ard at p850ug1.demon.co.uk
Sun Mar 11 20:19:24 CDT 2007
> > Are there many computers (apart from the BBC Micro!) that can do 9600
> > baud but not 110 baud? I ask merely for information.
> I am fairly sure I persuaded a beeb to do 110 once, for dial-up to a
> cetain university to play MUD.. I think it was as simple as changing a
> jumper over, but this was about 25 years ago and so i forget exactly
> which one.. It was certainly a non-permenant mod..
I wasn't aware of any such jumper... The baud rate generator in the Beeb
is inside the Serial ULA (the acutal serial chip is a 6850), and I didn't
think there was any way to get that to generate the appropratie output
I certainly remeber the fun a friend of mine had linking an ASR33 to his
Beeb, and he was enough of a hacker to know just about every jumper on
the board. Output was not a problem, you could bit-bang that using the
'break' signal, but there was no way to read the state of the RxD line
for input. We may well have ended up bit-baning it both ways using pins
on the user port.
> On 11/03/07, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> >  Maplin, the company, are still going, but their range of components
> > is a joke. They now mostly sell electornic toys, Lo-Fi, etc.
> Tell me about it... I cleaned out two stores this weekend to get
> enough 33uF 25V electrolytics for a repair I was doing... hardly
> exotic, I thought, but the total quantity between two stores? Five!
I've beem told that 1k resistors (that's the standard, 0.6W 1% resistors,
nothing exotic) are 'order only' components at some shops.
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