Has anyone tried One ROM (two One ROMs) with their STe or any ST family computer yet?
https://github.com/piersfinlayson/one-rom
https://onerom.org/
This might allow people to upgrade / change TOS versions without having to buy a chip programmer or remove the chips to reprogram them.
Obviously we're going to need two of these for the ST(e) but it should be possible to buy/build two for less $10.
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One ROM (x2)
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danboid
- Posts: 124
- Joined: 18 Jul 2024 19:25
One ROM (x2)
The 'Uzebox Omega is a fully open source games console that you can build in a weekend, even with no previous electronics experience:
https://uzebox.org/wiki/Omega
https://uzebox.org/wiki/Omega
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rubber_jonnie
- Site Admin

- Posts: 14586
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- Location: Essex
Re: One ROM (x2)
I haven't tried them but I feel I ought to!!!
They are very cheap and look like they could be super useful as it seems to be able to replace a lot of different ROM types.
How did this pass me by...
They are very cheap and look like they could be super useful as it seems to be able to replace a lot of different ROM types.
How did this pass me by...
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...
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: One ROM (x2)
Looks cool. I'll have to try it out myself when I get chance.
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danboid
- Posts: 124
- Joined: 18 Jul 2024 19:25
Re: One ROM (x2)
Great, glad I could introduce the forum to a potential new upgrade.
I posted this on the Atari forum first and I was disappointed by the lack of enthusiasm. Some people don't like microcontrollers it seems but there's at least one MCU in the ST already for the keyboard so I really don't understand that as a reason to snub this.
I posted this on the Atari forum first and I was disappointed by the lack of enthusiasm. Some people don't like microcontrollers it seems but there's at least one MCU in the ST already for the keyboard so I really don't understand that as a reason to snub this.
The 'Uzebox Omega is a fully open source games console that you can build in a weekend, even with no previous electronics experience:
https://uzebox.org/wiki/Omega
https://uzebox.org/wiki/Omega
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ijor
- Posts: 825
- Joined: 30 Nov 2018 20:45
Re: One ROM (x2)
That's cool. But we had already the SideCartrigeTosEmulator for quite some time. Which is about the same except that is designed specifically for "emulating" whole TOS ROM with a single device, and not generic, individual ROM chips. I believe he actually has a generic ROM emulator as well, but not sure if the pinout is compatible with standard EPROMs.
http://github.com/ijor/fx68k 68000 cycle exact FPGA core
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
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danboid
- Posts: 124
- Joined: 18 Jul 2024 19:25
Re: One ROM (x2)
The cheapest SideCartrige Tos Emulator is about $60 vs approx $10 for 2x One ROMs.ijor wrote: 22 Feb 2026 21:32 That's cool. But we had already the SideCartrigeTosEmulator for quite some time. Which is about the same except that is designed specifically for "emulating" whole TOS ROM with a single device, and not generic, individual ROM chips. I believe he actually has a generic ROM emulator as well, but not sure if the pinout is compatible with standard EPROMs.
The 'Uzebox Omega is a fully open source games console that you can build in a weekend, even with no previous electronics experience:
https://uzebox.org/wiki/Omega
https://uzebox.org/wiki/Omega
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ijor
- Posts: 825
- Joined: 30 Nov 2018 20:45
Re: One ROM (x2)
That's true. It's expensive. But it is a different beast. It has dedicated flash to store multiple TOS images, and wifi to upload images directly online. Specific host software, etc. But again, yes, it's expensive.danboid wrote: 22 Feb 2026 22:18 The cheapest SideCartrige Tos Emulator is about $60 vs approx $10 for 2x One ROMs.
http://github.com/ijor/fx68k 68000 cycle exact FPGA core
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
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danboid
- Posts: 124
- Joined: 18 Jul 2024 19:25
Re: One ROM (x2)
OT:
Are you going to do a 060 version of your FPGA? Is there already an open source 060 FPGA core?
I don't think the Vampire 080 / SAGA is open source is it?
Are you going to do a 060 version of your FPGA? Is there already an open source 060 FPGA core?
I don't think the Vampire 080 / SAGA is open source is it?
The 'Uzebox Omega is a fully open source games console that you can build in a weekend, even with no previous electronics experience:
https://uzebox.org/wiki/Omega
https://uzebox.org/wiki/Omega
-
exxos
- Site Admin

- Posts: 28132
- Joined: 16 Aug 2017 23:19
- Location: UK
Re: One ROM (x2)
Can you please start a new thread if you are changing topic onto something totally different.danboid wrote: 22 Feb 2026 23:13 OT:
Are you going to do a 060 version of your FPGA? Is there already an open source 060 FPGA core?
I don't think the Vampire 080 / SAGA is open source is it?
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danboid
- Posts: 124
- Joined: 18 Jul 2024 19:25
Re: One ROM (x2)
Sorry about that exxos! I'll try to stay on topic.
Success!
A member of the Atari forum has got one rom working with their 1040STF.
https://github.com/piersfinlayson/one-r ... ssions/190
Success!
A member of the Atari forum has got one rom working with their 1040STF.
https://github.com/piersfinlayson/one-r ... ssions/190
The 'Uzebox Omega is a fully open source games console that you can build in a weekend, even with no previous electronics experience:
https://uzebox.org/wiki/Omega
https://uzebox.org/wiki/Omega
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