A hardware monitor study of a CDC KRONOS system
David S. Lindsay · 1976
This study was performed on a CDC-6600 computer having 500K of Extended Core Storage (ECS), twenty Peripheral Processor Units (PPU's) and twenty-four I/O channels, as shown in Figure I-1. The CPU can load, store, and execute from the 131K of 1 microsecond storage which comprises CM. It can also access ECS, but this access is limited to transferring blocks of data between CM and ECS at the rate of ten 60-bit words per microsecond. The CPU cannot access peripheral devices in any manner whatever.