Questions tagged [apple-macintosh]

For questions about Apple's Macintosh line of computers.

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2
votes
1answer
148 views

Mac SE tube won't come on?

My SE was working fine until I took it apart to clean it, and after reassembly the tube won't turn on, what could cause this? enter link description here
6
votes
1answer
147 views

Was AppleTalk 422, 423, or something else entirely?

The Zilog SCC in the early Macs could operate in either 232 or 422 mode. AppleTalk used the later. 422 and 423 differed primarily in that the former used separate return lines for each data line, ...
19
votes
2answers
2k views

What causes the traces to wrinkle like this and should I be worried

I have a Macintosh SE in my collection and I noticed these odd looking traces on the mainboard. Not quite sure what to think of it
8
votes
1answer
453 views

Will any serial mouse connect to Classic Macs?

The Macintosh 128k, 512k, and Plus use a DE-09 Serial port for the mouse. Is there some proprietary data-transfer method? Or is any DE-09 Serial mouse compatible? Furthermore: has anyone documented ...
2
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2answers
161 views

Non-obvious compatibility of M1297 monitor

I bought an Apple IIgs recently. I didn't do my research well enough and wound up with an M1297 monitor, which of course appears to only be compatible with Macintosh IIs and such, rather than the ...
5
votes
2answers
190 views

Dimensioned drawing of 64-pin SIMM?

I am looking for a dimensioned drawing of a 64-pin SIMM PCB like the ones used in the Macintosh II series for the ROM SIMM. I looked in Guide to the Macintosh Family Hardware and Designing Cards and ...
3
votes
2answers
221 views

When and why would MacinTalk say “open-apple hold”?

I'm trying to confirm a vague recollection about the text-to-speech PlainTalk / MacinTalk software shipped with Macintosh computers. If my memory is right, this would have been around 1994, and based ...
7
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2answers
412 views

What was the Macintosh's BOM cost?

Andy Hertzfeld revealed that the CPU for the original $2495 Macintosh cost just $9.00. How much did the rest of the computer cost? Was the markup really greater than Pepsi's markup on sugar? How much ...
13
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2answers
1k views

What was the design of the Macintosh II's MMU replacement?

I am in the process of repairing a Macintosh II and trying to understand the design rationale behind Apple's MMU replacement part installed in this machine. As you can see in the picture, there is a ...
5
votes
2answers
353 views

Was Apple's Developer Release DR1 of Copland ever distributed?

From 1994 to 1996 Apple developed a complete new Mac OS, codenamed Copland, intended to be published as System 8. A first public demo was made at the May 1996 WWDC. Shortly before it was canceled, a ...
9
votes
1answer
203 views

Mac Plus flyback transformer replacements

The short: How can I tell which flyback transformers would work for a 9" Macintosh? The long: I've soldered on flyback transformers on old Macs that have gone bad in the past, but when my Mac Plus ...
4
votes
2answers
209 views

Macintosh SE/30 cover screw size

I lost the 4 Torq (T15) screws that hold together the case for a Mac SE/30. Does anyone know the size and the groove spacing to order a compatible one? I found these on eBay, but I'm not sure about ...
1
vote
1answer
259 views

How much time does a Mac SE/30 with 128 MB of memory take for its power-on memory test?

I've read that it should be possible to push the SE/30 to its maximum RAM capacity with eight pieces of 16 MByte, 30-Pin SIMMs. I've never seen such a machine in the wild. Neither with 64 or 80 MB. ...
2
votes
1answer
234 views

Capacitor replacement on European 220 volt Mac 512K And Plus

I have had two Macs, a 512K and a Plus, in storage since they failed the smoke test in a spectacular manner a few years back. I have finally learned how to solder and de-solder, so I think its time to ...
2
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2answers
196 views

AppleTalk adapters to bridge LocalTalk to Ethernet?

What AppleTalk adapters can bridge LocalTalk to Ethernet? There are some adapter that allow LocalTalk printers to show up on ethernet, but I want to allow computers to talk. My IIgs has LocalTalk but ...
4
votes
1answer
287 views

Is is possible to repair a SE/30 with reversed C2 and C11 capacitors?

