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5
votes
6answers
707 views

Amiga game about a detective or a spy in some kind of hotel building

There's a game I played as a young child in the 90s that I am 99% sure was on an Amiga. I've searched high and low and cannot find it, and am beginning to wonder if my memory is not accurate. I ...
3
votes
0answers
177 views

What would "Special Makeup" design have been in the 1988 arcade game, Splatterhouse? [closed]

Upon beating the Namco arcade game Splatterhouse, released in November 1988, the following is shown in the credits along with the expected programmers and artists: SPECIAL MAKEUP DESIGNED ...
5
votes
1answer
248 views

Why didn't Japanese N64 cartridges fit in American consoles?

Back in 1998, my father was living in Japan and sent me some N64 cartridges. Surprisingly, they wouldn't fit in my American console because the back of cartridges didn't match the slot. Articles on ...
28
votes
1answer
4k views

How did anti-Y2K-bug boards work?

During the Y2K bug hype, I remember seeing a store announcing some kind of board that one would connect to the motherboard of a PC and the problem would be fixed. Were these devices legit and, if so, ...
1
vote
0answers
85 views

Timer B Interrupt occurs only once

I was following this tutorial on Commodore 64 timer interrupts and tried to replicate it (except all I was planning on doing was changing the border color.) I noticed that my interrupt only occurs ...
9
votes
2answers
496 views

What did Richard Stallman have against VMS?

Richard Stallman of course was an advocate of free software, and VMS was proprietary, so he would've disapproved of it on that basis alone. (To be clear, I am not discussing here whether he was right ...
11
votes
3answers
1k views

How were 18-bit instructions encoded in paper tape?

Early 18-bit computers like PDP-1 were based on 18-bit instruction sets, and used punched paper tape for storage etc. As far as I know paper tape was usually 8 holes, which works nicely with 16-bit ...
6
votes
1answer
430 views

Did ancillary LEDs trade arcade game design for manufacturing cost?

Looking at the 1974 arcade game Speed Race, I notice that the cabinet includes ancillary LEDs to show the scores. https://flyers.arcade-museum.com/?page=wide-flyer&db=videodb&id=4056&image=...
17
votes
6answers
1k views

Is there any hard data about type-in programs in the 80s?

In the 1980s, type-in listings were a staple of many home computer magazines[1]. This suggests that they added value to the magazine, and that people did actually type them in. On the other hand, ...
9
votes
3answers
2k views

Was there ever a microcomputer with a full-size keyboard and a hex numpad?

I'm aware of some early/super hobbyist microcomputers that came with ONLY a hex numpad (that is, no letters beyond F/no punctuation). I'm also aware of home microcomputers that had the usual decimal ...
2
votes
2answers
562 views

Can DES be implemented with the technology of the 20th century? [closed]

Can the cryptographic algorithm DES be implemented in a electromechanical machine with the technology of the early 20th century (1900-1938)? Important Note With technology of 1900-1938, I refer to ...
3
votes
1answer
296 views

Why was Atari Tank less cloned?

The first commercially successful arcade video game was Pong in 1972. According to https://en.wikipedia.org/wiki/Arcade_video_game the number of units eventually sold was about 19,000. (A lower figure ...
9
votes
0answers
509 views

Does anyone have a DG Business BASIC manual?

archive.org's DG collection has Single User BASIC and Extended BASIC manuals, but no BB manual. Does anyone have a PDF? The underlying question... the earliest mention of BB I can find is from a 1977 ...
14
votes
1answer
2k views

What is a good COBOL specification to target when aiming to support ~75% or more of mainframe and minicomputer software bases?

There are many specifications for COBOL due to its long history. If one wanted to write software that would be acceptable for use in about 75% or more of existing COBOL projects on mainframes or ...
2
votes
1answer
131 views

How to connect remote Windows XP PCs to one VPN using linux VPS in 2021 [closed]

I want to connect 2 (or more) Windows XP computers from different networks to a mutual virtual network. Also I have a VPS with a modern linux distribution with a public IP. I want to install some VPN ...
3
votes
1answer
178 views

Did any 6502-based system with cycle-stealing memory access steal the first available read, rather than asserting READY three cycles early?

On the 6502, the READY signal may be used to extend read cycles indefinitely, but will have no effect if asserted during write cycles. As a result, many devices that need to steal cycles from the CPU ...
16
votes
3answers
4k views

What is the simplest UNIX system with a MMU?

