A GX5150 (Master) DIO board has a 16-bit register that can be set by software to simulate an event on the External Event lines. This allows testware to be verified under user control without requiring the actual hardware.
A GX5105 Timing Module has a general purpose stand-alone programmable “B clock”. The clock can be set from 1MHz to 120MHz. Using this clock allows testware to be simulated and verified under user control without requiring the actual hardware.