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76 lines
2.1 KiB
Plaintext
76 lines
2.1 KiB
Plaintext
/*********************************************************
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* vector - 6502 Interrupt Vector Manipulation Functions *
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*********************************************************/
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/* Get BRK Handler Address *
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* Returns: Status *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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* Address MSB *
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* Address LSB */
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char getbrk();
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/* Get IRQ Handler Address *
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* Returns: Status *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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* Address MSB *
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* Address LSB */
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char getirq();
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/* Get NMI Handler Address *
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* Returns: Status *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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* Address MSB *
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* Address LSB */
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char getnmi();
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/* Get RESET Handler Address *
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* Returns: Status *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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* Address MSB *
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* Address LSB */
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char getrst();
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/* Set BRK Handler Address */
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* Args: &d - New Address *
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* Returns: Result *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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char setbrk();
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/* Set IRQ Handler Address */
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* Args: &d - New Address *
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* Returns: Result *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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char setirq();
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/* Set NMI Handler Address */
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* Args: &d - New Address *
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* Returns: Result *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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char setnmi();
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/* Set RESET Handler Address */
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* Args: &d - New Address *
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* Returns: Result *
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* $00 = modifiable *
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* $7F = hard coded *
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* $FF = unavailable *
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char setrst();
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/* Exit from IRQ Interrupt */
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xitirq:
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