Tony Duell wrote:
> Texas CFxxxx numbers tend to be custom ASICs :-(. No chance of
> getting a data sheet on those.
*ACK.
> What also bothers me is the lack of RAM. The Philips decoder uses the
> SAA5231 VIP (Video Input Processor -- this is essentially the 'data
> slicer' and is mostly analouge), the SAA5243 Teletext decoder/display
> chip _and an 8K RAM_.
There are Philips chips with built-in RAM, though. SAA5246 IIRC.
>> Anyone got a Ferguson T14T or Thomson TX91 service manual? I need
>> the part
> It's a bit modern for me :-(. However, a TV service manual is _not_
> going to include any info on the commands that flow between various
> ICs. You will not get a list of registers on the I2C bus and their
> contents, for example.
The thing that seems interesting is that the TTX controller IDs it as an
SAA52xx series TTX controller. The original schematic that I had (a VERY bad
scan) listed the TTX controller as an SAA-something-or-other. Shame the scan
was so bad. I'm not sure the chassis was TX91 anyway - it might have been
TX90. Same thing. Ferguson=Thomson, T14T=TX9-something.
Later.
--
Phil.
philpem_at_dsl.pipex.com
http://www.philpem.dsl.pipex.com/
Received on Thu Sep 12 2002 - 11:23:28 BST