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Questions tagged [apple-dos]

for questions about the Apple DOS operating system used on the Apple II series of microcomputers

3
votes
2answers
276 views

How could a 16-sector PROM Apple II access a 13-sector disk?

When the Disk ][ first came out for the Apple II, the PROMs on the interface card only knew how to work with a 13-sector format. Around 1980, the Disk ][ was updated with 16-sector PROMs either for ...
9
votes
2answers
1k views

Was Apple DOS 3.3 created because of the Apple III?

I recently read a document which discussed how the Apple III would implement the Apple II emulation mode. On page 20, it goes on about difficulties involved with how the Apple III would have ...
9
votes
1answer
90 views

Apple II: ProDOS partitions on floppy disks?

On the Apple II using ProDOS, was it possible to create partitions on a floppy disk? Would it be possible to have two or more partitions on a 140k 5.25" or 800k 3.5" disk? (The question here is not ...
9
votes
1answer
155 views

Apple II: What type of partition tables were used?

What type of partition table was used with ProDOS? ProDOS (8-bit) version 1.2 was available in January 1983, one year before the Macintosh was released, so it is unclear to me if ProDOS 1.2 used the "...
17
votes
2answers
444 views

Apple II: DOS 3.3 Virus?

Does anyone know the source of this Apple II DOS 3.3 virus that infected my disks back in the 1990's? I got it from a public domain disk collection that was given to me by a friend, called the ...
85
votes
16answers
19k views

Does “Disk Operating System” imply that there was a “non-disk” Operating System?

In the 1980's at primary school we saw MS DOS and DR DOS competing before Windows 3.1 and subsequent releases took over that space. At home we had Apple II's which booted up to a BASIC prompt. On ...
10
votes
2answers
536 views

Apple II / ProDOS: Run binary games without BASIC.SYSTEM?

Is there a way in ProDOS 8, to directly run old DOS 3.3 binary games without loading BASIC.SYSTEM ? Most games never access DOS 3.3 once the program was running, so even though these were never meant ...
17
votes
2answers
464 views

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

DOS 3.3 was the most common before ProDOS. How did it differ to DOS 3.2 and what versions were there before that?