Mystery Ancient HP Memory Modules - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: Mystery Ancient HP Memory Modules (/thread-53093.html) |
Mystery Ancient HP Memory Modules - Alex - 03-04-2004 I have some HP memory modules, marked 1818-2805, with a big number 5 on them, and saying Hewlett-Packard, these look like 1970s or so, ceramic chip packages with a plastic holder around them, anyone know anything?
Re: Mystery Ancient HP Memory Modules - Achim - 03-06-2004 Is the plastic holder roughly of the size 2.5"x4.5"x0.75" ? Then it's propably a ROM module for a 9810 or 9820. If the size is 2.9"x4.4"x0.6" it's a ROM for the 9830.
Re: Mystery Ancient HP Memory Modules - Eric Smith - 03-06-2004 Long narrow modules? If so, I think they are HP 9845 ROMs. Do the labels have either a green or black background? Is there a conspicuous white triangle, square, or circle on the label?
Re: Mystery Ancient HP Memory Modules - Vassilis Prevelakis - 03-08-2004 Looks like one of the 14 OS ROMs for the 9825A.
Unlike later models (B and T), the A model had a drawer
The ROMs look a like the HP-85 ROMs, plastic packges with Unlike the 85 ROMs, the HP 9825 OS ROMs have holes all around the edges. I don't have a picture of the 9825 ROMS, but here is a picture of the 85 ROM drawer:
**vp
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