Function 44h I/O Control for Devices (IOCTL) Get or Set Device Informationentry AH 44h
AL 0Eh Get Logical Device (DOS 3.3+)
BL drive number (0=default)
return AL=0 block device has only one logical drive
assigned 1..n the last letter used to reference
the device (1=A:,etc)
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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