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143 questions with no upvoted or accepted answers
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16
votes
0answers
664 views

Oxford C compiler for Commodore 64

I kept one floppy from my Commodore 128 (which I used mostly in C64 mode), which is written Oxford C compiler. It is a 5.25" floppy. Don't ask me why I kept just this one; probably because I ...
13
votes
0answers
471 views

Who owns the intellectual property of Thinking Machines today?

Who owns the intellectual property regarding the Connection Machine and other products from Thinking Machines? I believe the remnants were bought by Sun, so possibly Oracle, but does anyone know?
13
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0answers
408 views

Is there a simple BASIC program that demonstrates SID6581 distortion?

Many songs use a SID6581 design "flaw", distortion, as an effect. I tried experimenting with the filter and resonance registers, but was unable to reproduce the sound. What conditions are necessary ...
12
votes
0answers
492 views

Why did some MOS 6502 packages have holes in them?

Someone was recently selling an early MOS 6502 CPU on Ebay (date code 0277) in a ceramic package that had a couple of holes in it. You can see them clearly (under the tape, which presumably was not ...
12
votes
0answers
270 views

Unix on the H11?

I'm curious if anyone is aware of actual uses of Unix on the Heathkit H11? I don't see any technical reason a memory-expanded H11 couldn't run Unix, but can't find any examples of it doing so.
12
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0answers
813 views

In search of… SeaWar — NOT Battleship!

Hopefully, sufficient background Many years ago (40-45), I used to play "Sea War" on a good sized time-share system. It was a text/adventure war game between a couple remote players, played over a ...
11
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0answers
306 views

Why would installing Windows 9x on a Sager NP8200 or Wedge 466/DX2 laptop brick the system?

In the setup.txt file on the Windows 95 and 98 CDs (located in the \WIN95 [Windows 95] / \win98 [Windows 98] folder), which contains important information on setting up Windows and solving or working ...
10
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0answers
249 views

How much did Atari pay for GEM?

Atari licensed Digital Research's GEM graphic user interface for the ST. As https://www.filfre.net/2015/04/the-68000-wars-part-2-jack-is-back/ puts it: And of course in the wake of the Macintosh the ...
10
votes
0answers
468 views

What is the origin of this version of the “Moon Landing” game?

Among the BESM-6 games there was a "Moon Landing" game; the only one available in both English and Russian versions. The binary survived but it is not runnable (yet). The description said that its ...
10
votes
0answers
697 views

Did Hewlett Packard really allow the use of the HP48 ROMs in emulators?

On the FAQ of the emu48 software, a famous emulator for HP38/39/40/48/49 calculators (http://hp.giesselink.com/emu48faq.htm#ROM), we can find the following assertion: In general all HP-ROM files ...
9
votes
0answers
144 views

When was the term Multics (operating system) coined and by whom?

From the history of Multics, I found that Project MAC was established on July 1, 1963 by MIT for the development of the Multics operating system and later GE (General Electric) and AT&T's Bell ...
9
votes
1answer
464 views

How do I clean/refurbish an Apple IIc Keyboard?

My Apple IIc is what appears to be the first US model: A2S4000 with version 255 ROMs. The keyboard PCB is marked 820 0108 03 ©1983, and the keyswitches are the "cross" type as seen below, without any ...
9
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0answers
378 views

What is the timeline of NASA ground control computers?

In the movie "Hidden Figures", NASA receives an IBM 7090 in 1961. What is the subsequent timeline of the primary computing means for flight planning and orbit calculation? Specifically, what was the ...
9
votes
0answers
480 views

How many Amiga 3000's were produced?

While revisiting this question: Seeking details relating to Amiga 3000 serial numbers I began to wonder how many actual Amiga 3000's were produced by Commodore. I suspect (like most production ...
8
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0answers
159 views

BASIC on the Nova?

The first widely documented BASIC on the Data General Nova platform appears to be Data General Extended BASIC. I can date it to at least 1978 due to copyrights in the manual, but I suspect it was ...
8
votes
0answers
212 views

Behavior of lesser known illegal M6800 opcodes

The M6800 had a few illegal opcodes, including the (in)famous HCF (Halt and Catch Fire). The following illegal opcodes were revealed in BYTE Magazine, December 1977: $14: NBA $87: STAA immediate $C7: ...
8
votes
0answers
148 views

What proprietary AT&T code/features were removed in BSD Net1 (/2), and BSD 4.4 Lite (/2) from the original 4.3BSD codebase?

