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6
votes
1answer
871 views

What pins on the PS2 AV out port are the audio pins?

I'm trying to get some LEDs to be synced with sound. I'm trying to find the pins for the left and right audio on a fat PS2 motherboard. All I can seem to find is a pin with a solid 10v and 2 pins that ...
21
votes
2answers
2k views

What are the “Screen Holes” in Apple II graphics?

I've read the term screen holes many times in the context of Apple II graphics. From what I understand, it has something to do with the interleaving storage of graphics (or was it text) and that some ...
11
votes
3answers
2k views

What is the name of the back arrow key on C64 keyboard?

What is the name of the back arrow key on top left corner of the C64 Keyboard? Is it escape or back? Also I don't recall using this key. What was the intended usage of it?
11
votes
3answers
3k views

Amiga-looking keyboard for PC

I would like to use an Amiga-looking keyboard on my PC. (I prefer not to use my old original A2000 keyboard with an adapter, partly because it lacks many keys present on modern 105-key keyboards, and ...
16
votes
2answers
638 views

Apple II: DOS 3.3 Virus?

Does anyone know the source of this Apple II DOS 3.3 virus that infected my disks back in the 1990's? I got it from a public domain disk collection that was given to me by a friend, called the ...
62
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 ...
9
votes
0answers
386 views

Did the Apple ][ ever ship with the Autostart ROM

Did the Apple ][ ever ship with an autostart ROM from the factory or were they all the older ROM with Trace/Step? My guess would be that once the ][+ started shipping then new Apple ][ production (...
5
votes
2answers
675 views

What does the blinking of the cpu address bus actually means?

I'm currently running NOP on a Z80A cpu. All it does it flash some led, I expected it to flash 1 by 1. The led are place from address 16-0
8
votes
2answers
2k views

Was it Microsoft that started the war between Application and OS vendors?

I think there is a long history of application vendors going to great lengths to complain or litigate against Operating System vendors to compete fairly. Specifically, I am talking about "fairness" ...
5
votes
1answer
134 views

Where are program datas stored on Windows Mobile 5.0?

I am probably a decade late with this question, but anyway. I digged out a PDA with Windows Mobile 5, and installed SpaceTime Mathematics on it. It is a 30-day trial (and you can't purchase the ...
11
votes
1answer
2k views

Which C64 games support two buttons?

CIA 6526 chip used in Commodore 64 is capable of controlling two separate joystick buttons. But the second button should be connected through paddle pot input. This option was not popular till the ...
25
votes
6answers
11k views

Windows 98 with 2GB of RAM

I have assembled a retro-gaming PC out of an old Shuttle SN45G with a Windows 98/Windows XP dual boot. The motherboard can handle 2GB of RAM, but apparently Windows 98 can only handle 1Gb. Windows ...
10
votes
2answers
327 views

Order of powering down Atari ST and hard drive?

I am wondering if the order is important, which do I turn off first? The Atari ST computer or the external hard drive attached to it? It is on an SCSI adapter.
8
votes
2answers
443 views

What operating systems allowed arbitrarily-sized disk blocks?

According to my limited experience with IBM clone mainframes, and as far as I can remember, at least in one OS the permanent storage disk space was allocated to users (and the scratch space — to ...
10
votes
2answers
2k views

Documentation on Windows Explorer Shell Command Files

Windows Explorer Shell Command Files are a feature added to Windows with Internet Explorer 4 (95 / NT 4). They were used in the now-defunct Quick Launch bar to show the desktop, open IE4's Channels ...
2
votes
1answer
1k views

What systems used hard sectored floppy disks?

Which computer systems used hard sector indexing of floppy disks? Background: On 5 1/4" and 8" disks there is a hole punched into the disk used for optical timing to locate the start of sectors. ...
18
votes
3answers
880 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 ...
9
votes
1answer
327 views

Apple II SCSI: Maximum drive / partition size?

