Re: A86: Key Presses
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Re: A86: Key Presses
_getcsc = _get_key = $4068
Cassady Roop
Bryan Kam wrote:
>
> Thanks for responding. What should I define _getcsc as? I couldn't find it
> on the list in Assembly Studio (btw, is that the best thing to be using?)
>
> Also, would you add a jr z,Exit after the cp K_EXIT?
>
> When I try to compile I also get undefined errors for all the K_ statements.
> Should I use kAdd, kSub, and kExit or am I doing something wrong?
>
> -----Original Message-----
> From: owner-assembly-86@lists.ticalc.org
> [mailto:owner-assembly-86@lists.ticalc.org]On Behalf Of
> ComAsYuAre@aol.com
> Sent: Saturday, December 04, 1999 1:53 PM
> To: assembly-86@lists.ticalc.org
> Subject: Re: A86: Key Presses
>
> If you don't want to read more than one key "at the same time", using
> _getcsc
> (same as _getky or _get_key) is much easier than the ports.
>
> Waitkey:
> call _getcsc ;get keypress in a
> cp K_PLUS
> jr z,ContrastUp
> cp K_MINUS
> jr z,ContrastDown
> cp K_EXIT
> jr nz,Waitkey
>
> In a message dated 12/4/99 16:48:55 Eastern Standard Time, bryan_kam@usa.net
> writes:
>
> > I'm a newbie at this and I'm having trouble reading multiple
> keypresses.
> > I am reading the presses by writing to port 1 and reading from port 1 and
> I
> > can read one key just fine, but I've heard that one can read more than
> one
> > key press with the ports, but I am unsure how to do this. Is reading the
> > port the best way to do this or is _getky or _getkey better? I'm trying
> to
> > let them press +, -, or exit. Here's my code:
> >
> > Getkeypress:
> > ld a,%01111101
> > out (1),a
> > nop
> > nop
> > in a,(1)
> > bit 1,a
> > jr nz, Getkeypress
> >
> > After that code it goes on to something that will change the contrast
> > up, but I want to know how to make little routines for inc-ing the
> contrast,
> > dec-ing the contrast, and ret-ing to the OS.
> > Am I making sense?
>
> ----
> Jonah Cohen
> <ComAsYuAre@aol.com>
> http://linux.hypnotic.org/~jonah/
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