First Hardware
I bought a used Augat wire wrap board off eBay. It’s a huge 2D array of hollow gold pins, 12″ x 7″. Chips are pushed into the component side of the board, fitting the legs of the chips into the…
Design Progress
Programming update: I wrote a simple microcode assembler, and used it to implement a dozen or so common instructions. Then I wrote a few simple programs using those instructions, to count through a loop a fixed number of times, and…
First Simulation
It simulates! I completed the Verilog description of the machine, and after fixing one place where I’d used an active high instead of an active low enable single, it worked like a champ. I implemented the microcode for NOP, JMP…
6502 Inspiration
The design of my machine has been significantly influenced by the 6502, the microprocessor used in most 80’s home computers, and the one with which I’m most familiar. There are no published descriptions of the 6502 internals that I know…
Component Details
An explanation of the components shown on the block diagram I posted yesterday. Registers: A is the accumulator register, although the hardware assigns it no special significance, and X can do anything that A can. X is the index register.…
The Adventure Begins
After several weeks of digging through the details of other designs, re-reading my college texts, sketching out data paths, and writing test microcode for my various design ideas, I arrived at what I hope is a mostly-complete block diagram for…
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