Background Although BSD and its source code was freely available under the original BSD licenses, but it only covered the portion of the code which copyright was owned by Regents of the University of ...
8
votes
0answers
149 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 ...
8
votes
0answers
185 views

Gamepad triggers main menu in Fuse SDL

I'm trying to set up a gamepad to work with Fuse on Ubuntu. No matter which type of joystick I try to emulate (including None), pressing button #2 (or B in the Sega naming) opens the main SDL menu. ...
8
votes
0answers
415 views

How can I open an IBM G50 CRT monitor?

First off, I know CRTs are dangerous and I have opened and discharged multiple CRT displays before. I've got an G50 monitor that shows a picture for a second or two and then goes blank. If you power ...
7
votes
0answers
135 views

Need help checking an ADC0808 / ADC0809 chip in a arcade shooting game

Main Question: How can I check a ADC0808 chip to determine if it needs to be replaced or if my issue is something else? Any advice you can offer is SO appreciated! ADDITIONAL INFO When the arcade is ...
7
votes
0answers
746 views

Why is the original Altair BASIC (for the 8080 CPU) source code not available on-line?

As described by The Register in 2001, around 1987 journalists and others started asking Bill Gates for a copy of the source code for the original version of Altair (eventually Micro-Soft) BASIC, ...
7
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0answers
296 views

What are all the patches that SetPatch applies to Kickstart?

SetPatch runs as the first command in the Startup-Sequence when Amiga boots up. It applies patches to the code in ROM to fix bugs and also enable features if necessary. For example, I seem to remember ...
7
votes
0answers
227 views

When did Multics begin using '>' as a pathname separator?

As described in this question, Multics used > as the separator between components in pathnames, and < as a parent directory indicator in relative paths. However, an early paper describing the ...
6
votes
0answers
68 views

Automatic booting of SunOS 4.1.14 in qemu-system-sparc: OpenFirmware vs OpenBIOS

In a fit of nostalgia I decided to boot SunOS 4.1.4 up under emulation using qemu-system-sparc. It all seems to work, but I'm trying to remove an annoying manual step. I'm starting qemu-system-sparc ...
6
votes
0answers
146 views

How did the Tandy 1000 select its drives?

I am trying to use some Tandy 1000 drives with a SuperCard Pro and have encountered some anomalies using them as "standard" floppy drives. It appears that with the original (or at least, working and ...
6
votes
0answers
117 views

Restoring a self-inking printer cartridge

I've seen people ask about restoring printer or typewriter ribbons, but my situation's a little different. I have a self-inking ribbon for a DECwriter Correspondent. It's easy to open up the casing, ...
6
votes
0answers
259 views

Did any mechanical computers or calculators handle divide by zero with an exception, or did they all loop?

I just saw this video of a mechanical calculator dividing by zero. Did any mechanical calculators or computers ever provide for a failure mode on divide by zero? Or did they always handle it by ...
6
votes
0answers
468 views

90s game about a man with a revolver fighting demons

The game I'm trying to identify is a side-scrolling platformer where the protagonist is a man wielding a six-shooter revolver. I think I played a demo or shareware version as it only contained one ...
6
votes
0answers
201 views

What is the model of the Emachines Etower 366i2's Monitor?

I've an old 1999 Emachines Etower I want to restore. I have all the original parts except for the monitor. It just isn't a complete set without it. Does anybody know the specific model of that monitor....
5
votes
0answers
173 views

What was the specific function of the relay which captured Grace Hopper's famous “bug”?

Computer pioneer Grace Hopper often recounted the story of her team finding the first physical computer bug: While she was working on a Mark II Computer at Harvard University in 1947, her associates ...
5
votes
0answers
226 views

Were punch-card data-processing systems susceptible to “Bobby Tables”

At least in the U.S., during the 1970s and 1980s (and likely before), many tollways and other ticket-based systems used to use publicly distributed and collected "IBM-style" punched cards ...
5
votes
0answers
237 views

What are the needed jumper settings for a 68060 accelerator for an Amiga 3000T?

