Question

Problem 1. Suppose we have 4 memory modules instead of 8 in Figures 4.6 and 4.7. Draw the memory modules with the addresses they contain using:

a) High-order Interleaving and

b) Low-order interleaving.

Answer 1

Answer

Suppose we have 4 memory modules instead of 8 in Figures 4.6 and 4.7. Draw the memory modules with the addresses they contain using:

single memory module causes sequentialization of access Only one memory access can be performed at a tone M Interleaving, which splits  memory across multiple memory modules, can be used to help relieve  this .

a) With high-order interleaving the high-order bits arms address are used This type of interleaving  distributes so that   addresses so that each  module co tams consecutive addresses In this case, Me leftmost hits select the module while the right-most selects the offset within the module .
Hence. in the case that we have e byte -addressed, e memory of 32 bytes. if. have d modules, then each would need to be bytes each and they would be arranged  as follows.

10,With low-ordered interleaving, the low-order ts of the address are used to select the bank Low-order interleaved places consecutive  addresses of memory in different memory modules.

The night - most bits  are used to determine the module while the left-most select the offset mt. the module While the left-most select the offset within the module.
Hence. in the case that we have  a byte- addressable memory of 32 bytes. d we have 4 modules, then each would need to be 8 bytes each and they would be arranged as follows :