[chbot] Vintage computers show and tell...

[Synco Reynders]

Additional info:

Interview with Chris Turner
https://www.youtube.com/watch?v=GKHEsp8MYTM

And the very colourful now Sophie (Roger) Wilson
https://www.youtube.com/watch?v=nbNnNF9JHFQ
https://en.wikipedia.org/wiki/Sophie_Wilson

So Richard did you know Steve Furber?
Thinking an interview with Richard would make a nice addition to YouTube.
:-)
/s


On 28 September 2016 at 01:03, Andy ZL3AG <zl3ag at radioengineering.com>
wrote:

>
> That deserves an article written for theregister.co.uk !
>
> On 28/09/2016, at 12:39 AM, Richard Jones wrote:
>
> > Somewhere in the garage I have a circa 1978/79 verowire Visual Display
> pcb that I developed for Acorn Computers that was the marriage of the
> Motorola MC6845 CRTC and the Mullard SAA5050 Teletext character generator
> IC. Chris Turner and Roger Wilson at Acorn asked me to develop an 80
> character per line monochrome display for their Eurocard computer range and
> I offered to design them colour teletext display instead, which they
> accepted. Hermann Houser agreed to pay me with a 6502 CPU, and 8k RAM
> memory boards. The 6845 and SAA5050 combination became the heart of their
> BBC computer offering which won the BBC contract, possibly because of the
> assumed compatibility with over the air teletext. I used alternate half
> cycles of the 6809/6502 phi2 clock to allow the CPU transparent access to
> the memory mapped display ram while the character generator used the
> alternate half cycle for display access. Heady stuff for its day, given
> that at work I was using a teletype to print software listings and a hex
> keypad to enter programs in hand coded machine code for the National
> Semiconductor SC/MP.
> >
> > I'll see if I can find the board and bring it along to the next meeting.
> >
> > Richard Jones
> >
>
>
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