Questions tagged [apple-ii]
The Apple II series of personal computers and related software and hardware. Use [apple-iigs] for the Apple IIgs in particular, or [apple] for Apple hardware in general.
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NTSC scan lines used by 8-bit computers
Several computers of the late 70s used a TV set for their display. I'm not talking about the TRS-80, which came with a monitor that was basically a stripped-down black and white TV set, but computers ...
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Apple II sales by sector
Of the American 8-bit personal computers, the Apple II was arguably the most general, in that it sold well to home enthusiasts (Woz's original intended target market), schools (thanks in part to the ...
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US equivalent of the Microvitec Cub monitor
In the 8-bit computing era, UK schools acquired BBC Micros in a project sponsored by the BBC. The monitor typically used with these was the Microvitec Cub.
In the US, there was also a push to put ...
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Getting garbled text when using ADTPro with Apple IIc and serial connection
I am currently having issues while trying to use ADTPro to connect to my Apple IIc and was wondering whether anyone could help me. I am using this serial connection kit and trying to bootstrap from ...
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What were MECC's specifications for a school computer in 1978?
It is well-known that one key moment for Apple was selling 500 Apple IIs to the Minnesota school system in 1978.
I came across this video which discusses the background to that, including a reminder ...
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ProDOS BASIC.SYSTEM overwrites RNDL ($4E) - how to get random numbers
I am writing an application that uses random numbers. The plan is to use RNDL/RNDH ($4E) to initialize a pseudo-random number generator. Unfortunately, I keep getting the same sequence. Tonight, I ...
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What is likely cause for sudden auto-rebooting of Apple II+ with Disk II?
I have the Apple ][+ with 64 KB RAM: 48 KB on the motherboard plus 16 KB on the Language Card, in Slot 0. Slot 6 has disk controller for two Apple-manufactured Drive ][ floppy drives. The display is ...
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How Can Apple II DOS 3.3 Floppy Disks be Restored after Formatting with INIT?
I have files on around 50 5.25" floppy disks. Most are in the Apple II (or ][ Plus), DOS 3.3 formats. I have the Apple ][+ with 64K RAM (48K on MBd plus 16K on the Language Card in Slot 0), and ...
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Did any DOS 3.3 variants relocate start of BASIC?
A common annoyance when programming in BASIC on the Apple II is that 6K of BASIC storage area falls before the start of the first hires screen, with another big chunk of storage falling after it. On ...
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Help understanding TAIPAN source code for the Apple II
I am trying to run the source code found at https://taipangame.com/BASIC.txt on Epple 2 (with Apple II+ roms) to eventually run on my own Apple II+, but the program keeps crashing.
First, I used a ...
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What were the differences of the various AE RamWorks cards?
Applied Engineering (AE) produced some 80-Column cards for the Apple //e that, unlike Apple's offering which only brought the machine up to 128KB, would allow a user to install up to 3MB in addition ...
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Defective Apple IIe motherboard
I have a PAL Apple IIe, put in service in 1982. Components C9, C12, C15, and C17 on the 820-0073-B motherboard are burnt out. I originally thought they appear to be power diodes, but seem to be 10 µF ...
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What's the correct Unicode code point for the Apple IIe's "delete" symbol?
I was writing an essay today about using the Apple IIe I grew up on, and I wanted to add some examples that included the "delete" symbol that was used for the cursor:
But try as I might, I ...
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Apple ][ nibble disk format specification
Is there an official specification for .nib format disks for the Apple? I'm currently debugging through a CP/M boot disk for a Cirtech //e Z80 which works fine on real hardware but fails in an ...
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Were the Apple II patents, obstacles to cloning?
The Apple II was a simple design relative to its retail price, so attractive to cloners. This naturally led to many lawsuits, at least one of which actually established new copyright law. https://en....
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