21 Jun
2005
21 Jun
'05
2:31 p.m.
On Tue, 21 Jun 2005 Paul Koning <pkoning at equallogic.com> wrote:
No, it's not the MOVC, but the MOVC would probably also be acceptable.
RSX have a macro to define the instruction, called MOVR$
It takes three arguments, in the form of three registers. The opcode is
075abc
a is source
b is destination
c is length
all as registers. It copies the data according to this.
RSX detects wether this instruction exists at boot time, and patches the
system if it does, to take advantage of it.
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
>>>> "Johnny" == Johnny Billquist <bqt at Update.UU.SE>
writes:
Johnny> Mentec implemented one additional instruction that really is
Johnny> useful, and which atleast RSX will use, if it finds it, and
Johnny> that is a block copy instruction. I don't even know if it has
Johnny> a mnemonic. Moving large chunks of memory is something the
Johnny> systems does a lot in I/O, so that really helps if it can be
Johnny> done faster.
Is that just the MOVC instruction (part of the CIS optional set) or
something else? If CIS is present, RSTS will use MOVC for block move
automatically.