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- Apple II
- Technical Notes
- _____________________________________________________________________________
- Developer Technical Support
-
- ProDOS 8
- #24: BASIC.SYSTEM Revisions
-
- Revised by: Matt Deatherage September 1990
- Written by: Matt Deatherage July 1989
-
- This Technical Note documents the change history of BASIC.SYSTEM through
- V1.4.1, which ships with Apple IIgs System Software 5.0.3 and Apple II System
- Software 3.2. V1.0, the initial release, is not documented in this Note, and
- V1.1 is described in BASIC Programming with ProDOS.
- Changes since November 1989: Revised to include BASIC.SYSTEM 1.4.1.
- _____________________________________________________________________________
-
- V1.1
-
- o Fixed a bug in variable packing (used by CHAIN, STORE, and
- RESTORE).
- o Changed the interpreter to use the ProDOS startup convention of a
- JMP instruction followed by two $EE bytes and a startup pathname
- buffer.
- o Removed a bad buffer address in the FIELD parameter of the READ
- routine.
- o Fixed a bug in APPEND so calls to OPEN and READ from a random-
- access file would not cause the next call to APPEND to any file to
- use the record length of the random-access file.
- o Added the BYE command to allow ProDOS QUIT calls from BASIC.
- o Removed the limited support for run-time capabilities which had
- been present.
-
- V1.2
-
- o Changed the CATALOG command to ignore the number of entries in a
- directory when listing it so AppleShare volumes could be cataloged
- properly (this number can change on the fly on an AppleShare
- volume).
- o Fixed another bug in CATALOG so pressing an unexpected key when a
- catalog listing was paused with a Control-S would no longer abort
- the catalog.
-
- V1.3
-
- o Changed BSAVE so it now truncates the length of the saved file
- when the B parameter is not used. To replace the first part of a
- file without truncation, use the B parameter with a value of zero.
- This behavior with the B parameter is how V1.1 and V1.2 worked
- without the B parameter.
- o Fixed a bug in CHAIN and STORE where they expected one branch to
- go two ways at the same time.
- o Added the MTR command for easier access to the Monitor from BASIC.
- o Made internal changes to the assembly process for easier project
- management. These changes do not affect the code image.
-
- V1.4
-
- o Fixed a bug which caused a BLOAD into an address marked as used in
- the global page to start performing a BSAVE on the file instead of
- returning the NO BUFFERS AVAILABLE message. For this reason,
- BASIC.SYSTEM version 1.3 should not be used.
-
- V1.4.1
-
- o Fixed a bug in the mark handling routines. When using the "B"
- parameter to indicate a byte to use as a file mark, the third and
- most significant byte would never be reset before the next use of
- B. For example, if you used a B value of $010000 and then used a
- B value of $2345, BASIC.SYSTEM 1.4 would use $012345 for the
- second B parameter value.
-
-
- Further Reference
- _____________________________________________________________________________
- o BASIC Programming with ProDOS
- o ProDOS 8 Technical Reference Manual
-
-