29 May
1997
29 May
'97
1:18 p.m.
Still no joy on the Apple II+ boot problem.
The machine appears to definitely have 48K RAM; at least the NEC chips
have "416" on them. Any way I can tell in BASIC?
I have 3 disk controllers and 3 drives. The disk controllers have 2
different ROM versions; one is half copyrighted 1979 and half 1981,
while the other is all 1981. The card model is 650-X104. There's
another ID number, one is 820-0006-02 and the other card is 820-0006-D.
Help!!!!
Kai
----------
From: Eric Fischer[SMTP:eric@fudge.uchicago.edu]
Reply To: classiccmp(a)u.washington.edu
Sent: Tuesday, May 27, 1997 10:02 AM
To: Discussion re-collecting of classic computers
Subject: Re: HELP with Apple II+ booting!
kaikal(a)MICROSOFT.com says,
My Apple II+ will boot a diskette called the
"Zardax Utilities" but
it
won't boot anything else.
...
When I put in a different bootable diskette, I
get "APPLE II" on the
screen, and then after a moment's pause, a bunch of garbage
characters
are added.
My best guess is that maybe you have a 13-sector (DOS 3.2) disk
controller and one 13-sector disk (the one that works), and the
rest of your disks are 16-sector so the 13-sector controller
doesn't know what to do with them. Unfortunately I can't remember
where to peek to find out the DOS or controller version number,
so I don't know how you could verify this.
The other alternative is that if your Apple II+ has less than 48k
of memory, the other disks may be expecting a 48k system and loading
DOS into a part of memory that doesn't exist on your computer. The
Zardax Utilities disk may be one with a relocatable DOS image on it
(a "master" disk) created with "MASTER CREATE" and the rest are just
plain fixed-address disks. This would certainly explain why random
junk was getting loaded into video memory instead of where it belongs.
eric