Apple II
Technical Notes
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                                                  Developer Technical Support


Mouse
#5:    Check on Mouse Firmware Card

Revised by:    Matt Deatherage                                  November 1988
Revised by:    Rilla Reynolds                                   November 1985

This Technical Note formerly described a protocol which allowed applications 
to check a device which matched the mouse firmware identification for support 
of interrupts.
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The convention formerly described by this Note has been removed since it 
conflicted with the Pascal 1.1 Firmware Protocol.  The conflict could cause 
Pascal to believe that optional firmware routines were present, when the card 
being checked was simply stating that it supported interrupts.

Apple recommends that any mouse-type device which matches the mouse ID bytes 
should support interrupts exactly as the Apple mouse firmware does.  
Applications which believe they have found an Apple mouse have a reasonable 
right to expect that the device they actually have found will behave as an 
Apple mouse.

