Apple IIe Workstation Card Anomalies
Written by Dan Strnad (July 1989)
This Technical Note describes known anomalies when using the Apple IIe
- 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.
- 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.
- AppleShare Programmer's Guide for the Apple IIGS
- Apple IIe Technical Reference Manual
This and all of the other Apple II Technical Notes have been converted
to HTML by Aaron Heiss as a public service to the Apple II community, with
permission by Apple Computer, Inc. Any and all trademarks, registered and
otherwise, are properties of their owners.