All Questions

14
votes
0answers
254 views

Does anyone know the specific differences between the NES-001 (NTSC) motherboard revisions?

On each Motherboard of an NES-001 (NTSC) there is a code: NES-CPU-xx These range from 04 to 11 (I think) I would like to know if these are all of the revisions of the NES and what major differences ...
12
votes
0answers
361 views

Who or what is the 'AH' credited on the die of the Atari TIA chip next to Jay Miner?

I noticed that on the die shot of the Atari TIA chip, at the top you can see an Atari logo and at the bottom there are two initials: JM + AH. I assume that JM means Jay Miner, but who is the AH? I ...
10
votes
0answers
229 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?
10
votes
0answers
312 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 ...
10
votes
0answers
684 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 ...
9
votes
0answers
319 views

When did README files start showing up in software?

Everyone knows how important documentation is -- for a project to grow past a certain point, it's a must-have. However, almost every software project of any size nowadays comes with at least a README ...
8
votes
0answers
469 views

Looking for a specific BASIC music program from the 80s

When I was a kid, we had a PC-XT with a lot of GW-Basic programs on it. I am trying to track down one in particular -- it was a music player of sorts. A menu (all monochrome text as I recall) and you ...
8
votes
0answers
118 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
480 views

What are the technical differences between the Midway 8080 and Taito 8080 hardware boards?

In my research on 1970s-era arcade machines, I've noticed that both Midway and Taito created games which used Intel's 8080 microprocessor. However, each company had their own host boards which ...
7
votes
0answers
222 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 ...
7
votes
0answers
123 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 ...
6
votes
0answers
171 views

Is there a non-paging ITS for the PDP-6 or PDP-10?

In the late 60s, the Incompatible Timesharing System ran on a PDP-6 without any paging hardware (i.e. an MMU in modern terminology). See the Jargon entry for BLT, for example, which states (my ...
6
votes
0answers
125 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 ( ...
6
votes
0answers
272 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 (...
6
votes
0answers
184 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
votes
0answers
66 views

PLATO & JS99'er

Has anyone out there managed to load a PLATO PHM 3122 cartridge by Control Data into the JS99'er emulator? That way a user could place all of the PLATO Lesson Disks on a cloud location (e.g., ...
6
votes
0answers
219 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
votes
0answers
154 views

Possible cause for C128 A/V output containing faintly coloured columns and failing shortly after?

I recently acquired a Commodore 128. It worked fine for about an hour, in both C64 and C128 mode, at the exception of some coloured bars, before displaying garbage and not booting anymore into any ...
5
votes
0answers
196 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 ...
5
votes
0answers
172 views

Amiga 500+ rev8A, 1 MB chip RAM and 0.5 MB slow RAM

I have an 500+ rev8A, I added the missing 0.5 MB RAM and the U32 to the motherboard. I also have 512 KB in the trapdoor. This results in 1.5 MB chip RAM; but I want to have 1 MB chip RAM and 0.5 MB ...
5
votes
0answers
195 views

How to open a CorelDraw WI wavelet-compressed image

I have a large sample of .WI images I need to convert to e.g. JPEGs, but the format now seems defunct. The mimetype is image/wavelet. The compression algorithm was developed by Summus, a US company ...
5
votes
0answers
136 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 ...
5
votes
0answers
257 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
219 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
57 views

Why did Apple remove booting from external drives in later IIc ROM versions?

Apple II computers don't come with DOS in ROM, but rather need to boot from a floppy disk to make the disk drives usable. The IIc was the first Apple II that came with a built-in disk drive, so ...
4
votes
0answers
117 views

Is there a comparative analysis of the evolution paths of chips inheriting from TMS9918?

This is primarily about VDP from the Sega Master System game console and video chip from the MSX 2 series computers. Specifically about Yamaha YM2602 (aka Sega 315‑5124) and Yamaha V9938 respectively. ...
4
votes
0answers
196 views

Was the character in the Game & Watch series supposed to be his own unique character?

