HP 67 Power Supply (not oscillating)
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12-02-2023, 02:55 AM
(This post was last modified: 12-02-2023 03:05 AM by teenix.)
Post: #5
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RE: HP 67 Power Supply (not oscillating)
Nice
This is a list from my 67 emulator and shows what ROM pages (256 words) execute at start up to the key wait loop. ROM 0 $0000 - $00FF 1818-0268 ROM 2 $0200 - $02FF 1818-0268 ROM 4 $0400 - $04FF 1818-0228 ROM F $0F00 - $0FFF 1818-0231 or 1818-0232 (not sure) I don't have a list of RAM that might be accessed during start up, maybe I'll add that to the emulator when I get time. This is a list of 67 chip data that I got from my ROM/RAM reader. The last 2 I'm not sure of because the chips were faulty. I didn't want to remove these from a working board in case of damage like what happened with the ROM0 chip from a HP-92 - it fractured. Code:
cheers Tony |
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Messages In This Thread |
HP 67 Power Supply (not oscillating) - mbielman - 12-01-2023, 11:46 PM
RE: HP 67 Power Supply (not oscillating) - teenix - 12-02-2023, 12:24 AM
RE: HP 67 Power Supply (not oscillating) - mbielman - 12-02-2023, 12:58 AM
RE: HP 67 Power Supply (not oscillating) - mbielman - 12-02-2023, 01:44 AM
RE: HP 67 Power Supply (not oscillating) - teenix - 12-02-2023 02:55 AM
RE: HP 67 Power Supply (not oscillating) - mbielman - 12-02-2023, 03:56 AM
RE: HP 67 Power Supply (not oscillating) - teenix - 12-02-2023, 05:18 AM
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