The Prophet 3000 memory upgrade will need some more R&D. It’s passing some tests and failing others. I’m not sure yet if it’s an issue with my board or the P3000, but it seems like the additional DRAM chips need to be buffered similarly to the original DRAM chips. Have to dig out the logic analyzer and see what’s going on.
I’ve completed another batch of DSS-1 upgrade boards, but they tend to go pretty quick, so let me know if you’re interested. Also, I’ve just received another 30 boards for the ASR-10 SCSI upgrade. I’m now looking into having them assembled by another company. The reason for this is twofold. First, having the boards assembled on an assembly line is more reliable than hand soldering. Second, I currently only have 2-3 hours a week to do any sort of PCB assembly. Each SP-3 board, for example, takes almost 2 hours to assemble start to finish.
I’ve also had a couple of requests for the SP-4 SCSI board for the TS-10 and TS-12. If I have enough requests (more than 10) I’ll look into making those too.
any news on this upgrade Jim?
No progress lately. Been busy with other projects. It may be that I have some bad DRAM chips, I’m going to build another board with a different vendor’s chips and see what happens.