MicroChannel Architechture (MCA) bus connectors only appear in IBM PS/2 computers (with few exceptions). The bus
connector transmitted either 16 or 32 bits of data, using bus mastering to allocate IRQ and DMA channel resources. PS/2
systems had only MCA connectors in them; no ISA or EISA connectors were allowed in such systems. Because few
manufacturers adopted the MCA standard, and because IBM was the sole source for MCA adapter cards, the MCA bus
became obsolete. No current technology PCs use an MCA bus structure.


Pc Repair Northampton