A86: Re: Key input
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A86: Re: Key input
how about direct input? it is the fastest and only way as far as I know..
here is an ex:
ld a,0ffh ;Reset keyport
out (1),a ;Clear Port
ld a,0feh ;Load desired port
out (1),a ;Clear Keys
in a,(1) ;Input Key
cp 251 ;If key is right
jp z,GunRight ;Goto Right
cp 253 ;If key is left
jp z,GunLeft ;Goto Left
cp 247 ;Is it key Up
jp z,GunUp ;Move Up
cp 254 ;Is it Down
jp z,GunDown ;Move Down
ld a,0ffh ;Reset keyport
out (1),a ;Clear Port
ld a,0bfh ;Load desired port
out (1),a ;Clear Keys
in a,(1) ;Input Key
cp 223 ;Is it 2nd
jp z,shoot ;Shoot if so
cp 127 ;Is it delete
jp z,QuickPause ;Pause
cp 191 ;Is it Exit [Note - would result in Key Mode on 83]
ret z ;Return from Program if so
jp nz,NoKey ;NoKey Otherwise
--From DuckHunt
Hope this helps...
Ahmed
-----Original Message-----
From: BIOSERRORS <BIOSERRORS@aol.com>
To: assembly-86@lists.ticalc.org <assembly-86@lists.ticalc.org>
Date: Saturday, May 16, 1998 11:48 PM
Subject: A86: Key input
>
>What's the best way to read simultaneous key presses? Especially,
down+left
>at the same time. I know how to read directly from the port, but I don't
know
>how to read more than one keypress at a time.
>
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