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How many versions of DOS were there for the Apple II and what were the differences?

There was no public release of DOS 1 or 2. DOS 3.1 was actually the first release to the public. It had a pretty significant bug in its MASTER CREATE program, and so the patched version DOS 3.2 was ...
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6 votes
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How specific was the Apple II floppy disk controller?

The Disk II controller in its original is effectively limited to the Disk II because of the connections offered; in particular it expects direct control of a four-phase stepper motor whereas the ...
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5 votes

How specific was the Apple II floppy disk controller?

The IWM chip, used in the prototype Mac with double sided "Twiggy" drives, and later in the original production Mac 128k with Sony 3.5" diskette drives, is basically Woz's original disk controller ...
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5 votes

How specific was the Apple II floppy disk controller?

TL;DR It's wasn't any more specific than any other controller. Apple did in fact make the switch to 3.5" (for the Mac) using the Apple II controller - just now as a single chip implementation ...
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2 votes

How many versions of DOS were there for the Apple II and what were the differences?

There were also two other formats common on the Apple ][: Pascal and CP/M. Though the latter required a special Z80 CP/M card (such as the Microsoft Softcard), the former was proprietary to the UCSD ...
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