Compaq 21264 Hardware Reference Manual page 138

Bcache Port
Term
Ratio
rd_wr
wr_rd
Cache and External Interfaces
4–50
Description
The number of GCLK cycles per peak Bcache bandwidth transfer. For example, a
ratio of 2.5 means the peak Bcache bandwidth is 16 bytes for every 2.5 GCLK
cycles.
The minimum spacing required between the read and write indices at the data/tag
pins, expressed as GCLK cycles.
The minimum spacing required between the write and read indices at the data/tag
pins, expressed as GCLK cycles.
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