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Total: 11 results found.

... in the next article. The GPS configuration is handled by an AVR ATTiny2313A with the code written in C using AVRStudio with the compiled code using 508 bytes (28%) of the available flash memory. The ...
... be plentiful in the US they are a fairly uncommon machine in New Zealand. Luckily just across the Tasman Sea is Ian Mavric's TRS-80 OldTimer Center.  Ian is a big supporter of the TRS-80 ...
... requiring the "rare as hen's teeth" U72 PAL chip. I was surprised when Ian Mavric sent me the definition file to program a Lattice 16V8 GAL for use as U72. The upgrade just had to be ...
... configuration and inspired by Ian Mavric's "Building the Super Micro" article I replaced the floppy drives with two internal 3.5" 720kb units in the bottom bay which makes software transfer from a PC a ...
5. TRS80 Model 4 Fault
(JAQ/BLOG)
The TRS80 Model 4 had been languishing in the workshop for a few years and was finally due some attention. Inspired by Ian Mavric's "Building the Super Micro" article I did a complete disassembly, ...
... I could graph daily usage over time and see when things had gone awry. The network connection in the original design was performed using an AVR AT90S8515 and a Packet Wacker ethernet interface.  ...
...  and version 1.9 AVR TNC firmware. The firmware is a slightly modified version of N2RVQ's version 1.8 firmware which we call version 1.9.   The difference is a startup delay to prevent ...
... I could graph daily usage over time and see when things had gone awry. The network connection in the original design was performed using an AVR AT90S8515 and a Packet Wacker ethernet interface.  ...
... I wanted to keep the rig a bit more original and was planning to build my own frequency counter using an AVR (or similar) microcontroller and use the existing 7 segment displays (or replacements if they ...
... on an AVR and use the existing 7 segment displays but some research showed that a fault with the custom MSM9520RS is fairly common... the part is near impossible to obtain..... and that Teruhiko Hayashi ...
... or "not running".  This signal is used by an AVR/Packet Wacker based board which collects data and makes it available for loading into a MYSQL database for later trend analysis. The code for ...

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Contact Andrew Quinn

jaquinn@ihug.co.nz http://twitter.com/jaquinn