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5
votes
3answers
726 views

Why did the assigned goto statement in Fortran need a label list?

FORTRAN had an 'assigned goto' statement. Firstly, a statement number is assigned to a variable: ASSIGN 42 TO L Subsequently, one can obey GOTO L which (given the preceding ASSIGN) would transfer ...
3
votes
3answers
257 views

When and Which (PC) Keyboards Introduced Browser and/or Multimedia Keys to Windows

Background: Multimedia/Internet keys are additional function keys on PC keyboards that either invoke specific applications like browser, e-mail, media player, etc. or invoked certain function for ...
17
votes
2answers
2k views

When did FORTRAN decide on signed integers?

I have personally always been of the opinion that it would make sense for the default integer type to be unsigned, though it's been a long time since that would've been a live issue for debate; C in ...
19
votes
17answers
5k views

8-bit home computers without BASIC

All the 8 bit home computers I'm aware of, had BASIC in their ROMs. A notable exception was Jupiter Ace, a british home computer, which used Forth. Were there any other 8 bit home computers that came ...
23
votes
2answers
11k views

What is the massive CD drive used in the movie “Licence to Kill”?

In the movie Licence to Kill, James Bond breaks into Felix Leiter's house and gets a CD out from behind a picture. He then sticks a CD in an absolutely massive CD drive. It was about three times the ...
6
votes
1answer
325 views

Was it ever possible to access the full EGA color space in 200-line modes?

It's long been an established fact that the EGA only had four memory planes, which limited the number of colors on the screen to (24) 16. The best compatible monitors at the time had six TTL color ...
7
votes
1answer
306 views

Why does the GUI for the built-in PlayStation CD player look so weird in the latest AVGN episode?

I had a PlayStation. Not some "slim" version or "late-era model". The original. The real one. It had a built-in CD player with a rather elegant, if "blocky", GUI. In the ...
1
vote
0answers
63 views

Expansion Port & Final Cartridge et al - Are they just programs in ROM, or is there more to it? [duplicate]

For the C64, there are a lot of emulation devices floating on (Euro) ebay that allow you to load programs from SDcard via emulated serial floppy or/and tape interfaces, simulating the insertion of a ...
2
votes
0answers
140 views

Has anyone heard of SCHEMA page layout tool?

I've found a text formatting tool, under the name of SCHEMA, which would accept an input language like *RED *0STA*NN*RG*1RL*0MCS1 20 *3/ *MDLorem ipsum dolor sit amet, *MDconsectetur adipiscing elit, *...
1
vote
0answers
93 views

Does Workbench 3.1 have access to CDTV CD Rom

Is it possible to boot Workbench 3.1 on CDTV from floppy, provided Kickstart was updated to 3.1 and still have access to CD Drive from WB or does it require disabling Extended Rom altoghether?
-1
votes
2answers
193 views

What does “cycle-accurate emulation” mean? [duplicate]

Note: I've attempted to ask this question several times in the "Arqade" category. Just like with the "History" category, anything I ask there is deleted by their broken bots soon ...
20
votes
5answers
3k views

What kind of television set would work with the Commodore 64?

I found out all my SmartTVs don't work because they are too modern for my old computer. I am a young owner of a Commodore 64, so please bear with me as this machine is a decade older than me. I do ...
0
votes
1answer
109 views

Any Public Videos of Anyone Playing Jupiter Mission 1999?

When I was growing up, I played a game for the Atari 800 entitled "Jupiter Mission 1999", which has as a premise that you wake up in the middle of the night with astronauts at your door and ...
5
votes
1answer
392 views

On Amiga, what happens when I write to $DFC5A0 by mistake?

I'm fixing a game (TV Sports Basketball) that tries to write in audio data (using the range $DFF0A0 to $DFF0D0) but for some reason (bad programming), the index is sometimes (not always) bogus MOVEA.L ...
5
votes
2answers
791 views

Why are there three different settings in the [Paths] section of MSDOS.SYS?

In Windows 9x, the MSDOS.SYS configuration file contains a [Paths] section whose contents usually look like this: [Paths] WinDir=C:\WINDOWS WinBootDir=C:\WINDOWS HostWinBootDrv=C Both WinDir and ...
63
votes
5answers
9k views

Back in 1984 I wrote some games for Spectrum - Will they still be playable?

Back in 1984, I was commissioned to write some games for ZX-Spectrum. They were sold together. To my amazement I found that someone is selling a copy online. I thought of buying it but it is in the ...
26
votes
1answer
2k views

When and where did the $ convention for hexadecimal literals originate?

