INT 21 - pcANYWHERE IV/LAN - INSTALLATION CHECK
AX = 2B44h ('D')
BX = 4D41h ('MA')
CX = 7063h ('pc')
DX = 4157h ('AW')
Return: AX = resident program
4F4Bh ('OK') if large host resident
6F6Bh ('ok') if small host resident
CX:DX -> API entry point (see #01389)
SeeAlso: INT 16/AH=79h