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Z80: LDH instruction for LR35902

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Karol Stasiak
2018-08-03 16:43:31 +02:00
parent f4a2c96512
commit 48b183828b
6 changed files with 60 additions and 6 deletions
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docs/lang/assemblyz80.md
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@@ -12,15 +12,13 @@ There are two ways to include raw assembly code in your Millfork programs:
Millfork uses Zilog syntax for Intel 8080, Z80 and LR35902 assembly.
**Work in progress**:
Intel syntax is not supported yet.
LR35902 instructions for faster access to the $FFxx addresses are not available yet.
Indexing via the IX/IY register uses the following syntax: `IX(1)`
LR35902 instructions that load/store the accumulator indirectly via HL and then increment/decrement HL are written
`LD A,(HLI)`, `LD, A,(HLD)`, `LD (HLI),A` and `LD (HLD),A`
LR35902 instructions for faster access to the $FFxx addresses use the `LDH` mnemonic: `LDH A,(4)`, `LDH (C),A` etc.
Only instructions available on the current CPU architecture are available.
Undocumented instructions are not supported, except for `SLL`.