Design and implementation of a VMEbus system services card

The System Services Card (SSC) is a multifunction VMEbus module designed to provide useful debugging features for the code development and system services that are needed in most configurations. The SSC was designed to provide a wide range of services for VMEbus computers at Fermilab. The object was to consolidate into a single card many of the functions that are now scattered over several cards or are not provided at all. A high priority was put on providing a number of simple but useful interfaces between the programmer and the hardware to simplify code debugging. Most of the functions on the SSC have been tested in prototype form