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Atari ST HCS Board?

General discussions or ideas about hardware.
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Darklord
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Atari ST HCS Board?

Post 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.

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Re: Atari ST HCS Board?

Post by exxos »

Looks like ram expansion board.
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Re: Atari ST HCS Board?

Post by rubber_jonnie »

exxos wrote: Fri Dec 26, 2025 9:50 am Looks like ram expansion board.
I was about to suggest that too, seems to have SIL RAM ICs on board.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
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Re: Atari ST HCS Board?

Post by exxos »

rubber_jonnie wrote: Fri Dec 26, 2025 10:32 am 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 ;)
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Re: Atari ST HCS Board?

Post by rubber_jonnie »

exxos wrote: Fri Dec 26, 2025 10:53 am
rubber_jonnie wrote: Fri Dec 26, 2025 10:32 am 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!
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: Atari ST HCS Board?

Post 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. :)
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