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".

1
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1answer
19 views

Why did the Apple //e behave in certain unfriendly ways?

When I began high school in 1987 all the computers in the lab were Apple //e desktop computers. So I have a question that has haunted me: The disks were floppy disks, often the Verbatim brand, to ...
3
votes
3answers
155 views

Is there any tool to convert .DSK to mp3 file?

I was looking into the Apple II disk server (See below for background information) and curious if there is a tool that can actually convert .DSK image to .MP3 file, as the underlying c2t only supports ...
1
vote
1answer
277 views

Apple II Plus modifier key doesn’t work

I received my Apple II Plus today from eBay. I powered up my computer without adding anything into it (it didn’t came with any card either). It started up in the ROM Applesoft BASIC just fine. However,...
5
votes
2answers
139 views

What combinations of modifier keys can you detect on an Apple II?

Apple II computers other than the IIgs (which uses ADB) have a hardwired keyboard combined with the paddle/joystick ports for input. What combinations of modifier keys can you detect? I know that the ...
4
votes
4answers
982 views

Why does this Apple //e drops into system monitor when booting?

I recently purchased an Apple //e online as well as a BMOW Floppy Emu in order to emulate some disk images. After working with it successfully for awhile, this monitor consistently appeared in lieu of ...
10
votes
3answers
799 views

Did Apple bundle a specific monitor with the Apple II+ for schools?

Sometime in 1980 (or maybe 1981) my school district purchased its first batch of Apple II+ computers. I remember vividly they had absolutely no idea what to do with them, and so the machines were ...
6
votes
2answers
489 views

Did any Apple II games use a “timing resistor”?

A science-lab program for the Apple II (I forget the name) had a board that plugged into the joystick port and included a "timing resistor". While I don't know what the program actually did with the ...
20
votes
1answer
2k views

Why was it possible to cause an Apple //e to shut down with SHIFT and paddle button 2?

Looking at the MAME driver for the Apple //e, I noticed an interesting comment: NOTE: On real IIe and IIe enhanced h/w, pressing SHIFT and paddle button 2 will short out the power supply and cause ...
9
votes
1answer
545 views

Why wasn't the Z6 version of the Infocom Z-machine ported to the IIgs?

Infocom ported their Z-machine to nearly every viable platform in the 70s and 80s. Zork runs on around 18 different 8/16 bit platforms using earlier versions of the Z-machine. Why was Z6 the graphical ...
9
votes
1answer
255 views

How did the Zip Chip and RocketChip accelerators work for the Apple II?

Though there is already a similar question on the site, this one is more specific to these chips and their technical implementation. There were two accelerators for the Apple II series that were drop-...
5
votes
2answers
102 views

Does the Apple IIgs FPI assert /CROMSEL for *write* accesses to the extended ROM space?

The FPI (fast processor interface) ASIC in the Apple IIgs generates the /CROMSEL chip-select signal, which is used to select a ROM in the memory expansion slot. Obviously the /CROMSEL signal must be ...
6
votes
1answer
162 views

Why does the Apple IIgs FPI chip buffer the A14 address signal to the ROM?

In the Apple IIgs computer, the address and data buses of the 65C816 CPU connect directly to the onboard ROM, except for A14, which, according to the schematic, is routed through the FPI ASIC. There's ...
10
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3answers
741 views

Is it possible to crash the Apple II using only the Apple II Basic REPL?

Prerequisites: 1) Apple II 2) Basic Prompt Using only the instructions provided, can you crash the Apple II? I'm curious if this is even possible because I have only ever programmed the ...
5
votes
2answers
359 views

Why did the Apple IIc perform badly in the market?

The Apple IIc was a compact version of the Apple II that eschewed internal expansion slots in favor of having the popular expansion options already built in, and saving cost and weight. Apple expected ...
12
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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 ...
21
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2answers
426 views

Why did Apple remove booting from external drives in later IIc ROM versions?

Apple II computers don't come with DOS in ROM, but rather need to boot from a floppy disk to make the disk drives usable. The IIc was the first Apple II that came with a built-in disk drive, so ...
44
votes
13answers
15k views

How was it back then in 1984, when the Apple II had color, and the new Macintosh didn't?

I imagine it being a huge downgrade for some, not to have color on the Macintosh. Macintosh games were black and white in the beginning, while Apple II had color. I'm especially interested in ...
3
votes
1answer
129 views

How much RAM did the first version of Oregon Trail on the Apple II require?

The later iterations of the series could have hundreds of kilobytes of RAM, but the original Apple II had 4K in the minimum configuration and 48K maximum (the latter using 16kbit chips which were ...
4
votes
0answers
130 views

What would happen if the DHR jumper was enabled on a Rev A Apple //e?

The Apple //e originally did not support Double HiRes graphics (DHR). The engineers realized they could double their hires and lores X resolution shortly after the introduction of the machine, so the ...
2
votes
1answer
132 views

How to transfer file from one disk to another in Apple //e (Applewin)

For the nostalgia, I'm going through Apple Pascal - A Hands-on Approach using AppleWin. There are four disks, pascal0 through pascal3, and for some reason pascal0 is missing a file called SYSTEM....
12
votes
1answer
722 views

Was the Spartan by Mimic Systems a real product?

I was flipping through an old copy of RUN magazine and came across an advertisement for a product called "The Spartan" produced by Mimic Systems. I had forgotten about this product completely, but I ...
13
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3answers
605 views

Can the CSG 65CE02 CPU be used to accelerate an Apple //e or //c?

The CSG 65CE02 is an improved 6502 microprocessor that was shipped in small quantities by Commodore around 1988. It is used in the Amiga A2232 multi-port serial controller card, and that would be the ...
16
votes
3answers
741 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 ...
2
votes
1answer
173 views

A game where you could sell body parts for cash

Ages ago I played a scifi game on the Apple IIgs where you could sell body parts for cash. The game involved travel between planets and selling parts of yourself was a last ditch option to raise money ...
3
votes
2answers
216 views

Why not make more use of the video generation logic?

The Apple II is famously built around its video generator. Conveniently, addresses are generated which scan all of the video memory and somehow spits the contents onto the screen. Its occurred to me ...
17
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2answers
2k views

Why did the original Apple //e have two sets of inverse video characters?

According to Apple II Technical notes Mouse #6, updated January 1989, In unenhanced Apple IIe computers, the alternate character set contained two sets of inverse uppercase characters. In the ...
3
votes
1answer
537 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 ...
3
votes
1answer
289 views

Why did SAM on the Apple II use its own DAC?

From the comments on this question, the SAM on the Apple II seemed to use some proprietary hardware to produce the waveform. (I am not counting the option to produce a horrendous 1-bit PWM using the ...
6
votes
1answer
405 views

Trying to identify an Apple II space trading game

I'm trying to identify a game I remember from my first exposure to computers (the Apple II at secondary school back in the late '70s). I remember two games I really enjoyed, the first a Star-Trek-...
39
votes
3answers
4k views

How did Apple ][ basic programs protect against listing?

I seem to recall from my high-school days that certain Apple ][ programs protected themselves from being listed and therefore modified. If you tried to do it, the machine would simply reboot. How ...
16
votes
1answer
2k views

How do accelerators and CPU cards work on the Apple II?

An Amiga 1200 exposes the entire CPU bus on the expansion port, so that an accelerator only needs to assert BR which causes the onboard CPU to stop all computation and electrically disconnect from the ...
7
votes
1answer
608 views

Apple II bus: IRQ and DMA priority

One of the weirdest misfeatures of the Apple II - and perhaps the dumbest thing Woz ever designed - is the vestigial priority system for IRQ and DMA on the Apple II expansion bus. Each slot has four ...
34
votes
4answers
7k views

What determines the color of every 8th pixel on the Apple II?

On the Apple II there's an interesting way to add a little color to the bitmap, since the high bit select the palette used for the three-and-a-half pixels represented by the byte. Like this: 0: Black,...
4
votes
1answer
202 views

Why did PAL Apple //e motherboards have the AUX slot inline with Slot 3 instead of near the power supply?

