pcb

PCB

A simple binary showing how to interface CPU and RAM.

This has the interfacing set up using pcb! macro, and has the following program hardcoded by default, which can be changed if needed, but you will need to manually compile the instructions to u8 for the CPU instruction set.

This will add up 0-5 numbers and store result in mem loc 52

mvi a 0
mvi b 5
add
xchg
sbi 1
jz 13
xchg
jnz 4
xchg
mov 52 a
hlt

To run simply run cargo run, but the output will be a bit uninteresting by default. It will show memory locations 50-55 before and after execution of the above program. It is better to see the program running tick-by-tick in the web-interface.

This code takes roughly 225 ticks to complete. This number also includes the ticks needed for instruction-cache refilling, cache-invalidation after jumps and refilling etc.