35 votes
Accepted

Where was the DOS cdd utility from?

I remember CDD as a 4DOS command, which would have been available in the Norton Utilities as NDOS. JP Software’s other shells also implement CDD, so 4OS2 and 4NT users would probably recognise it too. ...
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13 votes

Unix utility "smiley" to decode emoticons: Where to get it?

The smiley program was posted to the comp.sources.misc Usenet newsgroup multiple times. Here is the description from the Volume 20, Issue 73 posting: Submitted-by: DaviD W. Sanderson Posting-...
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13 votes

What was the first two-panel file manager for DOS?

I think that both PathMinder and Bourbaki’s 1dir predate your examples, but I don’t know if they are the first DOS-specific dual-pane file managers. PathMinder was first published in 1984, 1dir (...
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10 votes
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What is the history of data compression tools on personal computers?

The story is told in this 1988 usenet post by Paul Homchick: Some time went by and it was a CP/M world, and diskettes were bigger. In 1981 Richard Greenlaw released SQ and USQ, based on Huffman ...
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5 votes
Accepted

Is there a KiCad library with parts used in retrocomputers?

People do use KiCad for this job! The S100 Computers group have created many, many boards using KiCad (included in the list here) and provide the KiCad files used to create each of them. Including the ...
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  • 16.9k
5 votes

Looking for a 90s Macintosh background pattern collection

I don't remember if it contains those specific backgrounds, but one pack that otherwise matches your description is included among the freeware bundled with the Demo releases of Executor from before ...
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5 votes
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Unix utility "smiley" to decode emoticons: Where to get it?

If you want to get it running on a modern Posix system, here's what you can do. Get the source from this archive. (This is a more recent version than the one cited in the other answer.) Follow the ...
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  • 3,072
5 votes

How did Atari cassette "turbo without hardware mods" work?

If one doesn't need particularly high data rates, it's possible to implement data-to-audio and audio-to-data routines in a very small amount of code. To store a "1", generate 250us of high followed ...
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  • 26.3k
4 votes
Accepted

How did Atari cassette "turbo without hardware mods" work?

Actually, in that case, no fancy algorithm changes were used - the tape recorder was literally "overclocked" - frequency of interrupts handling communication with the tape recorder changed. I found a ...
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3 votes

How did Atari cassette "turbo without hardware mods" work?

With Atari, some or combination of the following practices were used: Increasing block size from default 128 bytes to more bytes. Fewer blocks resulted in fewer overhead bytes (calibration sequence, ...
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1 vote

What was the first two-panel file manager for DOS?

The original XTree was released in early 1985 so predated Norton Commander, I believe. I'm not entirely certain that this first version had split screen (dual panel) but I know my trusty copy of XTree ...
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