4 lines
302 B
Plaintext
4 lines
302 B
Plaintext
TYA + PHA + TSX + LDA $0104,X + AND #$10
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Beginning of IRQ handler - checks whether it is caused by BRK instruction or some other reason. Since IRQ handling for BRK/non-BRK caused interrupts are totally different, there is no other way but to start with such a check. Not creative - not copyrightable.
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