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8
votes
1answer
627 views

Why did the C64 use a separate “CAN” +5 V power supply for some chips?

The Commodore 64 had two separate +5 V power supplies: one supplied by the external PSU brick and a second one generated on-board from the 9 VAC via a 7805 regulator. This second +5 V power supply was ...
5
votes
1answer
2k views

Is this a mini computer, a novelty monitor or something else? [closed]

I saw this in the background of a video and I'm wondering what kind of device this is. It looks like a small pink CRT monitor with some keyboard-like buttons and was playing an animation.
1
vote
1answer
79 views

How can I fix this clacking sound made by the Game Boy speaker?

I have a Game Boy, and whenever it tries to play sound, the sound is very quiet but there's a loud clacking sound. Here is a sample. In this case, it is Tetris Attack playing: https://soundcloud.com/...
4
votes
1answer
98 views

Why does _Beneath Apple DOS_ show FM encoding rather than GCR?

From the beginning in 1978 the Apple II floppy disk system used GCR encoding to convert data bytes to sequences of binary values to be written to the diskette: first 4-and-4 encoding (never released), ...
-1
votes
0answers
72 views

How do I find a joystick that works with Windows XP [closed]

Logitech Wingman 3.25C with joystick told me that is uses windows 95 or 98 (98SE was not mentioned) only. So I can't get Windows Flight Simulator 98 to acknowledge it with my old Windows XP, because ...
17
votes
3answers
3k views

Could you manually eject a floppy quick enough to prevent data loss?

I have the vague recollection of "Panic Ejecting" floppy disks by lifting the latch on the drive after immediately regretting a command I had typed. At the time, I was young, impulsive, and blessed ...
7
votes
0answers
83 views

What is the protocol for bootstrapping a Game Boy Advance over a link cable?

One of my favorite features of the Game Boy Advance growing up was the ability for some games to be played multiplayer with just one cartridge - the first player would have the cartridge and all the ...
46
votes
4answers
9k views

Why were most PC's and electronics beige back in the day?

Back in the day (especially during the 70's and 80's) it seems that most computers and electronics were colored 'beige'. It seems it would be easy to use different colors, so why didn't they? Some ...
4
votes
2answers
116 views

Mismatched floppy disk/drive reading and writing, what should one keep in mind?

Mismatched disk/drive refers to, for example, reading/writing a 720K disk with a 1.44M drive. Don't forget LS-120 and LS-240 SuperDisk drives, they can use standard floppies too. What can and can't ...
1
vote
4answers
304 views

Is the ZX Spectrum multithread capable?

I know the spectrum had the IM2 mode, but can I start multiple threads running simultaneously?
11
votes
2answers
1k views

How does Windows 9x determine which disk drivers correspond to which BIOS disks/DOS drive letters?

Windows 9x can employ two kinds of disk drivers: native protected-mode drivers and compatibility-mode DOS drivers, and the former are used in preference to the latter whenever possible. When Windows ...
19
votes
2answers
1k views

Does the “Amiga Client for Novell NetWare” exist?

On page 139 of Brian Bagnall's book "Commodore: The Final Years", there is the statement that at CeBIT Hannover in March 1989, Commodore announced (amongst other things) "Novell Netware for Amiga". I ...
0
votes
4answers
254 views

What is the earliest implementation of the stack data structure in C? [closed]

I am trying to find the source code for the earliest implementation of the stack data structure in C, but I can't find anything. I am particularly interested in knowing if the member variables of the ...
-1
votes
1answer
87 views

Casio CW16 Typewritter [closed]

I am in need to refil my typewriter with more ink(this model uses ink ribbons), but in the place where I live they dont sell those ink ribbons anymore, I am considering to buy some cheap nylon ribbons,...
38
votes
6answers
6k views

How did old games from 8-bit era game consoles store music?

Some time ago I found that the audio of a game called Ninja Gaiden 1 (NES) is around 1 hour. This is excluding the sound effects like jump and hit e.t.c. Then I found that the entire game size is ...
0
votes
1answer
75 views

Keys on Omnikey Inverted T Ultra

On my Inverted T ultra keyboard, the SF9 key and the number pad asterisk (*) keys perform the same function; the num pad equal (=) key and the F7 keys are similarly tied together. I don't know if this ...
0
votes
0answers
30 views

Keys on Omnikey Inverted T Ultra Keyboard [duplicate]

Omnikey Keyboard I have an omnikey inverted T Ultra keyboard. The SF9 key and the number pad asterisk keys perform the same function. The num pad equal key and the F7 keys are similarly tied together. ...
0
votes
1answer
122 views

4MHz Z80 timing and PAL video generation

Im trying to get some nice colored lines on some old Z80 system synced to the PAL screen, but having some sort of a problem. First I just need to know if my facts are right. I know that on Commodore ...
0
votes
3answers
172 views

How did control characters work in real teletypes?

