The Sinclair QL Forum

This is a good idea for a project, tetroid. I would suggest including these versions: JM ( fairly common in UK, useful for testing software, fairly similar to AH) JS (most common uk rom) MG - some of the most widely used national variants such as French/German), note that MGUK is a private non Sinc...

Sadly, no... On the QL the ROMOEH line that selects the ROM is only generated for read cycles, and writes are necessary for programming the Flash chip in-circuit. Even worse, if a GC or SGC is used, the board does not even generate write cycles on the bus when addressing these addresses :( I maybe ...

vanpeebles wrote:That looks great! Would it be possible to have the switches on the end of a long cable? (To save opening the QL)

Thank you , good idea.
It is only necessary to find a place on the case, where to mount this switch.

I seen Minerva ROM based on standard 27C512 ROM and I think is not easy to install on standard QL ROM socket, bacause of its big physical size. I am try to make more flat ROM replacement. http://cats-chess.narod.ru/QL/PICS/ROMSW02.jpg http://cats-chess.narod.ru/QL/PICS/ROMSW03.jpg http://cats-chess....

tofro wrote:Just out of interest:

In your GoldCard clone, have you re-engineered the CPLD equations? I thought the Ingot JEDEC wasn't known yet?

Thanks
Tobias

I have original INGIT5 JEDEC.

Thank you very much.
I will try to make it.

Hi Tedroid The one modification that could add value and use some (though not all) of the spare 256KB SRAM - and would require NO software adjustment - is the shadowing of the first 128KB of standard QL memory. Its pretty trivial to accomplish and results in WRiting to both SRAM and internal 128KB ...

No, used only 768Kb of 1Mb. I can add this memory, If anybody will advise the way to inplementing additional 256K into QL memory map, supporting by software. As far as I am aware, even the old OS versions support 2M of RAM but the CPU does not have the required size of the address map (1M total). F...

No, used only 768Kb of 1Mb.
I can add this memory, If anybody will advise the way to inplementing additional 256K into QL memory map, supporting by software.

Nasta wrote:
Eh, I was hoping you had the 2V4 equations - the circuit seems a bit odd and I was looking forward to figuring out how it works

2V4 PAL16L8 euations