20-02-2022, 04:34 PM
Hi all,
I have since the last posting, been able to get colour output from my Bee.
I had a look at the project CheshireNoir had posted (https://github.com/ramapcsx2/gbs-control)
Like most converters I found, it does 2 basic things - combine a HSYNC and VSYNC signal to produce a single CSYNC.
And combine the colour and intensity signals into an analogue scaled output, using 2 resistors - a 470 for the colour and a 680 for the intensity.
As the Bee does already produces a single CSYNC signal - I could skip this - and I only needed a way to feed RGB colours to my GBS8200 up-converter.
So, got out the breadboard, found some resisters and wired up a temporary converter to feed the GBS8200 upconverter. (I did add a 1K resister to the CYSNC to reduce the level going to the GBS8200.)
And on powerup I was presented with glorious colours!
Now, I don't really know if this is producing a 'good' matching signals --- no ideas (and barely understand) if the impedance and such things are 'correct'.
Nor do I know if the colour scale is right.
I initially powered on, without wiring the intensity signals - and got some good colours on boot up. The background was defaulting to black.
So i then added the resisters for the intensity signals - and now I think i am getting more colours - not sure how to fully test this.
But the picture quality seem fine - but I am not sure if the colours are right. See attached - never had a Bee with the boot up menu - is it meant to be grey background like is attached?
Anyway - I might when i get a chance, design a little circuit board with the appropriate connectors to make it a little less 'brittle'
Cheers
Dean
I have since the last posting, been able to get colour output from my Bee.
I had a look at the project CheshireNoir had posted (https://github.com/ramapcsx2/gbs-control)
Like most converters I found, it does 2 basic things - combine a HSYNC and VSYNC signal to produce a single CSYNC.
And combine the colour and intensity signals into an analogue scaled output, using 2 resistors - a 470 for the colour and a 680 for the intensity.
As the Bee does already produces a single CSYNC signal - I could skip this - and I only needed a way to feed RGB colours to my GBS8200 up-converter.
So, got out the breadboard, found some resisters and wired up a temporary converter to feed the GBS8200 upconverter. (I did add a 1K resister to the CYSNC to reduce the level going to the GBS8200.)
And on powerup I was presented with glorious colours!
Now, I don't really know if this is producing a 'good' matching signals --- no ideas (and barely understand) if the impedance and such things are 'correct'.
Nor do I know if the colour scale is right.
I initially powered on, without wiring the intensity signals - and got some good colours on boot up. The background was defaulting to black.
So i then added the resisters for the intensity signals - and now I think i am getting more colours - not sure how to fully test this.
But the picture quality seem fine - but I am not sure if the colours are right. See attached - never had a Bee with the boot up menu - is it meant to be grey background like is attached?
Anyway - I might when i get a chance, design a little circuit board with the appropriate connectors to make it a little less 'brittle'
Cheers
Dean