Recent content by CygnusTM

It never occurred to me to try that. I probably could have saved myself some trouble. Oh well. Good learning experience anyway.

Greetings 68kMLA! I wanted to share the RaSCSI case I modeled. I had been looking for a case for the RaSCSI I've been using with my Mac IIsi. The case by @PotatoFi is awesome, but wouldn't work for me since I had mounted the Pi on the bottom to allow for the use of the optional OLED screen...

The switch is now the prime suspect. I didn't have time to take it apart and investigate the switch, but I did have time to start it up and lock the switch in "server" position. It ran all day without spontaneously shutting off. When I get a chance I'm going to see if I can get some DeoxIT in...

Yes, I did, and it has a Sony power supply. I guess I should focus my investigation there?

Since buying this IIsi, I replaced the PRAM battery, upgraded the RAM (from 5MB to 17 MB) and recapped the PS and the system board. Before and after these modifications, it will randomly power itself on if left plugged in, and it will randomly power itself off while trying to use it. Sometimes...

So after examining the SIMMs more closely and searching part numbers on the PCB, I found that these aren't the Samsung parts stated in the listing. They are actually Siemens parts that I can't find much info on. So they are getting returned. I bought another set that specifically says they work...

Yeah, that was one of the pages I used when I was researching. These are FPM chips with better than 100 ns speed, so I thought they would work. I did find one page (https://oldcrap.org/2018/11/25/macintosh-iisi/) that seems to show a IIsi with 3-chip SIMMs.

I recently picked up a IIsi. It came with 5MB of RAM (4 1MB SIMMs installed), and I am trying to upgrade to 17MB. I picked up 4 4MB SIMMs on eBay (https://www.ebay.com/itm/224577279767), and the IIsi won't see the SIMMs at all. I've tried reseating it and a PRAM reset. How picky is the IIsi...