Re: If I suddenly disappear...

Costing the net hundreds if not thousands of dollars, Richard Robinson
said:
> Guy King said:
> > from Richard Robinson <richardR@xxxxxxxxxxx> contains these words:
> >
> >> It lived happily ever after disguised as a phobile moan ?
> >
> > Yebbut why can't I get it for my PC? Could ti eb semotihng as smielp as
> > ykeabodsr dno't avhe the abitily to read that many keys down at a time?
>
> Very possibly.
>
> They do have _some_ ability to present you with more than 1 at the same
> time; viz. ye modifier keys. Shift, ctrl, etc. I don't know what level
> that's done at, how far down (and dirty) you'd have to get to be able
> to do that with "ordinary" keys. I've never seen an API that'd do it from
> any high-level language. I suppose the question would be how much timing
> info gets as far as the BIOS, or whether all those decisions are in
> the quibored itself ? I dunno, but I suspect it wouldn't be easy.
>
> Good grief. I just unforgot, I have the original blue-ringbinder IBM bios
> printout, somewhere. Or used to have. I can't have thrown it away, that'd
> be a serious blasphemy against The Mighty KumminHandhi.
>
> Attic somewhere, I guess.
>
>
>
iirc, at one time at least, on some platforms at least, keyboards were a
2d array of switches, and the machine scanned in both dimensions looking
for pressed keys. and the machine would wait until the full scan of the
board was done, see what it'd got, and decide what to do with it - in
the keyboard driver, which in Windows would be a .drv or .sys file. Only
after that would "what the computer has decided has been pressed" be
available to user apps to play with. So, for Guy's apps purposes, it
might be necessary to override the built-in keyboard driver: no doubt
it;s still possible to access the keyboard port directly, should you
need to.
--
Badger's arse to the west, put on your vest;
When to the north, rain shall come forth.
To the east it be, snow before tea;
If south it turn, the sun he will burn.
.

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