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Abit IP35 Motherboard

G

GianDO76

Member
Joined
Oct 30, 2023
Messages
35
Hi,
I have an Abit IP35. This motherboard supports two floppy drives which I have installed and see on Windows. Floppy drive A works normally, while if I insert a floppy disk into floppy drive B and try to read it, Windows shows me a popup "insert a floppy into drive B", but the floppy is present and the LED on the drive does not light up . With the floppy drive there are no problems because if I put B in place of A and A in place of B I have the same problem, that is, floppy B which was previously A has the same problem as floppy A when it was B. I would like to understand how to solve it.

Thank you
G
 
I'm assuming that these are "modern"-ish floppy drives, currently hardwired to the second drive select.
Try using Imagedisk to select each drive. See if the behavior persists.
 
VeryVon said:
Looks good. Do you have another cable you can test with? Trying to rule out an issue with the cable...
Click to expand...
I have already done a test with another cable, the result does not change. However it works on another motherboard, the problem is on the Abit.
 
Chuck(G) said:
I'm assuming that these are "modern"-ish floppy drives, currently hardwired to the second drive select.
Try using Imagedisk to select each drive. See if the behavior persists.
Click to expand...
The motherboard is also a "modern" -ish motherboard. I don't think the problem will be solved with ImageDisk (I'll try anyway).
I also enabled the "Boot Up Floppy Seek" feature in the BIOS to detect the floppy at boot. Floppy A is detected regularly with the classic "noise", while Floppy B is not detected and "Floppy Disk(s) fail (40)" appears on the POST screen.
 
Chuck(G) said:
ImageDisk doesn't use the BIOS, but goes directly to hardware. A good test to see if it's your hardware or your BIOS.
Click to expand...
I restarted the computer in DOS mode from drive A, then I launched ImageDisk, but immediately after without me doing anything it gives me a reading error in drive A and the floppy disk seems corrupt.
 
Chuck(G) said:
What function were you attempting? IMD doesn't write anything when it starts up. Maybe you had a bad floppy?
Click to expand...
In Windows XP I created a bootable DOS formatted diskette where I copied the IMD119 folder containing DiskImage. I start the computer from the newly created floppy disk in DOS mode and launch IMD.COM. What you see in the photo appears. Any key I press A, R, I, F, the error repeats.


ImageDisk.jpg
 
You've got some issues there. Right now, my suspicion is that the board supports only a single floppy--yes, I've read the manual. If you want to pursue this and have a logic probe or oscilloscope, I suppose we can confirm this. It's be somewhat unusual for a Socket 775 board to support 2 floppies. What's the SuperIO chip part number?
 
Chuck(G) said:
You've got some issues there. Right now, my suspicion is that the board supports only a single floppy--yes, I've read the manual. If you want to pursue this and have a logic probe or oscilloscope, I suppose we can confirm this. It's be somewhat unusual for a Socket 775 board to support 2 floppies. What's the SuperIO chip part number?
Click to expand...
Do you think it doesn't support double floppy drive? So why does the BIOS let you configure the second drive too? Even in the manual it says that it supports up to two floppies. The chip is this one in the photo.


SuperIO.jpg
 
See datasheet here. Go to PDF page 140. Under section 10.2.3, note that the only drive select is A:,as well as the "Motor Enable". All other bits are "reserved".

IOW, you have a one-floppy motherboard. Abit likely just re-purposed the docs and the BIOS. Datasheets, however, rarely lie.

You're welcome.
 
Chuck(G) said:
See datasheet here. Go to PDF page 140. Under section 10.2.3, note that the only drive select is A:,as well as the "Motor Enable". All other bits are "reserved".

IOW, you have a one-floppy motherboard. Abit likely just re-purposed the docs and the BIOS. Datasheets, however, rarely lie.

You're welcome.
Click to expand...

Ok, I saw the technical data sheet. So the BIOS and the manual are false. I thought Abit was a more serious company.
I'll say something absurd: can't the chip be reprogrammed?
 
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