smaller HP 82166A with 32-pin connector
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09-07-2021, 10:45 AM
(This post was last modified: 09-07-2021 10:50 AM by KimH.)
Post: #23
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RE: smaller HP 82166A with 32-pin connector
The idea of connecting the Plotter as you have done here - or even a RAM block - is now on my list, once it starts raining again.
Cool inspiration, thank you for that! Have you tried working with the TRIGGER command and the GETO-line on the interface? My fist couple of attempts controlling Inputs from the 165A with a TRIGGER did not yield anything sensible. On top the documentation I can find regarding TRIGGER/GETO is not exactly great. Any ideas are welcome! (09-06-2021 07:37 AM)Klaus Overhage Wrote: Actually, this byte should also be available some time before and after the strobe, but the HP 82165 as well as the HP 82166A switch the 8 data lines to high resistance (TRISTATE) immediately after setting the strobe line high again, which is read by the X-710 as 255. Inverting the strobe line did not help either, nor did an extension of the DAVO signal with the help of registers R02 and R03 of the HP devices. |
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