Technical information about the IBM 5100 computer can be found on the web, but decent pictures are rare. In January 2000 I rescued one from being thrown out (for the time being). Before stashing it in my parents' attic, I took some pictures.
The tape drive may still work in mine, but the tapes that I have are no longer readable.
The guts: Swing-out backplane with cards. Quite a few slots are empty in this one, because it only has the BASIC ROMs and only 16K of RAM. A fully configured machine would have switchable BASIC or APL, and 64K of RAM, and possibly some I/O modules.
As often the case in stuff this old, the foam has deteriorated into a sticky mess.
The machine works, but with all the strange, extinct IBM technology inside (what's the use of having the service manual if all the spare parts, as well as the diagnostic tape, are extinct?) one shouldn't get too attached to it. One of my other "museum piece" machines (the NABU) is no longer functional since its 20-year-old hard disk controller gave up the ghost.
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