Apple II DOS 3.3 BASICS

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Apple II DOS was a family of disk operating systems for the Apple II series. In August 1980, Apple released an upgrade for DOS 3.3. consisting of a new System Master disk and a hardware upgrade chip.
The original disk drive had been designed with the ability to read and write 35 tracks of 13 sectors each on a 5.25 inch disk. At 256 bytes possible per sector, this made the disk capable of holding 113.75Kb of information. Since it was designed to have DOS present on each disk in the first three tracks, and the catalog took up another entire track, there was actually only 100.75Kb available for data storage. Steve Wozniak, the author of the original DOS disk driver (RWTS), had found a way to increase the storage capacity of Apple floppy disks to 16 sectors per track, resulting in a disk that could now hold a maximum of 140K of data (124K excluding DOS and the catalog track), a 23 percent increase. The great thing about this upgrade was that the disk drives themselves did not need to be changed to make this possible. Only the ROM program on the Disk II controller card needed to be changed to make the move to DOS 3.3.
This separate disk called  DOS 3.3 BASICS was included that could be used in the same way as a pre-boot for 13 sector disks.

Platform: Apple II, II+, IIe  48Kb RAM 

               OS: Apple DOS 3.3              

System Software (SS:) Apple DOS 3.3

Version: 3.3



Platform : Apple II
Format : Disk 5.25
Publisher : Apple
Authors :
Date : 1980
Product Code :

Related Items in the Collection:

Other Software by Apple:

