Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
AbstractAn Arrangement is provided to control large volumes of data from a high speed disc or similar medium to a large capacity memory at negligible data rate loss and yet use only a small processor.
An Arrangement is provided to control large volumes of data from a high speed disc or similar medium to a large capacity memory at negligible data rate loss and yet use only a small processor.
The Pattern Controller (PC) 1 in Fig. 1 comprises apparatus which can transfer large volumes of data from a disc medium 2A, through its control unit 2B, to a large capacity memory (LCM) 3 at or close to the input/output maximum data rates. The Pattern Controller is also capable of transferring smaller volumes of data to and from disc system 2 and in particular disc medium 2A, through its control unit 2B, to and from small processor 4. For the purpose of discussion, only a disc subsystem has been identified, but in actual implementation any standard storage medium (i.e. disc, drum, tape, etc.) with a defined interface protocol may be used.
Typically, processor 4 may comprise an IBM Series 1 (S/1), while the disc system may comprise an IBM 3830/3330. The LCM may typically comprise a modified IBM 3168 Main Memory. With such an arrangement it is then possible to identify the necessary interfaces, as more particularly shown in Fig. 2.
In Fig. 2, the interface (a) between S/1 and PC comprises the
standard IBM Series 1 Users Channel which includes a Direct Program
Control (DPC) adapter and the Series 1 Integrated DI/DO channel as
described in System 3168 Memory Frame, IBM Publication GA34-0033,
Chapter 6 and S/1 Theory of Operations, Chapter 7 (user attachment).
By the same token, interface (b) comprises the standard IBM Systems
360/370 "OEM" Interface, as described in System Frame, IBM
Publication GA22-6974-2, IBM IBM System/360 and System/370 I/O
INTERFACE Channel to Control Unit OEM's Information. The interface
(c) comprises the existing processor interface used by the TOOL PATTERN MEMORY of LCM 3 to communicate between the LCM and the Series 1 (to and from the processor) via a standard IBM Direct Memory Address Interface (DMA I/F). The interface (d) is the established special interface for communicating with the user input port for a Direct Memory Access (DMA) I/F. Finally, the interface (e) is the established tool interface for communicating with the user output port for a DMA I/F. The four modes of operation are as follows:
1. Pattern load from processor...