kc5tja / lib65816
A statically linked library containing an emulator for the W65C816 microprocessor.
| commit 7: | 38b425fde321 |
| parent 6: | c599f2be6093 |
| branch: | default |
When in emulation mode, bits 4 and 5 should always be read as 1.
kc5...@localhost.localdomain
6 months ago
Changed (Δ67 bytes):
raw changeset »
src/opcodes.h (9 lines added, 5 lines removed)
Up to file-list src/opcodes.h:
| … | … | @@ -54,7 +54,7 @@ BEGIN_CPU_FUNC(opcode_0x00) /* BRK s |
54 |
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#else |
55 |
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S_PUSH(PC.B.H); |
56 |
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S_PUSH(PC.B.L); |
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S_PUSH(P | 0x |
|
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S_PUSH(P | 0x30); |
|
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F_setD(0); |
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F_setI(1); |
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F_setB(0); |
| … | … | @@ -85,7 +85,7 @@ BEGIN_CPU_FUNC(opcode_0x02) /* COP s |
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#else |
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S_PUSH(PC.B.H); |
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S_PUSH(PC.B.L); |
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S_PUSH((byte) ( |
|
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S_PUSH((byte) ((P & ~0x10) | 0x20)); |
|
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F_setD(0); |
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F_setI(1); |
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DB = 0; |
| … | … | @@ -121,7 +121,11 @@ BEGIN_CPU_FUNC(opcode_0x07) |
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END_CPU_FUNC |
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|
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BEGIN_CPU_FUNC(opcode_0x08) |
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#ifdef NATIVE_MODE |
|
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S_PUSH(P); /* PHP s */ |
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#else |
|
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S_PUSH((P & ~0x10) | 0x20); |
|
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#endif |
|
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END_CPU_FUNC |
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|
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BEGIN_CPU_FUNC(opcode_0x09) |
| … | … | @@ -1637,7 +1641,7 @@ BEGIN_CPU_FUNC(abort) |
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#else |
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S_PUSH(PC.B.H); |
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S_PUSH(PC.B.L); |
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S_PUSH((byte) ( |
|
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S_PUSH((byte) ((P & ~0x10) | 0x20)); |
|
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F_setD(0); |
1642 |
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F_setI(1); |
1643 |
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DB = 0; |
| … | … | @@ -1665,7 +1669,7 @@ BEGIN_CPU_FUNC(nmi) |
1665 |
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#else |
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S_PUSH(PC.B.H); |
1667 |
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S_PUSH(PC.B.L); |
1668 |
S_PUSH((byte) ( |
|
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S_PUSH((byte) ((P & ~0x10) | 0x20)); |
|
1669 |
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F_setD(0); |
1670 |
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F_setI(1); |
1671 |
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DB = 0; |
| … | … | @@ -1693,7 +1697,7 @@ BEGIN_CPU_FUNC(irq) |
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#else |
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S_PUSH(PC.B.H); |
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S_PUSH(PC.B.L); |
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S_PUSH((byte) ( |
|
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S_PUSH((byte) ((P & ~0x10) | 0x20)); |
|
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F_setD(0); |
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F_setI(1); |
1699 |
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F_setB(1); |