- It must be 30 pin SIMMs.
- Capacity either 256Kb or 1Mb.
- Speed 120ns or faster.
- All SIMMs must be the same *size*.
Manufacturer doesn't matter, 2, 3, 8 or 9 chips doesn't matter, parity doesn't matter. No problem in having four completely different SIMMs as long as the four requirements above are met. Oh, and the SIMMs must be in working order. That's not always the case today with 25+ years old components.
Greenious wrote:In short, my STEs has worked with just about every (working) 256kb/1mb simm I've thrown at them.
This sums it up nicely
athensnet wrote:I have tried also with 4 simms of 256 K to make it 1 MB but still the same problem.
I think we can rule out the SIMMs, there is most likely a problem with the STE. Time to dig out the schematics and multimeter I guess. I would start with the SIMM sockets and check continuity from there. If all the lines checks out (and the sockets themselves are undamaged) I would suspect the MMU/GLUE (combined in a single chip in the STE) or shifter next.
Edit: Running YARTT in manual mode as adviced above would problably give some hints to where the problem is.