DIGITAL EQUIPMENT CORPORATION

PERSONAL WORKSTATION 266I

Device Type

Mainboard

Processor

Pentium II

Processor Speed

233/266/300/333MHz

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

512MB (EDO supported)

Maximum Video Memory

None

Cache

128KB (located on Pentium II CPU)

BIOS

Unidentified

Dimensions

254mm x 218mm

I/O Options (CPU)

Parallel port, PS/2 mouse port, serial ports (2), USB connectors (2)

I/O Options (backplane)

IDE interfaces (2), floppy drive interface, 100Base-T connector, game/MIDI port, audio in – CD-ROM, fax/modem connector, 32-bit PCI slots (4)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port

CN1

USB connector 2

CN4

Serial port

CN2

PS/2 mouse port

CN5

USB connector 1

CN3

Parallel port

CN6

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Boot block update disabled

J27

Pins 1 & 2 closed

 

Boot block update enabled

J27

Pins 2 & 3 closed

»

Password disabled

SW1/5

Off

 

Password enabled

SW1/5

On

»

BIOS normal operation

SW1/6

Off

 

BIOS recovery mode

SW1/6

On

»

CMOS memory normal operation

SW1/7

Off

 

CMOS memory clear

SW1/7

On

SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

16MB

(2) 2M x 36

None

None

None

32MB

(2) 4M x 36

None

None

None

32MB

(2) 2M x 36

(2) 2M x 36

None

None

48MB

(2) 4M x 36

(2) 2M x 36

None

None

48MB

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

None

64MB

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

None

None

64MB

(2) 4M x 36

(2) 4M x 36

None

None

80MB

(2) 8M x 36

(2) 2M x 36

None

None

96MB

(2) 8M x 36

(2) 4M x 36

None

None

96MB

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

None

128MB

(2) 16M x 36

None

None

None

128MB

(2) 8M x 36

(2) 8M x 36

None

None

128MB

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

144MB

(2) 16M x 36

(2) 2M x 36

None

None

160MB

(2) 16M x 36

(2) 4M x 36

None

None

SIMM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

176MB

(2) 16M x 36

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

192MB

(2) 16M x 36

(2) 8M x 36

None

None

192MB

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

None

224MB

(2) 16M x 36

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

256MB

(2) 16M x 36

(2) 16M x 36

None

None

256MB

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

288MB

(2) 16M x 36

(2) 16M x 36

(2) 2M x 36

(2) 2M x 36

320MB

(2) 16M x 36

(2) 16M x 36

(2) 4M x 36

(2) 4M x 36

320MB

(2) 16M x 36

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

384MB

(2) 16M x 36

(2) 16M x 36

(2) 16M x 36

None

512MB

(2) 16M x 36

(2) 16M x 36

(2) 16M x 36

(2) 16M x 36

Note: Board accepts EDO memory.

CACHE CONFIGURATION

Note: 128KB cache is located on the Pentium II CPU.

CPU SPEED SELECTION

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/8

233MHz

66MHz

3.5x

On

Off

Off

On

On

266MHz

66MHz

4x

On

On

On

Off

On

300MHz

66MHz

4.5x

On

Off

On

Off

On

333MHz

66MHz

5x

On

On

Off

Off

On

CONNECTIONS

Purpose

Location

Purpose

Location

Main logic board connectors

CN1

Control panel connector

CN11

IDE interface 1

CN2

Audio in – CD-ROM

CN12

IDE interface 2

CN3

Fax/modem connector

CN13

Floppy drive interface

CN4

Audio connector

CN14

100Base-T connector

CN5

Power connector

P1

IDE interface LED

CN6

5v power

P2

10Base-T connector

CN7

3.3v power

P3

Chassis fan power

CN8

32-bit PCI slots

PC1 – PC2

Chassis fan power

CN9

32-bit PCI slots (full size)

SL1 & SL2

Game/MIDI port

CN10