I found this question asking about the origin of 0x to denote hexadecimal to be interesting. However, when I cut my teeth programming on 8-bit 65xx systems in the early 80's everything I saw used a $ ...
43
votes
1answer
5k views

Where and when did the `0x` convention for hexadecimal literals originate?

By the early 1980s, C was using 0x as a prefix to indicate integer literals expressed in hexadecimal, e.g., 0xCAFE. This did not exist in B as of 1972, though B did support octal integer literals via ...
5
votes
1answer
267 views

Sega Genesis and Sega CD interaction

Sega must have thought about upgradability prior to the Genesis’s release, as there is a expansion slot to the right of the unit when looked at from the front. Is this the only expansion slot? Is it ...
3
votes
1answer
154 views

Does anyone have information about the nj32disk.sys driver?

I'm currently trying to use the nj32disk.sys driver to use my USB stick as a virtual hard drive. The problem is that the driver acts like a floppy disk. My question is: Is there a documentation about ...
6
votes
2answers
727 views

What was the first microcomputer capable of working with Japanese kanji?

Apparently the first microcomputer capable of working with the Chinese language in Chinese characters was the Microprofessor II (or MPF-II-C), a Taiwanese Apple II clone from 1982. Now I'm 99% sure ...
7
votes
1answer
1k views

Which was this game with collectibles, that came with a washing machine detergent?

Availability I most likely played it in the late 90s (1997+). It might have been the early 2000s as well, but it's less likely. My computer at the time was running Windows 95 or 98. The game came on a ...
15
votes
2answers
2k views

Looking for information on a programming language called WhatDoesItDo

I am looking for information on a training language called "WhatDoesItDo". It was used in 1978 at Austin Community College on a Motorola 6800 CPU. If anyone has any information, I would ...
15
votes
2answers
2k views

What is the oldest reference to PEEK, POKE, and USR?

I've been reading manuals for BASIC implementations and the earliest reference I can find to PEEK, POKE, and USR is in the Altair BASIC 3.2 manual, published in 1975. This morning I came across this ...
20
votes
1answer
2k views

Who ended up owning Commodore's semiconductor IP?

The question of ownership of Amiga-related intellectual property post-Commodore is famously difficult to answer. My question is: does anyone "own" Commodore's semiconductor IP now, and if so,...
10
votes
3answers
975 views

How can I understand numerical precision of values in Microsoft BASIC (on the Dragon 32)?

I implemented a differential equation solver on my Dragon 32 (which uses Microsoft Extended Color BASIC) but the results I get quickly diverge from those I expect, which are the same as those I get ...
12
votes
1answer
4k views

Is this an Amiga? If so, which model?

In the 1998 Swedish comedy musical "Åke från Åstol", there's a moment toward the end when a man is pushing around some sort of Amiga-looking computer with a monitor and mouse on a ...
12
votes
1answer
487 views

How did Sony, Panasonic and Mitsumi CD-ROM drives differ from the later ATAPI standard?

In the early days of computer CD-ROM drives, aside from SCSI interfaces, there were a number of proprietary interfaces developed by individual manufacturers. This was exemplified by PC sound cards ...
8
votes
6answers
7k views

Why do keyboards with a NumPad repeat the numbers?

This question is related to this one. I realise not all keyboards have the NumPad, but why do those who do have a NumPad have two sets of keys for numbers ( the numbers above the letters and below the ...
3
votes
3answers
1k views

Connecting old Floppy Drive to modern computer

I need a way to write on floppy disks from my modern PC (motherboard GIGABYTE z730p). I own a Panasonic JU-257A606P I took from an old machine of mine, and before buying a USB floppy drive I wanted to ...
6
votes
1answer
141 views

What floppy disk format and layout and what disk image format are used for the Coleco Adam?

I just found out that emulators for the Coleco Adam use a disk image file format with the DSK file extension. This is a very very overused extension on many different disk formats. Though a few DSK ...
18
votes
3answers
4k views

Is the Coleco computer from The Simpsons based on a real computer?

In the episode Lisa Gets an "A" of The Simpsons, there is a fictional computer called Coleco: Is that computer based on a real one or are there any records of computers resembling that?
1
vote
1answer
251 views

N64 displays dark picture with barely recognisable contours

I'm trying to hook up my EUR N64 to a TV that handles both Composite and RGB SCART alright (A1200, CDTV, Megadrive). The picture is very dark and I can only make out the shapes and contours. There is ...
5
votes
1answer
213 views

Why are the CBM control codes for color setting so spread out?

