CBLT32 timing tests:

Scope plot of *AS line during CBLT32, 56 word transaction (Hit Count Buffers),
with 4 boards in crate (slots:7,10,16,21) and our old Crate CPU.

- 225 ns per 32-bit VME word. => 17.78 MB/s on the backplane.

Scope plot of *AS line during CBLT32, 166 word transaction (Hit Data Buffers - same event),
with 4 boards in crate (slots:7,10,16,21) and our old Crate CPU.

- 229.52 ns per 32-bit VME word on average => 17.47 MB/s on the backplane;
- the 4.5 ns difference comes from the *AS getting High for 180 ns after each group of 64 words.

CBLT32/64 timing tests:
 
 

Hit Count Buffers, 2 boards:
 

CBLT32 - 112 Bytes
 

CBLT64 - 128 Bytes
 
 

Hit Data Buffers - 2boards:
 

CBLT32 - 416 Bytes   => 18.22 MB/s on the backplane

*AS line:

CBLT64 - 416 Bytes  => 35.86 MB/s on the backplane

*AS line: