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Apple II
Technical Notes
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Developer Technical Support
AppleTalk
#6: Apple IIe Workstation Card Anomalies
Written by: Dan Strnad July 1989
This Technical Note describes known anomalies when using the Apple IIe
Workstation Card.
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o Pascal Protocol Serial STATUS call returns incorrect results.
When using the Workstation card, the Pascal STATUS call (normally
used for printing) does not properly indicate whether the card is
ready to receive characters. Applications should avoid this call, as
the Pascal WRITE call in the firmware will perform this function
automatically.
o ProDOS 8 invisible bit is not respected.
The invisible bit in the ProDOS 8 access byte was defined after the
release of the Apple IIe Workstation Card, so the ProDOS Filing
Interface present on the card treats this bit as reserved.
Further Reference
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o AppleShare Programmer's Guide for the Apple IIGS
o Apple IIe Technical Reference Manual