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comparison blastem.c @ 344:b46771135442

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Handle busack across frame boundary
author Mike Pavone <pavone@retrodev.com>
date Sun, 19 May 2013 11:38:15 -0700
parents 467bfa17004a
children 29d2ca563499
comparison
equal deleted inserted replaced
343:467bfa17004a 344:b46771135442
206 frame++; 206 frame++;
207 mclks -= mclks_per_frame; 207 mclks -= mclks_per_frame;
208 vdp_adjust_cycles(v_context, mclks_per_frame); 208 vdp_adjust_cycles(v_context, mclks_per_frame);
209 io_adjust_cycles(&gamepad_1, context->current_cycle, mclks_per_frame/MCLKS_PER_68K); 209 io_adjust_cycles(&gamepad_1, context->current_cycle, mclks_per_frame/MCLKS_PER_68K);
210 io_adjust_cycles(&gamepad_2, context->current_cycle, mclks_per_frame/MCLKS_PER_68K); 210 io_adjust_cycles(&gamepad_2, context->current_cycle, mclks_per_frame/MCLKS_PER_68K);
211 if (busack_cycle != CYCLE_NEVER) {
212 if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) {
213 busack_cycle -= mclks_per_frame/MCLKS_PER_68K;
214 } else {
215 busack_cycle = CYCLE_NEVER;
216 busack = new_busack;
217 }
218 }
211 context->current_cycle -= mclks_per_frame/MCLKS_PER_68K; 219 context->current_cycle -= mclks_per_frame/MCLKS_PER_68K;
212 if (z_context->current_cycle >= mclks_per_frame/MCLKS_PER_Z80) { 220 if (z_context->current_cycle >= mclks_per_frame/MCLKS_PER_Z80) {
213 z_context->current_cycle -= mclks_per_frame/MCLKS_PER_Z80; 221 z_context->current_cycle -= mclks_per_frame/MCLKS_PER_Z80;
214 } else { 222 } else {
215 z_context->current_cycle = 0; 223 z_context->current_cycle = 0;
255 wait_render_frame(v_context, frame_limit); 263 wait_render_frame(v_context, frame_limit);
256 } 264 }
257 vdp_adjust_cycles(v_context, mclks_per_frame); 265 vdp_adjust_cycles(v_context, mclks_per_frame);
258 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); 266 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K);
259 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); 267 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K);
268 if (busack_cycle != CYCLE_NEVER) {
269 if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) {
270 busack_cycle -= mclks_per_frame/MCLKS_PER_68K;
271 } else {
272 busack_cycle = CYCLE_NEVER;
273 busack = new_busack;
274 }
275 }
260 } 276 }
261 } 277 }
262 context->current_cycle = v_context->cycles / MCLKS_PER_68K; 278 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
263 } 279 }
264 } else if(vdp_port < 8) { 280 } else if(vdp_port < 8) {
272 wait_render_frame(v_context, frame_limit); 288 wait_render_frame(v_context, frame_limit);
273 } 289 }
274 vdp_adjust_cycles(v_context, mclks_per_frame); 290 vdp_adjust_cycles(v_context, mclks_per_frame);
275 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); 291 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K);
276 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); 292 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K);
293 if (busack_cycle != CYCLE_NEVER) {
294 if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) {
295 busack_cycle -= mclks_per_frame/MCLKS_PER_68K;
296 } else {
297 busack_cycle = CYCLE_NEVER;
298 busack = new_busack;
299 }
300 }
277 } 301 }
278 } 302 }
279 if (blocked < 0) { 303 if (blocked < 0) {
280 blocked = vdp_control_port_write(v_context, value); 304 blocked = vdp_control_port_write(v_context, value);
281 } else { 305 } else {