The Sinclair QL Forum

thx for your help so far, i guess i'll go ahead (for this QIMSI) with

- Solder the connector again, and wire 5V from ROM port pad B1 to pin 1 of the connector.
- Alternatively, solder microUSB pin 1 to the other microUSB socket's pin 1.
- Alternatively, solder microUSB pin 1 to I/O port pin 2 ...

hi all,

Unfortunately i managed to break my 2nd (standard-)qimsi keyboad-connector now. The usb connector simply broke off its solder-pads and one of the solder pads even ripped off from the pcb (after resoldering the usb connector 2 times). on the other qimsi i even manged to rip off 3 of the ...

thanks for the hints !

i tried that


100 before = PEEK_L(786448)
110 FOR i% = 0 to 1023 STEP 4
120 val% = PEEK_L(170000)
130 END FOR i%
140 after = PEEK_L(786448)
150 millis = after - before
160 PRINT millis

on Minerva (no TK2) and the result seems to be quite similar, around 1200ms for the ...

hi and thx martyn,

i have minerva running on that machine. i had a "for i=0 to 1024 step 4", will try to figure out how that "integer handling" works in sbasic. or try to somehow get the C impl working.
and yes, i'm using DMSCL to "take control"

hi all,
back to this, i now have (after tons of learning regarding tooling) a working prototype, means i can write to the PIC and also read from it.
Fixed addresses space and what not, doesn't matter, when writing smth to a matching address i get it back when reading from the address.

First ...

i also want to have that great masterpiece, please add to me also to the list. i'll send you a PM ..

i also had that problem with DSMCL already, means i thought i have to set it low when its my turn, but in-fact its the other way-round...

btw i think im also wiring the colors the csync & vsync and that VPAL to the "next" connector, but i dont think i need them on this extension.

thx a lot ! will read..

... hm, that sounds very thrilling, but i have problems understanding why the extension should be in the address spaces mentioned


-- until some unlucky person designs a peripheral that sits up at the address $FFFF5, which may generate /DTACK faster (so problems might ...

hi martyn_hill,

okay thank you, never heard of that, do you maybe have some pointer for more info ? does it also include DS(L) asserted ?
would mean i need to wire FC0 & FC1 then to the CPLD (and sacrifice 2 of the "free" pins). i got some CUPL inspiration from a memory-expansion project in this ...