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STEP 486

EVEREX SYSTEMS, INC.

STEP 486

Processor

80486SX

Processor Speed

25/33MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

32MB (on external memory card)

Maximum Video Memory

None

Cache

Unidentified

BIOS

Unidentified

Dimensions

355mm x 304mm

I/O Options

External memory card, parallel port, serial ports (2)

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port

CN1

Serial port 2

CN3

Serial port 1

CN2

External memory card

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

JP3

Open

Factory configured - do not alter

JP4

Pins 2 & 3 closed

Factory configured - do not alter

JP6

Open

Factory configured - do not alter

JP10

Open

Factory configured - do not alter

JP11

Open

Factory configured - do not alter

JP12

Open

CACHE CONFIGURATION

Note: The size of the cache is unidentified.

SERIAL PORT INTERRUPT SELECTION

IRQ

J2

J3

IRQ3

Pins 3 & 4 closed

Pins 3 & 4 closed

IRQ4

Pins 5 & 6 closed

Pins 5 & 6 closed

IRQ5

Pins 7 & 8 closed

Pins 7 & 8 closed

IRQ9

Pins 1 & 2 closed

Pins 1 & 2 closed

Note: Port 1 interrupts are set by one jumper and Port 2 interrupts are set by the other jumper. The correspondence between ports and jumpers is unidentified.

PARALLEL PORT INTERRUPT SELECTION

IRQ

J1

IRQ5

Pins 3 & 4 closed

IRQ7

Pins 5 & 6 closed

IRQ9

Pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

8MB

(4) 1M x 9

(4) 1M x 9

None

None

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

32MB

(4) 4M x 9

(4) 4M x 9

None

None