RetroSweden
Experienced Member
- Joined
- Jan 15, 2014
- Messages
- 59
Hi VC!
I have a SFD-1001 drive that's been in a broken state for too long, so today i started troubleshooting it. The original problem was that it flashed six times at startup. I found some info online saying that six flashes either meant that the 6530 or one of the 6502's that was broken.
The 6530 is on a break-out board together with a 2716 eprom (which i read came from commodore re-using old stocks of 6530's with the wrong data burned into the ROM part of the 6530).
Rumors online says that the 6530 often is faulty on the SFD-1001, so i started there. In with a replacement 6530 and.. six flashes.
I downloaded the floppy disk controller ROM from zimmers.net, dumped the 2716 EPROM and compared the bin files. Equal match.
Switched the two 6502's around and.. constant red light from the LED. We're onto something here...
I replaced one of the 6502's and the drive gave me a green light.
The trouble now is that when i format a disk, i can hear the drive step ~20 times, and then it starts to click, and the drive keeps spinning for a while and then stops. When i read ds$ i get 20,read error,97,18,00. (i assume the numbers mean something here, and may give someone who knows things about stuff a clue)
So this is where i'm stuck. Any help appreciated.
//RS
I have a SFD-1001 drive that's been in a broken state for too long, so today i started troubleshooting it. The original problem was that it flashed six times at startup. I found some info online saying that six flashes either meant that the 6530 or one of the 6502's that was broken.
The 6530 is on a break-out board together with a 2716 eprom (which i read came from commodore re-using old stocks of 6530's with the wrong data burned into the ROM part of the 6530).
Rumors online says that the 6530 often is faulty on the SFD-1001, so i started there. In with a replacement 6530 and.. six flashes.
I downloaded the floppy disk controller ROM from zimmers.net, dumped the 2716 EPROM and compared the bin files. Equal match.
Switched the two 6502's around and.. constant red light from the LED. We're onto something here...
I replaced one of the 6502's and the drive gave me a green light.
The trouble now is that when i format a disk, i can hear the drive step ~20 times, and then it starts to click, and the drive keeps spinning for a while and then stops. When i read ds$ i get 20,read error,97,18,00. (i assume the numbers mean something here, and may give someone who knows things about stuff a clue)
So this is where i'm stuck. Any help appreciated.
//RS