Shamelessly stolen from BobDenford on Reddit. I recapped my SE/30 but mistakenly reversed the polarity of the two axial capacitors (C2 and C11). Prior to my error, the machine was fully functional ...
2
votes
1answer
284 views

How to read old 3.5" Macintosh formatted floppies on a MacBookPro

I have connected a USB external floppy drive to my Macbook Pro (OSX El Capitan). I am unable to "view" the external drive, and hence unable to access the floppy content. I have inserted a floppy, ...
16
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4answers
4k views

Why did 3.5" floppies win (and not another size)?

It's an open question whether desktops would've kept using 5.25" until the end of the floppy era, but laptops meant something smaller was going to be introduced; that much was essentially ...
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 ...
5
votes
2answers
233 views

Tools for creating disk images on Mac Plus

I got BMOW's floppy emulator and have been pulling a bunch of files from 30 year old floppies (which have a miraculously low rate of failure) onto my SD card. One of the things I wanted to copy was a ...
9
votes
1answer
317 views

What exactly did Sony contribute to the original Apple PowerBook?

The first Apple PowerBook laptops were delivered in 3 versions in 1991: PowerBook 100, 140, and 170. These initial PowerBooks were overall a tremendous commercial success for Apple, and are regarded ...
6
votes
2answers
345 views

What is the highest version of System 7 that can be run on a Mac SE/30?

My recently restored Mac SE/30 has System 7.0 running on it at present, booting from an original SCSI HDD. I’m missing a few key features, like disk image mounting, which I understand were added in ...
5
votes
3answers
355 views

How can I debug a Mac OS Classic application?

I have a Mac OS Classic application (a game) that I want to "debug". It has data files in a unique format than I am attempting to reverse-engineer. I've made some progress with a hex editor, but ...
16
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5answers
2k views

Was 1991's Hellcats the first instance of incremental screen updates?

In case you have never seen it, 1991's Hellcats was a seminal release on the Mac. It ran at full 8-bit color and could, on a newish machine, drive three 1024x768 screens at the same time. Nothing on ...
5
votes
1answer
206 views

Macintosh System 6 on Quadra?

System 6 is not officially supported on 68040 Macintoshes, but has anyone successfully run System 6 on an early Quadra, e.g. the Quadra 700?
27
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6answers
9k views

How did the early Macintosh computers update the display?

This question is about the Macintosh 128k, but if you can give an answer which describes one of the other very similar machines, that's good too. The bitmap was 512 by 384 pixels. Assuming that one ...
5
votes
1answer
733 views

How to install System 7.5.5 on a Macintosh SE/30 using floppies?

I have a Macintosh SE/30 with a formatted Disk. I'd like to install the latest System 7 on it that will run. According to Wikipedia that should be 7.5.5. According to several sources Apple has made it ...
45
votes
10answers
8k views

Why was preemptive multitasking so slow in coming to consumer OS's?

Preemptive (rather than cooperative) multitasking was a highly-touted feature for PC's in 1996, with its inclusion in Windows 95 for the first time. It was also highly-touted for 2001 Macs when ...
1
vote
1answer
231 views

What happened to the Apple Device SBC that was supposed to compete with the linux SBCs? [closed]

I am not sure if this question is "on topic" or not, but I'm asking it anyway... I was reading Hackaday.com a few months ago and I came across this article: https://hackaday.com/2016/04/01/apple-...
8
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2answers
584 views

Why did some Mac computers have two names?

Many, if not all of the Performa and Quadra systems seemed to have two names. For example the LC 475 was also known as the Quadra 605.
3
votes
2answers
373 views

When did the Macintosh start using four (or more) layer PCB's?

I'm assuming (but do not really know) that the original Macintosh used a two layer PCB. So my question is, when did the Macs start using more complicated boards with four (or more) layers? For ...
8
votes
1answer
899 views

What was the name of the object-oriented C language I used in the 1980s on the Mac

I clearly recall working with an object-oriented C derivative on the Mac but I cannot find any definitive references to it. It was back in the days of System 7 and later System 8. It had both ...
22
votes
1answer
4k views

Why do all the Speech Synthesizers have that same Voice?