Item Manufacturer Platform Format Date
Color Demosoft / Little Brickout Apple Apple II Cassette 1979
Alignment Test Tone / Renumber / Append Apple Apple II Cassette 1979
Penny Arcade / Finance 1 Apple Apple II Cassette 1979
Apple Post Mailing List System Apple Apple II Disk 5.25 1979
Hand-Holding BASIC Apple Apple II Disk 5.25 1980
Apple II DOS 3.3 BASICS Apple Apple II Disk 5.25 1980
Apple PILOT Apple Apple II Disk 5.25 1980
Apple II Application Software - Set of Disks Apple Apple II Disk 5.25 1981
Apple III Visicalc III Apple Apple III Disk 5.25 1981
Apple III Apple Business BASIC Apple Apple III Disk 5.25 1981
Apple III Universal Parallel Interface Card Driver Software Apple Apple III Disk 5.25 1981
Apple III Apple II Emulation Integer & Applesoft BASIC Apple Apple III Disk 5.25 1981
Apple III Visicalc III Apple Apple III Disk 5.25 1981
Apple III Apple Access III Apple Apple III Disk 5.25 1981
Apple III Mail List Manager Apple Apple III Disk 5.25 1981
Apple II DOS 3.3 Apple Apple II Disk 5.25 1982
Apple II Monitor ROM Listings Apple Apple II ROM 1982
Apple II ProDOS Apple Apple II Disk 5.25 1982
Apple III Apple Writer III Apple Apple III Disk 5.25 1982
Apple III Apple Writer III Apple Apple III Disk 5.25 1982
Apple III Quick File III Apple Apple III Disk 5.25 1982
Apple Lisa 7/7 Office System Apple Apple Lisa` Disk 3.5 1983
Apple II DOS User's Manual Apple Apple II Wire Bound Paperback 1983
Apple III System Software SOS Apple Apple III Disk 5.25 1983
Apple III Apple Writer III Apple Apple III Disk 5.25 1983
Apple III Backup III Apple Apple III Disk 5.25 1983
Apple II The Inside Story - An Introduction Apple Apple II Disk 5.25 1984
Appleworks IIe Apple Apple II Disk 5.25 1984
Apple II Applesoft Programmer's Kit Apple Apple II Disk 5.25 1984
Macintosh System MacWrite MacPaint Apple Apple Mac Compact Disk 3.5 1984
ProDOS BASIC Apple Apple II Disk 5.25 1984
Icon Art Master Pineapple Software BBC Micro 5.25 Inch Disk 1985
Macintosh XL MacWorks XL MacWrite MacPaint Apple Apple Mac Compact Disk 3.5 1985
Apple II MouseDesk 2.0 Apple Apple II Disk 3.5 1986
Macintosh Plus Apple Apple Mac Compact Disk 3.5 1986
P.C.B. Pineapple Software BBC Micro 5.25 Disk 1986
Apple II DOS 3.3 - Set of Disks Apple Apple II Disk 5.25 1987
Apple HyperCard Apple Apple Mac Compact Disk 3.5 1987
Macintosh HyperCard 1.0 Apple Apple Mac Compact Disk 3.5 1987
Diagram II Pineapple Software BBC Micro 5.25 Disk 1988
Learn To Use HyperCard 1: Beginning HyperCard Apple Apple Mac Compact Disk 3.5 1989
Learn To Use HyperCard 2: Scripting with HyperTalk Apple Apple Mac Compact Disk 3.5 1989
Macintosh System 7 Personal Upgrade Apple Apple Power Macintosh Disk 3.5 1991
Quicktime 1.5 Apple Apple Power Macintosh CD-ROM 1992
The Virtual Museum Apple Apple Macintosh Centris/Quadra CD-ROM 1992
Apple Media Tool Apple Apple Mac Compact CD-ROM 1993
SADE v. 1.3.3 Apple Apple Mac Compact Disk 3.5 1993
Multimedia in Action Apple Apple Mac Compact CD-ROM Nov 1993
Mac OS System 7.5 Apple Apple PowerBook Disk 3.5 1994
Apple Reference, Performance & Learning Expert. Supplement, January 1994. (missing) Apple Apple Macintosh Performa CD-ROM Jan 1994
Apple Reference, Performance & Learning Expert. Partner Edition, April 1994. Apple Apple Macintosh Performa CD-ROM Apr 1994
Apple Reference, Performance & Learning Expert. Special Edition Power Macintosh, May 1994. Apple Apple Macintosh Performa CD-ROM May 1994
Apple Reference, Performance & Learning Expert. Partner Edition, July 1994. Apple Apple Macintosh Performa CD-ROM Jul 1994
Apple Reference, Performance & Learning Expert. Supplement, September 1994. Apple Apple Macintosh Performa CD-ROM Sep 1994
Apple Reference, Performance & Learning Expert. Provider Edition, October 1994. Apple Apple Macintosh Performa CD-ROM Oct 1994
Apple Reference, Performance & Learning Expert. Special Edition Power Macintosh Version 2.0, November 1994. Apple Apple Macintosh Performa CD-ROM Nov 1994
Inside Macintosh Apple Apple Power Macintosh CD-ROM 1995
Apple Reference, Performance & Learning Expert. Partner Edition, January 1995. Apple Apple Macintosh Performa CD-ROM Jan 1995
