Sinclair QL - wanted one since 1984

[PhilC]

Ok, Ok, just chalk me up as being thick.

I did the research, determining which parts I needed for my PSU, only to then doubt myself, going down a rabbit hole into internet oblivion.

As I’m sure none of you are surprised, the PSU works as expected.

As for the QL, I couldn’t get a picture using UHF tonight, so I’m going to see about either a composite mod to the UHF port or if I’ve got a din plug to suit, an RGB to GBS8200 lead tomorrow, so I can get it to work on my VGA monitor.

There’s definitely life in the old QL. Pressing the F1 key pulses the micro drive motor, so hopefully once I’ve got the video working we can fix the rest

[stephen_usher]

It could still be a ULA problem if there's no video but everything else works as the RGB connector at the back is directly connected to the chip without buffering.

[PhilC]

It could still be a ULA problem if there's no video but everything else works as the RGB connector at the back is directly connected to the chip without buffering.

Ok thanks, I’ll get the scope out tomorrow and see what we’ve got.

[rubber_jonnie]

It could still be a ULA problem if there's no video but everything else works as the RGB connector at the back is directly connected to the chip without buffering.

Ok thanks, I’ll get the scope out tomorrow and see what we’ve got.

Hopefully you'll find something obvious.

[PhilC]

Just tried the QL with one of my GBS-8220 and….

6A31DA4C-C059-4458-8EC9-E7B3C9E28823.jpeg

It’s jumping up and down a lot and I’ve no idea what colour it should really be but then not bad for not fitting any resistors in the cable :lol:

A bit more Googling and resistor fitting and I think I’ll be sorted. Then time to carry out some maintenance and testing on the old girl.

[PhilC]

So if you guys do want to use a GBS with your QL it looks like a 1K resistor on CSYNC will sort out the sync issue. It's now lovely and stable.

Some others have changed the resistors on the RGB line but since I'm going to use this GBS with just the QL I'm going to adjust the RGB pots on the board instead.

[stephen_usher]

Yay!

Of course, the monitor mode will be too wide for any monitors and you'll miss a few characters either side. :-)

[PhilC]

Yay!

Of course, the monitor mode will be too wide for any monitors and you'll miss a few characters either side. :-)

Apparently monitor mode does display ok on the GBS. I’ll try it later and will post a pic, not that I’ve got anything to test it with yet.

[Wrangler]

Nice one! Glad it's basically working

[rubber_jonnie]

Just tried the QL with one of my GBS-8220 and….


6A31DA4C-C059-4458-8EC9-E7B3C9E28823.jpeg


It’s jumping up and down a lot and I’ve no idea what colour it should really be but then not bad for not fitting any resistors in the cable :lol:

A bit more Googling and resistor fitting and I think I’ll be sorted. Then time to carry out some maintenance and testing on the old girl.

Sweet :)

:girldance: :girldance: :girldance: