Archive for date: July 7, 2011

A basic simulator for Caxton Foster’s “Blue” Architecture…

July 7, 2011 | Homebrew CPU | By: Mark VandeWettering

Yep, been spending some time thinking about homebrew computer architectures. I’ve also been reading Gordon Bell’s Computer Engineering, pondering some of the older and earlier computing architectures. Caxton Foster’s Computer Architecture describes a simple computer architecture called “Blue”, which has only 16 instructions, and uses only direct addressing. It’s a pretty primitive machine (more like […]

John Doran’s D16 Homebrew Computer

July 7, 2011 | Homebrew CPU | By: Mark VandeWettering

Just another link to inspire me in my glacial moves toward designing a CPU of my own: The D16/M is a general-purpose, stored-program, single-address, 16-bit digital computer using two’s complement arithmetic. It manages subroutine calls and interrupts using a memory stack. The processor may directly address 64K words of memory or I/O. Its timing and […]

Time for some blog maintenance…

July 7, 2011 | Blogging | By: Mark VandeWettering

My blog may be unavailable for a short time today as I perform some needed upgrades. If all goes well, any down time should last only a few minutes. Don’t despair! I’ll be back shortly. Addendum: Upgrade seemed to go smoothly and without any problems. If you are experiencing any strangeness, try refreshing this page. […]