Xref: utzoo comp.sys.ibm.pc:18056 comp.misc:3095 Path: utzoo!utgpu!attcan!uunet!peregrine!elroy!ames!amdahl!pyramid!ctnews!starfish!cdold From: cdold@starfish.Convergent.COM (Clarence Dold) Newsgroups: comp.sys.ibm.pc,comp.misc Subject: Re: Need program to show available drives Message-ID: <632@starfish.Convergent.COM> Date: 12 Aug 88 18:24:20 GMT References: <6232@pyr.gatech.EDU> Distribution: na Organization: Convergent Technologies, San Jose, CA Lines: 31 From article <6232@pyr.gatech.EDU>, by ccastsc@pyr.gatech.EDU (KEITH SCHAMIS): > I need a program that runs on a ps/2 that can be called from a C program and will return the values of the drives available on the machine. Is there an interrupt available that tells me that a drive is unavailable when I try to access it? AT (PC?) BIOS: INT 13H, AH = 08H - Get Current Drive Parameters Input: AH = 08h DL = Drive Select: 00h Drive A 01h Drive B 80h Drive C 81h Drive D Return: AX = 0 BH = 0 BL = Drive Type from CMOS RAM CH = Bits 0 to 7 of maximum number of cylinders CL = Bits 7 and 6 are bits 9 and 8 of maximum cylinder number Bits 5-0 are maximum number of sectors per track DH = Maximum number of heads DL = Number of drives ES:DI = DPB address INT 13, AH = 10H - Test Drive Ready Input: AH = 10h DL = Drive Select Return: AH = 00h Drive is ready CF = 00h Succesful completion 01h AH contains error code In Microsoft C, int86() will give access to BIOS INTs.