|My Custom 8 Bit CPU
based on mostly discrete logic
||Inspired by the efforts of Ben Eater and James Bates
I decided to build a custom 8 Bit CPU. But instead of a breadboard
design I leveraged my PCB design tools to implement something that
may be manufactured in quantity.
Obsolescence Guaranteed PIDP-8/I
||A short run PDP8 replica kit affords an
opportunity to revisit cutting-edge computer technology
around the time of the moon landings. No, I didn't acquire an
ASR-33 teletype to go along with it, but I can still hear it
as I type commands in the OS/8 shell.
|Bootstrapping STM32 F3
Discovery Board with Nuttx RTOS
||As part of my STM32 development I decided to
bootstrap the Nuttx RTOS on my STM32 F3 Discovery Board. This
article describes the configuration and build process
required to produce an executable image that can be burned to
the STM32 F3's onboard flash.
with Segger J-Link, OpenOCD, and Linux
||Faced with a need to develop a custom
hardware project based on the STM32 series of
microcontrollers I assembled the hardware and software
required to debug my application from a Linux host. This
article describes my selections and a couple issues I
Solder Reflow Oven Project
||In late 2015 I needed to reflow some boards
and yet didn't want to spend thousands for a commercial
reflow oven so I bought a common convection oven, stripped it
down, and installed my own heating elements, controller and
custom front panel.
Install on Debian 8 with Nginx and PHP5-FPM
||I recently needed to build a website and
ultimately wound up using a relatively new CMS called October
on top of Debian 8, Nginx, and PHP5-FPM. While I've
documented my installation experience here I recommend
reading the notes at the end of the article before committing
to the installation. October isn't for everyone.
Install on FreeBSD 10 with Nginx Proxy
||I had a need for some inventory control
software so I decided to install Odoo (formerly OpenERP) on
an Intel NUC I was using primarily as an internal Git
repository. As this system was running FreeBSD and Odoo
doesn't officially support BSD I had to do a bit of
integration work that is documented here.
|Building ARMV6 Ports on
FreeBSD with Poudriere
||I recently began to experiment with some ARM
processors and FreeBSD only to find that pre-built packages
are not provided for the ARM architecture. So I did things
the BSD way and built what I needed from source using the
||I've used Git strictly as version control
for years but I recently decided to use it to deploy software
on my website as well. This article describes how I set this
||This article describes how I designed a
custom chassis and linear power supply as required to house
the custom Amp Camp Amp PCB I designed.
PCB with Diptrace
||I needed to build a revised version of the
Amp Camp Amp circuit designed by Nelson Pass so I decided to
kill two birds with one stone and use the opportunity to
evaluate Diptrace, a Schematic Capture and PCB layout
program. This article describes my first experiences with the
application and shows the end result of the work.
||An aircraft tracking experiment made
possible by the Amateur Radio Automatic Position Reporting
System (APRS) Network.