Gregory's Serverweirdly enough, it booted to the setup disk just fine, but during automatic configuration, the screen goes blank and the whole thing locks up. from then on, any cold power cycle results in the error code 0F! i've pulled the battery again to clear whatever was loaded in there.
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 it runs now. i get a 201 error and a 164 error on boot. hmm, memory error and memory size error. looks like I need to get my system unit serviced. error 10400 is pretty generic. my guess is that it is the system board memory that has gone bad. funny coincidence, i'm designing a memory tester right now! however, i hadn't thought about putting in sockets for these little guys. can you even *get* sockets?  @tubetime What kind of packaging is that? I’ve never seen anything like it. @foobarsoft IBM's crazy odd MST modules (later versions of their SLT modules that they invented in the 1960s) @tubetime Because of my unique personal history, my first thought was "I wonder if those were made in Burlington" (which was actually Essex Junction). @wollman see where it says "IBM 14" in the middle? the number there indicates the factory it was made in. apparently the code 29 indicated Essex, so this was a different factory. (see https://www.righto.com/2021/01/) https://www.twitch.tv/tubetimeus let's do some more board layout -- this time, i'm cloning an IBM PS/2 model 80 memory card (gee i wonder why) some folks are wondering what those metal cans are in the other post. here's a handy reference chart from IBM that shows modules with the lids removed.  @tubetime Yet Another Weird IBM Package I guess. All part of its early days vertical integration and vendor lock in strategy? @EricCarroll IBM MST. based on an earlier tech they called SLT (solid logic technology) that they developed in the '60s. @tubetime I thought it looked like the SLT package from the IBM 1130 & 370 I had my hands on at one time. Never seen MST before. Thanks!  |
OK i let it sit and then rewrote a new reference disk. perhaps it detected the type 2 planar and screwed something up in the type 1 planar's CMOS?