| From: | David McMinn |
| Date: | 14 Sep 99 at 16:46:48 |
| Subject: | Re: Mouse+Mouse = 2 Mice |
Hi Rob,
A quick flick through the ever-so-handy Blitz list archives on Aminet
and I found this stuff. This is just snipped from a message by Sami.
(It was in the February archive, thank god I guesses March to start
at I would have been there forever ;). I have no idea where the 3D
things came from, but it looks like you could just delete them.
-------------------
Well these are word addresses so you should read these as words!
joy0dat $dff00a port 0 (the one you normally stick your mouse)
joy1dat $dff00c port 1 (the joyjoy port ;)
So the reading will be done like this:
; a.w is temporary variable to store the input
x.b=3D0 ; current X counter value
y.b=3D0 ; current Y counter value
xx.b=3D0 ; previous X counter value
yy.b=3D0 ; previous Y counter value
mx.w=3D0 ; pointer X cordinate
my.w=3D0 ; pointer Y cordinate
a.w=3Dpoke.w($dff00a)
x.b=3D(a lsr 8)&$ff
y.b=3Da&$ff
if x.b<>xx.b
temp.b=3Dxx.b
x.b-xx.b
xx.b=3Dtemp.b
mx.w+x.b
endif
if y.b<>yy.b
temp.b=3Dyy.b
y.b-yy.b
yy.b=3Dtemp.b
my.w+y.b
endif
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