Wait-State Insertion for Expansion System Interface
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Contemporary personal computer systems contain a fixed number of feature card slots for I/O attachments. One way of enabling users to attach more peripherals than are permitted by the existing complement of card slots is to provide an expansion unit, analogous to a peripheral device multiplexer/controller, with multiple additional feature card slots and adapter cards for linking any feature slot in the computer system to any slot in the expansion unit. Desirably, these adapter cards should operate to make the extension interface transparent busing facilities in the computer system. An adaptation arrangement satisfying these objectives is described in the preceding article. This article concerns a wait-state insertion feature of that arrangement. Referring to Fig.