Benningtons.net

Stuff what I did

Posts Tagged ‘logic’

8-Bit CPU – Clock Fix —

Improving the clock signal on my 8-bit “Hol-1” CPU. As my homebrew 8-bit CPU takes shape I find I’m continually fighting temptation to re-design the boards that have been created so far. I realise though that that would be unproductive as no sooner had I created a version 2 of a board then I’d get […]

8-Bit CPU – ALU —

Building an Arithmetic & Logic Unit (ALU) with TTL logic. Recap: My quest to build an 8-bit central processing unit (CPU) from transistor transistor logic chips (TTL) continues. This initial venture into CPU design being very much guided by Ben Eater’s video tutorials for a computer built on breadboards. Please refer to Ben’s videos for […]

8-Bit CPU – Registers —

Building CPU registers with TTL logic and some blinkenlights. Recap: Previously I posted about my quest to build a computer’s central processing unit (CPU) from transistor transistor logic chips (TTL). This initial venture into CPU design being very much guided by Ben Eater’s video tutorials for a computer built on breadboards. Please refer to Ben’s […]

8-Bit CPU – Clock —

Building a CPU clock and controller from 555 timers and TTL logic. Update: Please note my later post which contains an improvement to this TTL clock signal generator. Why?: Back in 2015 when I posted an item on Logic Buffers I intended to produce follow-up posts covering common logic chips. Producing each in a simple […]

Logic buffers —

With computer programming I’m drawn toward low level languages. Somehow hoping to understand what all the 1’s and 0’s are doing to truly feel in control of the computer. An understanding of those basic building blocks is really important even though using them in most projects would be too time consuming and error prone. With […]