12/15/2023 0 Comments Dos formatted floppy disks new![]() ![]() two second wait, the loop terminates and returns a general error which is returned by the floppy handler as CF=1, AH=80h, ' Drive timed out, assumed not ready'. If there is no FD interrupt within the ca. Good or bad, either way (CF=0 if good, or CF=1 when bad). When the interrupt occures, the interrupt routine sets the flag, which again breaks the wait loop. The only interrupts possible here hit when the drive has found the desired track (or track 0). ![]() In the Format window, check Create an MS-DOS startup disk. Open My Computer, right-click the A: drive and click Format. Whenever a Seek or Recalibrate/Reset is issued, the 8088 goes into an active wait loop, looking for a flag which is set whenever a disk interrupt occures. When formatting a floppy diskette, users have the option of creating an MS-DOS startup disk, follow the steps below to do this. This is usually done by the vendor, but formatting is a good way to check media integrity. My bet would be on a missing track 0 signal. A floppy disk needs to be low-level formatted before it can be used. So I say the FDC doesn't return from whatever command (usually Seek) is issued. The one exception involves the 720K, 5.25 inch format. ![]() The term 'IBM formatted' also applied to 3.5' disks. DOS and Windows operating systems can recognise a Floppy Disks format and will read from, and write to, almost any disk format. INT 13h timeout ( 80h) occures whenever the 'Wait for Interrupt' BOIS routine doesn't detect an interrupt within 2 seconds. 1 IBM Formatted MS-DOS Windows FAT12/FAT16 Giacomo1968 at 4:13 1 DanielRHicks : Not just the 5.25' disks. ( Caveat: The following information is strictly only true for the XT BIOS, not 100% sure about the XT286, but I'd say it is as compatible here as the AT is) Conclusion from above messages: ![]()
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