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This commit is contained in:
Denis Molony 2016-11-17 14:23:14 +11:00
parent 73adafbdb0
commit f833c74781
1 changed files with 37 additions and 7 deletions
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34
src/com/bytezone/diskbrowser/dos/DosDisk.java
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@ -362,8 +362,7 @@ public class DosDisk extends AbstractFormattedDisk
text.append (line);
text.append (String.format (
" Free sectors: %3d "
+ "Used sectors: %3d Total sectors: %3d",
" Free sectors: %3d " + "Used sectors: %3d Total sectors: %3d",
dosVTOCSector.freeSectors, dosVTOCSector.usedSectors,
(dosVTOCSector.freeSectors + dosVTOCSector.usedSectors)));
if (dosVTOCSector.freeSectors != freeSectors)
@ -385,4 +384,35 @@ public class DosDisk extends AbstractFormattedDisk
return new DefaultAppleFileSource ("Deleted files", text.toString (), this);
}
/* From http://apple2history.org/history/ah15/
*
There were actually three versions of DOS 3.3 that Apple released without
bumping the version number:
The first version that was released had FPBASIC and INTBASIC files that were 50
sectors in size.
The second version of DOS 3.3, often referred to as “DOS 3.3e”, appeared at the
time the Apple IIe was released. In this version, the FPBASIC and INTBASIC files
were 42 sectors in size. The changes introduced at that time included code to turn
off the IIe 80-column card at boot time, and an attempt to fix a bug in the APPEND
command. This fix reportedly introduced an even worse bug, but as the command was
not heavily used it did not make much of an impact on most programmers. The APPEND
fix was applied by utilizing some formerly unused space in the DOS 3.3 code.
The third version of DOS 3.3 appeared just before the first release of ProDOS.
The only mention of this in the press was in the DOSTalk column of Softalk magazine.
This final version of DOS 3.3 included a different fix for the APPEND bug, using
another bit of unused space in DOS 3.3.
With regard to the FPBASIC and INTBASIC files: There were three differences between
the 50 sector and the 42 sector versions of the INTBASIC file. Firstly, the
$F800-$FFFF section was removed. This area was the code for the Monitor, and with
the changes introduced in the Apple IIe, it could cause some things to “break” if
the older Monitor code was executed. Secondly, a FOR/NEXT bug in Integer BASIC was
fixed. Finally, there was a three-byte bug in the Programmer’s Aid ROM #1 chip.
The code for this chip was included in the INTBASIC file, and could therefore be
patched.
*/
}