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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".

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62 views

Components (hardware and software) and prices of fully working business installations of Apple II systems in 1982-1986 [on hold]

To work effectively with business applications (spreadsheets, databases, text editors, etc.), 1982-1986 systems based on Apple II(e) were equipped with a fairly large set of extensions and peripherals....
4
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0answers
105 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
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1answer
118 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
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1answer
672 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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0answers
265 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 ...
2
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1answer
143 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
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2answers
204 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 ...
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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 ...
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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 ...
4
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1answer
279 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 ...
3
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1answer
247 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 ...
38
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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 ...
15
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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 ...
4
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1answer
178 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, ...
6
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1answer
359 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-...
13
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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 ...
10
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1answer
723 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
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1answer
274 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
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2answers
383 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 ...
3
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2answers
284 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 ...
33
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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 ...
8
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3answers
582 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
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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
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1answer
300 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,$3E,$...
2
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1answer
139 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/...
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0answers
209 views

Cost of Apple II switching power supply

Apple went to the trouble of designing a switching power supply at a time when they were still quite new and not widely used for consumer electronics, perhaps because Steve Jobs liked the aesthetics ...
9
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4answers
589 views

Columns of text in early microcomputers

As discussed in some previous questions here, 80-column text was established by IBM as the standard for business computing as early as the sixties, but monitors capable of displaying that resolution ...
3
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1answer
253 views

Contiki on Apple IIe without Uthernet card

Can I run Contiki on my Apple IIe without an Uthernet card? For example, I was thinking that I could run my Raspberry Pi to emulate a network card through the serial port as a null modem. Any ...
7
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2answers
449 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 ...
2
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2answers
296 views

What's the fastest Apple II (sans accelerator card)?

The candidates are: Apple IIgs, with its 2.8 MHz 65816 CPU, running in 65C02 "emulation mode" Apple //c+, with 4.0 MHz 65C02, but overclocked to 8.0 MHz Laser 128EX with 3.6 MHz 65C02 I want to know ...
5
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2answers
190 views

How can you reset the behavior of ONERR in AppleSoft BASIC?

In an Applesoft BASIC program you can use the standard MS-BASIC ONERR statement to perform error trapping. For example: 10 ONERR GOTO 100 20 POKE 0, 400 : REM INVALID VALUE WILL CAUSE ERROR 30 END ...
33
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,...
7
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3answers
516 views

Practical uses for Applied Engineering 65C816 replacement for IIe?

Applied Engineering produced many advanced and unusual add-on devices for the Apple II product line. One of these was a 65C816 CPU card for the Apple IIe, which replaced the processor with a daughter ...
9
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2answers
467 views

Is all 100% of a 64k Apple II memory usable?

Are there any areas of the 64k RAM which are permanently unusable by anything, whether by the built-in monitor ROM or user programs? Looking at $C000-C0FF, this is the "softswitch" area, and as far ...
6
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2answers
226 views

In Applesoft BASIC, does combining statements into a single line speed up execution?

In Applesoft BASIC, does combining statements into a single line speed up execution? For example, would this: 10 PRINT "HELLO WORLD" : FOR I = 1 TO 100 : PRINT I : NEXT I Run faster than this: 10 ...
5
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2answers
147 views

How to test an Orange Micro Grappler+ card?

Are there some tests that can be done to verify the operation of an Orange Micro Grappler+ printer interface card (1982) in an Apple //e? I've searched around the web and the paper manuals for ...
8
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2answers
590 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 ...
8
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1answer
551 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 ...
1
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1answer
206 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,...
6
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2answers
549 views

Is the Apple II “No-Slot Clock” compatible with the Thunderclock?

The Apple II series (up until the IIgs) did not have a built in clock. As such, there were a few add-on devices that could be installed that would keep a battery-backed time that could be queried by ...
6
votes
1answer
389 views

Need help identifying math game where equations let you move from room to room?

Can anyone help me find an old math game where equations let you move from room to room? I played the game on an Apple II back in middle school and I want to use it with my daughter to teach her math. ...
9
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1answer
583 views

Why are some soft switches on the Apple II only triggered with a write?

The Apple II uses memory mapped I/O and soft switches to do many things. One thing has confused me though: why are some soft switches only activated when written to? For example, 80COLON ($C00D) and ...
5
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1answer
231 views

Apple II: LED near joystick connector?

Some Apple II motherboards have a red LED in the back-right corner near the joystick / cassette in/out connectors. I have never seen it illuminated. What is its purpose?
7
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1answer
325 views

How can I tell if an Apple II disk image is bootable?

I have around 500 floppy disk images from an Apple II and IIgs BBS/usergroup that closed down recently. Some of the disks are bootable, but many aren't. Is there an easy way to tell if a disk boots ...
5
votes
1answer
277 views

Need help identifying an Apple IIc game/possibly educational with a top-down view

Played it around the end of the 80's but most probably developed between 1981 and 1986. You had control over a person/avatar (not stick figure like, more plump looking) and could walk from scene to ...
3
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2answers
362 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 ...
4
votes
2answers
672 views

How does the Apple II address more than 128KB of RAM?

For the Apple //e, it was very common to have an extended 80-column card installed which brought the machine up to 128KB of RAM via 2 banks of 64KB each. There are soft switches in the $C0xx space ...
9
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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 ...
33
votes
3answers
4k 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 ...
11
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1answer
672 views

Early Apple assemblers, getting hold of them

The apple ][ history site https://apple2history.org/history/ah17/#05 has a section on assemblers with these interesting snippets: TED/ASM: Developed at Apple and smuggled out the doors around May ...