| ADR | HEXADR | NAME | Description | OS |
|---|---|---|---|---|
| 58460 | $E45C | SETVBV | Set system timers and interrupt vectors | both |
Sets an interrupt vector or system timer vector.
Usage:#
Assembler
LDX MSB LDY LSB LDA (value see table below) JSR $E45CAction!
PROC SETVBV=*$E45C(BYTE VECTOR,MSB,LSB) RETURN
| Register | Value |
|---|---|
| X | MSB |
| Y | LSB |
| A | vector to be changed, see below |
| Value | Vector |
|---|---|
| 0 | VIMIRQ |
| 1 | TIMCOUNT1 |
| 2 | TIMCOUNT2 |
| 3 | TIMCOUNT3 |
| 4 | TIMCOUNT4 |
| 5 | TIMCOUNT5 |
| 6 | VVBLKI |
| 7 | VVBLKD |
see also: VBI Vertical Blank Interrupt
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Voice and Data Cassettes
Atari Program Exchange (APX)
Atari Learning System Software
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Official country specific Atari software
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Rarity 10
Statistics
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