Reading HP67 ROMs
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05-13-2022, 03:56 AM
Post: #12
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RE: Reading HP67 ROMs
Thank you, Dave! I sent you a reply.
Tony, again, thanks for the pull up information! Now that you mentioned about disconnecting the ACT from the Is bus, it got me wondering: to make a simple ROM test, I could just put it on a breadboard, supply clock and power supply voltages, and then watch for activity on data and Is lines, right? If I understand correctly, it's like each ROM acts as a simple microcontroller, capable of decoding simple commands and reacting accordingly, sometimes reading data, and other times asserting the bus to send data. I don't know it that would work, but if that helps sorting dead and good ROMs, this is all I need. But I'm looking forward for you PIC project, that will be awesome! Eduardo |
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Messages In This Thread |
Reading HP67 ROMs - Marcovecchio - 05-05-2022, 01:50 AM
RE: Reading HP67 ROMs - teenix - 05-05-2022, 03:59 AM
RE: Reading HP67 ROMs - teenix - 05-12-2022, 05:06 AM
RE: Reading HP67 ROMs - Marcovecchio - 05-05-2022, 10:53 PM
RE: Reading HP67 ROMs - teenix - 05-05-2022, 11:36 PM
RE: Reading HP67 ROMs - Marcovecchio - 05-06-2022, 01:51 AM
RE: Reading HP67 ROMs - teenix - 05-06-2022, 05:11 AM
RE: Reading HP67 ROMs - teenix - 05-07-2022, 12:41 AM
RE: Reading HP67 ROMs - Marcovecchio - 05-08-2022, 01:30 AM
RE: Reading HP67 ROMs - teenix - 05-08-2022, 02:34 AM
RE: Reading HP67 ROMs - Dreato - 05-12-2022, 04:28 PM
RE: Reading HP67 ROMs - Marcovecchio - 05-13-2022 03:56 AM
RE: Reading HP67 ROMs - teenix - 05-13-2022, 04:58 AM
RE: Reading HP67 ROMs - teenix - 06-05-2022, 10:37 AM
RE: Reading HP67 ROMs - Marcovecchio - 06-10-2022, 08:50 AM
RE: Reading HP67 ROMs - teenix - 06-10-2022, 12:52 PM
RE: Reading HP67 ROMs - teenix - 06-12-2022, 08:13 AM
RE: Reading HP67 ROMs - Marcovecchio - 06-25-2022, 10:57 PM
RE: Reading HP67 ROMs - teenix - 06-26-2022, 06:38 AM
RE: Reading HP67 ROMs - teenix - 06-28-2022, 02:34 AM
RE: Reading HP67 ROMs - teenix - 06-29-2022, 02:06 AM
RE: Reading HP67 ROMs - teenix - 07-12-2022, 03:28 AM
RE: Reading HP67 ROMs - Marcovecchio - 07-14-2022, 11:11 AM
RE: Reading HP67 ROMs - teenix - 07-21-2022, 01:34 AM
RE: Reading HP67 ROMs - tangdfx - 07-21-2022, 02:36 AM
RE: Reading HP67 ROMs - teenix - 07-21-2022, 02:58 AM
RE: Reading HP67 ROMs - tangdfx - 07-21-2022, 03:19 AM
RE: Reading HP67 ROMs - teenix - 07-21-2022, 03:48 AM
RE: Reading HP67 ROMs - tangdfx - 07-21-2022, 04:02 AM
RE: Reading HP67 ROMs - teenix - 07-29-2022, 08:38 AM
RE: Reading HP67 ROMs - Paul Dale - 07-30-2022, 09:05 AM
RE: Reading HP67 ROMs - Thomas Klemm - 07-30-2022, 10:23 AM
RE: Reading HP67 ROMs - teenix - 08-08-2022, 03:39 AM
RE: Reading HP67 ROMs - teenix - 08-27-2022, 08:04 AM
RE: Reading HP67 ROMs - teenix - 08-28-2022, 05:26 AM
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