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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4
votes
1answer
79 views

Importance of obeying Apple II IRQ priority

In the Apple II, DMA and IRQ priority is determined by a daisy-chain system, in which a card may only assert an IRQ or perform DMA when all higher-priority cards allow it. I understand the importance ...
3
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2answers
157 views

What is the name/type of the Apple IIc case screws?

My Apple IIc is what appears to be the first US model: A2S4000 with version 255 ROMs. The upper half of the case is held to the base with six Phillips drive button-head 2 cm screws with a very wide ...
3
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0answers
76 views

How do I clean/refurbish an Apple IIc Keyboard?

My Apple IIc is what appears to be the first US model: A2S4000 with version 255 ROMs. The keyboard PCB is marked 820 0108 03 ©1983, and the keyswitches are the "cross" type as seen below, without any ...
2
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1answer
80 views

What are the differences between the various HxC Floppy Emulator hardware options when used with an Apple II?

I have an Apple IIc for which I would like an FDD emulator and I am considering buying an HxC Floppy Emulator to use with it. The Slim model does work with the Apple II, as demonstrated in this video. ...
11
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2answers
802 views

What are my modern options for loading programs and data files on the Apple IIc?

I've recently acquired an Apple IIc. The internal 5.25" drive does seem to make appropriate noises at boot, but I do not (at least not yet) have any floppy disks, with software or otherwise. It's an ...
7
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2answers
144 views

What are the most common Apple II disk image formats and what hardware disk drive emulators can use them?

Archive.org has plenty of Apple II disk images, such as this DOS 3.3 image which is a .dsk file. I also see .nib and .d13 files, e.g. in this ASIMOV LISP collection. There seem to be further formats ...
7
votes
2answers
321 views

What's the best way to hook up an external power supply to the Apple IIc without a 7-pin female DIN plug?

As seems to be typical with Apple IIc purchases these days, mine came without the external power supply. I have ordered some 7-pin female DIN plugs and other adapters that will let me plug a modern ...
6
votes
1answer
238 views

Did the CPU test on the Apple //e Diagnostics utility do anything?

After reading about the Apple //e diagnostics card, I noticed on the screenshot below that it reports a CPU test and that the microprocessor is OK: So I'm curious did the PROCESSOR TEST actually do ...
5
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3answers
394 views

How to use HGR2 (or HGR) on an Apple II

I am a big fan of the TV show lost, and I was trying to make the Dharma Initiative logo. But at certain point I couldn't add new lines of code and the final part of the logo was cut off. I tried to ...
7
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1answer
257 views

What Apple System Monitor/Integer BASIC ROM features were removed in the Applesoft II/Autostart ROM?

In spring of 1978, Apple took the updated 6502 BASIC from Microsoft, fixed some bugs and added some new commands, and released it as Applesoft II. This was soon released as a ROM set (shipped standard ...
11
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1answer
764 views

On what Apple II and II+ keyboards can the ']' character be generated?

It had long been my impression that while brackets [ and ] could be displayed by the Apple II, the standard Apple II keyboard was not capable of generating them. Some time ago I noticed that on this ...
14
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12answers
4k views

Late 1970s and 6502 chip facilities for operating systems

I'm quite unfamiliar with how operating systems used to be written but its clear to me that operating systems were clearly written for these systems. I'm particularly interested in how operating ...
3
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0answers
223 views

What's the first use of the term, “1977 Trinity”?

The term "1977 trinity" has been used, here on Retrocomputing SE and elsewhere, to refer to a set of three computers that started shipping in mid- to late-1977: the Apple II, the TRS-80 Model I and ...
2
votes
1answer
100 views

What are the screen editor commands for MIT LOGO for the Apple II?

I'm playing with MIT LOGO for the Apple II (1981). When I type TO GREET :NAME and hit ENTER it drops me into the "MIT LOGO screen editor." What are the commands I can use here to edit, save, etc.?
10
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2answers
1k views

Small RAM 4 KB on the early Apple II?

Most of the reference material for the Apple II that I have seen refers to the 4116 RAM chip which held 16x1 kbit. This provided 16, 32 or 48 KB in banks of 8 chips. The Apple II motherboard layout ...
5
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2answers
338 views

Build a hardware clone or emulator of Apple II?

These days we are constantly seeing low-cost boards that have huge power (raspberry pi, various arduino-like microcontrollers.) I am hoping I could make, or get, a clone or emulation of an Apple II ...
6
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2answers
428 views

Where can I find the Applesoft line-drawing algorithm?

I’m trying to make some graphics in Processing that look just like what I’d get on an Apple //e. I think the info I seek is in the ROM disassembly but I can’t find anything by googling. I'm also ...
3
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0answers
255 views

How do Apple II BASIC compilers compare? [closed]

Programs like The Beagle Compiler allow AppleSoft BASIC or other Apple II BASIC variants to be compiled. How do the compilers compare in terms of speed, compatibility, and features?
1
vote
1answer
164 views

What word processing software was used by the Apple //e outside of Australia? [closed]

I did enjoy the software that schools provided with the Apple //e in the late 1980's. My memory of word processing software was: Zardax Multiscribe I was in the Australian school system. So other ...
27
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5answers
7k views

Why did the Apple IIe make a hideous noise if you inserted the disk upside down?

When I began high school in 1987 all the computers in the lab were Apple IIe desktop computers. A question has haunted me since then: if you inserted a floppy disk "upside down" the Apple IIe would ...
3
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3answers
230 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 ...
7
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2answers
164 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
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4answers
1k 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
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3answers
888 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 ...
20
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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
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1answer
389 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-...
6
votes
1answer
175 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 ...
9
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1answer
574 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 ...
6
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2answers
497 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 ...
5
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2answers
108 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 ...
3
votes
1answer
215 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
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0answers
147 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
165 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
772 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 ...
22
votes
2answers
605 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 ...
3
votes
1answer
205 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
256 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 ...
44
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13answers
16k 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 ...
19
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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 ...
7
votes
2answers
525 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
votes
1answer
328 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 ...
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
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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
votes
1answer
242 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
votes
1answer
499 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
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 ...
10
votes
1answer
810 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
317 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
571 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
votes
2answers
342 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 ...