Emulated terminals can accept control characters, being able to move the position of cursor, to delete a char or a word or even to clear all screen, change foreground and background colors, etc. ...
32
votes
5answers
9k views

Why did early game consoles need the TV to be tuned to channel 3 or 4?

It just dawned on me that, when I was young, game consoles like the NES and SNES, and possibly other devices like VCR's, required the TV to be tuned to channel 4. I asked around, and some remembered ...
2
votes
3answers
131 views

How can I get cl65 to include its subroutines, like pushax and tosmulax?

This question is about cc65, which is a toolkit including a C compiler, assembler, linker, etc. All targeting various 6502 computers, like the various 8 bit commodores, the Apple II and whatever else. ...
2
votes
0answers
182 views

Price of original Apple ][ in 1980?

Apple introduced the "new and improved" Apple ][ Plus in 1979, but continued to sell the original ][ until early 1981. I speculate that some customers must have chosen the original Apple ][ over the ...
-3
votes
0answers
141 views

Was there ever a virus-proof customizable-software and/or customizable-hardware theory/design published which was proven would function successfully? [closed]

Was there ever a virus-proof customizable-software and / or customizable-hardware theory / design published which was proven would function successfully ? Theories that don't use quantum-cryptography ...
8
votes
2answers
759 views

What physical size and density floppies are the intermediate-capacity options for the /F switch of the DOS/Windows/OS/2 FORMAT command meant for?

In MS-DOS 5.0 and newer, PC-DOS 5.0 and newer, Windows 9x, Windows NT 3.1-2000, and OS/2 4.x, the FORMAT command (present in some form or another in literally every single version of Q/86-/MS-/PC-DOS, ...
-4
votes
1answer
107 views

What's a good gaming PC setup for the Millenium? [closed]

What would have been a good (but not overblown) gaming PC when you bought one for Christmas 1999? Let's say something better than 3/4 of gaming PCs sold at that time. I'm having a hard time ...
11
votes
2answers
250 views

Was the Commodore 128 movable zero page / stack and second block of color RAM actually used?

The Commodore 128 hardware allowed two things that weren't possible on the C64: Moving the 6502 zero page and 6502 stack to another place in RAM besides pages 0 and 1, and switching the CPU and/or the ...
3
votes
3answers
422 views

How to transfer the address of a data block into zero page using the Merlin 8 assembler on my Apple //e?

I've been fooling around with the Merlin 8 (v2.58) assembler on my Apple IIe and ran into a small snag. Basically, I would like to load the address of a block of data into a two-byte pair in zero ...
7
votes
2answers
693 views

What does Shift-RETURN do on Commodore's 8-bit computers?

Someone recently commented that, "a shift-Return is really different from a normal one. It moves the cursor to the next line, but does not complete an input operation." This would be interesting and ...
16
votes
3answers
2k views

x87 trigonometric instructions

The 8087 has instructions FPTAN and FPATAN, which are Partial Tangent and Partial Arctangent. The "partial" is presumably is to do with the range of the operands. For FPTAN the operand must be less ...
3
votes
2answers
213 views

IBM Mainframe APL internals?

The APL language used a unique set of characters, and additionally allowed overstriking of some characters on the terminal to form characters that were used in the language. When an APL workspace was ...
1
vote
1answer
81 views

Overstriking for APL on 3270s?

This question addressed the question of APL overstrikes on printing terminals. However, IBM also had 3270 video display terminals that supported APL, as well, and those, too, handled overstriking. How?...
3
votes
2answers
149 views

How exactly does the Apple II monitor set and use the “last opened” and “next changable” locations?

Chapter 3 of the Apple II Reference Manual describes the machine-language Monitor. On page 41 it describes certain remembered locations: The Monitor remembers the addresses of up to five locations. ...
77
votes
2answers
29k views

Is there any code in Firefox (as of 2020) that comes from Netscape Navigator?

