Path: utzoo!mnetor!uunet!husc6!bloom-beacon!mit-eddie!killer!jockc
From: jockc@killer.UUCP (Jock Cooper)
Newsgroups: comp.sys.apple
Subject: Re: Two questions...
Message-ID: <3995@killer.UUCP>
Date: 5 May 88 23:27:40 GMT
References: <5128@bloom-beacon.MIT.EDU>
Reply-To: jockc@killer.UUCP (Jock Cooper)
Organization: The Unix(R) Connection BBS, Dallas, Tx
Lines: 28

In article <5128@bloom-beacon.MIT.EDU> mhamaoka@athena.mit.edu (Michael T Hamaoka) writes:
>   1.  Does anyone out there know how to write an assembly language random 
>       number routine?  Or does anyone have a disassembly of the RND command 
>       or the memory location where it starts?

If you are using a GS you can use the _Random toolbox call (if quickdraw has 
been initialized). Also the SANE toolbox has a random function that is 
described in the Apple Numerics Tech Ref Manual.  If you cannot make these
toolbox calls, it shouldn't be too hard to find a random number algorithm
somewhere and implement in assy...
If you are using a //e or //+, you might try looking at the locations that
the keyboard input routines increment while waiting for input ($46 and $47 I
think)..  This method would work only if you were using those routines for 
input.  The 16-bit number contained in those locations should be relatively
random if keyboard input has taken place.  The number will change each time
you call the system keyboard input routine.

>
>   2.  Is there a GIF viewer for the Apple IIgs that takes advantage of
>       the GS graphics?

Yes, the program is called SHRConvert.  It is shareware and is pretty widely 
available.  Loading GIFs is kind of slow but usable.  It loads/converts many
other formats as well.

jockc

ihnp4!killer!jockc