noodlepringle
Member
I have an LC575 board that I sent to the great Bruce Rayne here in Australia to repair for me that suddenly died in the Colour Classic I had it in.
After a fair amount of troubleshooting he's let me know that it's the cuda/egret chip that's at fault and that he doesn't have a spare board to pull it from. The rest of the board is nice and clean and was running super well before this happened.
So I'm on the hunt for one. Does anybody have an LC575 board that's dead in some other way that I could buy to harvest the Cuda/Egret chip from? Does anybody know if cuda/egret chips between similar boards can be swapped? Or does it need to be only from an LC575?
I'd be so grateful for any help here - it was really getting into coding some software using the Retro68 build chain to build an interface with various microcontrollers I have doing things around the house (my style of smart home = chitty chitty bang bang meets 21st century) - it was a hoot! (plus monkey island 2 runs terribly on a standard colour classic mainboard)
Bit of backstory of how this happened:
I had a Colour Classic that I'd used on and off for years, but of course the board that came with them was anemic and hard to do much with (so little ram! such a slow processor even for its time!). Out of the blue one day a local guy was selling an LC575 that looked like it had been dropped and wasn't running, but the board was unharmed, so I bought it and slipped it into the mac and off I went.
This LC575 board was running well for bit more than 6 months I think when I decided to order one of the SCSI2SD boards (I think it was a v5.5 that sources power from the SCSI port to run, no other cables needed). I plugged it in, but had problems getting it recognised, so I used a utility and a boot disk to scan the scsi bus. It briefly saw the drive, then the system locked up hard frozen, cursor wouldn't move.
When I rebooted, I got the chime, but no screen, no hard drive activity no matter what.
I know that this Colour Classic needed an analog board recap at some point soon, but it wasn't so bad yet, just a slight distortion in the CRT image, and I'd checked the analog board for anything super obvious like bulging/leaking caps. The recap was going to be next on the list.
I wonder if maybe the added weight of power requirement for the SCSI2SD caused it to become overwhelmed and find a way to kill the cuda/egret chip? I'm just not familiar enough with the hardware to know why this would have happened.
So my understanding is that this chip handles the POST and is the intermediary with ADB and SCSI etc too, and that's why the chime, but nothing beyond that.
After a fair amount of troubleshooting he's let me know that it's the cuda/egret chip that's at fault and that he doesn't have a spare board to pull it from. The rest of the board is nice and clean and was running super well before this happened.
So I'm on the hunt for one. Does anybody have an LC575 board that's dead in some other way that I could buy to harvest the Cuda/Egret chip from? Does anybody know if cuda/egret chips between similar boards can be swapped? Or does it need to be only from an LC575?
I'd be so grateful for any help here - it was really getting into coding some software using the Retro68 build chain to build an interface with various microcontrollers I have doing things around the house (my style of smart home = chitty chitty bang bang meets 21st century) - it was a hoot! (plus monkey island 2 runs terribly on a standard colour classic mainboard)
Bit of backstory of how this happened:
I had a Colour Classic that I'd used on and off for years, but of course the board that came with them was anemic and hard to do much with (so little ram! such a slow processor even for its time!). Out of the blue one day a local guy was selling an LC575 that looked like it had been dropped and wasn't running, but the board was unharmed, so I bought it and slipped it into the mac and off I went.
This LC575 board was running well for bit more than 6 months I think when I decided to order one of the SCSI2SD boards (I think it was a v5.5 that sources power from the SCSI port to run, no other cables needed). I plugged it in, but had problems getting it recognised, so I used a utility and a boot disk to scan the scsi bus. It briefly saw the drive, then the system locked up hard frozen, cursor wouldn't move.
When I rebooted, I got the chime, but no screen, no hard drive activity no matter what.
I know that this Colour Classic needed an analog board recap at some point soon, but it wasn't so bad yet, just a slight distortion in the CRT image, and I'd checked the analog board for anything super obvious like bulging/leaking caps. The recap was going to be next on the list.
I wonder if maybe the added weight of power requirement for the SCSI2SD caused it to become overwhelmed and find a way to kill the cuda/egret chip? I'm just not familiar enough with the hardware to know why this would have happened.
So my understanding is that this chip handles the POST and is the intermediary with ADB and SCSI etc too, and that's why the chime, but nothing beyond that.