cpu6502.mjs

import "./instructions.mjs";

export class Cpu6502 {
	A = 0xFF
	lda = lda
	#rts = function() {
		return "RTS";
	}
	ldx() {
		return this.lda();
	}
}

instructions.mjs

export function lda() {
	return this.#rts();
}

main.mjs

import "./cpu6502.mjs";

console.log((new Cpu6502).ldx());