Hi,
I'm the new owner of the 2 PDP-11/Ms that Paul retrieved from the skip.
The populated machine is in pretty good shape and seems to be complete.
The chassis only machine should also be bought back to life as I've
managed to locate most of the boards required to rebuild it (just need
to find some memory)
I'm going to be documenting the machines restoration on my blog which
I've setup here:
http://www.pdp8.co.uk/
Thanks,
Toby
On Tue, 2008-11-11 at 03:32 -0800, Julian Skidmore wrote:
Hi folks,
I guess people have looked at the pdp-8/m-2 Chassis:
http://hisdeedsaredust.com/pdp/pdp8m-2/04112008359.jpg
There are some interesting goodies as it's completely max'd out!
It appears to have 3x8K memory (a stunning 24K!).
M8320 = OmniBus Bus terminator loads.
G111 = 8K Memory.
M849 = Memory Shield.
M8357 = RX8E (8" Dual Floppy controller).
M8650 = Teletype control.
M847YA = Hardware Bootstrap Loader.
M8350 = Posibus interface (surprising).
M837 = Memory Extension / Timeshare.
M8300 = CPU Regs.
M8310 = CPU Regs Ctrl.
M8330 = CPU Timing.
It was last tested (amazingly) as late as July 1990, a mere 18 years ago.
Again, I'm wondering who took the pdp-8/m: Was it the Surrey Museum or Peter?
Also Peter, you said it was a simple circuit, do you have the circuit diagrams and
procedure for converting a normal PC-based 5.25" Floppy drive to work as an RX-50? I
did use PUTR recently on a PC to transfer RT-11 to 5.25" disk so I could install it
on my pdp-11/73 (before the PSU failed!); so I know they *can* be used in some sense.
Also Johnny, are you actually offering a pdp-8/m or /f!!!!?
-cheers from julz @P
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