Hello - Is anyone interested in having a model 98547A high-resolution video board for spare parts or for repair? This board used Topcat processors for 1024x768 resolution and 8-bit color depth. Unfort

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https://groups.io/g/VintHPcom/photo/239610/0/example.jpg?p=Created,,,20,2,0,0

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hi all, I would like to make a RAM expansion memory card for my HP-150A which have just 256K. To make a simple circuit, I would to use a static RAM. PAL 16L8 (HP part # 1820-3420) source code would be

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You are right. Ite middle pin is connected to ground trough the PCB. The PCB has 3 solder points for the power inlet the middle one is PE.

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Points well made. I remember that I did have an Eprom programmer that worked with the 2708 chips and that I did read out some chips back in about 1982. The programmer was attached to the parallel port

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Hello HP1000 A-Series Experts With the help of J. David Bryan I got the Ada/1000 Environment (PN 92125A Rev 5003) on my 6.21 System running (A990, 16MB RAM, 2.3GB SCSI HDD). But I am missing the Manua

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Yes, it's a WS version in a LIF disc image format, as we discussed it recently. It's better than nothing but it's a system file (no individual bin files), apparently built for a 68040 (there is the MC

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Looking for informations about vintage circuits uPD135, uPD106, uPD102 made by Hitachi or NEC. Circuits are in dual-in-line packages, maybe TTL (not sure). Thank you for any suggestion.

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The two part numbers I meant to reference were 533285-5 and 533492-1 https://www.te.com/usa-en/product-533285-5.html BOX II 4 ROW RECP ASSY 160 POS AMP AMP-HDI TE Part # 533285-5 TE Internal #: 533285

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it's "Devlin", not "Develin", sorry.

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, You may have already been to this resource , but if you haven't, here it is: http://rikers.org/hp2100/jeff/index.html Lots of stuff there.

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UPDATE : Boards have been claimed. Still available : Backplane Card Cage Case / front panel ?? And more important : the Power Supply that looks in (very) good shape.

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Hi all I recently got a 9815A on eBay and it was working except that some of the keys were sticky. So I disassembled the keyboard (there are a LOT of little screws in there...) and cleaned all the key

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I received this email at the HPmuseum.net site today - if anyone is interested in a 260, please contact Harald directly. Hi I have some old HP 260 from about 1985 . I guess best thing to do is just to

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I just have written the following message for the HP Caculator Museum's forum, but I think it might even fit better here, since this group is dedicated to the bigger machines ( series 200/300). BASIC

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I'm in the process of restoring an HP C1700C Model 20C Optical Disk library and need to get replacement toothed belts as they have perished and fallen apart. The HP Part numbers are C1700-60034 (inclu

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