0010 – Free Run and Hex Display

The first test of every new microprocessor  "single-board" project is free-run. Once the CPU, clock, and reset circuitry is in place, we hardwire the data bus to supply the data pins on the 6502 with its opcode NOP (No-Operation). The hexadecimal for the NOP instruction is $EA. This is a simple do-nothing opcode that basically… Continue reading 0010 – Free Run and Hex Display