Northstar S-100 Motherboard

Photos of a Northstar Computer S100 motherboard.

There  are two serial ports, bootstrap rom and options, and a parallel in and out port on the rear of the motherboard, along with regulation for that logic, and for the +5 +12 for the floppy drives in the system.

Link is for Horizon system, but includes motherboard schematic.

http://bitsavers.org/pdf/northstar/ns_hrzd.pdf

PDP 8A Limited Function Front panel

Limited function panel

 

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B 36 D & F Load Adjuster

B 36 Load adjuster.  Includes a large bomb bay.  This was the successor strategic bomber for the US prior to the B-47, then the B-52.  it is essentially a scaled up B-29 aircraft with more power.

Most were flown for longer than such retired aircraft as the B-47 which were retired when found to be not up to the task, as RB-36's.

My cousin Doyle Sharp served his Air Force time mostly as a member of an crewman and flew a lot from Offutt AFB at Omaha, Nb

Front portion of the slide rule

Portion of legend on the fixed portion (rear) of the slide rule

Note big boom in Bay 3.


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IBM wire panel tools.

Here's a large collection of images of these tools.  My tools are the first one below.  Used for adjusting wires on unit record programming wire panels.

auction (while it lasts)

Vintage-IBM-wire-insert-eject-tool-red-programming-computer-mainframe-x2/

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OH-180 (AKA converted VT103-AA)

This system has 2 MDB boards completely populate with 2732 eproms, presumably
the software for the system.

Digital-B2-VT103-AA-Oh180-Video-Terminal-3-1a-Amp-120v-ac
https://www.ebay.com/itm/292818958162

the VT103-AA is the system ID for a VT100 + Qbus but no tape drive

There is a  custom board in addition to MDB and DEC boards.

Some information

M8186  KDF11 processor
M8059FC  64Kx18    DLV1J-UG    chip Fairchild MB8264-150 (x18)  MB8264-15
M7941  LSI-11_Systems_Service_Manual page 288
M8043
MDB MLSI - MRV11-C  #400 40360 (16 x 2732) (x2)
-----------------------------------------------
Custom FTM-R1
Ser No 170
Chips: MC6850
J1 40 pin to M7941
J3 to external DB9F

74LS14
CD4047AE
74LS123N
SN74LS00

National 75453
National S8863N
SN74LS244N
AB 314E221331 (termination) (x2)
National DM74LS374
----------------------------------------------

EBAY listing photos.

Photos as received and examined

M8059FC

MDB MLSI - MRV11-C  #400 40360

Position of switches on custom board

MC 6850 data sheet MC6850.pdf 
National 75453 driver  DS75452n.pdf

Custom Board FTM-R1

DEC 7941 Parallel board

Full Rear View

Card Cage

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