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Acorn Atom Replica build

Blogs & guides and tales of woo by forum members.
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PhilC
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Re: Acorn Atom Replica build

Post by PhilC »

rubber_jonnie wrote: 22 Feb 2026 17:01
PhilC wrote: 22 Feb 2026 16:32 Looking good Jon. Hope those other bits have come in handy too.
I haven't done anything with the video board yet but I've used all of the RAM and logic ICs you sent :)

On question though, with Regards to the ROMs (You sent me two but I've not tried to read them yet) do you know what images are available for the 27C512's that this board uses?
I don't be honest, so you'll probably need to do a bit of googling? Hopefully you can use it for a few extra Atom roms? The two I sent were the standard roms I believe, ie OS and Basic.
If it ain't broke, test it to Destruction.
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rubber_jonnie
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

PhilC wrote: 22 Feb 2026 17:04
rubber_jonnie wrote: 22 Feb 2026 17:01

I haven't done anything with the video board yet but I've used all of the RAM and logic ICs you sent :)

On question though, with Regards to the ROMs (You sent me two but I've not tried to read them yet) do you know what images are available for the 27C512's that this board uses?
I don't be honest, so you'll probably need to do a bit of googling? Hopefully you can use it for a few extra Atom roms? The two I sent were the standard roms I believe, ie OS and Basic.
Cool thanks, I'll do some digging. My TL866 doesn't like either ROM so I think I'll have to pull out my older DOS based programmer to see if I can read them.

I may ask over at Stardot, I'm sure somebody over there can help.
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Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

OK, so more parts arrived today, but not enough to complete the Atom.

Amongst them was this:

IMG20260227130956.jpg

And if that isn't period correct I don't know what is, though I may feel guilty about opening it up sinxce it survived so long.
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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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mrbombermillzy
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Re: Acorn Atom Replica build

Post by mrbombermillzy »

Wow!

Like you say, you almost dont want to open that pristine packaging with so much history!

At least you can be sure its not a fake. :lol:
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

mrbombermillzy wrote: 27 Feb 2026 13:31 Wow!

Like you say, you almost dont want to open that pristine packaging with so much history!

At least you can be sure its not a fake. :lol:
Yeah, I'm pretty confident it isn't :)
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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exxos
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Re: Acorn Atom Replica build

Post by exxos »

rubber_jonnie wrote: 27 Feb 2026 13:18 OK, so more parts arrived today, but not enough to complete the Atom.

And if that isn't period correct I don't know what is, though I may feel guilty about opening it up sinxce it survived so long.
Wow, that was some slow postage ! :lol: :hide:
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PhilC
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Re: Acorn Atom Replica build

Post by PhilC »

Wonder if it's still under warranty? :lol:
If it ain't broke, test it to Destruction.
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rubber_jonnie
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

exxos wrote: 27 Feb 2026 14:46
rubber_jonnie wrote: 27 Feb 2026 13:18 OK, so more parts arrived today, but not enough to complete the Atom.

And if that isn't period correct I don't know what is, though I may feel guilty about opening it up sinxce it survived so long.
Wow, that was some slow postage ! :lol: :hide:
:lol:
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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rubber_jonnie
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

A few more parts fitted today, just waiting on the 6847, and some assorted logic ICs and then assembly is complete. I now have a ROM image as well, so I'll be able to give that a whirl and see what's what :)
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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rubber_jonnie
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

So very nearly at the point I could do a test:

IMG20260302113158.jpg

All I'm waiting on at the moment are the 6847 display chip and a 7445 logic IC. I'm hoping that it'll be built enough to test this week and then I can look at sorting out any missing connectors.
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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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