13 Oct
2008
13 Oct
'08
8:41 p.m.
Are these the most recent versions of 11/23+ proms?? I
have an 11/23+
that I was going to update.? Are both of these versions compatible
with all M8189 boards and would the M8189-BG version be the better
image to use?
Got me on that one.?? All of the boards I've ever owned
have had proms -183 and -184.?? I was thinking those
boards were -BH, but I could be mistaken; they might
have been -BF . . .
As long as they would boot DU/MU, and supported auto-boot,
I wasn't terribly concerned about anything else. . .
T
14 Oct
14 Oct
12:37 a.m.
On 14/10/2008 04:41, tiggerlasv at aim.com wrote:
The exact same board (M8189) is used for two different machines,
PDP-11/23plus and microPDP-11, the difference being the ROMs (and the
chassis) used. It's the ROMs (alone) that that make the difference to
the suffix, and therefore whether the board is designated an 11/23plus
CPU or a microPDP-11/23 CPU.
23-339E2 and 23-340E2 are 2k x 8 and make an PDP-11/23plus (-BA)
23-158E4 and 23-159E4 are 8k x 8 and make a microPDP11/23 (early -BE)
23-238E4 and 23-239E4 are 8k x 8 and make a microPDP11/23 (later -BE)
23-183E4 and 23-184E4 are 8k x 8 and make a microPDP11/23 (-BF)
23-380E4 and 23-381E4 are 8k x 8 and make a microPDP11/23 (-BG)
23-453E4 and 23-454E4 are 8k x 8 and make a microPDP11/23 (-BJ)
When DEC brought out the microPDP-11 series they also brought out a
range of I/O and storage devices to go with them; the difference between
the "plus" and "micro" series bootstraps is partly support for those
devices, but they also are more interactive. So there was only one set
of ROMs released for the PDP-11/23plus but several sets for the
microPDP-11/23. The later the version, the more MSCP boot devices are
supported, and you're supposed to upgrade the ROMs in a KDF11 to match
those in the RQDX1 or RQDX2 controller *and* vice-versa, and you should
definitely use -BF or later for RQDX3. Version -BG (called -BH in some
places, it's the same ROM set and same code) introduced TK50 boot
support, and -BJ refined that to make it more reliable.
--
Pete Peter Turnbull
Network Manager
University of York
Are these the most recent versions of 11/23+
proms?? I have an 11/23+
that I was going to update.? Are both of these versions compatible
with all M8189 boards and would the M8189-BG version be the better
image to use?
Got me on that one.?? All of the boards I've ever owned
have had proms -183 and -184.?? I was thinking those
boards were -BH, but I could be mistaken; they might
have been -BF . . . 
8:14 a.m.
On Tue, Oct 14, 2008 at 12:37 AM, Pete Turnbull
<pete at dunnington.plus.com> wrote:
The exact same board (M8189) is used for two different machines,
PDP-11/23plus and microPDP-11, the difference being the ROMs (and the
chassis) used. It's the ROMs (alone) that that make the difference to the
suffix, and therefore whether the board is designated an 11/23plus CPU or a
microPDP-11/23 CPU.
23-339E2 and 23-340E2 are 2k x 8 and make an PDP-11/23plus (-BA)
23-158E4 and 23-159E4 are 8k x 8 and make a microPDP11/23 (early -BE)
23-238E4 and 23-239E4 are 8k x 8 and make a microPDP11/23 (later -BE)
23-183E4 and 23-184E4 are 8k x 8 and make a microPDP11/23 (-BF)
23-380E4 and 23-381E4 are 8k x 8 and make a microPDP11/23 (-BG)
23-453E4 and 23-454E4 are 8k x 8 and make a microPDP11/23 (-BJ)
Thanks for the details here. I have a pair of 2716's in my M8189 so
that must be the earliest version. I have some MCM68766's I can
program and drop in place and I'll go ahead and do that now that I
know it should work.
You have the 23-380E4 / 23-381E4 images on your site. Do you also
have the 23-453E4 / 23-454E4 images?
-Glen
10:33 a.m.
On 14/10/2008 16:14, Glen Slick wrote:
Thanks for the details here. I have a pair of
2716's in my M8189 so
that must be the earliest version. I have some MCM68766's I can
program and drop in place and I'll go ahead and do that now that I
know it should work.
You have the 23-380E4 / 23-381E4 images on your site. Do you also
have the 23-453E4 / 23-454E4 images?
Sorry, all the ones I have are on the site.
--
Pete Peter Turnbull
Network Manager
University of York
5914
days inactive
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days old
3 comments
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glen.slick＠gmail.com -
pete＠dunnington.plus.com -
tiggerlasv＠aim.com