RE: IM21

Hi Duaine,

> The dual ready protocol of the standard is borrowed from PCI and other
> similar systems. Here are some clarifications.

Thanks for the clarifications. I propose to include these under
the description of the dual ready protocol in Section 5.1.1. If
something is not explicitly forbidden people may assume it is
allowed . . .

> Point #4: The sender must hold the message CONSTANT otherwise
> there could be a race between the data change and the receive ready.

Are you saying the standard prohibits snooping internal state
with an output port without latching it in a holding register
first? I agree with what you state if a specific message is
being sent, but if the user is snooping internal state and does
not care exactly when the sample is taken, then I don't see
a problem. What do you think?

Per
Received on Wed Mar 24 12:55:41 2004