For those of you who don't know, the Game & Watch handhelds were a series of LCD handhelds released prior to the Gameboy that featured one (and sometimes two) player games. Some of these games (...
4
votes
0answers
121 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
votes
0answers
174 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'...
4
votes
0answers
193 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
votes
0answers
133 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
383 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
181 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 ...
3
votes
0answers
100 views

Symbian emulator to run Ngage games

I don't really know if this is the correct place to ask this, if not let me know where I should. I would like to know if it would be possible to run Ngage games on an existing Symbian emulator. There ...
3
votes
0answers
193 views

Can you tell me more about this robot?

A robot I can't find information on. I noticed an article and or advertisement in 1985, in the main city-wide newspaper ('mercury') in the city where this robot-factory was located. (I don't have ...
3
votes
0answers
143 views

Commodore C128 MOS 6526A interchangeability?

I have a working C128 desktop that I'm using to troubleshoot a non-working C128D-CR. I suspected a problem with CIA 2 on the C128D, so I swapped its chip labelled "6526A" with a 1988 year stamp with ...
3
votes
0answers
157 views

Where did /usr/mdec come from?

On UNIX, the boot code is traditionally found in the directory /usr/mdec. Some modern UNIX variants keep this tradition up (e.g. OpenBSD) while others have changed the directory layout (e.g. FreeBSD)....
3
votes
0answers
168 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 ...
3
votes
0answers
118 views

a learning gomoku in Lisp

Years ago I played a version of gomoku that was written in Lisp that learned as you played. After a few rounds, it became nearly unbeatable. This was on Unix System III on a small PDP-11. I have ...
3
votes
0answers
80 views

Unexpected UL error / List problems Epson HX-20

I have an Epson HX-20 which has been in storage since I last used it in 2013. To my surprise the program I wrote back then is still stored in a RAM file, and by LISTing it (and checking it against ...
3
votes
0answers
251 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.
2
votes
0answers
87 views

Which Nobel prize winners names besides Townes were used as code names for Fujitsu computers?

Fujitsu named its late 80s/90s personal computer FM Towns after physics Nobel prize winner Charles Townes. According to the sources (1, 2) I could find, using Nobel prize winners as code names was ...
2
votes
0answers
158 views

Is my Japanese Pokemon Red cart fake or damaged?

I recently got this copy of Pokemon Red (JP). After an indeterminate amount of time (anywhere from 30 seconds to 30 minutes), it will cause my GB Player to crash. I have functional copies of Yellow ...
2
votes
0answers
290 views

Potentiometer rebuild - inexpensive damping grease?

I successfully took apart an Atari 2600 paddle controller, then cleaned and appropriately lubricated the contacts. However, the volume knob does not have the same smoothness as it does on the other ...
1
vote
0answers
110 views

Old grid-based puzzle game with snakes that wake up when on the same row/column as you

I'm trying to find an old game: Played on an old computer, not sure which kind. (early/late 1990s?) Graphics were grid-based and "8-bit-seeming". Locations included - I think - plains and caves. ...
1
vote
0answers
123 views

Are Unisys ClearPath Libra mainframes still in use in Australia?

By use, I mean are they still actively being developed for. I know this is the case in New Zealand and USA. In particular, is ALGOL code still being written on them?
1
vote
0answers
187 views

How do I compile C code with the IRIX X Window System?

I have typed out a rather large file in C code that is defining OpenGL graphics and will draw a triangle on the screen. While I know all of the functions of the X Windowing System, I do not know how ...
1
vote
0answers
199 views

Which machines, other than the PC-Engine, uses custom-waveform synthesis for sound?

The most common way retro machines made sounds were with programmable sound generators (PSG); there was a bunch of square waves, saw waves or noise channels at disposal. When technology evolved ...
1
vote
0answers
401 views

What computer (possibly a PC compatible) rendered a spinning floppy disk on the screen on a boot error?

I recall seeing an IBM PC compatible or similar system many years ago in a business environment that had a distinctive boot error screen. The system showed a spinning floppy disk on the screen, ...
1
vote
0answers
177 views

How many CP/M machines ever shipped?

How many machines for which CP/M was the primary operating system (so not counting the Commodore 128) ever shipped? I would also be interested in knowing how many S-100 machines ever shipped. I get ...

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