> -----Original Message-----
> From: tony
> Sent: 19 November 2001 16:46
> To: ql-users
> Cc: tony
> Subject: Re: [ql-users] Q40/Q60 keyboard interface
> We developed sH on a breadboard which sounds just like your set up/
> It took many many months to tame the keyboard.
>
It all started for me when I got my first 'computer' - a Mk.14. Now
there's a piece of Sinclair nostalgia. Mine wouldn't work because the
PCB left the interrupt (level triggered active high) floating, with
interrupts enabled by the monitor program. Took ages to figure out
what was going on. It was a magazine article that explained you needed
to wire the interrupt pin to 0V that eventually got that sorted.
I recently got my hands on another SC/MP chip - next project is to
build something around that.
Ian.
>
>
> On Mon, 19 Nov 2001 at 10:09:54, wrote:
> (ref: <H0000b5f118b16c6.1006164593.ln4p1327.ldn.swissbank.com@MHS>)
>
> >Thanks Peter, useful and detailed information. I'd been
> playing around
> >with homebuilt 8-bit micro projects (which usually resembled
> a cluster
> >of ICs buried under heaps of spaghetti-wiring on stripboard :o) which
> >amazingly, usually worked, but never managed to connect a PC keyboard
> >to one of them. Sounds a bit more complicated than I thought it
> >might've been, with those timing issues!
> We developed sH on a breadboard which sounds just like your set up/
> It took many many months to tame the keyboard.
>
>
>
>
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