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Started by Amagni, 02:56, 04 September 23
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Quote from: Rabs on 20:03, 04 September 23Also I guess you don't know if the main board has a problem or not. I repaired one 6128, which like yours was working in every way, except it would not read disks (even with a known working disk drive). In the end I found that IC203 (74HC240) was faulty. I guess as this IC is edge connector facing it is susceptible to failure (but that is a guess).
Quote from: Amagni on 04:00, 05 September 23Quote from: Rabs on 20:03, 04 September 23Also I guess you don't know if the main board has a problem or not. I repaired one 6128, which like yours was working in every way, except it would not read disks (even with a known working disk drive). In the end I found that IC203 (74HC240) was faulty. I guess as this IC is edge connector facing it is susceptible to failure (but that is a guess).Ok, that's a pretty cheap chip so I guess I may as well replace it. I've tried every combination of jumpers I could think of and nothing is working so far.I'm just not German enough for this level of hardware diagnostics!
Quote from: Rabs on 06:12, 05 September 23What does INP(&FB7E) return? You should get &80 which is the FDC Status. If you get &80 then probably not IC203,
Quote from: Audronic on 05:14, 05 September 23If you put back the 3 Inch drive .Can you Borrow a 3 Inch disk from somebody in Sydney to prove that the Floppy disk controller works ?
Quote from: Amagni on 02:44, 06 September 23Ok, I tried it with the original drive, turns out the drive belt is completely gone, but the motor does spin up when I try to read the disc.Still says "disc missing" whether or not a disc is in there.If I keep pressing Ignore it reports some huge nonsense file (see pic) I'm going to replace that chip as I can't think of anything else to do at this point.
Quote from: Amagni on 12:00, 06 September 23I've ordered a new drive belt, but I'm still not sure what to do about the gotek.What are the odds it would work better if I used the external floppy connector on the back of the computer?
Quote from: eto on 12:01, 19 September 23Did you try to change the jumper orientation on the adapter?
Quote from: Amagni on 03:36, 20 September 23Yeah I've tried all the jumper changes I could think of, to no avail.I even wondered if I'd put the ribbon cable the wrong way round so I flipped it over and the gotek actually said "ribbon cable is upside down" so I know it wasn't that!
Quote from: Amagni on 05:01, 19 September 23Now I just have to work out what to do with the Gotek, I think I'll try getting an external drive cable and see if that works any better.
Quote from: pelrun on 02:21, 23 September 23> The problem is that the "Ready" line needs to be correctly connected and old goteks do not have them. The newer ones, that are based on the Artery AT32F435 chip, can be programmed to fully correctly emulate the Ready line.As far as I'm aware, this is not true. It might be a limitation of FF specifically (I run HXC), but it's definitely not a hardware issue.
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