[comp.sys.dec] microVAX memory

pstevens@pioneer.arpa (Paul Stevens RCE Sterling) (07/31/87)

I am in the process of putting together a microVAX II based data
acquisition system in which it is intended to use DRQ3B's in block
mode DMA.  In some of the DEC related periodicals I have seen 
indications that not all memory boards support block mode DMA.
This seems strange as I thought that block mode was function only
of the DMA controller and how that controller used the bus.  My
question is therefore twofold:

1) Is is true that not all memory boards support block mode?

2) What is it about a memory board that would preclude using
   block mode?

respond as you see fit: net,email,phone and thanks in advance

P. Stevens
(415)-694-4887
sorry I'm too new to the net world to suggest paths for email.