The System in the Machine



Author: Tonya Byard, TidBits

Date: January , 1991

Keywords: booting Classic ROM hints tips

Text:
As you may already know, the Classic will boot from a ROM disk if you
perform the dextrous feat of holding down the command-option-x-o (XO
was the Classic's code name) keys during startup. This 357K internal
disk has the same icon as the Mac Portable's RAM disk-a SIMM-like item
interposed on top of a picture of a 3.5" floppy disk.
Double-clicking the ROM disk icon opens a window, which contains nine
file icons: System 6.0.3; Finder 6.0; General 6.0.3; Macsbug 5.3 (for
Mac 512KE-SE according to the GetInfo Box); StartUp Device 6.0.3 (which
you can use to make the ROM disk the default startup device, though it
won't override a floppy disk); AppleShare 6.0.3; Brightness 1.0d2 (a
new cdev introduced with the Classic-the Classic has no external
brightness knob-the cdev looks much like the brightness control section
of the Portable cdev.); and AppleShare Prep (version not available).
All of these programs were last modified in the past four years, with
the exception of the Finder, which was last modified on December 11,
1967.
I wondered if I could use the ROM system to boot up a different Mac, so
I tried copying it to a floppy disk. The copy went fine (though when I
tried to boot a IIcx, the computer complained that the system was too
minimal for it), but as I watched the copy dialog box on the Classic I
noticed the Classic claiming that it was copying 26 files. Funny, I
only saw nine icons.
Not yet being particularly competent with ResEdit, I used the Font/DA
Mover to take a closer look-just one font installed, Monaco. No DAs
whatsoever, not even a Control Panel for access to the Brightness cdev.
But, if I tried opening files in the ROM disk to bring them up in the
Font/DA Mover, I discovered two choices: System and a folder called
''Brought to you by.'' ''Brought to you by'' had five folders in it:
three empty folders having the names of various people, a ''Hardware''
folder, and a ''Software'' folder. The ''Hardware'' folder contained
six empty folders, and each sported one of six more names; the
''Software'' folder contained five empty folders, and each sported one
of five more names. I didn't record the names, so check them out
yourself if you are curious.
Add all these folders to the nine original files and you have the 26
that the Classic identified in its Copy dialog box, which explains that
little anomaly. Nothing like a little mystery to add some interest to
the daily grind.
After these internal explorations, I opened a word processor to check
out Monaco. It looked pretty tiny, but Monaco 12, though not my
favorite font, looked usable. Many people think the ROM disk will be
used in some future network configuration, but it might also provide a
tiny bit more flexibility for the occasional person who can afford a
Classic but can't afford a hard disk or external floppy. 
In addition to future enhanced networking capabilities, I would like to
see Apple add some font and printing capabilities (either by adding
them to the ROM, or by adding some kind of hook from ROM to disk so
that Chooser Documents and fonts could be stored on floppy (or on a
network) but still interact properly with the System). At that point,
hordes of people who are sure they will use a Mac only for basic
computer activities could start out with a sub-$1000 computer (most
programs will fit on a 1.44 MB floppy), and then add a hard disk six
months later if they want a more flexible system.
For those of you that prefer more graphic goodies than ROM disks, try
setting the date of a IIci to 9/20/89 (the introduction date) and
booting it while holding down command-option-c-i. A similar trick
produces something different on the IIfx; on the fx you set the date to
3/19/90 and hold down command-option-f-x while booting.

Copyright © january , 1991 by Tonya Byard, TidBits