Chip Tester de 8bit-museum.de - Reloaded

Proyectos que no sean de hardware abierto o que no incluyan el código abierto

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Andorra WhatIsAMan
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Re: Chip Tester de 8bit-museum.de - Reloaded

Mensaje por WhatIsAMan » 01 Abr 2021, 15:52

slabbi escribió:
01 Abr 2021, 08:32
tbd: I am waiting for some logic ICs I would like to implement/check. Estimated release date of v.17 will be mid of April.
Nice!
Am I still in time to share a couple of CRC32 codes?

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Germany slabbi
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Re: Chip Tester de 8bit-museum.de - Reloaded

Mensaje por slabbi » 01 Abr 2021, 17:42

Sure :)
When you have a lot codes, you could also create an external file for it like I did for the synthesizer roms.

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Re: Chip Tester de 8bit-museum.de - Reloaded

Mensaje por WhatIsAMan » 01 Abr 2021, 19:57

No, don't worry. I'm about to finish as the amount of data I'm able to share is limited.

I'm going to go a bit off-topic, you are warned. Continue at your own risk. :D

There are three revisions of the P1/2 series:
  • The first one was just a relabel of the KISS computer from SKS. It had five ROMs in it: three TMS2716 for the system software, one extra TMS2716 to implement the character ROM and finally a 1702A in the beyboard board (not the keyboard control board) to store the scancodes as the control system was still very crude.
  • The second iteration was a major redesign of the computer. They redesigned the keyboard control board so it didn't relied anymore on a 1702A. As this ROM was removed, they could simplify the power supply and remove the -9v rail. At the end they left it with four ROMs, all of them TMS2716.
  • Finally, they made a last redesign which only concerned the CPU board. In order to save space in-board they combined the contents of two TMS2716 into a 2532 so this version has three ROMs in it.
In Spain, only three units of the local version were found: one is the first redesign and the other two are the final version. From those two, I own one and in addition I was able to get an Italian unit, which is from the first redesign.

This means four CRCs come from the Italian unit (the complete romset for that version of the computer), one from the only first-revision Spanish unit and two more CRCs from the Spanish final revision (the character ROM content was found to be the same among revisions). This accounts up to seven codes.

Still, three memories are still to be dumped, but they cannot be dealt with, at least soon. :?
You may feel proud of your device, those backups couln't have been made if we hadn't it. They will prove useful the day a Spanish P2 fails due to bad ROMs. ;)

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