Int 21/AX=69FFh/DX=0000h

CUBIT v4.00 - GET CUBIT INT 21 HANDLER

AX = 69FFh
DX = 0000h
BX = CB00h (magic value)

Return:
ES:BX -> CUBITR.EXE handler for INT 21
InstallCheck:
Test that the first eight bytes at the returned interrupt
handler are EBh 07h "CUBITR" (a short jump around the signature
followed by the signature)

Note: The byte following the signature (i.e. ES:[BX+8]) indicates whether CUBITR is active (01h) or disabled (00h)

See Also: AX=69FFh/DX=CFBFh

Index:
Installation check;CUBIT

Category: Disk I/O Enhancements - Int 21h - C

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