KA9Q Mirror
An impressive early implementation of TCP/IP
Mirror directly approved by Phil Karn, KA9Q.
The KA9Q NOS TCP/IP package began life way back in 1985 on a surplus Xerox 820 computer board running CP/M with a 4 MHz Zilog Z-80 CPU, 64KB of RAM and a 8" floppy drive holding all of 243KB. Later, it moved to the IBM PC with the 8088 and 80286 CPUs running MS-DOS.
KA9Q NOS was only the second known implementation of the Internet protocols for low-end computers. Unlike PC/IP, KA9Q NOS could simultaneously act as an Internet client, a server...