Apple-2-SW/prodos-path
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This commit is contained in:
Joshua Bell 2024-11-07 20:15:37 -08:00
parent b63dabb7cd
commit 434c8689a0
1 changed files with 5 additions and 3 deletions
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README.md
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@ -25,8 +25,8 @@ cmdname - load and execute named CMD, if in PATH
Example:
```
] -/hd/cmd/path - install it
] PATH /hd/cmd:/h2/bin - set PATH
] PATH - verify path
] PATH /hd/cmd:/h2/bin - set search path with two directories
] PATH - verify search path
/hd/cmd:/h2/bin
] BELL - will invoke /hd/cmd/BELL if present
] HELLO - will invoke /hd/cmd/HELLO if present
@ -75,7 +75,9 @@ Behavior of `PATH`:
Protocol for `CMD` files:
* CMD file is loaded at $4000 and invoked; should return (`rts`) on completion.
* CMD file is loaded at $4000 and invoked.
* $4000-$5FFF is assumed reserved for the CMD file and any buffers it needs.
* The command line will be present at $200 (`GETLN` input buffer).
* Commands can use the BI parser for arguments. See `chtype.cmd.s` for an example.
* Exit with `CLC` then `RTS` to return to the ProDOS BASIC prompt.
* To signal an error, `LDA` with a BI error code, then `SEC` and `RTS`.