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authorvin <git@vineetk.net>2024-06-10 12:50:00 +0530
committervin <git@vineetk.net>2024-06-10 14:28:07 +0530
commite07d5917a1625e207d1ba96b7e0d1e1c493040b2 (patch)
tree049c23a5bccd4849b67ec88c779de1840f544acc
parent23008662cea16d4ad2a3253d883a634258378d60 (diff)
implement se?() opcodes and remove extra 65c02 opcodes
Diffstat
-rw-r--r--cpu.c420
1 files changed, 3 insertions, 417 deletions
diff --git a/cpu.c b/cpu.c
index 8c88959..c0e3877 100644
--- a/cpu.c
+++ b/cpu.c
@@ -207,18 +207,6 @@ asl(uint8_t arg)
207} 207}
208 208
209static void 209static void
210bbr(uint8_t arg)
211{
212/* TODO: complete this */
213}
214
215static void
216bbs(uint8_t arg)
217{
218/* TODO: complete this */
219}
220
221static void
222bcc(uint8_t arg) 210bcc(uint8_t arg)
223{ 211{
224 if (regs.status.carry == 0) 212 if (regs.status.carry == 0)
@@ -269,12 +257,6 @@ bpl(uint8_t arg)
269} 257}
270 258
271static void 259static void
272bra(uint8_t arg)
273{
274/* TODO: complete this */
275}
276
277static void
278brk(void) 260brk(void)
279{ 261{
280 /* TODO: push regs.pc and regs.status to stack and load IRQ vector */ 262 /* TODO: push regs.pc and regs.status to stack and load IRQ vector */
@@ -528,12 +510,6 @@ ply(uint8_t arg)
528} 510}
529 511
530static void 512static void
531rmb(uint8_t arg)
532{
533/* TODO: complete this */
534}
535
536static void
537rol(uint8_t arg) 513rol(uint8_t arg)
538{ 514{
539/* TODO: complete this */ 515/* TODO: complete this */
@@ -567,25 +543,19 @@ sbc(uint8_t arg)
567static void 543static void
568sec(uint8_t arg) 544sec(uint8_t arg)
569{ 545{
570/* TODO: complete this */ 546 regs.status.carry = 1;
571} 547}
572 548
573static void 549static void
574sed(uint8_t arg) 550sed(uint8_t arg)
575{ 551{
576/* TODO: complete this */ 552 regs.status.decimal_mode = 1;
577} 553}
578 554
579static void 555static void
580sei(uint8_t arg) 556sei(uint8_t arg)
581{ 557{
582/* TODO: complete this */ 558 regs.status.interrupt_disable = 1;
583}
584
585static void
586smb(uint8_t arg)
587{
588/* TODO: complete this */
589} 559}
590 560
591static void 561static void
@@ -595,12 +565,6 @@ sta(uint8_t arg)
595} 565}
596 566
597static void 567static void
598stp(uint8_t arg)
599{
600/* TODO: complete this */
601}
602
603static void
604stx(uint8_t arg) 568stx(uint8_t arg)
605{ 569{
606/* TODO: complete this */ 570/* TODO: complete this */
@@ -613,12 +577,6 @@ sty(uint8_t arg)
613} 577}
614 578
615static void 579static void
616stz(uint8_t arg)
617{
618/* TODO: complete this */
619}
620
621static void
622tax(void) 580tax(void)
623{ 581{
624 regs.x = regs.a; 582 regs.x = regs.a;
@@ -634,18 +592,6 @@ tay(uint8_t arg)
634} 592}
635 593
636static void 594static void
637trb(uint8_t arg)
638{
639/* TODO: complete this */
640}
641
642static void
643tsb(uint8_t arg)
644{
645/* TODO: complete this */
646}
647
648static void
649tsx(uint8_t arg) 595tsx(uint8_t arg)
650{ 596{
651/* TODO: complete this */ 597/* TODO: complete this */
@@ -670,18 +616,6 @@ tya(uint8_t arg)
670} 616}
