| 3 |
|
* EmulateLine() function, the same for |
| 4 |
|
* both 6510 and 6502) |
| 5 |
|
* |
| 6 |
< |
* Frodo (C) 1994-1997,2002-2003 Christian Bauer |
| 6 |
> |
* Frodo (C) 1994-1997,2002-2005 Christian Bauer |
| 7 |
|
* |
| 8 |
|
* This program is free software; you can redistribute it and/or modify |
| 9 |
|
* it under the terms of the GNU General Public License as published by |
| 758 |
|
|
| 759 |
|
// Jump/branch group |
| 760 |
|
case 0x4c: // JMP abs |
| 761 |
< |
jump(read_adr_abs()); |
| 761 |
> |
adr = read_adr_abs(); |
| 762 |
> |
jump(adr); |
| 763 |
|
ENDOP(3); |
| 764 |
|
|
| 765 |
|
case 0x6c: // JMP (ind) |
| 766 |
|
adr = read_adr_abs(); |
| 767 |
< |
jump(read_byte(adr) | (read_byte((adr + 1) & 0xff | adr & 0xff00) << 8)); |
| 767 |
> |
adr = read_byte(adr) | (read_byte((adr + 1) & 0xff | adr & 0xff00) << 8); |
| 768 |
> |
jump(adr); |
| 769 |
|
ENDOP(5); |
| 770 |
|
|
| 771 |
|
case 0x20: // JSR abs |
| 774 |
|
#else |
| 775 |
|
push_byte(pc+1 >> 8); push_byte(pc+1); |
| 776 |
|
#endif |
| 777 |
< |
jump(read_adr_abs()); |
| 777 |
> |
adr = read_adr_abs(); |
| 778 |
> |
jump(adr); |
| 779 |
|
ENDOP(6); |
| 780 |
|
|
| 781 |
|
case 0x60: // RTS |
| 782 |
|
adr = pop_byte(); // Split because of pop_byte ++sp side-effect |
| 783 |
< |
jump((adr | pop_byte() << 8) + 1); |
| 783 |
> |
adr = (adr | pop_byte() << 8) + 1; |
| 784 |
> |
jump(adr); |
| 785 |
|
ENDOP(6); |
| 786 |
|
|
| 787 |
|
case 0x40: // RTI |
| 788 |
|
pop_flags(); |
| 789 |
|
adr = pop_byte(); // Split because of pop_byte ++sp side-effect |
| 790 |
< |
jump(adr | pop_byte() << 8); |
| 790 |
> |
adr = adr | pop_byte() << 8; |
| 791 |
> |
jump(adr); |
| 792 |
|
if (interrupt.intr_any && !i_flag) |
| 793 |
|
goto handle_int; |
| 794 |
|
ENDOP(6); |
| 801 |
|
#endif |
| 802 |
|
push_flags(true); |
| 803 |
|
i_flag = true; |
| 804 |
< |
jump(read_word(0xfffe)); |
| 804 |
> |
adr = read_word(0xfffe); |
| 805 |
> |
jump(adr); |
| 806 |
|
ENDOP(7); |
| 807 |
|
|
| 808 |
|
#if PC_IS_POINTER |
| 1329 |
|
v_flag = (tmp2 ^ a) & 0x40; |
| 1330 |
|
if ((tmp2 & 0x0f) + (tmp2 & 0x01) > 5) |
| 1331 |
|
a = a & 0xf0 | (a + 6) & 0x0f; |
| 1332 |
< |
if (c_flag = ((tmp2 + (tmp2 & 0x10)) & 0x1f0) > 0x50) |
| 1332 |
> |
if ((c_flag = ((tmp2 + (tmp2 & 0x10)) & 0x1f0) > 0x50) != 0) |
| 1333 |
|
a += 0x60; |
| 1334 |
|
} |
| 1335 |
|
ENDOP(2); |
