Sub-Etha Software
Blogs

Reversing bits in C

December 2, 2022 Sub-Etha Software

In my day job, we have a device that needs data sent to it with the bits reversed. For example, if we were sending an 8-bit value of 128, that bit pattern is 10000000. The device expects the high bit first so we’d send it 00000001. In one system, we …

Sub-Etha Software
Blogs

ChatGPT AI can analyze 6809 assembly language!

December 2, 2022 Sub-Etha Software

I gave it this: clear lda #96 clearA ldx #1024 loop sta ,x+ cmpx #1536 bne loop rts …and ChatGPT gave me this: The clear subroutine in this code is used to clear the screen and initialize it with a grid of green squares. The subroutine begins by loading …

Blogs

Insat360 X3 now allows changing WiFi password

November 22, 2022 Sub-Etha Software

The Insta360 app has an option to change the password on the X3 camera. This may also work on other cameras, but I have not tested it. I have done a password change, but have not verified this actually did anything. This option will cause the camera to display …

Sub-Etha Software
Blogs

Arduino, ZigBee and motion sensor help needed.

October 25, 2022 Sub-Etha Software

For a future project, I need to make use of remote triggers. These could be motion sensors, beam sensors, pressure mats, etc. The ZigBee standard seems to be the way to go since I can find cheap consumer motion sensors that run on batteries. There also seems to be ZigBee …

Blogs

Carl England must be stopped.

September 29, 2022 Sub-Etha Software

Earlier this month, I received a message on my Sub-Etha Software Facebook page from author (and former/current CoCo programmer) Carl England: I knew CHR$(13) was a carriage return, so this was creating a file name that contained carraige returns. What would that do? I typed it in to find …

Blogs

Exploring 1984 OS-9 on a 64K TRS-80 Color Computer – part 1

September 26, 2022 Sub-Etha Software

See also: part 1, part 2 and part 3. NOTE: The images in this article were taken from the excellent Radio Shack Catalogs archive website: https://www.radioshackcatalogs.com/ 1984 was a big year for home computers. Not only was the Apple Macintosh released with that famous 1984 Superbowl ad, but Microware’s …