Apple DOS Dead
Apple DOS
KindOperating system
Appeared1978
Ended1983
StatusDead
CreatorApple / Paul Laughton
FamilyIndependent
PlatformApple II
Sourcebitsavers.org ↗
The Apple II's disk system — written in seven weeks, booted a million machines, replaced by ProDOS.
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Apple DOS 3.x (1978) gave the Apple II its disk drive — written largely by Randy Wigginton from a contract with Shepardson Microsystems, it was fast, simple, and hacked on by every Apple II owner.\n\nDOS 3.3's 35-track, 16-sector format and RWTS routines became the standard a generation learned assembly against.