QL Custom ROM bootloader for (S)GC

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janbredenbeek
Super Gold Card
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Joined: Wed Jan 21, 2015 4:54 pm
Location: Hilversum, The Netherlands

QL Custom ROM bootloader for (S)GC

Post by janbredenbeek »

I have written a small 128-byte boot loader which allows you to boot any compatible QL ROM (AH, JM, JS, MG or Minerva) on your QL equipped with the GC or SGC. Now you can run your favourite ROM without burning EPROMs or risky hardware mods.

You can find it on the GitHub repository here.

Many credits to Marcel Kilgus for his article on the (S)GC boot process. It has been quite a mystery to me for the past 30 years how the Gold Card managed to run a patched QL ROM on a hardware extension that is essentially a system on its own and reduce the QL to a keyboard, video adapter and some I/O peripherals (yes, it could run without the 68008 too!).

I've only tested this on my v2.49 Gold Card, so if you have a different configuration I'd be happy to hear your test results.

Cheers, Jan.


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pjw
QL Wafer Drive
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Re: QL Custom ROM bootloader for (S)GC

Post by pjw »

Brilliant! :)


Per
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