...because we can't all be on the bleeding edge...





DIGITAL 21164

DIGITAL EQUIPMENT CORPORATION

DIGITAL 21164

Processor

Alpha

Processor Speed

266/300/333MHz

Chip Set

DEC

Video Chip Set

None

Maximum Onboard Memory

512MB

Maximum Video Memory

None

Cache

2048/4096/8192KB

BIOS

Unidentified

Dimensions

332mm x 307mm

I/O Options

64-bit PCI slots (2), 32-bit PCI slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), cache slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Chassis fan power

J2/pins 3 & 5

Serial port 1

J27

Chassis fan power

J2/pins 7 & 9

IDE interface

J28

Halt connector

J2/pins 8 & 10

Floppy drive interface

J31

Chassis fan power

J2/pins 11 & 13

Parallel port

J33

Reset switch

J2/pins 12 & 14

PS/2 mouse port

J34

IDE interface LED

J2/pins 15 & 17

64-bit PCI slots

PC1 & PC2

Keylock

J2/pins 18 & 20

32-bit PCI slots

PC3 & PC4

Speaker

J2/pins 19,21,23,25

Cache slot

SL1

Serial port 2

J26

Cache slot

SL2

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

J1/pins 9 & 10

N/A

SROM test disabled

J1/pins 23 & 24

Open

 

SROM test enabled

J1/pins 23 & 24

Closed

Loaded image select alternate images loaded

J1/pins 25 & 26

Closed

 

Loaded image select first image loaded

J1/pins 25 & 26

Open

Cache speed select nominal read speed

J1/pins 29 & 30

Open

 

Cache speed select read speed 1 cycle faster

J1/pins 29 & 30

Closed

Factory configured - do not alter

J1/pins 31 & 32

N/A

Factory configured - do not alter

J1/pins 33 & 34

N/A

Factory configured - do not alter

J1/pins 35 & 36

N/A

Factory configured - do not alter

J1/pins 37 & 38

N/A

Factory configured - do not alter

J1/pins 39 & 40

N/A

SROM test connector

J13

N/A

Flash BIOS write protect disabled

J14

Pins 2 & 3 closed

 

Flash BIOS write protect enabled

J14

Pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

32MB

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

64MB

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

128MB

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

256MB

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

512MB

(2) 16M x 36

(2) 16M x 36

(2) 16M x 36

(2) 16M x 36

CACHE CONFIGURATION

Size

SL1

SL2

2MB

2MB

None

4MB

4MB

None

8MB

4MB

4MB

Note: The sizes of the cache modules are unidentified.

CACHE JUMPER CONFIGURATION

Size

J1/pins 11 & 12

J1/pins 13 & 14

J1/pins 15 & 16

2MB

Closed

Open

Open

4MB

Open

Closed

Closed

8MB

Open

Closed

Open

CACHE ADDRESS CONFIGURATION

Size

J15

J16

J17

2MB

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

4MB

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

8MB

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

CACHE SPEED CONFIGURATION

Speed

J1/pins 17 & 18

J1/pins 19 & 20

J1/pins 21 & 22

 

6ns

Closed

Closed

Open

 

8ns

Closed

Open

Closed

10ns

Closed

Open

Open

 

12ns

Open

Closed

Closed

 

15ns

Open

Closed

Open

CPU DIVISOR SELECTION

Divisor

J1/pins 1 & 2

J1/pins 3 & 4

J1/pins 5 & 6

J1/pins 7 & 8

3

Closed

Closed

Open

Open

4

Closed

Open

Closed

Closed

5

Closed

Open

Closed

Open

6

Closed

Open

Open

Closed

7

Closed

Open

Open

Open

8 (266MHz)

Open

Closed

Closed

Closed

9 (300MHz)

Open

Closed

Closed

Open

10 (333MHz)

Open

Closed

Open

Closed

11

Open

Closed

Open

Open

12

Open

Open

Closed

Closed

13

Open

Open

Closed

Open

14

Open

Open

Open

Closed

15

Open

Open

Open

Open