12 Sep
2002
12 Sep
'02
4:23 a.m.
Tony Duell wrote:
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(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
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.