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11
votes
0answers
258 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 thought I ...
11
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0answers
415 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?
11
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0answers
771 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 ...
10
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0answers
358 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 ...
9
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0answers
393 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 ...
8
votes
0answers
343 views

Can anyone identify this Parallel to Serial Interface Board?

I just spent an enjoyable day at the local ham fest with my father - digging through boxes of other peoples junk. I'm a sucker for weird electronics, especially when it's in the free pile, and so I ...
8
votes
0answers
349 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 ...
8
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0answers
358 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
374 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 ...
8
votes
0answers
370 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 (...
8
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0answers
355 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
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0answers
87 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.
7
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142 views

Did any scanners marketed as general purpose implement SCSI device type 06h (SGC)?

SCSI-connected (flatbed) scanners existed a lot in the 90s and early 2000. Usually, they did need a vendor or vendor-specific (TWAIN, sane...) device driver to work, and IIRC usually implemented the ...
7
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0answers
139 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. ...
6
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0answers
101 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
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0answers
193 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....
6
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0answers
252 views

Where can I find “Nemesis II”, the sequel to “Nemesis”, an old CP/M game?

In 1981, the "Nemesis" game was released for CP/M-based machines by Super Soft Inc., with the author attribution of Michael A. Pagels and Michael Q Hiller, and artist attribution of Diana J. Bush. ...
5
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0answers
79 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
1answer
174 views

Is it safe for C64 cartridges to respond to read and/or write requests on “unmapped” addresses?

According to the C64 wiki, asserting G̅A̅M̅E̅ on the cartridge port (and not asserting E̅X̅R̅O̅M̅) of the C64 leaves three blocks of the C64 address space "unmapped": 28 KB @ $1000 (otherwise RAM), 8 ...
5
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0answers
185 views

Origin of VIC-II (PAL) chip labelled 8656R2?

Wondering why a C64 VIC chip (fully functional) that I got off eBay had an 8565R2 label fitted on top of it: I peeled it off to find this: I haven't ever heard of a VIC-II (PAL) labelled MOS 8656R2. ...
5
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0answers
241 views

Does the Commodore 64 power switch have a history of failing?

My original (1983?) Commodore 64 (brown breadbox with grey function keys) has trouble powering on. Specifically, when I flip the power switch the power LED will glow dimly and the machine fails to ...
5
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0answers
148 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 ...
5
votes
0answers
256 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
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0answers
180 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
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0answers
271 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
260 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
147 views

Modern Alternative to Malvino's Digital Computer Electronics

For those who want to study retro computing in depth, starting by understanding 74xxx logic and CPU design is (IMHO), one of the best paths there is. Malvino's "Digital Computer Electronics" (DCE), ...
4
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0answers
222 views

First use of “destructuring” in computing?

Which programming system first introduced "destructuring" denoting accessing various parts of an object using some sort of pattern, and binding those parts to variables, like Common Lisp's ...
4
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0answers
265 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, ...
4
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0answers
222 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 ...
4
votes
0answers
335 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 ...
4
votes
0answers
147 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 ...
4
votes
0answers
81 views

Backlight inverter failure on TI Travelmate

I picked up a TI Travelmate 4000E for free and it worked perfectly using my AC adapter(genuine TI one from another 4000E). The backlight fires up full brightness for about a second, then dies. ...
4
votes
0answers
121 views

Vic-20 total game cartridge sales

The Vic-20, like many home computers of its time, had a cartridge slot that could be used both as a general expansion slot, and for game cartridges like a console. Game cartridges on the Commodore ...
4
votes
0answers
143 views

What would happen if the DHR jumper was enabled on a Rev A Apple //e?

The Apple //e originally did not support Double HiRes graphics (DHR). The engineers realized they could double their hires and lores X resolution shortly after the introduction of the machine, so the ...
4
votes
0answers
256 views

How many transistors in the Nintendo Super FX chip?

The Super FX coprocessor, released with Star Fox in 1993, provided 3D rendering capabilities that were absent from the SNES itself. Given that 3D gaming was quite widespread by the late eighties, it ...
4
votes
0answers
165 views

How to use IIgs enhanced graphics modes in AppleSoft BASIC with System 6?

There are many packages that let you use the enhanced graphics modes of the IIgs in AppleSoft BASIC. However most packages like Iconix do not like System 6 so they have to run off disks and not the ...
4
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0answers
250 views

Cost of Apple II switching power supply

Apple went to the trouble of designing a switching power supply at a time when they were still quite new and not widely used for consumer electronics, perhaps because Steve Jobs liked the aesthetics ...
4
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0answers
144 views

DTSS software list?

I'm continuing my effort to track down the original author of the early game Chase. I have pretty much concluded it was written on the GE-635 running Dartmouth Time Sharing System (DTSS) and Dartmouth ...
4
votes
0answers
404 views

Rainbow Technologies Ltd DRM system for DOS

A number of games from the early 1990s appear to be protected with a DRM system developed by Rainbow Technologies Ltd. The system allows content in the games to be unlocked by sending the manufacturer ...
4
votes
0answers
189 views

Are there alternative BIOS ROMs for the IBM 5162?

This page references a problem with the IBM 5162 BIOS where it will present an error during POST under some circumstances and that using a third-party BIOS was a workaround. What other BIOS ROMs ...
3
votes
0answers
195 views

What was this music program I played with around the late 90s?

It ran on windows 95 or 98 I believe. It allowed you to make music by placing colored blocks in various rows. I think it was associated with mtv, but I'm not sure (I had never actually heard of MTV at ...
3
votes
0answers
95 views

CF with Workbench not loading in WinUAE but works on real A1200

I have a CF HDD with installed WB3.1, which works as expected on real A1200. Yesterday I wanted to copy over the latest ACA1221 soft, took the CF out, connected to PC just as normal. The WinUAE is set ...
3
votes
0answers
197 views

What's the first use of the term, “1977 Trinity”?

The term "1977 trinity" has been used, here on Retrocomputing SE and elsewhere, to refer to a set of three computers that started shipping in mid- to late-1977: the Apple II, the TRS-80 Model I and ...
3
votes
0answers
176 views

Early 1982 PCW article about pseudo random dungeon mapping

I am looking for an article from an issue of Personal Computer World (PCW) from 19821 which related to generating mazes/dungeons using pseudo random seeds, what I think are (now) called procedural ...
3
votes
0answers
129 views

How did the template cache in CFront work?

I've seen some discussion of how templates were historically implemented in CFront around the web, including here. The link describes the Borland model, which is familiar, and the CFront model with a ...
3
votes
0answers
159 views

Identify this 1990s-era educational game featuring kohlrabi

I have fond memories of several educational computer games from school circa 1993–1998. Possibly from MECC, but I haven't found this game on any lists of MECC games as far as I could tell. It's a ...
3
votes
0answers
190 views

Preservation of old Computer Shopper magazines?

I am sure many of you remember the gigantic Computer Shopper magazines of the 1990's; but Computer Shopper actually dates back to sometime in 1979, and still exists in electronic form today. In my ...
3
votes
0answers
74 views

Documentation for the MIT PDP-1X OS

The PDP-1x is a Digital Equipment Corporation PDP-1 computer modified to support both ones and twos complement arithmetic, and to include a memory management unit. It ran a locally developed ...
3
votes
0answers
271 views

Who developed the Super FX co-processor?

The Super FX co-processor was, according to Wikipedia and every other source I can find, a custom designed RISC chip made by Argonaut Games. Argonaut was a small British company and back in the late ...

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