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ECA 33M50

EFA CORPORATION

ECA 33M50

Processor

80386DX/80486SX/80486DX

Processor Speed

16/20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo LED

J4

Speaker

J2

Turbo switch

J5

Reset switch

J3

External battery

J17

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

J16

open

 

Monitor type select color

J16

closed

Factory configured - do not alter

J21

open

 

BIOS type select 64K

J22

pins 2 & 3 closed

 

BIOS type select 128K

J22

pins 1 & 2 closed

SRAM CONFIGURATION

Size

Cache SRAM

Location

TAG (U22)

TAG (U24)

64KB

(8) 8K x 8

Banks 0 & 1

(1) 32K x 8

(1) 16K x 4

128KB

(4) 32K x 8

Bank 0

(1) 32K x 8

(1) 16K x 4

256KB

(8) 32K x 8

Banks 0 & 1

(1) 32K x 8

(1) 16K x 4

SRAM JUMPER CONFIGURATION

Size

J7

J8

J9

J10

J11

J12

J13

J14

J15

64KB

2 & 3

2 & 3

open

open

open

open

closed

1 & 2

open

128KB

1 & 2

2 & 3

open

closed

open

closed

closed

2 & 3

1 & 2

256KB

1 & 2

1 & 2

closed

closed

closed

closed

closed

1 & 2

2 & 3

Note:Pins designated should be in the closed position.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CPU TYPE CONFIGURATION

CPU

S1

switch 1

S1

switch 2

S1

switch 3

S1

switch 4

S2

switch 1-6

Jumper

J23

80486DX2

closed

closed

open

open

open

pins 1 & 2

ODP486SX

closed

closed

open

open

open

pins 2 & 3

80486DX

closed

closed

open

open

open

pins 1 & 2

80487SX-25

closed

closed

open

open

open

pins 2 & 3

80487SX-20

closed

closed

open

closed

open

pins 2 & 3

80486SX-25

open

open

closed

open

open

open

80486SX-20

open

open

closed

closed

open

open

80386DX

closed

closed

open

open

closed

N/A

CPU SPEED CONFIGURATION

CPU

iOSC

SPEED

S3

switch 1

S3

switch 2

S3

switch 3

S3

switch 4

S2

switchs 1-6

80486DX2-50

25MHz

closed

closed

open

closed

open

ODP486SX-66

33MHz

closed

open

closed

closed

open

ODP486SX-50

25MHz

closed

closed

open

closed

open

80486DX-50

50MHz

open

open

open

open

open

80486DX-33

33MHz

closed

open

closed

closed

open

80486DX-25

25MHz

closed

closed

open

closed

open

80487SX-25

25MHz

closed

closed

open

closed

open

80487SX-20

40MHz

open

open

closed

open

open

80486SX-25

25MHz

closed

closed

open

closed

open

80486SX-20

40MHz

open

open

closed

open

open

80386DX-40

80MHz

closed

open

open

open

closed

80386DX-33

66MHz

open

open

open

closed

closed

80386DX-20

20MHz

closed

closed

closed

open

closed

80386DX-16

16MHz

closed

closed

closed

closed

closed