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AH = 18h
CX = D2C9h ("R"+80h, "I"+80h = Roger Ivey)
DX = 0000h
BX = function
0000h installation check
Return:
AH = 0Ch
CX = 7269h ("ri" = Roger Ivey)
ES = segment of driver
CF set
2F64h ("/d") disable the driver
Return:
AH = 0Ch
ES:BX = pointer to activation flag (it is set to 0:
set it to 1 to enable the driver again)
CX = 7269h
CF set
2F75h ("/u") unload the driver (restore interrupts & free memory)
Return:
AH = 0Ch
DL = 55h ("U") if successful
= 00h if fails
CX = 7269h
ES = segment of driver
CF set
AL, BX, DH, and DI destroyed
Program: XDF is a TSR provided with PC-DOS 7.0 to support XDF 1.84M disks, developed by Roger D. Ivey
Note: After disabling or enabling the driver, a disk change must be performed or simulated to reset the driver.
Category: Disk I/O Enhancements - Int 13h - X
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