Articles by Sub-Etha Software

In a Discord discussion with Wayne Campbell, the topic of software registrations came up. Did you ever register any CoCo stuff? Here is the one we sent out with our stuff… /) Sub-Etha Software Registration/Information Sheet ( Information aquired from this questionaire will be used for product registration, free …

I did a thing. I wrote a BASIC program which will create 68 files named “0.TXT” to “67.TXT”. Each file is 2304 bytes so it takes up a full granule. (That is not really important. It just helps makes things obvious if you look at the disk with a hex …

The Micro Works Digisector DS-69 / DS-68B digitizers were really cool tech in the 1980s. Looking back, I got to play with video digitizers, the Super Voice speech synthesizer that could “sing”, and even the E.A.R.S. “electronic audio recognition system” for voice commands. All of this on my Radio Shack …

See Also: Prologue and part 1. Rules to the Challenge Vintage Computing Christmas Challenge 2025 – Logiker The Pattern Observations Since this is a symmetrical pattern, if we can figure out how to draw one quadrant, we can draw …

See also: part 1, part 2 and part 3. A correction, and discovering the order RS-DOS writes things… A correction from part 2… This example program had “BIN” and “ASC” mixed up. 0 should represent BINary files, and 255 for ASCii files. I fixed it in line 920. (I will …

The 2025 edition of the Logiker programming challenge has been announced via a YouTube video: [embed]https://youtube.com/watch?v=OBVdrbAlULw&feature=oembed[/embed] This year’s pattern is a snowflake, and I am very curious to see the approaches people come up with in BASIC to do this. I have some ideas, but none …

Obviously, things done “today” can be quite different than how things were done 30 years ago, especially in regards to computers. Is it strange that out of all the places I’ve worked where I wrote code that only one of them had an actual “coding standard” we had to follow? …

Step 1: Rename the .PIX file so it has the extension .data. This is needed for GIMP to recognize it as a “raw” data file. Step 2: Open this image in GIMP by expanding “Select File Type” and choosing Raw image data. That should allow the .data file to show …

To this date I still think one of the most useful products Sub-Etha Software ever created was MultiBoot. For CoCo hard drive users of the era, most of us had to boot from a floppy disk. That boot disk would contain the necessary drivers to access the hard drive. With …

OS9Term was an RS-DOS terminal program written by Sub-Etha co-founder Terry S. Todd. It emulated the OS-9 text screen control codes. This not only included things like color, move cursor position, and underline, but also the overlay windows! OS-9 Level 2 “windows” …