671 617
672static void 618static void
673wai(uint8_t arg)
674{
675/* TODO: complete this */
676}
677
678static void
679unp(uint8_t arg)
680{
681/* TODO: complete this */
682}
683
684static void
685interpret(void) 619interpret(void)
686{ 620{
687 uint8_t opcode; 621 uint8_t opcode;
@@ -784,70 +718,6 @@ interpret(void)
784 asl(opcode_arg(AM_ABS_X)); 718 asl(opcode_arg(AM_ABS_X));
785 cycles += 6; 719 cycles += 6;
786 break; 720 break;
787 case 0x0f:
788 bbr(opcode_arg(AM_REL));
789 cycles += 4;
790 break;
791 case 0x1f:
792 bbr(opcode_arg(AM_REL));
793 cycles += 4;
794 break;
795 case 0x2f:
796 bbr(opcode_arg(AM_REL));
797 cycles += 4;
798 break;
799 case 0x3f:
800 bbr(opcode_arg(AM_REL));
801 cycles += 4;
802 break;
803 case 0x4f:
804 bbr(opcode_arg(AM_REL));
805 cycles += 4;
806 break;
807 case 0x5f:
808 bbr(opcode_arg(AM_REL));
809 cycles += 4;
810 break;
811 case 0x6f:
812 bbr(opcode_arg(AM_REL));
813 cycles += 4;
814 break;
815 case 0x7f:
816 bbr(opcode_arg(AM_REL));
817 cycles += 4;
818 break;
819 case 0x8f:
820 bbs(opcode_arg(AM_REL));
821 cycles += 4;
822 break;
823 case 0x9f:
824 bbs(opcode_arg(AM_REL));
825 cycles += 4;
826 break;
827 case 0xaf:
828 bbs(opcode_arg(AM_REL));
829 cycles += 4;
830 break;
831 case 0xbf:
832 bbs(opcode_arg(AM_REL));
833 cycles += 4;
834 break;
835 case 0xcf:
836 bbs(opcode_arg(AM_REL));
837 cycles += 4;
838 break;
839 case 0xdf:
840 bbs(opcode_arg(AM_REL));
841 cycles += 4;
842 break;
843 case 0xef:
844 bbs(opcode_arg(AM_REL));
845 cycles += 4;
846 break;
847 case 0xff:
848 bbs(opcode_arg(AM_REL));
849 cycles += 4;
850 break;
851 case 0x90: 721 case 0x90:
852 bcc(opcode_arg(AM_IMM)); 722 bcc(opcode_arg(AM_IMM));
853 cycles += 2; 723 cycles += 2;
@@ -892,10 +762,6 @@ interpret(void)
892 bpl(opcode_arg(AM_IMM)); 762 bpl(opcode_arg(AM_IMM));
893 cycles += 2; 763 cycles += 2;
894 break; 764 break;
895 case 0x80:
896 bra(opcode_arg(AM_IMM));
897 cycles += 3;
898 break;
899 case 0x00: 765 case 0x00:
900 brk(); 766 brk();
901 cycles += 7; 767 cycles += 7;
@@ -1256,38 +1122,6 @@ interpret(void)
1256 ply(opcode_arg(AM_ACC)); 1122 ply(opcode_arg(AM_ACC));
1257 cycles += 4; 1123 cycles += 4;
1258 break; 1124 break;
1259 case 0x07:
1260 rmb(opcode_arg(AM_REL));
1261 cycles += 5;
1262 break;
1263 case 0x17:
1264 rmb(opcode_arg(AM_REL));
1265 cycles += 5;
1266 break;
1267 case 0x27:
1268 rmb(opcode_arg(AM_REL));
1269 cycles += 5;
1270 break;
1271 case 0x37:
1272 rmb(opcode_arg(AM_REL));
1273 cycles += 5;
1274 break;
1275 case 0x47:
1276 rmb(opcode_arg(AM_REL));
1277 cycles += 5;
1278 break;
1279 case 0x57:
1280 rmb(opcode_arg(AM_REL));
1281 cycles += 5;
1282 break;
1283 case 0x67:
1284 rmb(opcode_arg(AM_REL));
1285 cycles += 5;
1286 break;
1287 case 0x77:
1288 rmb(opcode_arg(AM_REL));
1289 cycles += 5;
1290 break;
1291 case 0x2a: 1125 case 0x2a:
1292 rol(opcode_arg(AM_ACC)); 1126 rol(opcode_arg(AM_ACC));
1293 cycles += 2; 1127 cycles += 2;
@@ -1384,38 +1218,6 @@ interpret(void)
1384 sei(opcode_arg(AM_ACC)); 1218 sei(opcode_arg(AM_ACC));
1385 cycles += 2; 1219 cycles += 2;
