The Sinclair QL Forum

First of all, this is a modification of my interface, I did was not aware that this version exist, and I'm not sure what it do or what kind of revision the maker use to do it, but assume that this is the last, based on the jumper of the top. (btw f|@¬½k the only things that the License of the PCB ...

I have both files: miniconfig_bas and I2C_IO_BIN on flp1_ main dir...
I do following things:
turn on QL
tk2_ext
lrespr flp1_I2C_IO_BIN
lrun flp1_miniconfig_bas
Am I missing sth?

Odds are you have a bad pfc8583 chip.

I have made a tester just to sort this out! Both the arduino sketch and a ...

Amazing. Thank you so much....

To fit the 74LS133 on the underside of the pcb I’m going to have to bend all the IC legs upwards

Any tips on how to do this without breaking them please?

Many thanks

I am afraid that will not do any good given the socket type on the QL is not hollow (at least on mine :-)) SO you would have to ...

It looks very nice! Have you published your solution? It'd be very helpful for other users.


Haven't published yet, still need to test the i2c as well. The battery holder fits a cr927, I am yet to see if the timekeeper current req of the smd pcf will make this a usuable solution.
That said, i ...

javier2112 wrote: Wed May 14, 2025 8:38 pm Do you have height enough to close the QL case using these pins and sockets for every IC? The space is very limited.

I also built the original few months ago, you can't close QL case, maybe if ditch the sockets (not sure). I have created my self a smd version mainly because of that.

Does the pcf also consumes the same current on standby/timekeeping mode?

C2 and C3 are probably for the crystal, they will vary depending of the capacitance of the crystal, but since they do not show up on the original schematics I suppose that is why you don't need to populate them. C1 is 30pf MAX, it is supposed to be trimmer exactly to adjust according as well to the ...

LRESPR flp1_i2c_bin before lrun flp1_miniconfig_bas did the trick...ty all for the inputs

t0nyt wrote: Wed Apr 30, 2025 11:07 am Try unremarking line 50 maybe (and put the line 1140 you changed back as it was)? This seems to load the file

50 REMark a=RESPR(202):LBYTES flp1_i2c_io_bin,a:CALL a

to

50 a=RESPR(202):LBYTES flp1_i2c_io_bin,a:CALL a

Unfortunately same result. Somehow it is failing to execute i2c_io