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STEP 386/20 REV.E (EV-1816A)

EVEREX SYSTEMS, INC.

STEP 386/20 REV.E (EV-1816A)

Processor

80386DX

Processor Speed

20MHz

Chip Set

C & T

Max. Onboard DRAM

8MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card

NPU Options

80387DX

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor select color

C/M

Closed

 

Monitor select monochrome

C/M

Open

NPU enabled

W3

Closed

 

NPU disabled

W3

Open

External memory card disabled

W14

Closed

 

External memory card enabled

W14

Open

Base memory select 512KB

W16

Closed

 

Base memory select 640KB

W16

Open

Bus speed select 6.7MHz

W17

Closed

 

Bus speed select 10MHz

W17

Open

External memory card parity checking disabled

W20

Closed

 

External memory card parity checking disabled

W20

Open

DRAM CONFIGURATION

Mainboard mem.

Total memory

Bank 0

Bank 1

Bank 2

Bank 3

1MB

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

2MB

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

4MB

(4) 1M x 9

NONE

NONE

NONE

8MB

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

8MB

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

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

DRAM JUMPER CONFIGURATION

Size

W1

W15

W21

PAL

1MB

Closed

Closed

Closed

ICX-1816A-107C

2MB

Closed

Closed

Open

ICX-1816-107A

4MB (256K x 9)

Closed

Closed

Closed

ICX-1816A-107C

4MB (1M x 9)

Open

Open

Open

ICX-1816-107A

8MB

Open

Open

Open

ICX-1816-107A

16MB

Open

Open

Open

ICX-1816-107A

CACHE CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

64KB

(8) 16K x 4

NONE

NONE

NONE

128KB

(8) 16K x 4

(8) 16K x 4

NONE

NONE

256KB

(8) 16K x 4

(8) 16K x 4

(8) 16K x 4

(8) 16K x 4

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