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Atari ST HCS Board?

Posted: 26 Dec 2025 05:34
by Darklord
Saw this on Ebay. I don't believe I've ever seen it before.

Does anyone know what it is? Ebay listing says it's an "Atari ST HCS Board",
and goes on to guess that it might be an RGB mod.

Thanks.

s-l1600.jpg
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s-l1602.jpg

Re: Atari ST HCS Board?

Posted: 26 Dec 2025 09:50
by exxos
Looks like ram expansion board.

Re: Atari ST HCS Board?

Posted: 26 Dec 2025 10:32
by rubber_jonnie
exxos wrote: 26 Dec 2025 09:50 Looks like ram expansion board.
I was about to suggest that too, seems to have SIL RAM ICs on board.

Re: Atari ST HCS Board?

Posted: 26 Dec 2025 10:53
by exxos
rubber_jonnie wrote: 26 Dec 2025 10:32 I was about to suggest that too, seems to have SIL RAM ICs on board.
Yep. That type would be suitable for machines with a SMT MMU.. But of course, soldering all those wires is a PITA. If its not got install instructions, then good luck ;)

Re: Atari ST HCS Board?

Posted: 26 Dec 2025 10:56
by rubber_jonnie
exxos wrote: 26 Dec 2025 10:53
rubber_jonnie wrote: 26 Dec 2025 10:32 I was about to suggest that too, seems to have SIL RAM ICs on board.
Yep. That type would be suitable for machines with a SMT MMU.. But of course, soldering all those wires is a PITA. If its not got install instructions, then good luck ;)
Yeah, good luck with finding instructions!

Re: Atari ST HCS Board?

Posted: 26 Dec 2025 17:53
by Darklord
Yeah, I wasn't actually thinking about buying it. I just couldn't remember
seeing a board like this before.

The item is located in Italy, btw.

Thanks for the info gang. :)