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HP25 RAM
09-01-2021, 07:44 PM (This post was last modified: 09-01-2021 09:48 PM by Alexanderpentagon.)
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Alexanderpentagon Offline
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 		Posts: 8
Joined: Sep 2021
HP25 RAM
Hi , I'm new in this forum , Thank You for my admission.
I have two HP25 , one of two has ACT chip ok but RAM broken.. I would to fix the issue with a new circuit that emulate the function of the RAM . I'm collecting some information about the electric connection and logic operation of that chip.
I have found this:
https://www.hpmuseum.org/cgi-sys/cgiwrap...read=83799
but I need to know if there are some other info about RAM related instruction in order to made a microcontroller/cpld surrogate of that RAM.
Do You have some link or threads about that?
Thank You in advance
Alex
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Messages In This Thread
HP25 RAM - Alexanderpentagon - 09-01-2021 07:44 PM
RE: HP25 RAM - Dave Frederickson - 09-02-2021, 12:29 AM
RE: HP25 RAM - teenix - 09-02-2021, 01:42 AM
RE: HP25 RAM - Alexanderpentagon - 09-02-2021, 05:35 AM
RE: HP25 RAM - dmh - 09-02-2021, 03:42 AM
RE: HP25 RAM - Alexanderpentagon - 09-02-2021, 06:59 PM



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