@peteronion.bsky.social
Retired (early) Software Eng. G0DZB occasionally /P on HF. Discoverer of the PI 2 Xenon Death Flash. Looks after the Elliott 803 at TNMOC
Would you ever write "Downdate the counter" as a comment to a line of code that decrements a counter ?
November 10, 2025 at 4:38 PM
Would you ever write "Downdate the counter" as a comment to a line of code that decrements a counter ?
A bit of fault finding on a RC2014 system for another local builder who couldn't get it to work. It turned out to be a couple of dry joints on the SIO board. It was running BASIC by the time I was finished :-)
November 8, 2025 at 4:01 PM
A bit of fault finding on a RC2014 system for another local builder who couldn't get it to work. It turned out to be a couple of dry joints on the SIO board. It was running BASIC by the time I was finished :-)
I've had a fun evening debugging (someone else's) software with LEDs on output ports :-) All working now though :-)
November 7, 2025 at 11:01 PM
I've had a fun evening debugging (someone else's) software with LEDs on output ports :-) All working now though :-)
Now I have to learn Forth :-)
November 6, 2025 at 6:35 PM
Now I have to learn Forth :-)
I've modified my Orton 3C to move the ROM up to 8000h thus allowing all 32Kbytes of the RAM to be accessed.
November 5, 2025 at 4:43 PM
I've modified my Orton 3C to move the ROM up to 8000h thus allowing all 32Kbytes of the RAM to be accessed.
More Z80 fun today ! youtu.be/twMihAydZYE
Using qterm on my CP/M machine with my Orton 3CX
YouTube video by PeterOGB
youtu.be
November 4, 2025 at 7:55 PM
More Z80 fun today ! youtu.be/twMihAydZYE
I've been working on this "Prime Factors" programme at home on my 803 emulator, and today I got to run it on the real machine @TNMOC www.peteronion.org.uk/video/PrimeF...
www.peteronion.org.uk
November 2, 2025 at 1:46 PM
I've been working on this "Prime Factors" programme at home on my 803 emulator, and today I got to run it on the real machine @TNMOC www.peteronion.org.uk/video/PrimeF...
I've been helping a RM380Z owner to try and get the RM CP/M Algol-60 compiler/runtime working. And we've done it! Seems it only likes to run from drives A: to D: as that's all the 380Z supported.
October 31, 2025 at 8:23 PM
I've been helping a RM380Z owner to try and get the RM CP/M Algol-60 compiler/runtime working. And we've done it! Seems it only likes to run from drives A: to D: as that's all the 380Z supported.
It's been a while since I've written a makefile :-)
October 30, 2025 at 9:31 PM
It's been a while since I've written a makefile :-)
A mechanical Fourier Analysis machine ! www.youtube.com/watch?v=NAsM...
(1/4) Intro/History: Introducing a 100-year-old mechanical computer
YouTube video by engineerguy
www.youtube.com
October 30, 2025 at 10:19 AM
A mechanical Fourier Analysis machine ! www.youtube.com/watch?v=NAsM...
I though I would check if my Elliott 803 "prime factors" programme is working correctly. It is
October 29, 2025 at 10:54 PM
I though I would check if my Elliott 803 "prime factors" programme is working correctly. It is
Some reverse engineering at TNMOC today !
October 28, 2025 at 3:54 PM
Some reverse engineering at TNMOC today !
My current Orton 3CX setup :-) I've added an inline switch to the 5V supply so I don't have to keep unplugging it every time I want to update the Flash ROM.
October 24, 2025 at 11:42 AM
My current Orton 3CX setup :-) I've added an inline switch to the 5V supply so I don't have to keep unplugging it every time I want to update the Flash ROM.
URGH! Metoffice new beta forecast page is a step backwards. Much more clicking and scrolling required :-(
October 24, 2025 at 7:31 AM
URGH! Metoffice new beta forecast page is a step backwards. Much more clicking and scrolling required :-(
"We estimate you package will be delivered between 11:01 and 13:01 today". A two hour long window with start and end specified to the minute ? 🤦♂️
October 23, 2025 at 9:08 AM
"We estimate you package will be delivered between 11:01 and 13:01 today". A two hour long window with start and end specified to the minute ? 🤦♂️
Cheating a bit today... Running ZSID (Z80 version of Digital Research's debugger) under zxcc (CP/M emulator) to debug a bit of Z80 code that wasn't working on my Orton 3C. #RC2014
October 18, 2025 at 12:20 PM
Cheating a bit today... Running ZSID (Z80 version of Digital Research's debugger) under zxcc (CP/M emulator) to debug a bit of Z80 code that wasn't working on my Orton 3C. #RC2014
I wonder what I could do with that RML 380Z keyboard that has been sitting on a shelf for many years 🤔 Seems a pretty straight forward interface (8 data + strobe).
October 16, 2025 at 9:46 AM
I wonder what I could do with that RML 380Z keyboard that has been sitting on a shelf for many years 🤔 Seems a pretty straight forward interface (8 data + strobe).
I went to bed with an annoying un-fixed bug in a very small bit of Z80 code. 😞 I Woke up at 3:30am with the bug fixed 😀
October 15, 2025 at 8:09 AM
I went to bed with an annoying un-fixed bug in a very small bit of Z80 code. 😞 I Woke up at 3:30am with the bug fixed 😀
I've written a small GTK+ application on my PI for capturing the SRecords send on my Orton 3C's bit-banged serial port. It can also send them back while waiting for an "OK" from the 3C after each SRecord. Next step is to handle "SC" which is sent back if the Sum Check byte is incorrect. #RC2014
October 8, 2025 at 6:26 PM
I've written a small GTK+ application on my PI for capturing the SRecords send on my Orton 3C's bit-banged serial port. It can also send them back while waiting for an "OK" from the 3C after each SRecord. Next step is to handle "SC" which is sent back if the Sum Check byte is incorrect. #RC2014
My #RC2104 Orton 3C has produced its first Motorola SRecord :-) Next to dump a block of RAM, then to write a parser so it can receive SRecords and load the data into RAM .
October 6, 2025 at 9:49 AM
My #RC2104 Orton 3C has produced its first Motorola SRecord :-) Next to dump a block of RAM, then to write a parser so it can receive SRecords and load the data into RAM .
