> The Doom install image was 35x the size of the Apollo guidance computer.
Keep in mind that the AGC was a necessary but not sufficient piece of hardware for navigating to the moon, and was extremely special-purpose. NASA had several big (for the time) mainframes that
1) calculated the approximation tables that were stored in AGC ROM (each mission required a new table because the relative positions of the earth, sun and moon was different)
2) reduced soundings from earth-based radars to periodically update the AGC's concept of its position.
3) other things that I've forgotten
In other words, the AGC required the assistance of a ground-based computer with dozens of megabytes of RAM and hundreds of megabytes of storage. That will fit on your phone quite easily, but let's not minimize the requirements for celestial navigation.
Keep in mind that the AGC was a necessary but not sufficient piece of hardware for navigating to the moon, and was extremely special-purpose. NASA had several big (for the time) mainframes that
1) calculated the approximation tables that were stored in AGC ROM (each mission required a new table because the relative positions of the earth, sun and moon was different)
2) reduced soundings from earth-based radars to periodically update the AGC's concept of its position.
3) other things that I've forgotten
In other words, the AGC required the assistance of a ground-based computer with dozens of megabytes of RAM and hundreds of megabytes of storage. That will fit on your phone quite easily, but let's not minimize the requirements for celestial navigation.