1386 break; 1220 break;
1387 case 0x87:
1388 smb(opcode_arg(AM_REL));
1389 cycles += 5;
1390 break;
1391 case 0x97:
1392 smb(opcode_arg(AM_REL));
1393 cycles += 5;
1394 break;
1395 case 0xa7:
1396 smb(opcode_arg(AM_REL));
1397 cycles += 5;
1398 break;
1399 case 0xb7:
1400 smb(opcode_arg(AM_REL));
1401 cycles += 5;
1402 break;
1403 case 0xc7:
1404 smb(opcode_arg(AM_REL));
1405 cycles += 5;
1406 break;
1407 case 0xd7:
1408 smb(opcode_arg(AM_REL));
1409 cycles += 5;
1410 break;
1411 case 0xe7:
1412 smb(opcode_arg(AM_REL));
1413 cycles += 5;
1414 break;
1415 case 0xf7:
1416 smb(opcode_arg(AM_REL));
1417 cycles += 5;
1418 break;
1419 case 0x85: 1221 case 0x85:
1420 sta(opcode_arg(AM_ZP)); 1222 sta(opcode_arg(AM_ZP));
1421 cycles += 4; 1223 cycles += 4;
@@ -1448,10 +1250,6 @@ interpret(void)
1448 sta(opcode_arg(AM_IND_Y)); 1250 sta(opcode_arg(AM_IND_Y));
1449 cycles += 7; 1251 cycles += 7;
1450 break; 1252 break;
1451 case 0xdb:
1452 stp(opcode_arg(AM_ACC));
1453 cycles += 2;
1454 break;
1455 case 0x86: 1253 case 0x86:
1456 stx(opcode_arg(AM_ZP)); 1254 stx(opcode_arg(AM_ZP));
1457 cycles += 4; 1255 cycles += 4;
@@ -1476,22 +1274,6 @@ interpret(void)
1476 sty(opcode_arg(AM_ABS)); 1274 sty(opcode_arg(AM_ABS));
1477 cycles += 5; 1275 cycles += 5;
1478 break; 1276 break;
1479 case 0x64:
1480 stz(opcode_arg(AM_ZP));
1481 cycles += 4;
1482 break;
1483 case 0x74:
1484 stz(opcode_arg(AM_ZP_X));
1485 cycles += 5;
1486 break;
1487 case 0x9c:
1488 stz(opcode_arg(AM_ABS));
1489 cycles += 5;
1490 break;
1491 case 0x9e:
1492 stz(opcode_arg(AM_ABS_X));
1493 cycles += 6;
1494 break;
1495 case 0xaa: 1277 case 0xaa:
1496 tax(); 1278 tax();
1497 cycles += 2; 1279 cycles += 2;
@@ -1500,22 +1282,6 @@ interpret(void)
1500 tay(opcode_arg(AM_ACC)); 1282 tay(opcode_arg(AM_ACC));
1501 cycles += 2; 1283 cycles += 2;
1502 break; 1284 break;
1503 case 0x14:
1504 trb(opcode_arg(AM_ZP));
1505 cycles += 5;
1506 break;
1507 case 0x1c:
1508 trb(opcode_arg(AM_ABS));
1509 cycles += 6;
1510 break;
1511 case 0x04:
1512 tsb(opcode_arg(AM_ZP));
1513 cycles += 5;
1514 break;
1515 case 0x0c:
1516 tsb(opcode_arg(AM_ABS));
1517 cycles += 6;
1518 break;
1519 case 0xba: 1285 case 0xba:
1520 tsx(opcode_arg(AM_ACC)); 1286 tsx(opcode_arg(AM_ACC));
1521 cycles += 2; 1287 cycles += 2;
@@ -1532,186 +1298,6 @@ interpret(void)
1532 tya(opcode_arg(AM_ACC)); 1298 tya(opcode_arg(AM_ACC));
1533 cycles += 2; 1299 cycles += 2;
1534 break; 1300 break;
1535 case 0xcb:
1536 wai(opcode_arg(AM_ACC));
1537 cycles += 5;
1538 break;
1539 case 0x03:
1540 unp(opcode_arg(AM_ACC));
1541 cycles += 1;
1542 break;
1543 case 0x0b:
1544 unp(opcode_arg(AM_ACC));
1545 cycles += 1;
1546 break;
1547 case 0x13:
1548 unp(opcode_arg(AM_ACC));
1549 cycles += 1;
1550 break;
1551 case 0x1b:
1552 unp(opcode_arg(AM_ACC));
1553 cycles += 1;
1554 break;
1555 case 0x23:
1556 unp(opcode_arg(AM_ACC));
1557 cycles += 1;
1558 break;
1559 case 0x2b:
1560 unp(opcode_arg(AM_ACC));
1561 cycles += 1;
1562 break;
1563 case 0x33:
1564 unp(opcode_arg(AM_ACC));
1565 cycles += 1;
1566 break;