I'm trying to install a 68060 accelerator on an Amiga 3000T, but I cannot figure out the correct jumper settings. The information I've found online is: J100 CLK90 Delay jumper. This Jumper has three ...
5
votes
0answers
178 views

PET LOAD command and the < key

I remember reading (probably in some issue of the newsletter of the PET Benelux Exchange (PBE)) about a strange effect during tape loading of a PET program. Back in the day, I tried it and it worked. ...
5
votes
0answers
93 views

IBM terminal schematics

I'm searching for the electronics schematics for IBM terminals 3477 and 3486. I've already googled for it without success. I've to mend this hw and the power side seems ok but doesn't function, so I ...
5
votes
0answers
158 views

Looking for educational AI game for classic macos

I'm looking to find the name of a (purportedly) educational mac game I purchased from a bookfair handout around 1990-91. The concept was that you would make up the rules to your own board game on a ...
5
votes
0answers
284 views

Link N64 object file while preserving relocation data

The N64 SDK provides the makerom tool to create a ROM image given a file describing the ROM layout called spec and the various object files it refers to such as the N64 OS, RCP microcode, and the game'...
5
votes
0answers
281 views

TI-89 BASIC Compiler

Is there any way to compile programs written in TI-BASIC (68k) into 68k assembly? The apps I have seen only support only the TI-83 family and do not produce 68k assembly.
5
votes
0answers
246 views

Manual for DIAGNOSTICS II V1.2 - CPU TEST SUPERSOFT ASSOCIATES

I am building a 8080 emulator. I found some useful test suites here. The emulator passes the first test suite (8080/8085 CPU Diagnostic, version 1.0, by Microcosm Associates), but not the second ( ...
5
votes
0answers
286 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 ...
5
votes
0answers
319 views

R.O.B can't move up or down

I got this R.O.B (Robotic Operating Buddy for the NES), first time I turned him on his arms wouldn't close, so I took him apart and cleaned him. I put the gears back into place. After turning him on ...
4
votes
0answers
216 views

SSH for DOS / Win 3.1

Is there an SSH client for DOS 6.22 or Windows 3.1 that supports certificates and could be used to connect to AWS or Azure instances, or any other server for that matter? I have another laptop ...
4
votes
0answers
88 views

Why did the Burroughs 205 not use bi-quinary like the IBM 650?

The IBM 650, one of the first general-purpose digital computers, designed in the early fifties, used decimal digits with bi-quinary representation for reasons discussed here: Why did the IBM 650 use ...
4
votes
0answers
170 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 ...
4
votes
0answers
290 views

What is it with DS emulation being so slow?

I have a fairly decent computer, and I have been messing around with DS Emulation recently. I have found that if a game is running on the emulator, and if I have anything else running, the performance ...
4
votes
0answers
124 views

Where to find ancient wavy cursor program 'cyclops'?

In the period of about 1987-1988 I downloaded a small compiled program from a BBS in the 512 area. I don't know anything about the author but the file was named 'cyclops.' I can't be sure if it had a ....
4
votes
0answers
160 views

How can I connect a PIA or VIA chip to the Apple IIc?

I have an early Apple IIc, model A2S4000 with the 342-0272 motherboard and ROM 255. (I am considering upgrading the ROM, perhaps with a switch that would let me switch between different ROM versions.) ...
4
votes
0answers
187 views

Teddy Ruxpin Animation Coding “Language”?

I've recently become interested in the original Teddy Ruxpin that operated by playing 8-track cassette tapes. The 8 channels on the tape were used in a creative way to ensure that Teddy's animation ...
4
votes
0answers
125 views

Annotated die photo of 3D graphics chip

I'm interested in how graphics hardware has worked at different tech levels. Having looked at an annotated die photo of the VIC-II for example, I now feel I have a much better understanding of how it ...
4
votes
0answers
106 views

Did Hayes and/or other modem companies ever add TDD capability to their modems?

A Telecommunication Devices for the Deaf (TDD, aka Text Telephony (TTY)) was an early modem capability to allow deaf people to use telephones by including a keyboard and output device (such as ...

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