Apple Reference, Performance & Learning Expert. Supplement, February 1995. Apple Apple Macintosh Performa CD-ROM Feb 1995
Apple Reference, Performance & Learning Expert. Provider Supplement, March 1995. Apple Apple Macintosh Performa CD-ROM Mar 1995
Apple Reference, Performance & Learning Expert. Provider Edition, April 1995. (case only) Apple Apple Macintosh Performa CD-ROM Apr 1995
Apple Reference, Performance & Learning Expert. Provider Edition, May 1995. Apple Apple Macintosh Performa CD-ROM May 1995
Apple Reference, Performance & Learning Expert. Provider Edition, June 1995. Apple Apple Macintosh Performa CD-ROM Jun 1995
Apple Reference, Performance & Learning Expert. Provider Edition, July 1995. Apple Apple Macintosh Performa CD-ROM Jul 1995
Apple Marketing MediaAlbum CD-ROM Collection Apple Apple Power Macintosh CD-ROM 1996
Apple Computer Europe Macintosh Performa In-store Demo Apple Apple Macintosh Performa CD-ROM 1996
Mac OS System 7.6 Apple Apple Power Macintosh CD-ROM 1996
Apple Reference, Performance & Learning Expert. Provider Edition, Sptember 1996. Apple Apple Macintosh Performa CD-ROM Sep 1996
Apple Reference, Performance & Learning Expert. Provider Edition, October 1996. Apple Apple Macintosh Performa CD-ROM Oct 1996
Apple Reference, Performance & Learning Expert. Provider Edition, November 1996 (case only) Apple Apple Macintosh Performa CD-ROM Nov 1996
Apple Computer Europe Consumer In-store Demo Spring 1997 Apple Apple Power Macintosh CD-ROM 1997
Apple Reference, Performance & Learning Expert. Provider Edition, January 1997. Apple Apple Macintosh Performa CD-ROM Jan 1997
Apple Reference, Performance & Learning Expert. Provider Edition, February 1997. Apple Apple Macintosh Performa CD-ROM Feb 1997
Apple Reference, Performance & Learning Expert. Provider Edition, March 1997. Apple Apple Macintosh Performa CD-ROM Mar 1997
Apple Service Source CD 2.0 March 1997 Apple Apple Macintosh Performa CD-ROM Mar 1997
Apple Reference, Performance & Learning Expert. Provider Edition, May 1997. Apple Apple Macintosh Performa CD-ROM May 1997
Apple Reference, Performance & Learning Expert. Provider Edition, June 1997. Apple Apple Macintosh Performa CD-ROM Jun 1997
Apple Reference, Performance & Learning Expert. Provider Edition, July 1997. Apple Apple Macintosh Performa CD-ROM Jul 1997
Apple Reference, Performance & Learning Expert. Provider Edition, August 1997. Apple Apple Macintosh Performa CD-ROM Aug 1997
Apple Reference, Performance & Learning Expert. Provider Edition, October 1997. Apple Apple Macintosh Performa CD-ROM Oct 1997
Apple Reference, Performance & Learning Expert. Provider Edition, November 1997. Apple Apple Macintosh Performa CD-ROM Nov 1997
Apple Dealer CDs and DVDs, 1990s Apple Apple Power Macintosh CD-ROM 1998
QuickTime Attract Loop Apple Apple Power Macintosh CD-ROM 1998
Apple Display Software Apple Apple Power Macintosh CD-ROM 1998
Apple Reference, Performance & Learning Expert. Provider Edition, January 1998. Apple Apple Macintosh Performa CD-ROM Jan 1998
Apple Reference, Performance & Learning Expert. Provider Edition, February 1998. Apple Apple Macintosh Performa CD-ROM Feb 1998
Apple iMac System Restore Apple Apple iMac CD-ROM 1999
Blank Apple Macintosh Software Apple Apple Macintosh CD-ROM 1999
Mac OS X Versions 10.1.3/10.2/10.3 Apple Apple Power Macintosh CD-ROM 2002
Mac OS X Version 10.2 Apple Apple Power Macintosh CD ROM 2002
AppleWorks 6 Apple Apple Power Macintosh CD-ROM 2003
Mac OS X Panther Version 10.3 Apple Apple Power Macintosh CD-ROM Oct 2003
Aperture Apple Apple Power Macintosh CD-ROM 2005
iLife '05 Apple Apple Power Macintosh CD-ROM, DVD-ROM 2005
Mac OS X Tiger Version 10.4 Apple Apple Power Macintosh DVD-ROM Sep 2005
Mac OS X Leopard Version 10.5 Apple Apple Power Macintosh DVD-ROM 2007
Mac Box Set (2009) Apple Apple Power Macintosh DVD-ROM 2009

Information About Apple:

Item Manufacturer Date
Apple Computer Inc. 1 Apr 1976

 

 

 

This exhibit has a reference ID of CH1748. Please quote this reference ID in any communication with the Centre for Computing History.
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