1567 case 0x3b:
1568 unp(opcode_arg(AM_ACC));
1569 cycles += 1;
1570 break;
1571 case 0x43:
1572 unp(opcode_arg(AM_ACC));
1573 cycles += 1;
1574 break;
1575 case 0x4b:
1576 unp(opcode_arg(AM_ACC));
1577 cycles += 1;
1578 break;
1579 case 0x53:
1580 unp(opcode_arg(AM_ACC));
1581 cycles += 1;
1582 break;
1583 case 0x5b:
1584 unp(opcode_arg(AM_ACC));
1585 cycles += 1;
1586 break;
1587 case 0x63:
1588 unp(opcode_arg(AM_ACC));
1589 cycles += 1;
1590 break;
1591 case 0x6b:
1592 unp(opcode_arg(AM_ACC));
1593 cycles += 1;
1594 break;
1595 case 0x73:
1596 unp(opcode_arg(AM_ACC));
1597 cycles += 1;
1598 break;
1599 case 0x7b:
1600 unp(opcode_arg(AM_ACC));
1601 cycles += 1;
1602 break;
1603 case 0x83:
1604 unp(opcode_arg(AM_ACC));
1605 cycles += 1;
1606 break;
1607 case 0x8b:
1608 unp(opcode_arg(AM_ACC));
1609 cycles += 1;
1610 break;
1611 case 0x93:
1612 unp(opcode_arg(AM_ACC));
1613 cycles += 1;
1614 break;
1615 case 0x9b:
1616 unp(opcode_arg(AM_ACC));
1617 cycles += 1;
1618 break;
1619 case 0xa3:
1620 unp(opcode_arg(AM_ACC));
1621 cycles += 1;
1622 break;
1623 case 0xab:
1624 unp(opcode_arg(AM_ACC));
1625 cycles += 1;
1626 break;
1627 case 0xb3:
1628 unp(opcode_arg(AM_ACC));
1629 cycles += 1;
1630 break;
1631 case 0xbb:
1632 unp(opcode_arg(AM_ACC));
1633 cycles += 1;
1634 break;
1635 case 0xc3:
1636 unp(opcode_arg(AM_ACC));
1637 cycles += 1;
1638 break;
1639 case 0xd3:
1640 unp(opcode_arg(AM_ACC));
1641 cycles += 1;
1642 break;
1643 case 0xe3:
1644 unp(opcode_arg(AM_ACC));
1645 cycles += 1;
1646 break;
1647 case 0xeb:
1648 unp(opcode_arg(AM_ACC));
1649 cycles += 1;
1650 break;
1651 case 0xf3:
1652 unp(opcode_arg(AM_ACC));
1653 cycles += 1;
1654 break;
1655 case 0xfb:
1656 unp(opcode_arg(AM_ACC));
1657 cycles += 1;
1658 break;
1659 case 0x02:
1660 unp(opcode_arg(AM_IMM));
1661 cycles += 2;
1662 break;
1663 case 0x22:
1664 unp(opcode_arg(AM_IMM));
1665 cycles += 2;
1666 break;
1667 case 0x42:
1668 unp(opcode_arg(AM_IMM));
1669 cycles += 2;
1670 break;
1671 case 0x62:
1672 unp(opcode_arg(AM_IMM));
1673 cycles += 2;
1674 break;
1675 case 0x82:
1676 unp(opcode_arg(AM_IMM));
1677 cycles += 2;
1678 break;
1679 case 0xc2:
1680 unp(opcode_arg(AM_IMM));
1681 cycles += 2;
1682 break;
1683 case 0xe2:
1684 unp(opcode_arg(AM_IMM));
1685 cycles += 2;
1686 break;
1687 case 0x44:
1688 unp(opcode_arg(AM_ZP));
1689 cycles += 3;
1690 break;
1691 case 0x54:
1692 unp(opcode_arg(AM_ZP_X));
1693 cycles += 4;
1694 break;
1695 case 0xd4:
1696 unp(opcode_arg(AM_ZP_X));
1697 cycles += 4;
1698 break;
1699 case 0xf4:
1700 unp(opcode_arg(AM_ZP_X));
1701 cycles += 4;
1702 break;
1703 case 0x5c:
1704 unp(opcode_arg(AM_ABS));
1705 cycles += 8;
1706 break;
1707 case 0xdc:
1708 unp(opcode_arg(AM_ABS_X));
1709 cycles += 4;
1710 break;
1711 case 0xfc:
1712 unp(opcode_arg(AM_ABS_X));
1713 cycles += 4;
1714 break;
1715 default: 1301 default:
1716 printf("opcode $%02X not implemented\n", opcode); 1302 printf("opcode $%02X not implemented\n", opcode);
1717 break; 1303 break;
generated by cgit v1.2.3 (git 2.25.1) at 2026-09-03 06:01:13 +0000