Int 2F/AH=05h

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DOS 3.0+ CRITICAL ERROR HANDLER - EXPAND ERROR INTO STRING

AH = 05h
---DOS 3.x---
AL = extended error code (not zero)
---DOS 4.0+ ---
AL = error type
01h DOS extended error code
02h parameter error
BX = error code

Return:
CF clear if successful ES:DI -> ASCIZ error message (read-only) AL = completion state 00h message requires completion with device name, drive, etc. 01h message is complete as returned CF set if error code can't be converted to string AX,DI,ES destroyed other flags corrupted

Notes: Called at start of COMMAND.COM's default critical error handler if installed by a user program, allowing partial or complete overriding of the default error messages. Subfunction 02h is called by many DOS 4 external programs. DR DOS's COMMAND.COM appends additional info ("0 files copied") to the returned string

See Also: AX=0500h - AX=122Eh - INT 24

Category: Shells/Command Interpreters - Int 2Fh - D

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