![]() ![]() 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. Step 2: Click on the Start button, then click on run. Floppy disk drive and media manufacturers specify the unformatted capacity (for example, 2 MB for a standard 3 + 1 2-inch HD floppy). Step 1: Insert the floppy you would like to erase into the floppy drive of your computer. The only interrupts possible here hit when the drive has found the desired track (or track 0). The unformatted capacity of a floppy disk does not include the sector and track headings of a formatted disk the difference in storage between them depends on the drive's application. To create a partition or volume (the two terms are often used interchangeably) on a hard disk, you must be logged in as an administrator, and there must be either unallocated disk space or free space within an extended partition on the hard disk. 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. My bet would be on a missing track 0 signal. ![]() So I say the FDC doesn't return from whatever command (usually Seek) is issued. INT 13h timeout ( 80h) occures whenever the 'Wait for Interrupt' BOIS routine doesn't detect an interrupt within 2 seconds. Hard disk drives prior to the 1990s typically had a separate disk controller. Low-level formatting (LLF) of hard disks. The low-level format of floppy disks (and early hard disks) is performed by the. The DMF (1. ( 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: Disk formatting process Low-level formatting of floppy disks. If you cover up the hole that cant be closed normally with some tape (the one missing on 720k floppies), you should be able to format the disk even under win. MaxFormat can format floppies to the current standard formats for 3.5 inch disks of 1.4MB and 720K, 5.25 inch disks of 1.2MB and 360K, plus additional non-standard formats: 1.72MB and 1.68MB DMF (3.5 inch disks) and 1.5MB (5.25 inch disks). ![]()
0 Comments
Leave a Reply. |