11 June 2018
I rescued this unmutilated OEM version of a DEC PDP-11/23 with CPU, memory, HD, 8" floppy and 8 serial ports made by Scientific Micro Systems around 1986.
My goal is to restore it, document it, and do some PDP-11 software development.
I need bootable floppies and documentation. Utilities to work with the hard disk would be great. If you have these, please let me know. The brochure says this system can boot RT-11, RSX-11M, RSX-11M-Plus and TSX-Plus, and that it's compatible with RX02 disks so maybe it will boot a stock RT11 disk, I don't know.
10.5" high with hinged top.
Heavier than a dog house.
Model # DSX01174, Assembly # 1002003-0011 D
Label, back, front
OS251 by Optimal Systems Corporation.
No documentation found.
One powers the DEC backplane and one powers the drives.
Both supplies are bad and have been replaced with modern switchers.
+5, -12, +12, +24
1 M8186 KDF11-A CPU board with 1 chip LSI 11/23 top, bottom
2 SMS disk controller cabled to another giant disk board then to HD and floppy. SMS zC2M top, bottom
3 Sigma quad serial (1st port displays boot prompt) top, bottom
4 Sigma quad serial
5 Kaiser & Damm, MOT 11 D1 with ribbon cable to, RAM and ROM, 6809, ROMs. CALMOT '83 top, bottom
6 Kaiser & Damm, MM07 (memory management?) 11.Aug.83 top, bottom
15-16 Camintonn CMV1000 memory board (probably 1mb) top, bottom
The large disk controller board is mounted on the hinged top panel.
Cables go to the SMS board in the backplane then to both the HD and FD.
8" Quantum Q2020
512 cyl, 4 heads, 32 sec/trk, precomp:256, landing 513, bytes/sec 256
Does not boot.
q2020a.png q2020b.png q2020c.png q2020d.png q2020e.png q2020f.png q2020g.png q2020h.png q2020i.png q2020j.png q2020k.png q2020l.png
8" Double Sided
It's a shame there's so much bitrot on the webs and some of these links are dead.