Remove these screws to separate the VCAM from the IO4 board

The VCAM interfaces the computer to the VME bus and graphics (PowerChannel bus)

PowerChannel controller ASICs and connection to VCAM board

HIO expansion connections for disk, graphics, audio, or other peripherals; and controller ASICs

Dallas real-time clock and battery backed NVRAM

WD33C95A SCSI controllers

VME interface and glue logic

SCSI riser boards: red is differential, green is single-ended. The system can be configured for two diff, two SE, or one of each.