How to RGB mod an Amiga CD32

[bacteria]

So, tried RGB from the Amiga CD32, tapping off the Sony CXA1145M chip. It is designed normally to take in RGB and covert the output into S-video and also composite. This chip is a lovely chip if you have it on a board, as it means you can output RGB easily, irrespective of if the console only claims normally to do RF. It was therefore very easy to RGB on the Sega SMS, was really handy on the UK version of the TurboGrafx for the same reason (the PC-Engine needs the RGB lines amplified normally), and on the Amiga CD32 too. If you tap off the TP9 lines, as seems the usual method, then the results are supposed to be poorer as the S-video conflicts, tapping off the CXA1145M chip makes this issue redundant.

 

Here is the pinout for the CXA1145M chip:

 

 

...and as it looks on the board...

 

 

Here is the output on a PSone screen, RGB mode. Using one of these screens for testing purposes, so I know RGB works before later in the project I wire all video modes to a Scart socket. The pictures came out fine; the image on the screen certainly looks crisp and nice. Camera pics are slightly out of focus!

 

 

 

Audio can be tapped as usual from the left and right audio plug contacts on the Amiga board.

[+remowilliams]

Very cool. I've got an SX32MK2 so I don't personally need it, but this could help some folks get nice video out for sure.

[Ze_ro]

Nicely done! Did you have to amplify the signal at all?

 

Also, the RGB signals are available on the expansion port too... or were you trying to keep that free for other things?

 

--Zero

[bacteria]

Nope, no amplification needed off the chip. If you take it off the expansion slot part (ie alternative to T9 area) you apparently need to amplify it.