31 Mar
2008
31 Mar
'08
3:06 p.m.
On Mon, Mar 31, 2008 at 05:59:11PM -0400, Patrick Finnegan wrote:
On Monday 31 March 2008, Dennis Boone wrote:
Supposedly, no the RLV11 is 18-bit or less only. The RLV12 is what
you're supposed to use in a 22b system.
I've heard that one can use a bounce-buffer to use an RLV11 in a 22-bit
machine (but the RLV12 is preferred, of course), however, the OP was
asking about an RL11, an 18-bit Unibus interface.
I have used an RL11 in my 11/24 w/KT24 (to load real 2BSD from real magtape),
so I'm pretty sure it works fine in a 22-bit environment (but I can't say
if the KT24 just smooths over DMA buffer address issues or what). Dunno if
you can stuff an RL11 in an 11/70 or not, but I would hope so (since there
really aren't any Unibus peripherals that "know" about 22 bits).
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 31-Mar-2008 at 22:00 Z
South Pole Station
PSC 468 Box 400 Temp -59.4 F (-50.8 C) Windchill -99.5 F (-73.1 C)
APO AP 96598 Wind 16.9 kts Grid 33 Barometer 691.4 mb (10201 ft)
Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html
CSR are
774404, and 774400 respectively, but in the back of the
18 bit bus addresses.
shown as being at 174404 and 174400 respectively.
16 bit bus addresses.
I'd have to look up the RL11 to know if it could be used in a 22 bit
machine, but if so, it'd be 17777404 and 17777400.