Inspired by comments on the previous question Is it true that Netscape Navigator eventually became Mozilla Firefox? (Answer: Yes). In 1998, Netscape released a large amount of their existing source ...
2
votes
1answer
91 views

Printing on the graphics screen with lowercase/uppercase letters using CHAR command in Commodore BASIC 7.0

The CHAR command in Commodore BASIC 7.0 on the Commodore 128 allows printing a text at a given position on the screen. Other than the PRINT command, CHAR also works in Hires graphics mode. Since the ...
9
votes
1answer
495 views

Restore a BASIC program after reset or “NEW” command on a Commodore 128

A BASIC program that was deleted with NEW or after a reset can be restored on Commodore computers as long as no new programs are entered or loaded (or the computer is powered off). For the C64, the ...
0
votes
0answers
188 views

Identify World War 2 European theater PC wargame circa 1995

I am trying to identify a World War 2 European theater PC game, which I used to play on a Windows 95 PC, but probably predates Windows 95. The one thing that really stands out in my memory is that if ...
33
votes
1answer
8k views

Is it true that Netscape Navigator eventually became Mozilla Firefox?

Is it really the case that Mozilla Firefox is a modern day version of Netscape Navigator?
5
votes
2answers
355 views

How did Microsoft get away with JScript? [closed]

How exactly did Microsoft reverse engineer Brendan Eich's JavaScript, call it something else and not get a massive lawsuit in the aftermath? I understand this was a long time ago but I still wonder ...
10
votes
1answer
522 views

How does the 80287 process infinity values?

Modern x86 processors have an infinity control bit on the x87 FPU control register. This is bit 12 and it enables processing of infinity values in a manner that is compatible with the 80287 ...
11
votes
2answers
377 views

Best learning path for Apple IIe assembly language [closed]

I have an emulator up and running and access to the asimov ftp site, and I want to learn how to program assembly language on the Apple IIe. What assembler should I use (Merlin? LISA?) and what book or ...
5
votes
2answers
370 views

Where did the “LEVI” file selector/runner for the Apple II DOS 3.3 come from?

There's a fairly common BASIC program for DOS 3.3 on the Apple II that clears the screen, prints a catalog of the disk, and allows you to select files by letter to run or do other operations on them. ...
3
votes
1answer
117 views

How do you switch ROM banks on Gameboy MBC2 Cart with INLRetro dumper

I have an INLRetro cart dumper. The software for the device is incomplete and in beta form. I've been able to dump Tetris and it works (because it's ROM fits into bank 0). When I attempt to dump ...
7
votes
2answers
293 views

Floating control during bus sharing

I'm building a simple Z80 breadboard computer for my hobby. In this question I use Z80 as an example, but I think this may apply to many CPUs that allow for bus sharing. The problem is as follows. ...
8
votes
3answers
659 views

How can I access/use memory outside of the standard 1 MB address range of MS-DOS?

How do you access more memory (above the 1MB) in DOS if the 640KB of conventional memory are not enough? I have read a lot about this, but I couldn't figure out how to do this in actual code. Is ...
1
vote
0answers
132 views

First GPU with thermal throttling

Pretty much the title - what was the first GPU that reduced clock speeds when it started to overheat instead of simply locking up? Bonus points for first Intel and AMD CPUs too.
9
votes
2answers
139 views

What cables do I need to connect an Atari 130XE to a monitor and a television set?

I found my old atari 130XE, full of dust. I have the power supply but I don't have connection cables and controls. I've searched in eBay, Amazon and such for controls and there are plenty of them. My ...
4
votes
1answer
223 views

Hardware implementation of the isometric tile engine. Is it possible, did it exist?

We are talking about a hardware (and not software over hardware, as for example in some games on the SNES console) tile engine with multi-overlapping rectangular (rather than square, when the image ...
4
votes
1answer
230 views

What is the Nintendo 64 IPL3 and how could it be created by Rust developers?

I was delighted to learn there is an integrated toolchain for Rust development that supports the Nintendo 64. According to the documentation: For copyright purposes, the IPL3 binary is not included ...
5
votes
1answer
305 views

What's the timeline of Commodore diskette drives?

Commodore produced a number of different floppy diskette drive units, both 8" and 5.25", over the course of its history. Can someone provide a chronological list of the drives, their release dates, ...
3
votes
1answer
175 views

What was the history of Nanodata Corporation?

Nanodata was a Buffalo, New York company that was formed in 1971 and seems to have sold its first products in 1973. They filed for bankruptcy in 1982, though they may have carried on business for a ...

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