Page 1 of 2
One ROM (x2)
Posted: 21 Feb 2026 10:32
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.
Re: One ROM (x2)
Posted: 21 Feb 2026 10:54
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...
Re: One ROM (x2)
Posted: 21 Feb 2026 17:26
by exxos
Looks cool. I'll have to try it out myself when I get chance.
Re: One ROM (x2)
Posted: 22 Feb 2026 13:58
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.
Re: One ROM (x2)
Posted: 22 Feb 2026 21:32
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.
Re: One ROM (x2)
Posted: 22 Feb 2026 22:18
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.
Re: One ROM (x2)
Posted: 22 Feb 2026 22:58
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.
Re: One ROM (x2)
Posted: 22 Feb 2026 23:13
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?
Re: One ROM (x2)
Posted: 22 Feb 2026 23:21
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.
Re: One ROM (x2)
Posted: 25 Mar 2026 09:34
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