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HP-97 Service Manual, newer model
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Post: #2
09-14-2013, 03:27 AM
 I received the HP museum DVD recently and discovered that my HP-97 model isn't the same as the one mentioned in the service manual, mostly noticeable in the different PCB layout. Is there a newer version of the HP-97 service manual available? It has an unpopulated 16-pin DIP socket which might have something to do with IO capabilities.
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Post: #3
09-14-2013, 03:49 AM
Yes, that footprint is for a cable to the I/O box of an HP-97S. Aside from the added DIP footprint, there is no electrical difference. ▼
Post: #4
09-14-2013, 03:52 AM
Ah I see...
Is there a documented PCB layout or PCB picture with references to the different chips?
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Post: #5
09-14-2013, 03:56 AM
While not exactly what you're looking for, I discuss this a bit in this article about how you might make use of that extra socket.
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Post: #6
09-14-2013, 04:09 AM
Hi Katie This seems to be perfect for capturing the ACT timings with my LeCroy or with a FPGA analyzer. Are the ROM dumps or assembly listings somewhere available?
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Post: #7
09-14-2013, 12:46 PM
I've never seen an assembly listing for the 97, but there are ROM dumps around. See Eric Smith's Nonpareil.
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Post: #8
09-16-2013, 10:45 AM
Me neither..only an assembler listing for the HP-67 from the HP-67 Java simulator. Though honestly, to me it doesn't look like an assembler listing at all as in the listing I don't see any assembled output that makes sense to me:
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