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