Software › Factorial — multiply by repeated addition
Factorial — multiply by repeated addition
demo Open · freely redistributable
An original paper-tape program that multiplies 1×2×3×…×7. The Harwell machine had no multiplier hardware, so multiplication is performed by repeated addition (and division by repeated subtraction); here you watch the accumulator dekatrons count up on every product until the result 5040 stands lit in the tubes. From-scratch decimal model, no CPU, no ROM.
Not hosted here.
Format: Decimal paper-tape program · By: emulators.org · Licence: Public domain (CC0)