These boards are out of my MDS system.  It was targeted as an ICE for the 8051 microcontroller.  The emulator POD plugs into one of the board sets below.

This page is organized to document the boards as they are installed in the Multibus cage from the bottom going up.


Bottom Board on Rack-

Floppy Disk Interface
Double Density
PWA 123857-002
S/N 023767

This board has a cable plugged into it's top edge connector.




Next Board Up

Floppy Disk Controller Channel
PWA 10000457-05
(may have copied down one extra 'zero' in above part number)

This board does not have a cable plugged into the 'top' edge connector. 
Edge connector shows 'weathering' from not having connector on it.




Next Board Up

Trace Board
PWA 162249-001
S/N 13904

J10 and J11 headers which are brought out to the Emulator Pod.




Next Board Up

Controller Board
PWA 162380-005 Rev M

This board has an 8080A Processor on it.
The Multibus P2 board edge is 'bridged' to Trace Board (above) on a two-slot interconnect board.
Has header on it brought out to Emulator pod and also power header to emulator pod.




 Open Slot, second from top.


Top Board

I.P.C. board
PWA 123192-003
S/N 084111

This board has an 8085 Processor and array of memory chips.
Also has two 8251 and two 8259 chips.
Board has row of buttons to generate interrupts that faces out to front of system.