89 (machine)

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89 is type of time machine.

Machine specification

An 89 machine has a frontend face and a backend foctal.

Frontend

This pseudocode renders the time-machine front-end

function fib(n){let a=0,b=1;for(let i=0;i<n;i++)[a,b]=[b,a+b];return a}
const f=fib(11),n=12,s=[];
for(let i=0;i<n;i++)s.push(f*(f+i));

const rows=[[[13,0]],[[6,11],[20,1]],[[2,10],[24,2]],[[0,9],[26,3]],[[2,8],[24,4]],[[6,7],[20,5]],[[13,6]]];

function draw(){
  const k=Math.floor(Date.now()/1000)%n;
  const out=[];
  for(const r of rows){
    let line=new Array(33).fill(' ');
    for(const [c,i] of r){
      const t=i===k?'['+s[i]+']':' '+s[i]+' ';
      for(let j=0;j<t.length;j++)line[c+j]=t[j];
    }
    out.push(line.join('').replace(/\s+$/,''));
  }
  d.textContent=out.join('\n')+'\n\n'+s[k];
}
draw();setInterval(draw,1000);

Backend

Backend is a Time based brainfoctal interpreter which increments "time" and removes the e.g 21,10,99,88,77,66,55,44,33,22,11,00 from each tick's octal string; returning it from the string to output with the brainfoctal program which executes at that time.
The brainfoctal interpreter is also modified to support an expedient XKCD Random Number

        if c == '5':
            if tape[p] == 4:
                print('4', end='')

This is main specification of the backend.

def run():
    start = get_clock_start()
    tick_ms = 89
    next_tick = time.time()
    while True:
        run_once(start)
        next_tick += tick_ms / 729
        sleep_for = next_tick - time.time()
        if sleep_for > 0:
            time.sleep(sleep_for)

if __name__ == "__main__":
    run()

External Resources

• A backend interpreter can be found Here.

semantic note

A time machine is considered to be any type of machine which relates to Time.