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MODEL 3386-XXXX PC 916

NCR CORPORATION

MODEL 3386-XXXX PC 916

Processor

80386

Processor Speed

20MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

2MB (on external memory card)

Maximum Video Memory

None

Cache

None

BIOS

Unidentified

Dimensions

Unidentified

I/O Options

External memory card, PS/2 mouse port

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

Speaker

J4

External battery

J2

Auxiliary keyboard connector

J5

Keylock

J3

   

Note: The location of CN1 is unidentified.

USER CONFIGURABLE SETTINGS

Function

Label

Position

Power good signal source select power supply

JP1

Open

 

Power good signal source select RC circuit

JP1

Closed

 

DMA speed select 8MHz

JP2

Closed

 

DMA speed select 4MHz

JP2

Open

Monitor type select color

SW1

On

 

Monitor type select monochrome

SW1

Off

NPU not installed (if Weitek NPU is installed, set switch to off)

SW2/1

Off

 

NPU installed

SW2/1

On

PS/2 mouse disabled

SW2/2

Off

 

PS/2 mouse enabled

SW2/2

On

Video ROM copied to RAM

SW2/3

Off

 

Video ROM not copied to RAM

SW2/3

On

Non maskable interrupt generated from fail safe timer disabled

SW2/4

Off

 

Non maskable interrupt generated from fail safe timer enabled

SW2/4

On

IRQ10 disabled

SW2/5

Off

 

IRQ10 enabled

SW2/5

On

IRQ11 disabled

SW2/6

Off

 

IRQ11 enabled

SW2/6

On

IRQ12 disabled

SW2/7

Off

 

IRQ12 enabled

SW2/7

On

Note: JP2 may not be present on all boards.

CPU SPEED SELECTION

Speed

SW2/8

8MHz (auto speed select)

Off

25MHz (high speed select)

On

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Wait state select 0 wait states

J1/JP1

Pins 1 & 2 closed

 

Wait state select 1 wait states

J1/JP1

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(36) 411000

None

2MB

(36) 411000

(36) 411000

Note: The location of banks 0 & 1 are unidentified.

DRAM JUMPER CONFIGURATION

Size

J2/JP2

1MB

Pins 2 & 3, 5 & 6, 8 & 9 closed

2MB

Pins 1 & 2, 4 & 5, 7 & 8 closed

DRAM SWITCH CONFIGURATION (ONE 2MB BOARD INSTALLED)

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

Set for first 2MB boundary

On

On

On

On

On

On

On

On

Setting

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW2/8

Locate 256KB at end of second MB of space.

On

Off

On

On

On

On

On

On

DRAM SWITCH CONFIGURATION (TWO 2MB BOARDS INSTALLED)

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

Set for first 2MB boundary (board 1)

On

On

On

On

On

On

On

On

Set for second 2MB boundary (board 2)

Off

On

On

On

On

On

On

Off

Setting

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW2/8

Locate 256KB at end of second MB of space. (board 1)

On

On

Off

On

On

On

On

On

Not the first MB in the system (board 2)

Off

Off

Off

Off

Off

Off

Off

Off

DRAM SWITCH CONFIGURATION (THREE 2MB BOARDS INSTALLED)

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

Set for first 2MB boundary (board 1)

On

On

On

On

On

On

On

On

Set for second 2MB boundary (board 2)

Off

On

On

On

On

On

On

Off

Set for third 2MB boundary (board 3)

On

Off

On

On

On

On

On

Off

Setting

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW2/8

Locate 256KB at end of sixth MB of space. (board 1)

On

Off

Off

On

On

On

On

On

All switches off (board 2)

Off

Off

Off

Off

Off

Off

Off

Off

All switches off (board 3)

Off

Off

Off

Off

Off

Off

Off

Off

DRAM SWITCH CONFIGURATION (FOUR 2MB BOARDS INSTALLED)

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

Set for first 2MB boundary (board 1)

On

On

On

On

On

On

On

On

Set for second 2MB boundary (board 2)

Off

On

On

On

On

On

On

Off

Set for third 2MB boundary (board 3)

On

Off

On

On

On

On

On

Off

Set for forth 2MB boundary (board 4)

Off

Off

On

On

On

On

On

Off

Setting

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW2/8

Locate 256KB at end of eighth MB of space. (board 1)

On

On

On

Off

On

On

On

On

All switches off (board 2)

Off

Off

Off

Off

Off

Off

Off

Off

All switches off (board 3)

Off

Off

Off

Off

Off

Off

Off

Off