HP Forum Archive 14

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Which HP98xx desktops used std non-HP CPU?? Message #1 Posted by Bill Wiese on 7 Dec 2004, 12:14 p.m. Hi... I've seen a few items saying that a couple of HP 98XX desktops used nonproprietary CPUs - specifically, something in the 6800 series. Anyone know if this is true? Thanks! Bill Wiese San Jose

Re: Which HP98xx desktops used std non-HP CPU?? Message #2 Posted by Alex K. on 7 Dec 2004, 12:28 p.m., in response to message #1 by Bill Wiese The HP9815A/S used a Motorola 6800 microprocessor along with a 6800-family peripheral chip (I think it was a 6820 but I can't be certain without looking), standard RAM, etc. The other machines featured on the Museum website (9810/20/30 and 9825) all used HP proprietary CPUs. The later 9826/9836 machines use a Motorola 68000-family microprocessor. I hope this helps, Alex K. The Calculator Museum Web Page http://www.calcmuseum.com

Re: Which HP98xx desktops used std non-HP CPU?? Message #3 Posted by Tony Duell on 7 Dec 2004, 3:12 p.m., in response to message #2 by Alex K. Yes, the 9815 uses a Motorola 6800. I thought the other 40 pin chip was a 6821, but that's very similar to a 6820 anyway. The 9810/20/30 use 4 boards of mostly TTL chips with some small PROMs to make a bit-serial 16 bit processor. The 9825, etc have an HP multi-chip module with a large heatsink on top.

Re: Which HP98xx desktops used std non-HP CPU?? Message #4 Posted by Bill Wiese on 8 Dec 2004, 1:58 p.m., in response to message #2 by Alex K. Thank you Alex! Bill Wiese San Jose

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