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One ROM (x2)

Upgrade or replace the ROM.
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danboid
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One ROM (x2)

Post by danboid »

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.
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
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rubber_jonnie
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Re: One ROM (x2)

Post by rubber_jonnie »

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...
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: One ROM (x2)

Post by exxos »

Looks cool. I'll have to try it out myself when I get chance.
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danboid
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Re: One ROM (x2)

Post by danboid »

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.
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
ijor
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Joined: 30 Nov 2018 20:45

Re: One ROM (x2)

Post by ijor »

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
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danboid
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Re: One ROM (x2)

Post by danboid »

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 cheapest SideCartrige Tos Emulator is about $60 vs approx $10 for 2x One ROMs.
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
ijor
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Joined: 30 Nov 2018 20:45

Re: One ROM (x2)

Post by ijor »

danboid wrote: 22 Feb 2026 22:18 The cheapest SideCartrige Tos Emulator is about $60 vs approx $10 for 2x One ROMs.
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.
http://github.com/ijor/fx68k 68000 cycle exact FPGA core
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
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danboid
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Re: One ROM (x2)

Post by danboid »

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?
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
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exxos
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Re: One ROM (x2)

Post by exxos »

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?
Can you please start a new thread if you are changing topic onto something totally different.
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danboid
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Re: One ROM (x2)

Post by danboid »

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
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

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