12 Jan
2019
12 Jan
'19
1:30 p.m.
On 01/12/2019 04:14 PM, Bill Gunshannon via cctalk wrote:
On 1/12/19 2:25 PM, allison via cctalk wrote:
BA11 box
with one of the usual two common backplanes or standard BA23.
Problem with DEQNA is what OS?? RT11 does nothing with it.? RSX-11
I don't have a recent enough version so its often unused/
On 01/12/2019 12:29 PM, Pete Turnbull via cctalk
wrote:
My 11/23+ is in a box labeled PDP-11/23PLUS on the front
with
three toggle switches. :-) It has a 9276-A backplane labeled
OPTION 11/23B. It is a 9 slot, Q22 A-B-C-D . That's the home
for my next system which will (hopefully) have 2 meg of memory,
a DEQNA and an Andromeda Card for a small hard disk and 8" floppy. On 12/01/2019 01:24, Zane Healy via cctalk
wrote:
Pete,
Your right the 11/23+ showed up on a lot of boxes but not the BA123
though it would fit. I?m pretty sure you could get the /23+, /53, /73,
/83, and /93 in
either a BA23 or a BA123.? I have an actual badged BA23 pedestal for
my /23+.
I'm fairly certain all microPDP-11/23+ systems were only sold in
BA23
boxes, and I think microPDP-11/73 and the later, cheaper, cut-down
11/53 were as well.? But almost all the 11/83 systems I've ever seen
were in BA123 boxes, though they did sell some in BA23 pedestals -
I've got one.
I also plan on another small 11/23 with 128KW of
memory and an
18 bit backplane so I can use the RX02 emulator. And, probably
an Andromeda in there, too
To bring my part of this discussion to an end, I now have a BA23
MicroPDP box with an 11/73 CPU, 4 meg of memory, DHV11 for eight
serial lines (probably only use one to talk to a TU58 emulator
but the DHV11 was just sitting there looking lonely) a DEQNA
and a CMD SCSI Controller set for 6 disks and one tape. Only
thing it lacks at this point is software.
The TU58 like a responsive IO a DLV11J is
a better choice for console and DD
and works best if first card after the memory (early in the interrupt
grant chain).
The simulators are faster than tu58 so it makes for fewer retries.
I use DHV11 for terminal and modem lines (slower stuff).
On to my next project.
Thanks for all the help. I had forgotten just how much fun
real computers were compared to PC's and MAC's.
Yes they are.? Their
performance without all the gui gunk is often a
suprize
to many that have not worked with them.
Allison
bill