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Acorn Atom Replica build

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rubber_jonnie
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

PhilC wrote: Tue Mar 10, 2026 1:51 pm :cheer: :cheer: :cheer:

Well done Mr Jonnie.

I'm going to look at overclocking mine to 2 and 4mhz at some point too.
Thanks. Mine is still not 100% complete, I need to get a few odds and sods and a speaker would be nice too, but it does at least run.

I'd like to add an FDD interface so that may well be next :)
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 »

JezC wrote: Tue Mar 10, 2026 2:34 pm Glad to see that you've beaten it into submission!

:thumbup:
Thanks, but bloody annoying that CPU died, it was in my drawer of working parts.

I'm down to a single spare 6502 now...
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 »

And the dodgy key switch is fixed. Turned out that the switch was fine, but my soldering wasn't...

So a swift reflow of the pin and the key sprang into life.

All the ICs are back in now and it seems to be working as expected. Happy days :)

:girldance: :girldance: :girldance:
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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PhilC
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Re: Acorn Atom Replica build

Post by PhilC »

rubber_jonnie wrote: Tue Mar 10, 2026 2:56 pm
PhilC wrote: Tue Mar 10, 2026 1:51 pm :cheer: :cheer: :cheer:

Well done Mr Jonnie.

I'm going to look at overclocking mine to 2 and 4mhz at some point too.
Thanks. Mine is still not 100% complete, I need to get a few odds and sods and a speaker would be nice too, but it does at least run.

I'd like to add an FDD interface so that may well be next :)
I did get a FDD PCB but instead got an AtoMMC from one of the guys on Stardot
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: Tue Mar 10, 2026 3:07 pm
rubber_jonnie wrote: Tue Mar 10, 2026 2:56 pm

Thanks. Mine is still not 100% complete, I need to get a few odds and sods and a speaker would be nice too, but it does at least run.

I'd like to add an FDD interface so that may well be next :)
I did get a FDD PCB but instead got an AtoMMC from one of the guys on Stardot
Hmm, that sounds like a plan, how does it install? Is it in one of the ROM sockets?
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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PhilC
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Re: Acorn Atom Replica build

Post by PhilC »

rubber_jonnie wrote: Tue Mar 10, 2026 3:34 pm
PhilC wrote: Tue Mar 10, 2026 3:07 pm

I did get a FDD PCB but instead got an AtoMMC from one of the guys on Stardot
Hmm, that sounds like a plan, how does it install? Is it in one of the ROM sockets?
I got a year at the same time, which is a programmable rom board, so that had the rom fort. In my Atom I've got it sitting inside, off of one of the small headers. Apparently you can split half of it to have the SD card slot outside but I left mine inside.
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: Tue Mar 10, 2026 3:38 pm
rubber_jonnie wrote: Tue Mar 10, 2026 3:34 pm

Hmm, that sounds like a plan, how does it install? Is it in one of the ROM sockets?
I got a year at the same time, which is a programmable rom board, so that had the rom fort. In my Atom I've got it sitting inside, off of one of the small headers. Apparently you can split half of it to have the SD card slot outside but I left mine inside.
Thanks will take a look.
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: Acorn Atom Replica build

Post by stephen_usher »

:yay: :dualthumbup: :yay2: :cheer: :girldance:
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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Re: Acorn Atom Replica build

Post by HigashiJun »

:bravo:
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rubber_jonnie
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Re: Acorn Atom Replica build

Post by rubber_jonnie »

Thanks all 😁
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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