David Riley wrote:
On Jan 6, 2012, at 6:37 AM, Pontus wrote:
> The topic says is all, can a PDP-11/23 (on a M8189
card) boot from
> MSCP devices? My guess is that you need proper roms on your BDV11 ?
> Would these usually be included?
The M8189 is a quad-height 11/23-plus card which includes bootstrap,
LTC, SLUs, etc and there wouldn't normally be a BDV11 in the same
system. The M8186 is the dual-height 11/23 card, and that would
normally have a BDV11 in the system. The original 11/23-plus bootstrap
ROMs are modified versions of the BDV11 boot ROMs and have the same boot
options -- no MSCP. Those ROMs would be labelled 23-339-01E2 and
23-340-01E2 (or sometimes 23-339E2 and 23-340E2).
Certainly mine can (8189 with BH roms). Technically,
it's an 11/23+,
but the only real difference from a /23 is the address lines (22 in
the /23+).
That's not quite right. The early 11/23 cards (M8186 dual-height) are
only 18-bit but all Rev.C and later 11/23 cards are 22-bit. All
M8189 are 11/23-plus cards and are 22-bit.
The only difference between different M8189 cards (apart from
inconsequential etch revisions) are the boot ROMS. The original release
-BA are 2K ROMs equivalent to BDV11 boot ROMs and they were used in
PDP-11/23-plus systems (BA11S box). Later ones such as -BE and onwards
that support MSCP were made specifically for microPDP-11/23+ systems
(BA23 box).
The KDF11-B CPU System Maintenance manual
(EK-245AA-MG-001) indicates
that all versions of the ROM should be able to boot MSCP, if I'm
reading it right.
No, the oldest versions can't. Only the ones intended for
microPDP-11/23+ system have MSCP support (-BE and later).
--
Pete Peter Turnbull
Network Manager
University of York