The control codes (my C64 handbook actually calls them ASCII codes) for color changing on the Commodore 64 are as follows: Color Control Code Color number BLACK $90 0 ...
3
votes
2answers
418 views

Was it possible to win the “Lunar Lander” game with less fuel than the default?

A while ago I asked about the possible origin of a Russian version of the "Lunar Lander" game. No definitive answers were given. Meanwhile, I was able to decompile the binary into a semi-...
34
votes
4answers
3k views

How did musicians acquire samples for tracker music (MOD, S3M, XM and the like)?

Many songs in the so called "tracker" format quite popular in the early 90s (think .MOD, .S3M, .XM, .IT and the like) seemingly used sound samples from real synthesizers. This sometimes ...
0
votes
2answers
234 views

ZX Spectrum red stripes during loading

When we load any game on ZX Spectrum from cassette player... Should red stripes move smoothly for better result or they should be static for perfect result? What is the theory?
2
votes
3answers
187 views

Where to find a Toshiba T1900, T1910,T1950,T1960 laptop fdd drive cable, non standard 26 pin flex flat cable (ffc)?

I was trying to take apart a Toshiba T1950ct laptop to replace slim floppy drive:s belt. Unfortunately, I broke the delicate flat flex cable (ffc) which is non standard 26 pin floppy cable. ...
3
votes
1answer
248 views

When did the faster versions of the NMOS 6502 become commercially available?

The 6502 was released in 1975 with an advertised speed of about 1mhz but I can't find reliable information on what year faster versions became available (was 2mhz possible at launch?) or what the true ...
4
votes
4answers
426 views

Would some BASIC interpreters for microcomputers be considered operating systems?

As software for micros developed, you could use the BASIC interpreter just to CLOAD and RUN assembly language programs. Those might call BASIC ROM routines (say, for converting ASCII input to binary ...
7
votes
1answer
1k views

What is the point in interpreting an integer literal differently depending on the machine?

I was reading the user manual for an old program "UNRAVEL": http://www.ml1.org.uk/pdf/Unravel_User_Manual_1971.pdf. On page 9, it describes the syntax for integer constants: Unsigned ...
2
votes
2answers
242 views

What is a 4002's “RAM Status Character”?

I was looking at this emulator of a Intel 4004, and I noticed something with the RAM. It had something called "Status Chars". There were 4 of them per memory line and all were 4-bit numbers ...
0
votes
1answer
113 views

Carry flag in the Intel 8008

Datasheet for the Intel 8008 CPU mentions that the Carry (C) flag is affected with the logic operations (AND, OR, XOR), but it does not make any sense. I believe Carry will be zeroed, but I have no ...
3
votes
1answer
302 views

Intel 8008 stack behavior

Intel 8008 CPU has an internal stack, implemented as an 8 x 14-bit scratchpad. How does it work exactly? Is there any "invisible 3-bit stack pointer"? I want to know what happens when the ...
4
votes
0answers
163 views

Undefined opcodes for the Intel 8008 CPU

What happens when I8008 CPU reads the "undefined" opcode (22h, 2Ah, 32h, 38h, 39h, 3Ah)? Are these opcodes evaluated as a NOP instruction, or lead to some side effects (RESET, etc). How many ...
1
vote
1answer
95 views

Help in finding signals on schematics

Where are the missing signals that I can't pair between amiga external drive connector and gotek drive? I'd like to connect GOTEK to CDTV, there is a way to do it directly (caddy died), but I can't ...
5
votes
2answers
263 views

Commodore Plus/4 jiffy clock tied to screen refresh frequency? (warning: flashing images)

Warning: There are flashing images below, do not scroll down if you are sensitive to them! According to various sources (for example this for the Plus/4), both the C64 and Plus/4 have a "jiffy&...
3
votes
2answers
205 views

Is there a way to blank out a portion of a screen on Commdore C64?

I would like to blank out a couple of lines between two given rasterlines. Above that I'm planning to have a scrolling background and sprites, below that is a textual info area. I'm thinking of a ...
2
votes
2answers
587 views

Were the 80s more educational on IT? [closed]

I keep telling to everyone who wants to hear it (or not) that my personal IT education as a kid in the 80s was superior to what kids are exposed to today (to the degree that I can observe that as a ...
5
votes
2answers
279 views

Were the VAX eXtended Function Control (XFC) instructions ever used commercially?

The DEC VAX has a set of 256 instructions set aside for user addition via microcode edits. Were extension sets ever commercially produced and sold, or was this functionality mostly used in-house? ...

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