izaya/collapseos
1
0
Fork 0
mirror of https://github.com/hsoft/collapseos.git synced 2024-12-25 05:28:06 +11:00
Code Issues Releases Wiki Activity

zasm: document lack of support for undocumented instructions

Browse Source
This commit is contained in:
Virgil Dupras 2019-10-17 15:52:59 -04:00
parent f41ccdbc81
commit f806786bd3
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
apps/zasm/README.md
View File

@ -152,4 +152,11 @@ allowed. An included file cannot have an `.inc` directive.
in the argument in the currently active filesystem and outputs its
contents directly.
## Undocumented instructions
`zasm` doesn't support undocumented instructions such as the ones that involve
using `IX` and `IY` as 8-bit registers. We used to support them, but because
this makes our code incompatible with Z80-compatible CPUs such as the Z180, we
prefer to avoid these in our code.
[libz80]: https://github.com/ggambetta/libz80