Unanswered Questions

201 questions with no upvoted or accepted answers
20 votes
0 answers
328 views

Where is Mike Lesk's (circa 1973) "portable I/O package" for C?

According to Dennis Ritchie's 1993 paper The Development of the C Language: Also during this period, the compiler was retargeted to other nearby machines, particularly the Honeywell 635 and IBM 360/...
19 votes
0 answers
1k views

Oxford C compiler for Commodore 64

I kept one floppy from my Commodore 128 (which I used mostly in C64 mode), labelled ‘Oxford C compiler’. It is a 5.25″ floppy. Don't ask me why I kept just this one; probably because I thought I ...
17 votes
1 answer
518 views

When was an image of an apple first used to promote the APL language

The APL community is contemplating the adoption of a common logo but some are worried about trouble from Apple lawyers. Now, IBM and others have been using apple motifs in promoting APL for a long ...
16 votes
1 answer
455 views

Why did the 8080's PUSH PSW write one reserved bit as 1 and the other two as 0?

The x86 "flags" register, which holds condition codes and other processor status bits, has several reserved bits with fixed values, but these fixed values are not all the same. In ...
15 votes
0 answers
372 views

Uninstalling OS/400 by deleting one program

This is about the AS/400 which is an IBM mini-computer launched in 1988. It lives on today after several name changes and considerable hardware and software changes. It is still often informally ...
13 votes
0 answers
194 views

68060 CLKEN and CLK pins

Using an 68060 to 68040 Amiga adapter on another brand. The adapter ties the 68040 BCLK to the 68060 CLKEN. The CLK pin on the adapter is left floating. To run the CPU with 1/2 bus will I need to ...
13 votes
0 answers
369 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.
13 votes
0 answers
532 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 votes
0 answers
466 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 ...
13 votes
0 answers
875 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 ...
13 votes
1 answer
497 views

What are these compression types in the ARC file format?

The file format of the SEA ARC compression tool, also used by the PKWare PKARC tool, allowed the following compression types: Packing (RLE encoding) Squeezing (static Huffman coding) Crunching (LZW)...
12 votes
0 answers
246 views

Was there a hard disk type that had a SMART overflow crash/bug?

A data center employee told me a story about 25 years ago, explaining why that data center took some time to assemble a RAID array. Recently, I wasn't able to verify the facts by googling, and I may ...
12 votes
1 answer
550 views

Was there a cartoon series in the UK computer press called "Computability Brown"?

My dad was a computing professional in Scotland in the 1970s. He received a couple of industry trade magazines every week, such as Computer Weekly and Computing. In one of them, I remember there being ...
11 votes
0 answers
350 views

Was the RPL language for the Commodore PET ever used other than by its author?

Note that this question is about the programming language RPL for the Commodore PET, not the HP language with the same name. RPL was developed by Tim Stryker and sold through his company Samurai ...
11 votes
1 answer
706 views

1990s BBS game featuring mining elements from a planet

Sometime in the 90s (sorry, can't be more specific) I used to dial in to a BBS and play a multi-player game that involved manually mining elements from a planet. It was very detailed, you got employed ...

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