The Sinclair QL Forum

Hi Jan,

this is fantastic news! Much better than the old history extensions, where I even had to use different versions, depending on what other software I was using. Also thanks to Marcel Kilgus, who (I think) wrote the SMSQ/E commandline history. Makes life so much easier.

Great job! All the ...

The best is probably to ask Marcel directly.

Hi,
QIMSI Gold introduced a ROM emulation feature for the QL side. You can place a ROM image named "QL_ROM.SYS" on SD card, overriding the SD card driver ROM with something else. Which could in your case be an empty ROM or a toolkit ROM which does not have side effects. If I remember correctly, this ...

Peter was suggesting that there might be a problem with the timing of reading and writing to registers... although I don't
know what I could do about that as I have already had to rewrite the Verilog state engine to make it exactly 68008 timing in
order to get it reading RAM reliably, I don't ...

XorA wrote: Sun Jul 13, 2025 10:35 am My emulator is based on Mushashi and boots Minerva fine.

That's good. Which of your emulators use Musashi, as you are maintaining several?

Funny you should mention Minerva, as I get a perfect boot up to the F1 F2 screen with a JS ROM, but Minerva goes a bit wonky, I think it has a very different RAM test procedure...

Minerva is also more demanding in terms of correctness of the CPU emulation.
I would not take for granted that ...

I know writing to the screen register is working as I can change between mode 4 and mode 8 and turn the screen off. This means my read and write mapping is ok.

But it does not necessarily mean all timings (and delays between accesses) are okay for all registers involved.
I think your problem at ...

Okay, the microdrives are point I understand. For me they always were good riddance and unused for over 30 years, so I didn't consider.

It would probably not too hard to make microdrive work on a Pi connected to GPIO port. If someone was particularly driven!

One could use a kernel with ...

bwinkel67 wrote: Fri Jul 11, 2025 10:53 pm I also think there is a slight difference between the emulation in a PiStorm and a software emulator written for Windows or Linux, isn't there?

This project is a software emulator for Linux, and depending on the underlying Linux OS.

If I remember correctly, there was mention of the GPIO sitting behind PCIe making things difficult. I have little doubt it will somehow be doable - but when the much more active Amiga scene has not accomplished it yet, that certainly sounds like much work.