ColecoVision TMS9928 Video IC to Sony CXA1145 RGB Encoder?

[thomas3120]

Looking at the datasheets.  Would it be possible to add the Sony RGB encoder:

[ChildOfCv]

Not directly.  The 9928 outputs Y, R-Y and B-Y.  Not RGB.  There's a converter out there called TMS-RGB that will do the proper conversion though, and then you get RGBC out that ought to work with this chip.

[thomas3120]

On 12/16/2021 at 4:45 AM, ChildOfCv said:

Not directly.  The 9928 outputs Y, R-Y and B-Y.  Not RGB.  There's a converter out there called TMS-RGB that will do the proper conversion though, and then you get RGBC out that ought to work with this chip.

Thanks for the reply,

I did some searching and found this:

MC13077 encoder  It has R-Y and B-Y inputs

Here's the datasheet 

 

MC13077P.pdf

[ChildOfCv]

21 minutes ago, thomas3120 said:

Thanks for the reply,

I did some searching and found this:

MC13077 encoder  It has R-Y and B-Y inputs

Here's the datasheet 

 

MC13077P.pdf 249.52 kB · 2 downloads

That chip only has composite or S-video outputs.  If you want composite out, you can already use one of the composite out mods for CV to use its LM1889.  This basically requires you to build the Motorola equivalent circuit for the same signal output.