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Questions tagged [apple-ii]

For questions about the Apple II series of personal computers, and related software and hardware. For questions about Apple hardware in general, use the tag "apple"; for questions about the IIGS in particular, use the tag "apple-iigs".

16
votes
3answers
621 views

What are the differences between the versions of AppleSoft BASIC?

Apple did make some changes to AppleSoft BASIC over the years between the first version on the Apple II and the last version on the Enhanced IIe and IIe card. What are the differences between the ...
17
votes
2answers
584 views

How can I programmatically tell which version of Apple II my code is on?

There are minor and major differences between the many Apple II models. I would like to detect whether my 8-bit assembly language program is running on a II, II+, IIe (enhanced or not), or ///, and ...
14
votes
1answer
556 views

Why is the Apple II hi-res HGR command so slow?

The Apple II hi-res screen sits on 8KB of memory, so it should be possible to erase it quickly. The Applesoft HGR command is slow enough that the "Venetian blind" erasure is clearly visible. ...
3
votes
1answer
494 views

Why won't the game “Ultima I” work on my Apple IIe system? [closed]

I'm trying to complete the original Ultima I on an Apple //e. These instructions explain space flight, but I can't seem to destroy enemy ships in order to become a Space Ace, even when I should be ...
9
votes
1answer
280 views

Differences in disk storage between systems

Coming from the TRS-80/TandyColor Computer lines, I had always heard of how slow some other systems disk storage were, regarding data transfer rates, etc... The CoCo lines disk storage was pretty fast ...
12
votes
1answer
369 views

How did the Lazer Systems Graphics Plus board work?

The first two Apple II models (the ][ and ][+) were unable to display lower case on the text screen. Some 3rd parties made lower-case adapters that replaced the character ROM (e.g. Dan Paymar's ...
8
votes
2answers
1k views

What format is used for Apple II cassette tapes?

Apple II computers initially used audio cassette tapes for storage. How was the data stored? What was the maximum bit rate?
11
votes
1answer
357 views

What's the difference between DOS-ordered and ProDOS-ordered disk images?

Apple II emulators accept disk images in "DOS order" or "ProDOS order". What's the difference? Why have two different formats?
21
votes
2answers
537 views

How do I use shadowed memory to render Super Hi-Res quickly?

The Apple IIgs video memory is controlled by the 1MHz Mega II chip, so directly accessing the Super Hi-Res page in bank $E1 is slower than accessing other memory. How can I render in "fast" memory, ...
27
votes
1answer
1k views

How does “bit-slip” copy protection work?

Some Apple II 5.25" floppies used a special pattern of bytes that could not be automatically detected by disk copying software. How could the pattern be invisible to disk copiers but detectable by ...
17
votes
2answers
794 views

Transferring from Apple II

I have also found a working 1978 Apple II. Now my dad wants me to transfer its data to another device without using fancy Apple II exclusive hardware and if possible, through a cassette port. Now, ...