EVEREX SYSTEMS, INC.

STEP 386/20/25/33 GATE ARRAY (EV-18108)

Processor

80386DX

Processor Speed

20/25/33MHz

Chip Set

C & T

Max. onboard DRAM

32MB

SRAM Cache

128/256KB

BIOS

AMI/MR

Dimensions

355mm x 304mm

I/O Options

32-bit external memory card, floppy drive interface,

IDE interface, parallel port, serial ports (2)

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port

CN1

LED connector

J1

Serial port 1

CN2

Speaker

J2

Serial port 2

CN3

IDE interface LED

J5

IDE interface

CN4

32-bit external memory card

S1

Floppy drive interface

CN5

Instep socket

U19

CACHE CONFIGURATION

Size

Max Cachable

Bank 0

Bank 1

128KB

16MB

(4) 32K x 8

NONE

256KB

32MB

(4) 32K x 8

(4) 32K x 8

CACHE JUMPER CONFIGURATION

Size

P1

128KB

Open

256KB

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 1M x 9

(4) 256K x 9

NONE

NONE

6MB

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

NONE

7MB

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

NONE

10MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

13MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

17MB

(4) 4M x 9

(4) 256K x 9

NONE

NONE

18MB

(4) 4M x 9

(4) 256K x 9

(4) 256K x 9

NONE

20MB

(4) 4M x 9

(4) 1M x 9

NONE

NONE

21MB

(4) 4M x 9

(4) 1M x 9

(4) 256K x 9

NONE

22MB

(4) 4M x 9

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

24MB

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

NONE

25MB

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

28MB

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

33MB

(4) 4M x 9

(4) 4M x 9

(4) 256K x 9

NONE

34MB

(4) 4M x 9

(4) 4M x 9

(4) 256K x 9

(4) 256K x 9

36MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

NONE

37MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

(4) 256K x 9

40MB

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

49MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 256K x 9

52MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

SERIAL PORT 1 CONFIGURATION

Port 1 (CN2)

J15/1 & 2

J15/3 & 4

J15/5 & 6

J15/7 & 8

»

IRQ4

Open

Open

Closed

Open

 

IRQ3

Open

Closed

Open

Open

 

IRQ5

Open

Open

Open

Closed

 

IRQ9

Closed

Open

Open

Open

SERIAL PORT CONFIGURATION

Port 1 (CN3)

J15/9 & 10

J15/11 & 12

J15/13 & 14

J15/15 & 16

»

IRQ3

Open

Closed

Open

Open

 

IRQ4

Open

Open

Closed

Open

 

IRQ5

Open

Open

Open

Closed

 

IRQ9

Closed

Open

Open

Open

PARALLEL PORT CONFIGURATION

LPT 2

J12/pins 1 & 2

J12/pins 3 & 4

J12/pins 5 & 6

»

IRQ7

Open

Open

Closed

 

IRQ5

Open

Closed

Open

 

IRQ9

Closed

Open

Open