The Apple II architecture supported 7 memory-mapped expansion cards which could be optionally installed towards the rear of the motherboard in individual expansion card connectors. On the Apple //e, ...
35
votes
7answers
8k views

How did Apple fail to tap the business and scientific markets?

Currently reading an excellent book called Blue Magic: The People, Power and Politics Behind the IBM Personal Computer, which is just what it says on the tin; highly recommended to anyone who wants to ...
9
votes
2answers
175 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 ...
13
votes
2answers
3k views

1980s game with a guy with an axe on a flying disc

I'm trying to identify a game I remember from the 1980s. The game was shown from a bird's-eye viewpoint (or maybe isometric?), on Apple IIe, IIRC. You controlled a guy with an axe, who was ...
3
votes
2answers
318 views

Labor input for manufacture of early personal computers

In the early days of personal computers, manufacturing was not as automated as it later became, and a factory would often consist of people sitting at tables placing components by hand. I'm ...
10
votes
1answer
765 views

Help identify old Apple game from 80s (Apple II, Apple IIGS)

I am trying to remember the name of a game I played on Apple II or Apple IIGS. From what I can remember, the beginning of the game you are looking for your lost uncle or something. You to another ...
5
votes
1answer
292 views

Recent article about using Apple II for security purposes

I'm looking for the article for a project. It is fairly recent, may have been a news article, or a blog. It in turn might have referenced a scholarly paper. Anyway, the gist of the article was that ...
5
votes
2answers
448 views

Is there any benefit of using an Apple Language Card in an Apple IIe?

From what I understand, the original Apple Language Card was basically a RAM expansion card for the Apple II and Apple II+. This expansion increased the on-board RAM by 16K. Normally, if you needed ...
8
votes
2answers
714 views

How did the Address Decode for Apple II Expansion Cards Work?

How did the Apple II decode the addresses for the expansion cards? From The Apple Story: Alan Baum helped a lot. I already had some address decoders on the board that decoded every 16th and ...
18
votes
3answers
733 views

Did the Apple IIe Platinum include all feature enhancements from the Apple II line?

Not including the Apple IIgs, did the Apple IIe Platinum include all enhancements made by Apple? For example, the first Apple IIe couldn't utilize the Double Hi-Res mode from what I understand. In ...
34
votes
3answers
5k views

What was the point of Apple Pascal having its own file system?

Apple's UCSD Pascal for the Apple II used its own file system rather than the existing DOS 3.3 of the day. I'm not sure if it overlapped SOS at all, but regardless of timelines it seems that the ...
8
votes
3answers
677 views

How specific was the Apple II floppy disk controller?

One of Wozniak's greatest inventions was the Apple II floppy disk controller, which allowed Apple to avoid going the Atari/Commodore route of making each disk drive a computer in its own right; ...
10
votes
4answers
2k views

What are the rules for Applesoft BASIC formatting for code?

What are the rules for Applesoft BASIC formatting for code? I've been doing some BASIC coding and noticed that: 10 input "some question?"; name$ Will be reformatted as: 10 INPUT "some question?";...
5
votes
1answer
312 views

1980's ROM used which exp(n) algorithm?

In 1980's ROM (Apple IIe, Commodore 64, VIC-20, ...) which algorithm is used to compute exp(x), and where do the coefficients below come from? (Chebyshev, Remez, Pade, ...) .byte $71,$34,$58,$3E,$...
8
votes
2answers
478 views

How did the Microprofessor II have space for a Chinese font in the ROM?

There's an Apple II clone from Taiwan which apparently forgoes the text mode and just has a graphics mode because it's simpler that way to render Chinese writing. It had a 16K ROM, of which 12K is a ...
13
votes
4answers
1k views

Was the Apple II ever sold in kit form?

In the June 1977 issue of BYTE magazine I saw an advertisement stating you could order an Apple II and it had a price list. One of the columns was titled "Apple II Board-only". The price for that ...
2
votes
1answer
152 views

Turn off Apple IIe sound

Is there a way to disable sound output on the Apple IIe from Applesoft Basic? Can't seem to find this in any of the documentation or online. Update: Found this From http://www.calormen.com/jsbasic/...