The first time I ever played with software speech synthesis on a microcomputer (not hardware synthesis, like in TI's Speak & Spell) was around 1983, using S.A.M for the Commodore 64. A year later,...
3
votes
2answers
251 views

68k macintosh lowmem system globals

While digging through a classic Mac 68k disassembly I got to the point where I need to know more about the "Boot Globals" residing in lowmem's system global variables. BootGlobPtr lives at $DDC, that'...
2
votes
2answers
250 views

Macintosh Performa 200 Mouse and Keyboard Issue

I have a Macintosh Performa 200 and I’m trying to get it working again. It powers on normally and then it brings up the normal Mac OS screen but the mouse and keyboard don't work. Yesterday they were ...
8
votes
1answer
395 views

Was the Mac XL hardware different from the last versions of the Lisa?

The Lisa was a fairly impressive platform for the day. In comparison to the original Macintosh, the two did have different displays and aspect ratios but the Lisa also had additional hardware such as ...
6
votes
1answer
300 views

Old multimedia: Monochrome Macintosh / Laserdisc player

Back in about the mid-1980s, there was a period of time when "multimedia encyclopedia" and training resources were being made for schools, for the early monochrome-only Macintosh that tied it to a ...
10
votes
2answers
847 views

Apple II GS versus Mac Plus cost

I just came across a fascinating video https://www.youtube.com/watch?v=7h4tepFbMso&t=78s which makes a coherent case - I don't feel I can pass a final verdict on whether he's right or wrong, but a ...
2
votes
2answers
323 views

Programming on Macintosh Centris 610

I just bought a Macintosh Centris 610 and I'm trying to do some C programming on it. But I can't find the terminal and someone told me there isn't a terminal on classic MacOS. My goal is to have a ...
5
votes
1answer
421 views

What is the title of this Macintosh programming book?

Back when Mac OS was called "System" and preemptive multitasking was a distant fantasy, I had a small collection of Macintosh programming books. For the life of me, though, I can't remember what one ...
8
votes
2answers
922 views

Can the ADB keyboard and mouse be converted to the 128K Macintosh?

As you probably know, the original Macintosh 128K, 512K (Fat Mac) and the Macintosh Plus (IIRC) have a different keyboard and mouse connection than the later ADB versions such as the Macintosh SE ...
6
votes
2answers
889 views

Macintosh LC II power supply clicking

I have a Macintosh LC II that I just acquired. When I attempted to power it on, I got nothing. No tones, no LED, no fan...nothing. I took out the power supply and tried to measure any voltage ...
8
votes
2answers
637 views

Can a standard ATX power supply be used on a Macintosh Performa 476?

I just received a Performa 476 and was shocked at the amount of rust in the computer. I believe it literally sat underwater for some time. The motherboard looks like it can be salvaged but the power ...
14
votes
4answers
958 views

Original Mac capacitor inspection

Which capacitors should be inspected and, if necessary, replaced before attempting to power up an original Mac (purchased January 1984, but "upgraded" to a 512Ke) that has been sitting unused for a ...
14
votes
1answer
2k views

What was the first C compiler for the Mac?

When did a C compiler first become commercially available for the Apple Macintosh? And what was its name? The only programming languages that I recall were available for the Mac at launch (January ...
15
votes
3answers
1k views

How did the original Apple Macintosh and Atari ST use protected mode?

The Macintosh, ST, and Amiga were all 68000 CPU systems released in 1984-85, along with their respective new Operating Systems. While this was 5 years before protected mode became commonplace on Intel ...
10
votes
2answers
1k views

Which Apple floppy drive is compatible on both Apple IIc and Macintosh

I have an old Apple IIc (not Plus) and an old Macintosh Plus (1MB RAM). I want to buy an external 3.5 inch floppy drive that works on both machines, that way I don't need two different drives around ...
5
votes
0answers
271 views

Find the PGP SDK

Starting in 1998 (I think) the PGP company run by Phil Zimmerman released the PGP SDK for Mac, Unix and Windows. This was a big event because it was the first time that comprehensive, high grade ...
61
votes
11answers
16k views

Did Apple not originally allow anyone to develop software for the Macintosh?

This probably nearly belongs on Skeptics.SE but here goes. Within the last few years I've become an Apple convert for the most part, which occasionally brings me into (usually) good natured conflict ...
10
votes
1answer
915 views

What was the significance of the cursive 'ƒ' in an application name?

I feel like I used to know the answer to this... In classic Mac days, probably the early 90s and before, some applications would have a cursive / decorative ƒ character in their names. What was the ...