Instruction | Bits 5 and 4 | Side effects after pushing |
---|---|---|
PHP | 11 | None |
BRK | 11 | I is set to 1 |
/IRQ | 10 | I is set to 1 |
/NMI | 10 | I is set to 1 |
CYC1992:
- 注意stack的起始地址是0x100,但是sp
$\in$ [0x00, 0xff].
CYC2029:
- 注意push下一条指令地址 -1
由于python糟糕的效率,决定切回c++版本.