The Sinclair QL Forum

thx,
if i provide 9V on VIN, the 7805 in the QL should generate the 5V, not ?

as said, i also tested that, providing 9V to VIN and the QL booted fine into minerva

Hi,
I'd like to ask if anyone knows if the QL could be fully powered via the 64pin expansion connector. I've tried to apply 9V on VIN and the QL boots up into minerva.

The Service Manual says:

>8.1 A custom-built power pack, external to the main board, supplies 9 volts d.c. at 2 amps and 44 ...

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.