I was recently looking at a Motorola 68010 and 68451 that have been in some ESD foam on a shelf for a very, very long time. Now, things are all so huge in memory, but BSD4.4-Lite can run in only 256k ...
0
votes
0answers
129 views

Please identify this old soccer game with "speaker" on c64

In "modern" games(Fifa 98, Fifa 2000, PES, etc) you can hear the speaker talking about match. This was near impossible in c64 era, but I remind a soccer game with a speaker with phone and ...
10
votes
2answers
1k views

Does Game Boy Color have *perfect* simulation of original Game Boy games?

In recent years, I've learned that the Super Game Boy peripheral for the SNES did not run Game Boy games at the exact right speed; they were slightly faster. Now I'm worrying that the same (or ...
5
votes
0answers
168 views

Identify C64 Game About Firemen

I'm searching for an old game for the C64, it was about a group of firemen. I last played it in the 1989, 32 years ago, so I do not remember it very well. I remember only that the firemen don't want ...
19
votes
2answers
2k views

How do I connect a command prompt to a serial line in MS-DOS 6.22?

I am currently experimenting with DOS and am trying to run the command prompt on the serial terminal through QEMU. This is the command I have been using. command >COM1 2>COM1 <COM1 This ...
6
votes
0answers
326 views

The first micromouse competition in 1977 had 6000 initial entries, what would the majority of them have been (e.g. wall followers)?

The first micromouse competition in 1977, had 6000 initial entries, what would the majority of them have been (e.g. wall followers)? Note - In the link above, first micromouse competition in 1977, it ...
-1
votes
3answers
331 views

What is generally accepted as being the first machine implementation of a search tree?

What is generally accepted as being the first machine implementation of a search tree (as they are more commonly known and used in modern computing for things like solving or powering, mazes, checkers,...
19
votes
2answers
4k views

What is this game featured in the film ‘The Year of the Jellyfish’?

In the 1984 movie The Year of the Jellyfish, featuring Valerie Kaprisky, at 00:13:42 we see her play a video game on a console like an old Atari, Philips, etc) Does someone know which console or ...
28
votes
1answer
6k views

Why did Nintendo 64 (1996) memory cards require a battery inside them to retain data whereas the PlayStation (1994) ones did not?

The Nintendo 64 was released in 1996. Its "Controller Pak"s, which was the name of the memory card that you put inside the controller to save the progress in certain games, require a battery ...
7
votes
1answer
808 views

Did the Motorola 6847 have any memory onboard accessible to the user?

Did the Motorola 6847 (Video Display Generator) have any memory onboard accessible to the user? Looking at this video display generator, which was used in the MC-10 (TRS-80 MC-10 Computer), if memory ...
5
votes
3answers
520 views

Definitive list of music bands/groups that included computer programs on their analogue audio music physical media releases (LPs, singles)

Is there a definitive list of music pop/rock bands/groups that included computer programs as part of their physical analogue audio music releases? (vinyl LPs, EPs, singles) etc? For this to be ...
28
votes
1answer
3k views

Did INI files work in a different way on Windows 3.x than today?

I am dealing with an application that still uses INI files for configuration. I wanted to make a temporary change to an INI file, but the result was not what I expected. Let's say the original INI ...
20
votes
3answers
2k views

Can powering on/off a 1541 damage a disk left inside?

The User's Guide for the Commodore 1541 disk drive includes a vague warning, on page 7, to "remember to always remove the diskette before the drive is turned off or on". Some third-party ...
2
votes
2answers
906 views

How did Unix handle multiprocessing when virtual memory didn't exist?

It seems the first "real" virtual memory management system was the i386 with its powerful paging system that totally isolates processes. How did Unix work before this, ensuring no process ...
23
votes
3answers
6k views

Why might Quake run slowly on a modern PC?

I noticed back in the DOS gaming era that DOS games ran slowly in hi-res modes. I was surprised to discover that this could be true on a modern machine. I booted a 2017 i5 7200u (I think) laptop into ...
13
votes
1answer
601 views

Z80 refresh pin, is it tri-state or not

I'm planning out a protocol bridge between ZX Spectrum clone system bus and an FPGA-based extension device. I am considering adding bus request/acknowledge support for DMA purposes, but reading "...
3
votes
1answer
165 views

How is a bus request initiated on the VME bus?

I am looking into creating a multi-processor "VME-like" system as a challenge and "because why not". I say VME-like because it probably wont be a strict VMEbus implementation, but ...
5
votes
1answer
368 views

Where within the Internet Explorer 4 installation files can I find the browser error pages?

