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- Item 6423494 11-Oct-88 05:59
-
- From: A33 Drexel U, Nadine Perkey, ASC
-
- To: MACAPP.TECH$ MACAPP Tech
- MACAPP.NEWS$ MACAPP News
-
- cc: A33 Drexel U, Nadine Perkey, ASC
-
- Sub: MultiFinder Problem?
-
- MacApp and MultiFinder
-
- We believe we have discovered a serious incompatibility between MacApp 1.1.1
- and MultiFinder.
-
- The problem is this:
- MacApp installs a task that turns the normal arrow cursor into a watch cursor.
- The timer that controls when the cursor changes is set via a patch to the
- GetNextEvent and EventAvail calls. The problem arises when an application that
- uses the MacApp library is run under MultiFinder. The task doing the cursor
- switch apparently makes a reference to A5. During a switch, if interrupts have
- not been turned off, A5 may not be valid for that task: Using an invalid A5
- will cause the machine to hang. This does not occur with system 6.01/02, since
- interrupts are turned off during switches in this system.
-
- What we want to know is what would be an approved workaround and couldthis
- problem be in MacApp 2.0?
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