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No more loopy wires

A project log for 8 Bit Breadboard CPU

A home-brew 8 bit Microprocessor built on a breadboard 64K Address Space, IRQ, and DMA 16 Bit Stack Pointer, 4 8 bit Registers or 2 16 bit

2-zons2-Zons • 02/17/2019 at 20:47•4 Comments
Finished routing all the control signals to a single board.  Need to build a few more ribbon cables for the address bus, data bus connections and LED's.  Looks much neater now.  Modules completed thus far (from left to right in picture): RAM / ROM module, ALU, XY register, stack pointer, and AB register.
Previous log

Added RAM and ROM module

02/10/2019 at 04:24 • 2 comments

Discussions

Amos wrote 03/03/2019 at 00:16 • point

Good job taming the wiring beast! That looks really good. 8^)

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tophalfofabarn wrote 03/02/2019 at 20:08 • point

It looks very clean, but you need decoupling capacitors at every chip and possibly some electrolytic capacitors throughout the power rails. If you have an oscilloscope you should probe the 5V line all of the way at the end and I'm sure you'll see a significant amount of noise on the line as the computer clocks. This is the sort of thing that causes spurious problems as you add more chips or try to clock faster.

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Dave's Dev Lab wrote 02/17/2019 at 22:02 • point

looking really good! the organization and color coding looks fantastic!

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2-Zons wrote 02/17/2019 at 22:19 • point

Thanks

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