User`s guide

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From: Mitchell Spector
020- What advantages does the ROM 3 GS offer vs. the ROM-
01 GS?
The ROM 3 Apple IIgs offers many minor enhancements vs. the ROM-01 which
make the machine more functional and pleasant to use:
- You get a machine that is about 5-10% faster for GUI, floppy disk loading and
RAM Disk operations (due to updated smartport firmware and System 5 tools being
in ROM).
- A machine that is more flexible when working with AppleTalk and slots (you
don't have to give up an extra slot and you can stick a card in slot 4 and
still use the mouse in GS/OS).
- A nicer text Control Panel that lets you resize RAM Disk with a warm-boot and
a cleaner way to size it too (no min/max size junk). Also a 'Mouse' menu and
other existing things cleaned up and made better.
- A just over 1 megabyte of RAM built-in to start off with; so, you can have 5
MB of DMA compatible memory in total.
- The MB0 signal provided in slots 1 through 6, so you can stick in a Video
Overlay Card _and_ Second Sight in together, and not worry about having to
reserve slot 3.
- Hardware shadowing of text page 2 with Alternative Display Mode (no slowing
down your system to a crawl when you see a screen full of 2's running 8-bit
software).
- A newer ADB keyboard microcontroller with built-in sticky keys, keyboard
mouse and compatibility with the indicator LEDs on extended keyboards.
- A removable Lithum battery (in a snap case. Just pop the old one out when
your clock and Control Panel settings stop working).
- Less power consumption and electrical noise from the motherboard,
- A set of pins (location 'S1') on the motherboard to make the text Control
Panel disappear, making your GS settings tamper proof where young children are
around
There are even a couple of more goodies, like the Step/Trace commands in
Monitor or the improved disassembler. Even if you are not a programmer, they're
handy for peeking at SHR graphics still in memory (from Monitor hit 'S' and then
the return key).
Things like sticky keys and mouse keyboard come in handy too-- like if you
are eating or drinking with one hand, you can still reset the computer using the
other.