I believe you (or he) meant "Microchannel."
Microchannel was an architechture brought to market by IBM. It was the "big thing" when they brought out their PS/2 line of computers. The computers ranged from the "Model 30" (which still had ISA) up to the "Model 80" (the top -of-the-line: lots o' slots and the current hot processor).
The licensing fees for Microchannel were "a little high" so Compaq and other PC manufacturers (The "Gang of Seven," I think) developed EISA to address many of the same concerns that Microchannel was supposed to clear up.
Both systems required driver disks that would register the new expansion card (NIC, Video, Serial, Irma, etc) with the system for proper resource allocation (IRQ, DMA, Memory Map, etc).
There were another couple attempts to overhaul the PC bus after that (like VLBus) until PCI came along.
Those were interesting times....
FWIW
Scott