sentences:  Later Firefly systems used a memory module with a capacity of 32 MB, for a memory capacity of 32 to 128 MB.The memory access time in the original MicroVAX-based Firefly was 400 ns, while the CVAX version had a memory access time of 200 ns.I/O devices were connected to the system via the Q-Bus, whose 22-bit address space was mapped onto the 24-bit memory address space of the Firefly by using mapping registers controlled by the master processor.