Schematics!
The first draft of the BMOW schematics are finished, along with complete equation lists for the 11 unique GALs (18 GALs total). This is everything needed to actually build the machine. You can view it all on the technical info…
Month January 2008
Initial Schematics Complete
The first draft of the schematics are complete. It was a good exercise, as working out every connection for every chip forced me to consider a few points I’d glossed over before. I ended up having to introduce a few…
More Timing Analysis
The schematics are nearly done. I’ve finished all of them except the memory/device subsystem, which is proving to be difficult. Unlike the registers and all the other machine components, the RAM and the USB interface don’t use a clock. Instead,…
Logic Analyzer/Oscilloscope
My Hewlett-Packard 1631D logic analyzer / digital oscilloscope arrived today: the finest 1985 technology that $35 can buy. I bought it dirt cheap from eBay in “as is” condition, but it seems to be working great! With this acquisition, I…
Piles of Hardware
I keep accumulating more and more hardware, and my office is beginning to overflow with boxes, tools, and wires. I need to start turning this pile of parts into an actual machine ASAP. The first of my recent acquisitions was…
Digital Memories
While hunting for my soldering iron, I found my first digital electronics project gathering dust in a box. I thought I’d thrown it out long ago, so I was happily surprised to see it. It’s not much to look at–…
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