diode matrix meaning

• I once hand-wired a 30 byte diode matrix containing a ROM paper tape loader subroutine . . . ROM chips were prohibitively expensive and that was the only way to boot my hand-built Intel 8008 home computer.
• The microsequencer of many early computers, perhaps starting with the Whirlwind ( computer ), simply activated each row of the diode matrix in sequence, and after the last row was activated, started over again with the first row.
• The control store is a diode matrix : a two-dimensional lattice, where one dimension accepts " control time pulses " from the CPU's internal clock, and the other connects to control signals on gates and other circuits.