Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
This article describes a hardware implementation for a BSM Configuration Array (BCA) to permit the BCA to operate main storage (MS) in a one-way interleave mode when the BCA is configuring MS for two-way or four-way interleave operation. Tables 1 and 2 show examples of BCA settings for MS interleaving of 2KB blocks between BSMs 0 and 1. The BSM size is assumed to be 4KB (kilobyte) each, but may be any 2n value, such as 8KB. In Tables 1 and 2, each level A, B, C or D in the BCA controls accessing to a contiguous 1MB (megabyte) area on a 1MB boundary in a BSM. (Image Omitted) A form of four-way interleaving is controlled by the BCA in Table 1. The example herein describes two 4MB BSMs with 1 MB levels in each.