The original BMOW: a custom-designed, hand-built 8-bit CPU and computer.
While waiting for the parts I need for the video system, I ported the machine language monitor from the Apple II ROMs to BMOW. Somehow I’d never gotten around to writing an interactive program to examine and modify memory, which…
I’ve been thinking some more about the best way to set up the palette for BMOW’s video system. It’s the only part of the design that I’m not really happy with. There are a number of different options I’m considering.…
The high-level design of the BMOW video system is mostly complete now, but is scattered across eight pages of scrawled notes and the inside of my head. It’s proving to be a complex beast, and there are still many smaller…
My loftiest of stretch goals for BMOW is to build a primitive video circuit, and connect the machine to a standard VGA monitor. To that end, I did some prototyping experiments on a breadboard recently to experiment with video generation.…
After a LOT of fiddling, I finally pulled off a successful multitasking demo. It’s not the most exciting thing in the world to watch, but once you understand what’s happening, you’ll appreciate the nerd factor. The photo below shows BMOW…
I made a little progress this week on separating what I hope will eventually become the operating system software from everything else. Up until now, all the test programs I’ve written have essentially been the operating system, or part of…
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