_line >= jump_start && context->vcounter < jump_dst) {