VLB operated closely with the 486 processor. This caused problems when designers tried to implement VLB in a Pentium based system. Also, the bus was tricky to program and timing issues were a concern. PCI is used exclusively in the Macintosh. PCI is starting to replace ISA in PCs due to its enhanced capability and performance over the other bus types.
Bus mastering is supported.
Multiplexing can be performed using the PCI bus. With multiplexing, address and data can share the same line on the bus. Burst mode allows the transfer of multiple data pieces in rapid succession once the starting address is established. The VESA Local Bus demonstrated a need to increase video performance. Many 3D graphics accelerators are available to increase video performance.