path - CMD executable path command for ProDOS's BASIC.SYSTEM

Build with ca65

Installation:

• Copy target to ProDOS disk
• From BASIC.SYSTEM prompt, run: -PATH from STARTUP (or by hand)

Usage:

PATH            - view current search path
PATH prefix     - set search path

Once set, binary files of type CMD in the specified directory can be invoked by name.

• CMD file is loaded at $4000 and invoked; should return (rts) on with carry clear completion
• The command line will be present at $200 (GETLN input buffer).

Example:

] -/hd/path              - install it
] PATH /hd/cmds          - set PATH
] PATH                   - verify path
/hd/cmds
] BELL                   - will invoke /hd/cmds/BELL if present
] HELLO                  - will invoke /hd/cmds/HELLO if present

Notes:

• Allocates a buffer to store the code and path
• Can be invoked as lower case (e.g. path ...)
• Applesoft BASIC commands are unaffected (but can't be CMD names)

Future:

• Support multi-segment paths (e.g. /hd/cmds:/hd2/more.cmds)