The Sinclair QL Forum

Hi Dilwyn

I sympathise :-) Something you've probably already explored, but thought to share...

Like most Routers, your EE SmartHub will be running an embedded Linux-variant and exposing any USB mass-storage via the SMB protocol. Typically, the version of the SMB protocol supported by these ...

Good morning all and happy Sunday!

Just a short announcement that this year's RetCon event is taking place on Saturday May 31st in West London - details and ticket sales available via the links further below.

IMG_20250511_131923.jpg

We're dead excited this year to be welcoming members of the ...

Hi t0nyt!

I'm not sure which version appears on the GitHub I'm afraid, but by default, the upper 16KB of the ROM memory space is mapped -out- in the Minerva MK2 carrier board, thus allowing other devices to use the ext ROM slot. Therefore, if you leave the standard pin connections in place (pin 6 ...

Hi Will!

A bit of back of the envelope arithmetic and your accelerator seems to be pushing just under 900KB per second to screen memory.

Compare that to the (nominal, uncontended) max bus rate of a 7.5MHz QL of less than 2MB per sec - about half that to contended screen memory - and your ...

Happy Birthday, Steve!

Now, I just need to find some time to explore your amazing 3D simulations and games!

Hi there!

With regard to DSMCL remaining high - bear in mind that this signal, in the absence of anything holding it high, is merely a resistor-coupled DSL as generated by the CPU itself.

You might want to measure DSL directly to see whether or not it too is stuck inactive/high.

On the Iss6/7 ...

Hi all!

Just to add/highlight - a working ZX8301 is essential - it delivers both the Clock to the CPU and also manages the DTACK line, without which, the CPU will never recognise a complete bus transaction and remain in limbo...

Still, I very much like the idea behind the original question!

Hi Peter

If you wish to stick to vanilla SuperBasic, then the following approach will work for any valid SuperBASIC program file:

1. Open the file with OPEN_IN as usual
2. Iterate through all its lines in a REPeat loop, INPUTing each one sequentially in to a variable, say lastLine$
3. Test before ...

Hi Leon!


I have good and bad news to report.

The bad news is that after the aurora modes and speed improvements QLion is no longer compatible with microdrives.


I may be able to give you a head-start there, as I had to rewrite some of the core MDV primitives (taken from Minerva) when I ...

Hi Will


Ah yes, the buffering, that makes sense. However, I was expecting at least DTACK to have some activity because I read somewhere the QL
Video circuit holds the bus by keeping DTACK low during an access...
I suppose the whole circuit could be messed up by not having any pull ups in place ...