Mercurial > repos > blastem

comparison vdp.c @ 720:15d9359fd771

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add some tests for hint timing and fix it properly this time.
author Michael Pavone <pavone@retrodev.com>
date Wed, 20 May 2015 22:27:51 -0700
parents 019d27995e32
children 8f5339961903
comparison
equal deleted inserted replaced
719:019d27995e32 720:15d9359fd771
1441 uint32_t const h40_hsync_cycles[] = {19, 20, 20, 20, 18, 20, 20, 20, 18, 20, 20, 20, 18, 20, 20, 20, 19}; 1441 uint32_t const h40_hsync_cycles[] = {19, 20, 20, 20, 18, 20, 20, 20, 18, 20, 20, 20, 18, 20, 20, 20, 19};
1442 1442
1443 void vdp_advance_line(vdp_context *context) 1443 void vdp_advance_line(vdp_context *context)
1444 { 1444 {
1445 context->vcounter++; 1445 context->vcounter++;
1446 context->vcounter &= 0x1FF;
1447 if (context->flags2 & FLAG2_REGION_PAL) {
1448 if (context->latched_mode & BIT_PAL) {
1449 if (context->vcounter == 0x10B) {
1450 context->vcounter = 0x1D2;
1451 }
1452 } else if (context->vcounter == 0x103){
1453 context->vcounter = 0x1CA;
1454 }
1455 } else if (!(context->latched_mode & BIT_PAL) && context->vcounter == 0xEB) {
1456 context->vcounter = 0x1E5;
1457 }
1458
1446 if (context->vcounter > (context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START)) { 1459 if (context->vcounter > (context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START)) {
1447 context->hint_counter = context->regs[REG_HINT]; 1460 context->hint_counter = context->regs[REG_HINT];
1448 } else if (context->hint_counter) { 1461 } else if (context->hint_counter) {
1449 context->hint_counter--; 1462 context->hint_counter--;
1450 } else { 1463 } else {
1563 } 1576 }
1564 1577
1565 } else { 1578 } else {
1566 vdp_advance_line(context); 1579 vdp_advance_line(context);
1567 } 1580 }
1568 context->vcounter &= 0x1FF;
1569 if (context->flags2 & FLAG2_REGION_PAL) {
1570 if (context->latched_mode & BIT_PAL) {
1571 if (context->vcounter == 0x10B) {
1572 context->vcounter = 0x1D2;
1573 }
1574 } else if (context->vcounter == 0x103){
1575 context->vcounter = 0x1CA;
1576 }
1577 } else if (!(context->latched_mode & BIT_PAL) && context->vcounter == 0xEB) {
1578 context->vcounter = 0x1E5;
1579 }
1580
1581 } 1581 }
1582 } 1582 }
1583 1583
1584 uint32_t vdp_run_to_vblank(vdp_context * context) 1584 uint32_t vdp_run_to_vblank(vdp_context * context)
1585 { 1585 {