User`s guide

A $0201 error when switching to ProDOS-8 usually means some utility has
left part of bank 0 or bank 1 allocated. You have enough memory free, but some
particular memory that ProDOS 8 needs is not available.
I have seen occasional $0201's after using Find File 1.0 (included with
6.0) before switching to ProDOS-8. --Dave Lyons
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O512 (FATAL SYSTEM ERROR 0512) "badNdaTitleString"-- comes from FixAppleMenu (in
the Desk Manager). It means that one of your installed New Desk Accessories
does not have a well-formed menu title string. In particular, the required
backslash (\) character was not found (make sure bit seven is off). --IIgs
TechNotes
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0681 and 0682 "bad event que" and "bad que handler"-- What do these error codes
mean? How does the GS determine if an error is FATAL (as in FATAL SYSTEM
ERROR)???
The errors are 'Event Manager errors'. A key press and mouse button press
are examples of "events". The errors indicate a record of events was messed up.
One of many places this might occur is while you are typing-in text. "FATAL"
usually means that System believes that things are so messed up in memory that
restarting is necessary. Sometimes, "FATAL" means that System suspects that
there may be a hardware failure. --Rubywand
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0682 "bad que handler"-- My IIgs crashes with a Fatal Error $0682 whenever I
have my expansion memory card plugged in and try to access the Control Panel.
Also the Alternate Display mode seems to be missing and stuff won't boot. What's
wrong?
Error $0682 indicates a data structure maintained by the Event Manager is
corrupted. It is either the Event Queue itself, or something related to it. The
most common cause for this is buggy software which has overwritten memory.
The second most common cause is a faulty or incorrectly configured memory
expansion card (or bad RAM on that card). The event queue normally lives near
the top of "fast" memory, so it is always located in the memory expansion card
if you have one.
Similarly, the list of items in the Desk Accessories menu is in RAM, so
lack of Alternate Display Mode points to memory corruption of some kind. --
David Empson
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08FF "UNCLAIMED SOUND INTERRUPT"-- A sound interrupt has occurred but none of
the available interrupt handlers were willing to deal with it. The Sound tool
set thinks this is pretty serious; so, it notifies the System Failure Manager
and you get the error message. A possible cause is that the table of interrupt
vectors or the pointer to the table has been messed up in memory. --Rubywand
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