Is it possible find the default error pages (e.g., bad request, forbidden, not found, gateway timeout, etc.) for Internet Explorer 4 within the installation files or even the Windows 98 CD? I'm ...
5
votes
2answers
672 views

Why did third-party PlayStation memory cards forget/delete saves?

The original PlayStation did not have any writable memory, so you had to buy "memory cards" that were plugged into the front in order to save game progress. Sony sold official cards. But ...
1
vote
0answers
145 views

How to adjust RGB in an old CRT monitor (Samsung SyncMaster 753s) where the on-screen controls do no have the provision?

I just love CRTs. The have used LEDs and LCDs monitors but non of them have the high quality picture which a CRT monitor produce. In CRTs the color reproduction is very nice and also the brightness ...
13
votes
3answers
3k views

When was the 6502 second sourced?

According to https://en.wikipedia.org/wiki/Second_source MOS Technology licensed Rockwell and Synertek to second-source the 6502 microprocessor and its support components. This makes sense; the 6502 ...
12
votes
1answer
2k views

How do retro supply stores prevent the controller rubber replacement parts from "expiring"?

My NES controller felt really awful. After ordering replacement rubber parts from a store, unscrewing my controller and replacing the original rubber parts with the new ones, it felt "like new&...
8
votes
1answer
349 views

Meaning of KP_Begin and VK_CLEAR names of numpad 5

The key "5" at the standard keyboard numpad ("keypad" in XFree86) is named KP_Begin in XFree86 and VK_CLEAR in Windows virtual key space. What are these names originated in? Are ...
9
votes
1answer
782 views

Why did the Sharp X68000 use 5.25" drives?

The Sharp X68000 came with two 5.25" floppy drives. Later models moved to 3.5" drives. Why did Sharp choose 5.25" over 3.5"? When the X68000 was released in 1987, 3.5" drives ...
12
votes
1answer
436 views

Unknown device in MANIAC I machine room

In my answer to the question about the LANL MANIAC I posted a picture of it in its natural habitat. In the picture there's a mystery device electrical-taped to one of the columns by the system ...
20
votes
1answer
2k views

Is the MANIAC in the movie 'The Magnetic Monster' the real MANIAC computer?

I just watched the movie The Magnetic Monster, which is a 1953 science-fiction thriller. The main premise is hokum, but there's an amount of reasonable-seeming background "science" around. ...
6
votes
1answer
313 views

Why did the Atari 5200 revert to only two controller ports?

The Atari 5200, released in 1982, had four controller ports, an unusual feature which as far as I know had never been seen before, and would not be seen again until the late nineties. The 1983 ...
7
votes
1answer
262 views

What hardware was used for Magic circa 1985?

Magic, which is described as a "smart" layout system for integrated circuits, was open-source and available by the end of 1983. As far as hardware and OS requirements, early documentation ...
8
votes
2answers
1k views

How did the 6502 designers intend for the indirect addressing modes to be used?

The 6502 has three indirect addressing modes: Indirect, Indexed Indirect (Indirect,X) and Indirect Indexed (Indirect,Y). Indirect is only used on the JMP instruction, no other. Why was this mode ...
1
vote
2answers
438 views

Why did the description of the Windows shutdown command imply power-off was manual even with ACPI available?

The description of the ‘Shut down’ option in earlier versions of Windows reads: Ends your session and shuts down Windows so you can safely turn off power. Why was this shown in Windows 98–XP even ...
15
votes
1answer
829 views

Was there any software on the IBM PC that specifically took advantage of the NEC V20?

Back in the day I remember friends upgrading their IBM PCs (and compatibles) with a NEC V20 CPU. While this was mostly to get a bit more performance out of their machines over the stock Intel chip, I ...
16
votes
3answers
3k views

Can the 6502 clock be changed on the fly?

I was wondering if the original NMOS 6502 has any timing limitations on changing the clock rate during operation? I ask, because the CSG 8502 version could "run at double the clock rate of the ...
5
votes
1answer
471 views

Copy content between floppy disks on Apple II

I own an Apple IIe with the Apple DuoDisk device. I've been trying to find out if it is possible to copy content from a floppy disk inserted into the disk 1 slot into a floppy inserted on the disk 2 ...
12
votes
1answer
710 views

How common was MADSEL?

I recently completed a software disassembly of the 1980 coin-op arcade game Missile Command. I'm curious whether a feature of the hardware is unique or commonplace. First, a bit of background: ...

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