25 Dec
2000
25 Dec
'00
5:20 p.m.
On Dec 25, 18:23, Tony Duell wrote:
They are the same -- I misread a diagram in the RX02 manual, which made me
think the M8357 working as an RX28 could do DMA transfers. It can't. Only
the RX211 and RXV21 use RX DMA INTR L.
I'v just pulled the printset of that card (which, alas, says
> TT is DRV AC L and VV is RX DMA INTR L. These
are the extra
connections
used by RX211
and RXV21 controllers, and I expect RX28 also uses RX DMA
INTR L.
I don't think it doea.
I believe that The RX8e card and the RX28 card are the same module -- an
M8357. nothing about the DB25 adapter), and the only pins
shown on the schematic
are
D : RX RUN L
H : RX INIT L
J : RX ERROR L
T : RX TRANSFER REQEUST L
X : RX DONE L
BB : RX DATA L
FF : RX 12 BIT L
RR : RX OUT L
LL : RX SHIFT L
Interesting. I think where you wrote "H : RX INIT L", you mean "N".
H is
a ground, and the RX02 printset clearly shows N as RX INIT L. That agrees
with the tracks I can see on the M7744.
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York