Just clarification ....
On Tue, 17 Feb 1998 14:35:26 -0800 (PST)
Greg Shue <gregs at sdd.hp.com> wrote:
(snip)
Message below is not from me. It's from Nagasaka-san.
> [Akihiro Shimura]
[Fumio Nagasaka]
> > I would like to introduce these rules shown below,
> > 1) The initiator clear Unsolicited_Status_Enable register to forbid
> > the target
> > to issue unsolicited status which says "Data Available", while
> > the initiator
> > is appending new ORBs in the list.
> > 2) The target shall observe Unsolicited_Status_Enable register,
> > whether or not it is
> > set to one, before it scans linked list of ORBs.
> > 3) When the target found Unsolicited_Status_Enable register is set
> > to one,
> > and there is no in-ORB in the list, then the target may send unsolicited
> > status.
> >
> > Then the initiator will not generate too many in-ORBs in the list.
>> [Greg Shue]
> There are some problems with the rules:
>> Rule 1 changes the definition of SBP-2. SBP-2 does not provide a
> mechanism for the initiator to clear the Unsolicited_Status_Enable
> register. A write of _any_ value to the register enables
> unsolicited status.
>> Rules 2 & 3 assume that an Unordered processing model is used.
> See my previous comment.
>> Because the ORDERED processing model is used, the rules are unnecessary.
--
Akihiro Shimura (shimura at pure.cpdc.canon.co.jp)
Office Imaging Products Development Center 3
CANON INC.