Apple ProDOS 8
Source: wikipedia.org - Apple ProDOS 8

Apple ProDOS 8


The Apple ProDOS 8 is a disk operating system developed by Apple in 1983 especially for the Apple II computer series. ProDOS 8 has been publicly released on August 1, 1983, and was the most popular operating system for the Apple II series of computers. The original ProDOS renamed ProDOS 8 in version 1.2, is the last official operating system usable by all 8-bit Apple II series computers, and was distributed until May 6, 1993. ProDOS was marketed by Apple as meaning Professional Disk Operating System.

Apple ProDOS 8 was released to address shortcomings in the earlier Apple operating system (called simply DOS), which was beginning to show its age. Apple DOS only has built-in support for 5.25″ floppy disks and requires patches to use peripheral devices such as hard disk drives and non-Disk II floppy disk drives, including 3.5″ floppy drives. ProDOS adds a standard method of accessing ROM-based drivers on expansion cards for disk devices, expands the maximum volume size from about 400 kilobytes to 32 megabytes, introduces support for hierarchical subdirectories (a vital feature for organizing a hard disk’s storage space), and supports RAM disks on machines with 128KB or more of memory.

Today Apple ProDOS 8 is 38 years old!

Apple ProDOS 8 – General information

Overview

IntroducedAugust 1, 1983
DiscontinuedMay 6, 1993
System RequirementsApple II computer
DistributionFloppy disk

ProDOS Versions

ProDOS VersionRelease Date
ProDOS 1.0August 1, 1983
ProDOS 1.0September 1, 1983
ProDOS 1.0October 1, 1983
ProDOS 1.0November 1, 1983
ProDOS 1.0.1January 1, 1984
ProDOS 1.0.2February 15, 1984
ProDOS 1.1August 17, 1984
ProDOS 1.1.1September 18, 1984
ProDOS 8 1.2September 6, 1986
ProDOS 8 1.3December 2, 1986
ProDOS 8 1.4April 17, 1987
ProDOS 8 1.5April 2, 1988
ProDOS 8 1.6June 14, 1988
ProDOS 8 1.7August 8, 1988
ProDOS 8 1.8May 23, 1989
ProDOS 8 1.9July 16, 1990
ProDOS 8 2.0January 22, 1992
ProDOS 8 2.0.1March 4, 1992
ProDOS 8 2.0.2November 2, 1992
ProDOS 8 2.0.3May 6, 1993

ProDOS BASIC Versions

BASIC System versionsRelease Date
ProDOS BASIC 1.0September 1, 1983
ProDOS BASIC 1.0November 15, 1983
ProDOS BASIC 1.1June 18, 1984
ProDOS BASIC 1.2December 14, 1987
ProDOS BASIC 1.3June 17, 1989
ProDOS BASIC 1.4August 1, 1989
ProDOS BASIC 1.4.1July 17, 1990
ProDOS BASIC 1.5May 6, 1993

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