Operating Systems

That’s a Verifone credit card terminal at the King Soopers #1 (13th and Speer in Denver, a.k.a. “Scary Soopers”) pharmacy, November 12, 2020.

What are all the packages?

What can we learn from this display?

The 6th Edition Unix kernel source code has a very weird struct:

/*
 * structure to access an
 * integer in bytes
 */
struct
{
    char    lobyte;
    char    hibyte;
};

It’s often said that DEC operating systems influenced the design of the CP/M microcomputer OS. Let’s examine that assertion by looking at how a process was laid out in memory.