Addresses
The addresses used ny the Z80
The Z80 uses a fixed set of addresses in Page 0 of the address space:
| Address | Instruction | Usage | ||||||
|---|---|---|---|---|---|---|---|---|
| 0000 | RST 0 | Initial power on | ||||||
RST 0 instruction is invoked. |
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| RESET pin is held low | ||||||||
| 0008 | RST 1 |
RST 1 instruction is invoked.
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| 0010 | RST 2 |
RST 2 instruction is invoked.
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| 0018 | RST 3 |
RST 3 instruction is invoked.
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| 0020 | RST 4 |
RST 4 instruction is invoked.
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| 0028 | RST 5 |
RST 5 instruction is invoked.
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| 0030 | RST 6 |
RST 6 instruction is invoked.
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| 0038 | RST 7 | RST 7 instruction is invoked. |
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| INT Maskable Interrupt handler when in Interrupt Mode 1 | ||||||||
| 0066 | NMI interrupt handler | |||||||
Addresses 0x0000…0x003F are used by the 8 RST instructions with 8 bytes available for each.
RST 0 is also the start address for when the processor powers on or is reset.
Last modified November 11, 2021: Reformat (d656f9a)