The Sinclair QL Forum

Been messing around with the HD-VC9900 boards, similar to the GBS-8220 but outputs to HDMI instead of VGA. I use the gbs-control custom firmware (https://github.com/ramapcsx2/gbs-control) and a Wemos D1 Mini Wifi board. Results are excellent with the custom firmware handling both the TV & Monitor mode really well.

The custom firmware didn't require any alteration to the sync signal or the RGB so a straight through 8pin to 6pin DIN connector to plug it all in. A similar DIN to VGA cable will also work I just set mine up with a 6pin DIN so I can use it with my Amstrad CPC6128 and BBC Micro as well.

I've also created a 3D printed case for the board https://www.thingiverse.com/thing:5335139

Anyway some photos:

Nice job TomDD. Only one comment: the case should be totally black
I've been using the GBS board for many years, and I knew abot the custom firmware, but the upgrading process was quite complex for my limited capabilities. Could you tell me if there is a simple way to flash the firmware today?

Coincidentally, I just ordered one of these in the US last week. Only $34. I am thinking of making a universal input panel for it as part of my rack system, so it can auto switch between multiple sources.

Dave wrote:I am thinking of making a universal input panel for it as part of my rack system, so it can auto switch between multiple sources.

Clever idea

Cristian wrote:Nice job TomDD. Only one comment: the case should be totally black
I've been using the GBS board for many years, and I knew abot the custom firmware, but the upgrading process was quite complex for my limited capabilities. Could you tell me if there is a simple way to flash the firmware today?

Not had any issues with the latest firmware just using the Arudino IDE on my PC via USB. I prefer the D1 Mini boards over the others so would recommend that. Also the author of the gbs-control has created a nice guide to flashing https://github.com/ramapcsx2/gbs-contro ... ware-Setup

TomDD wrote:

Cristian wrote:Nice job TomDD. Only one comment: the case should be totally black
I've been using the GBS board for many years, and I knew abot the custom firmware, but the upgrading process was quite complex for my limited capabilities. Could you tell me if there is a simple way to flash the firmware today?

Not had any issues with the latest firmware just using the Arudino IDE on my PC via USB. I prefer the D1 Mini boards over the others so would recommend that. Also the author of the gbs-control has created a nice guide to flashing https://github.com/ramapcsx2/gbs-contro ... ware-Setup

Just set-up a new D1 Mini and followed the instructions and it flashed first time no problems.

Dave wrote:Coincidentally, I just ordered one of these in the US last week. Only $34. I am thinking of making a universal input panel for it as part of my rack system, so it can auto switch between multiple sources.

Just ordered one, £32.74 (incl VAT & postage with current discount: https://www.ebay.co.uk/itm/353822802777), not quite as good as $34 though

Be interested to see input panel, something that sounds useful

TomDD neat case!

Have also updated my GBS-8200 case for those interested, same design as the HDMI version https://www.thingiverse.com/thing:5340983

TomDD wrote:
Not had any issues with the latest firmware just using the Arudino IDE on my PC via USB. I prefer the D1 Mini boards over the others so would recommend that. Also the author of the gbs-control has created a nice guide to flashing https://github.com/ramapcsx2/gbs-contro ... ware-Setup

Thak you Tom

TomDD wrote:Have also updated my GBS-8200 case for those interested, same design as the HDMI version https://www.thingiverse.com/thing:5340983

Tke next big update will be the black color