INT 21 - IBM SYSTEM 36/38 WORKSTATION EMULATION - VDI.SYS - GET ??? AX = 4402h BX = handle for character device "GDMS" CX = number of bytes to read (>= 4) DS:DX -> buffer (see #01445) Return: CF set on error AX = error code (see #01680 at AH=59h/BX=0000h) CF clear if successful AX = number of bytes read