The Sinclair QL Forum

The direm keyboard interface do the same with a pic at 20mhz, so the Pico at more than 100mhz shall be able even with the overload of do it in C instead of assembler.

I theoretically have A06 on a floppy disk, but I just scrapped another disk drive trying to recover it :evil:

As for QuillA07, I'd be interested to know what number of system messages it goes up to. On my copy, they are empty apart from 30 and 31 (Y/N, respectively). But it needs to go up to 35 ...

For the RTC clock you need the original Minerva tools (are on Dilwing site) to set the clock.
If not you only see that the message of the Minerva on boot show that hold the clock, to the same all time.

@aalea - at the beginning - BIG thank you for your work!

By "third" I meant my variation on Mini Trump 3 that also works flawlessly.

I'm using Sony MFP920 drive that is said to work OK and it is (tried also Alps - not OK).

This is really strange - I use the same drive, same cable and SAME ICs ...

What do you mean that you have a third ? Where come the Gerber? It's also like the blue?

Frankly speaking I'm in the same situation, I have several mini trump 3 that work always, but have several clone of the 2 and work depends on the weather...

Work perfectly, I put in the drawer and one moth ...

This is the famous 'Spanjer' RAM expansion, named after the father and son who supplied (and optionally fitted) it.

They soldered out the old 64K chips, fitted 256K chips, and added a bit of extra logic (74LS157 multiplexer and PROM for address decoding). The result was 512K internal RAM, which ...

Is for version 4 of the CST, so in the one with version 1.18, if you have 1.16 or below the board is different and not compatible.
I do not have information of anybody with version 1.17, but if any have a picture I can indicate you with version is the maximum.

I use a tool for windows call "AFS Rom Suite MD – Utility" this allow several things, like split and join roms, and swaps bits and address line, in the "pins -> Address Pins (8bits)" is possible to configure the changes to modify the ROM, you can even save the configuration for later use.

I just ...

I have Bads and Goods News, I think is funny, but not sure that other think the same...

I was in contact with Andrews Craig from facebook, he has a working 1.19 Interface and a eprom programmer, so he was kind enough to remove ROM from his interface and read it.

(And this is de Bad News) his ...

I want to remember that I have the schematic and PCB of the Thor here:
https://github.com/alvaroalea/QL_Thor20/tree/main/Thor_20_expansion

The memory expansion are basically 2 multiplexer, 2 chained buffer, a GAL and de 16 RAM chips, but other logic are also involved.

Unfortunately, I do not have ...