Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!mcnc!rti!sunpix!matthew
From: matthew@sunpix.UUCP ( Sun Visualization Products)
Newsgroups: comp.sys.apple
Subject: Re: 1979 Graphics Tablet software
Keywords: DOS 3.2, keyboard buffer, RAM card interference
Message-ID: <611@greens.UUCP>
Date: 14 May 89 01:45:26 GMT
References: <2268@wpi.wpi.edu>
Organization: Sun Microsystems, Research Triangle Park, NC
Lines: 38


[a *lot* of text about Apple Graphics Tablet software deleted]


>Nothing was loaded/poked into here.  I vaguely remember that DOS 3.2 partially
>bootstrapped into this section of memory...but I thought it was closer to
>$300. 

Yes, just as ProDOS and DOS 3.3 load the first block of code off the disk into
$0800, DOS 3.2 put it at $0300.

At the switch from DOS 3.2 to DOS 3.3, Apple changed the code in the boot rom
to read sector 0 / track 0 of a 16 sector diskette, vice sector 0 / track 0 of
a 13 sector diskette (this is one reason you can't boot the disk on your 
Apple //gs).

When Apple made the change, they also came out with a little program called 
'BOOT13', to permit DOS 3.3 users to boot DOS 3.2 disks.  This program was
distributed on the original DOS 3.3 users disk.  If you can get a hold of this
program, you should be able to boot Apple Graphics Tablet software disk on your 
Apple //gs.

Another avenue you might want to try, is a program that NIBBLE published 
several years ago, that reformatted track 0 on a DOS 3.2 disk, placing two
Sector 0's on the disk.  One of them was the DOS 3.2 readable one, the other
was a DOS 3.3 readable block containing an altered copy of the DOS 3.2 boot
rom. 

I'd post the code, but they are both copyrighted works.  Hound Apple for the
BOOT13 program, and the NIBBLE program can probably still be purchased through 
their "in the back of the magazine" catalogs.


-- 
Matthew Lee Stier                         |
Sun Microsystems ---  RTP, NC  27709-3447 |        "Wisconsin   Escapee"
uucp: { sun, mcnc!rti }!sunpix!matthew    |
phone: (919) 469-8300 fax: (919) 460-8355 |