Using an "SCA to 50-pin adapter", it is possible to use a 300 gig Ultra-320 SCSI drive from 2004, with an Apple II outfitted with the Apple SCSI controller. It seems possible for the electronics to ...
9
votes
1answer
406 views

Does this Nova rack have historical value?

I wish to modify my rack, in order to mount some modern rackmount servers. Am I damaging a piece of history and will incur the wrath of historical computing librarians ? It is an old 19" rack that ...
8
votes
3answers
9k views

How can I upscale the video output of a Nintendo 64 for low-latency and high quality graphics on an HDTV?

Say I want to hook up a Nintendo 64 console to an HDTV via HDMI or Component. What are my options for upscaling hardware to be able to play the system without low quality or blocky picture and with ...
36
votes
4answers
3k views

How did “Ballblazer” pull off fast, smooth, first-person, solid-model 3D on Atari 8-bits?

I remember the first time I saw Ballblazer, the 1984 game, running on a friend's Atari 800. The split-screen 3d graphics and fast action blew my socks off. Looking back, I get the impression there ...
7
votes
2answers
7k views

Windows 98 / XP Dual boot

I have acquired an old Shuttle X PC (Windows XP, Mini-DTX form factor HTPC) that works fine. As I can't do much with this form factor (I can't fit a modern motherboard in the case) and that the ...
45
votes
4answers
7k views

Why would older video games include fragments of source code?

One thing that was surprisingly common in older video games (around the same era assembly language was king) was the inclusion of uncompiled, plaintext source code in the ROM. You can see many ...
13
votes
3answers
649 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 ...
11
votes
1answer
942 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 ...
9
votes
3answers
362 views

Will careful restoration of a retrocomputer's paint job enhance its value?

First off, I'm not talking about painting my plastic C64 in Ferrari Red! While this may look cool, I'm sure any value enhancement of the machine would be based purely on 'taste'. I have a NeXT Cube, ...
21
votes
4answers
4k views

What was the first piece of software to be called an engine?

Nowadays I hear a lot about graphics engines, game engines, physics engines etc. but don't remember the term being used much, if at all, back in the 80s and the 8-bit era. I'm not including Charles ...
21
votes
3answers
6k views

Is there a simple way to display ANSI art and animation files in a modern terminal window?

ANSI art and animations were prevalent on BBS systems in the late 80s and early 90s, and the ANSI art scene continues to thrive today. There are thousands of ANSI art files, with usual extension .ans, ...
88
votes
6answers
8k views

Were there 8086 coprocessors other than the 8087?

The 8087 math coprocessor for the 8086 (and descendants) nominally added floating point and transcendental (trigonometric and logarithmic) instructions to the 8086. Contrary to naive expectations, the ...
5
votes
4answers
1k views

1980's PC educational game where you build robots

I don't remember anything else from this game except it was in the late 1980's in my school and I was playing it on something with a scrollball, and you basically build robots and did science ...
93
votes
16answers
21k views

Does “Disk Operating System” imply that there was a “non-disk” Operating System?

In the 1980's at primary school we saw MS DOS and DR DOS competing before Windows 3.1 and subsequent releases took over that space. At home we had Apple II's which booted up to a BASIC prompt. On ...
11
votes
3answers
3k views

How can a ST-412 MFM hard drive be integrated with a modern PC?

I have a Seagate ST-225 20MB hard drive. It used a ST-412 MFM (Modified Frequency Modulation) controller which unfortunately went to the great bit bucket some time ago. Is it possible to get this ...
33
votes
2answers
1k views

What BBC Microcomputer features were requested specifically by BBC engineers?

When requirements for the BBC Microcomputer were developed as part of the BBC Computer Literacy Project, an outline specification was created by an independent consultant, the late John Coll. This ...
40
votes
1answer
4k views

What computer system is this from 1984 Doctor Who?

In the 1980s, the popular BBC science fiction series Doctor Who used some real computer system(s) to display impressive (for the time, OK, maybe not!) graphics. They actually ran the software real-...
79
votes
9answers
9k views

What key factor led to the sudden commercial success of MS Windows with v3.0?

