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- Apple II
- Technical Notes
- _____________________________________________________________________________
- Developer Technical Support
-
- Pascal
- #17: SYSTEM.APPLE Patch V2.0
-
- Revised by: Dan Strnad March 1990
- Written by: Dan Strnad May 1988
-
- This Technical Note documents the Apple Pascal SYSTEM.APPLE patch version 2.0
- (available as part of the Apple Pascal 1.3 package from APDA), which fixes two
- Pascal system bugs found in the 64K and 128K, regular and run-time, version
- 1.2 and 1.3 Pascal systems. A companion program confirms the correct
- installation of these patches.
- _____________________________________________________________________________
-
- SYSTEM.APPLE patch 2.0 corrects the following two bugs:
-
- 1. UNITSTATUS calls to device numbers six, seven, and eight
- malfunction in Apple II Pascal 1.3.
- 2. On Apple IIGS machines, disk access to 5.25" drives may fail under
- Apple II Pascal.
-
- The following limitations exist with these patches:
-
- 1. Keyboard input from an external terminal does not work; however,
- SYSTEM.APPLE patch 1.0 is also available to support external
- terminals. SYSTEM.APPLE patch 1.0 fixes only the UNITSTATUS
- problem; it does not address the 5.25" drive problem on the Apple IIGS.
-
- 2. Type-ahead buffering may drop keystrokes under the following
- circumstances:
- a. On an Apple IIGS if the user has enabled keyboard
- buffering from the Control Panel.
- b. On an Apple IIc series computer, if an Apple II Pascal
- program directly accesses the firmware-level keyboard
- buffering.
-
- Apple II Pascal 1.3 (and 1.2) still provide type-ahead keystroke buffering on
- all Apple IIs.
-
- To use the patch program, X)ecute it from Pascal with the name PATCH. To
- confirm the proper installation of the patch, perform an X)ecute with the name
- CONFIRM.
-
-