EVEREX SYSTEMS, INC.

STEP 386 (REV. D)

Processor

80386DX

Processor Speed

16/20MHz

Chip Set

C & T

Max. Onboard DRAM

8MB

Cache

64/128KB

BIOS

AMI

Dimensions

355mm x 304mm

I/O Options

32-bit external memory card

NPU Options

80387DX

CONNECTIONS

Purpose

Location

32-bit external memory card

S1

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

Factory configured - do not alter

J1

Unknown

»

Factory configured - do not alter

J2

Unknown

»

Factory configured - do not alter

SW1

Unknown

»

NPU enabled

W3

Closed

 

NPU disabled

W3

Open

»

32-bit memory card enabled

W14

Closed

 

32-bit memory card disabled

W14

Open

»

Base memory select 640KB

W16

Closed

 

Base memory select 512KB

W16

Open

»

Bus speed select 10MHz

W17

Closed

 

Bus speed select 6.7MHz

W17

Open

SYSTEM DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

W1

W15

1MB

(4) 256K x 9

NONE

NONE

NONE

Closed

Closed

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

Closed

Closed

4MB

(4) 1M x 9

NONE

NONE

NONE

Open

Open

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

Closed

Closed

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

Open

Open

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

Open

Open

Note:Banks 2 & 3, and W1 are located on the external memory card.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

Dirty Bit (U38)

64KB

(8) 16K x 4

NONE

(2) 16K x 4

(1) 16K x 4

128KB

(8) 16K x 4

(8) 16K x 4

(2) 16K x 4

(1) 16K x 4

Note:Each Cache bank must be fully populated when its corresponding DRAM bank is populated.

RESISTOR SIPS CONFIGURATION

Settings

Memory Banks enabled

RP27, RP30, RP58, & RP61 installed

Bank 0

RP28, RP31, RP59, & RP62 installed

Bank 0 & 1

RP29, RP32, RP60, & RP63 installed

Banks 0, 1, 2, & 3

CACHE CONFIGURATION

Size

Bank 2

Bank 3

64KB

(8) 16K x 4

NONE

128KB

(8) 16K x 4

(8) 16K x 4

Note:Each Cache bank must be fully populated when its corresponding DRAM bank is populated.