Microsoft Windows was originally introduced in 1985, ostensibly to compete with the Apple Macintosh, and other computers shipping with graphical shells by that time. However, early versions of Windows ...
10
votes
1answer
700 views

Can the IBM PCjr be upgraded to support the better features of the Tandy 1000?

It is well known that the IBM PCjr was a commercial failure and that the Tandy 1000 series of computers not only matched the features of the PCjr (other than maybe the wireless keyboard), it also ...
19
votes
2answers
5k views

Which original retrocomputer OS's are still maintained and updated today, for original hardware?

I would like to know which original Operating Systems that run on retrocomputers are still being actively maintained and updated. This only applies to retrocomputer OS's that may still be used on ...
12
votes
2answers
1k views

How did Ceefax work?

Ceefax was a service that provided a series of pages of coloured text in a format similar to a 40-column display to a compatible television set. Each page was numbered, and you could address each page ...
22
votes
4answers
3k views

What conventions and language extensions did people use to program the 8086 and 80286?

The 8086 is a 16 bit processor with a 20 bit segmented address space, famous for being used in the IBM PC. It is also infamous for being tricky to program for. I am currently writing what is ...
35
votes
6answers
4k views

Why does the Commodore C128 perform poorly when running CP/M?

I have seen several claims of poor performance of the C128 when running CP/M, and would like to better understand these claims, especially in comparison to other CP/M machines of the early to mid-...
9
votes
1answer
536 views

Boot Macintosh Quadra 800 from System 7.6.1 CD

I dug out an old Macintosh Quadra 800 that I've had on my shelf for a long while. I'm not even sure where I got it anymore... After a quick look in my VGA adapter bucket, I found I had the needed ...
13
votes
4answers
1k views

Were there VLB cards other than video cards and SuperIO controllers?

VESA local bus was an expansion bus used to overcome speed limitations imposed by ISA bus. In theory VLB could reach 1280 Mbit/s (with 40 MHz CPU) which was way more than ISA's 66.7 Mbit/s. The speed ...
9
votes
3answers
717 views

What is the first computer architecture that knew code from data?

The CPU being able to tell code and data apart to prevent inadvertent or malicious execution of data as instructions by trapping (even if the bit pattern of the data can be interpreted as a valid ...
2
votes
1answer
397 views

PS2 slim disk won't spin [closed]

So I've been wanting to get into modding consoles. Today I put in some 3mm leds. I put them under the usb ports and controller ports. So I get done with it and put in a game to make sure it works. ...
9
votes
2answers
590 views

Can I use my IBM P/N 93F0502 (circa 1992) monitor in a dual monitor setup with my modern Mac Mini or Thinkpad?

I have an old IBM monitor here and I'd like to use it as a second screen to my computer (Mac mini running Fedora or Thinkpad running Archlinux). I plugged it into the electricity socket without a ...
6
votes
2answers
104 views

Will this Acculite laptop boot without HDD?

First I'd like to ask: Does anybody even know of this laptop? I was surprised to find 0 information about it online. I've was asked to see if I could get this thing to boot, but it was in rough shape. ...
14
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 ...
10
votes
2answers
698 views

Did the ZX Spectrum have more original titles than C64?

From casual reading, it seems as though many C64 titles were ported from the ZX Spectrum. Why was this the case? Was the ZX Spectrum more popular? Or easier to develop for?
7
votes
4answers
628 views

How did a punchcard-based test-taking system work?

A punchcard (in 3 fragments) has been found in a copy of Computer Programming: A Mixed Language Approach by Marvin L. Stein and William D. Munro (1965). If my guess is right, a test-taker would write ...
11
votes
4answers
601 views

How was parity used with modems?

On the back of this question which talks about 5 and 6 bit communications, I remember back in the BBS days that it was common to set your terminal to 8N1, (a.k.a. 8 bits, no parity, 1 stop bit) to ...

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