diff options
| author | Mike Pavone <pavone@retrodev.com> | 2014-02-13 00:10:36 -0800 |
|---|---|---|
| committer | Mike Pavone <pavone@retrodev.com> | 2014-02-13 00:10:36 -0800 |
| commit | 3ef25e453e0c72b7dd19046f27977345f5dc0d2f (patch) | |
| tree | ac7f8c065a91752f90036f33c4e8007f71bdd2f3 | |
| parent | 10bf5c797c6fa99656a6af3b723c11c641fbc090 (diff) | |
Properly sync hardware when frame end is reached during DMA
| -rw-r--r-- | blastem.c | 49 |
1 files changed, 8 insertions, 41 deletions
@@ -319,28 +319,11 @@ m68k_context * vdp_port_write(uint32_t vdp_port, m68k_context * context, uint16_ while(v_context->flags & FLAG_DMA_RUN) { vdp_run_dma_done(v_context, mclks_per_frame); if (v_context->cycles >= mclks_per_frame) { - if (!headless) { - //printf("reached frame end | 68K Cycles: %d, MCLK Cycles: %d\n", context->current_cycle, v_context->cycles); - wait_render_frame(v_context, frame_limit); - } else if(exit_after){ - --exit_after; - if (!exit_after) { - exit(0); - } - } - vdp_adjust_cycles(v_context, mclks_per_frame); - genesis_context * gen = context->system; - io_adjust_cycles(gen->ports, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); - io_adjust_cycles(gen->ports+1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); - io_adjust_cycles(gen->ports+2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); - if (busack_cycle != CYCLE_NEVER) { - if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) { - busack_cycle -= mclks_per_frame/MCLKS_PER_68K; - } else { - busack_cycle = CYCLE_NEVER; - busack = new_busack; - } + context->current_cycle = v_context->cycles / MCLKS_PER_68K; + if (context->current_cycle * MCLKS_PER_68K < mclks_per_frame) { + ++context->current_cycle; } + sync_components(context, 0); } } //context->current_cycle = v_context->cycles / MCLKS_PER_68K; @@ -353,27 +336,11 @@ m68k_context * vdp_port_write(uint32_t vdp_port, m68k_context * context, uint16_ while(v_context->flags & FLAG_DMA_RUN) { vdp_run_dma_done(v_context, mclks_per_frame); if (v_context->cycles >= mclks_per_frame) { - if (!headless) { - wait_render_frame(v_context, frame_limit); - } else if(exit_after){ - --exit_after; - if (!exit_after) { - exit(0); - } - } - vdp_adjust_cycles(v_context, mclks_per_frame); - genesis_context * gen = context->system; - io_adjust_cycles(gen->ports, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); - io_adjust_cycles(gen->ports+1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); - io_adjust_cycles(gen->ports+2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); - if (busack_cycle != CYCLE_NEVER) { - if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) { - busack_cycle -= mclks_per_frame/MCLKS_PER_68K; - } else { - busack_cycle = CYCLE_NEVER; - busack = new_busack; - } + context->current_cycle = v_context->cycles / MCLKS_PER_68K; + if (context->current_cycle * MCLKS_PER_68K < mclks_per_frame) { + ++context->current_cycle; } + sync_components(context, 0); } } if (blocked < 0) { |