News for hackers. Stuff that matters.

A comment on Throbac: THrifty Roman numeral BAckwards-looking Computer. Parent comment

Re:Throbac: THrifty Roman numeral BAckwards-looking Computer by wolfgang42 on Friday November 01, 2024 @01:44PM (#42019555)
After staring at the linked PDF for a while, I think the display was a collection of lightbulbs (presumably behind a mask plate), probably arranged something like this:

     Upper dial   V XV
     (Quotient)    III
  
     Lower dial LLLVV
  (Accumulator) XXX X
                   IIII
[ Parent | on HN ]
Re:Throbac: THrifty Roman numeral BAckwards-looking Computer by schlauerfox on Friday November 01, 2024 @03:13PM (#42020504)
Yeah, it's a relay counter like a score motor in a pinball machine, but each rotor is different since the I is mod 5, the V is mod2 and the LX is mod 80, directly connected to the lights. The principles discussion is well done. Wow I love old tech documentation! I still don't have a good visualization of what the display 'dial' looks like
[ Parent | on HN ]