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NCR 8250

This NCR 8250 POS system was donated by Ames Department Stores in November of 2002.
 
From the labels it looks like the processor chassis is a model 2520-0090.
The Processor-1 board contains four Texas Instruments 74181 bit-slice ALU chips so this is a 16-bit processor.
 
The processor is at the top, a single casette drive in the middlem and a removable disk drive at the bottom.
 
The system label from the back of the processor chassis.
 
The processor chassis backplane.
 
The processor chassis boards.
From left to right:
Self Refreshing Memory Array
Self Refreshing Memory Array
Memory Interface
Empty
Processor 1
Processor 2
Processor 3
Processor 4
Empty
Clock
Empty
Casette-Data Interface Logic
Casette Transport Interface Logic
Int Disk Controller A
Int Disk Controller B
Int Disk Controller A
Int Disk Controller B
Multi-Chan Comm Adptr
Empty
GPITS Comm Adapter
Empty
GPITS Comm Adapter
Empty
Unknown Board
 
Self Refreshing Memory Array. There are two of these in the system.
 
Memory Interface.
 
Processor 1.
 
Processor 2.
 
Processor 3.
 
Processor 4.
 
Clock.
 
Casette-Data Interface Logic
 
Casette-Transport Interface Logic
 
Int Disk Controller A
 
Int Disk Controller B
 
Multi-Channel Communications Adapter
 
GPITS Communications Adapter
 
Unknown Board
 
 
 
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