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comparison blastem.c @ 717:22dbdf50d33c

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Small correction to VBLANK flag timing. Fixed some inconsistencies in interrupt timing calculation.
author Michael Pavone <pavone@retrodev.com>
date Tue, 19 May 2015 23:23:53 -0700
parents 72ab94527a8a
children eaba6789f316
comparison
equal deleted inserted replaced
716:b707a8ddc202 717:22dbdf50d33c
123 return 0; 123 return 0;
124 } 124 }
125 125
126 void adjust_int_cycle(m68k_context * context, vdp_context * v_context) 126 void adjust_int_cycle(m68k_context * context, vdp_context * v_context)
127 { 127 {
128 //static int old_int_cycle = CYCLE_NEVER;
128 genesis_context *gen = context->system; 129 genesis_context *gen = context->system;
129 if (context->sync_cycle - context->current_cycle > gen->max_cycles) { 130 if (context->sync_cycle - context->current_cycle > gen->max_cycles) {
130 context->sync_cycle = context->current_cycle + gen->max_cycles; 131 context->sync_cycle = context->current_cycle + gen->max_cycles;
131 } 132 }
132 context->int_cycle = CYCLE_NEVER; 133 context->int_cycle = CYCLE_NEVER;
145 146
146 } 147 }
147 } 148 }
148 } 149 }
149 } 150 }
151 /*if (context->int_cycle != old_int_cycle) {
152 printf("int cycle changed to: %d, level: %d @ %d(%d), frame: %d, vcounter: %d, hslot: %d, mask: %d, hint_counter: %d\n", context->int_cycle, context->int_num, v_context->cycles, context->current_cycle, v_context->frame, v_context->vcounter, v_context->hslot, context->status & 0x7, v_context->hint_counter);
153 old_int_cycle = context->int_cycle;
154 }*/
150 155
151 context->target_cycle = context->int_cycle < context->sync_cycle ? context->int_cycle : context->sync_cycle; 156 context->target_cycle = context->int_cycle < context->sync_cycle ? context->int_cycle : context->sync_cycle;
152 /*printf("Cyc: %d, Trgt: %d, Int Cyc: %d, Int: %d, Mask: %X, V: %d, H: %d, HICount: %d, HReg: %d, Line: %d\n", 157 /*printf("Cyc: %d, Trgt: %d, Int Cyc: %d, Int: %d, Mask: %X, V: %d, H: %d, HICount: %d, HReg: %d, Line: %d\n",
153 context->current_cycle, context->target_cycle, context->int_cycle, context->int_num, (context->status & 0x7), 158 context->current_cycle, context->target_cycle, context->int_cycle, context->int_num, (context->status & 0x7),
154 v_context->regs[REG_MODE_2] & 0x20, v_context->regs[REG_MODE_1] & 0x10, v_context->hint_counter, v_context->regs[REG_HINT], v_context->cycles / MCLKS_LINE);*/ 159 v_context->regs[REG_MODE_2] & 0x20, v_context->regs[REG_MODE_1] & 0x10, v_context->hint_counter, v_context->regs[REG_HINT], v_context->cycles / MCLKS_LINE);*/
240 } 245 }
241 gen->frame_end = vdp_cycles_to_frame_end(v_context); 246 gen->frame_end = vdp_cycles_to_frame_end(v_context);
242 context->sync_cycle = gen->frame_end; 247 context->sync_cycle = gen->frame_end;
243 //printf("Set sync cycle to: %d @ %d, vcounter: %d, hslot: %d\n", context->sync_cycle, context->current_cycle, v_context->vcounter, v_context->hslot); 248 //printf("Set sync cycle to: %d @ %d, vcounter: %d, hslot: %d\n", context->sync_cycle, context->current_cycle, v_context->vcounter, v_context->hslot);
244 if (context->int_ack) { 249 if (context->int_ack) {
250 printf("acknowledging %d @ %d:%d, vcounter: %d, hslot: %d\n", context->int_ack, context->current_cycle, v_context->cycles, v_context->vcounter, v_context->hslot);
245 vdp_int_ack(v_context, context->int_ack); 251 vdp_int_ack(v_context, context->int_ack);
246 context->int_ack = 0; 252 context->int_ack = 0;
247 } 253 }
248 adjust_int_cycle(context, v_context); 254 adjust_int_cycle(context, v_context);
249 if (address) { 255 if (address) {