Date : Thu, 30 Jul 2015 23:41:53 +1000
From : mark@... (Mark Ashley)
Subject: Glorious DVI
I was thinking more along the lines of seeing which character was at what
location in the 1KB screen buffer and then emitting that out, not getting
involved with scanning the video at all. A reverse teletext adaptor,
reading from the Beeb and displaying instead of feeding to it.
https://en.wikipedia.org/wiki/Mullard_SAA5050
Mike might have insights into it with his Mode 7 FPGA work...
http://www.mike-stirling.com/retro-fpga/bbc-micro-on-an-fpga/
On Thu, Jul 30, 2015@... PM, J.G.Harston <jgh@...> wrote:
> Mark Ashley wrote:
> > First thing that occurred to me is would it be simpler to just emulate
> > Mode 7 teletext, linking the chip to the FPGA at the TTL level and
> > directly outputting the DVI?
>
> Unless I'm barking up the wrong tree, the convertor would need to
> somehow recognise the incoming RGB pixel patterns and convert them into
> the teletext characters they represent in order to then output the DVI
> pixel patterns of those teletext characters.
>
> --
> J.G.Harston - jgh@... - mdfs.net/jgh
>
>
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