...because we can't all be on the bleeding edge...





EM386X

MYLEX CORPORATION

EM386X

Processor

80386DX

Processor Speed

25/33MHz

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

16/32/64/128KB

BIOS

AMI/Award/Mylex/Phoenix

Dimensions

305mm x 330mm

I/O Options

32-bit Intel slots (2), 32-bit external memory card

NPU Options

80287/80387DX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

BAT

Power LED & keylock

J17

Turbo switch

J6

Reset switch

J18

Single-step control switch

J10

32-bit Intel slots

SL1 & SL2

Speaker connector

J14

32-bit external memory card

SL3

Turbo LED

J16

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

 

I/O bus speed select 1 wait states

J1

Closed

 

I/O bus speed select 2 wait states

J1

Open

»

Factory configured - do not alter

J2

Closed

»

Monitor type select monochrome

J3

pins 1 & 2 closed

 

Monitor type select color

J3

pins 2 & 3 closed

»

AT bus DRAM refresh signal disabled

J4

Closed

 

AT bus DRAM refresh signal enabled

J4

Open

»

80386 <Rev. D NPU interface bug bypass disabled

J5

Open

 

80386 <Rev. D NPU interface bug bypass enabled

J5

Closed

»

Turbo mode enabled

J6

Open

 

Turbo mode disabled

J6

Closed

»

Cache enabled

J9

Open

 

Cache disabled

J9

Closed

»

Factory configured - do not alter

J11

N/A

»

Factory configured - do not alter

J13

pins 1 & 2 closed

»

Factory configured - do not alter

J15

pins 1 & 2 closed

»

Factory configured - do not alter

J22

N/A

»

Factory configured - do not alter

J23

Closed

»

Factory configured - do not alter

J26

N/A

»

Factory configured - do not alter

J27

Closed

»

Memory access on Intel 32-bit bus cached

J28

Closed

 

Memory access on Intel 32-bit bus cached

J28

Open

»

ROM address select 0F0000 and FF0000

J30

Open

 

ROM address select 0F0000

J30

Closed

»

Factory configured - do not alter

J33

N/A

»

NPU type select 80387

J34

Closed

 

NPU type select 80287

J34

Open

»

NPU synchronous with CPU

J35

Open

 

NPU asynchronous with CPU

J35

Closed

»

Factory configured - do not alter

J37

pins 1 & 2 closed

»

Factory configured - do not alter

J38

N/A

»

80387 reset normal

J40

Open

 

80387 reset on port F1h

J40

Closed

USER CONFIGURABLE SETTINGS (CON’T)

Function

Jumper/Switch

Position

»

ROM caching disabled

J41

Open

 

ROM caching enabled

J41

Closed

»

Single step mode disabled

J42

pins 2 & 3 closed

 

Single step mode enabled

J42

pins 1 & 2 closed

»

Factory configured - do not alter

J43

N/A

»

BIOS speed select 250ns

J44

pins 3 & 4 closed

 

BIOS speed select 200ns

J44

pins 1 & 2 closed

 

BIOS speed select 200ns for 25MHz machine

J44

Open

 

BIOS speed select 150ns for 33MHz machine

J44

Open

»

Factory configured - do not alter

J46

N/A

»

Factory configured - do not alter

J47

N/A

»

Factory configured - do not alter

J48

N/A

»

Factory configured - do not alter

J49

N/A

»

Factory configured - do not alter

J50

N/A

»

Intel NPU not installed

SW0/1

On

 

Intel NPU installed

SW0/1

Off

»

No ISA bus card installed w/memory between 12 and 14MB

SW0/2

On

 

ISA bus card installed with memory between 12 and 14MB

SW0/2

Off

 

ROM shadowing disabled

SW0/8

On

 

ROM shadowing enabled

SW0/8

Off

»

Factory configured - do not alter

SW0/9

N/A

»

Factory configured - do not alter

SW0/10

N/A

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

16KB

(8) 4K x 4

NONE

(>1) 4K x 4

32KB 1

(8) 4K x 4

(8) 4K x 4

(>1) 16K x 4

32KB 2

(8) 8K x 4

NONE

(>1) 16K x 4

64KB

(8) 16K x 4

NONE

(>1) 16K x 4

128KB

(8) 16K x 4

(8) 16K x 4

(>1) 16K x 4

Note: The exact location and number of tag chips is unidentified.

CACHE JUMPER CONFIGURATION

Size

J7

J8

J12

J29

J31

16KB

pins 5 & 6 closed

pins 3 & 4 closed

pins 5 & 6 closed

Open

pins 1 & 2 closed

32KB 1

pins 5 & 6 closed

pins 5 & 6 closed

pins 5 & 6 closed

Closed

pins 5 & 6 closed

32KB 2

pins 5 & 6 closed

pins 5 & 6 closed

pins 5 & 6 closed

Open

pins 1 & 2 closed

64KB

pins 5 & 6 closed

pins 5 & 6 closed

pins 3 & 4 closed

Open

pins 1 & 2 closed

128KB

pins 3 & 4 closed

pins 5 & 6 closed

pins 3 & 4 closed

Closed

pins 3 & 4 closed

CACHE JUMPER CONFIGURATION (CON’T)

Size

J36

J39

J51

J52

16KB

pins 2 & 3 closed

pins 5 & 6 closed

pins 2 & 3 closed

pins 2 & 3 closed

32KB 1

pins 2 & 3 closed

pins 7 & 8 closed

pins 2 & 3 closed

pins 2 & 3 closed

32KB 2

pins 2 & 3 closed

pins 5 & 6 closed

pins 2 & 3 closed

pins 2 & 3 closed

64KB

pins 1 & 2 closed

pins 5 & 6 closed

pins 1 & 2 closed

pins 1 & 2 closed

128KB

pins 1 & 2 closed

pins 3 & 4 closed

pins 1 & 2 closed

pins 1 & 2 closed

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

DRAM SWITCH CONFIGURATION

Size

EMS Size

SW1/1

SW1/2

SW1/3

SW1/4

1MB

NONE

On

On

On

On

1MB

0.375MB

Off

On

On

On

2MB

1MB

On

On

Off

On

2MB

1.375MB

Off

On

Off

On

4MB

3MB

On

On

Off

Off

4MB

3.375MB

Off

On

Off

Off

8MB

7MB

Off

On

Off

Off

8MB

7.375MB

On

Off

On

On

16MB

13MB

On

Off

On

Off

16MB

14.875MB

On

Off

Off

On

32MB

30.875MB

On

Off

Off

Off

DRAM SPEED CONFIGURATION

CPU Speed

DRAM Speed

J25

SW0/5

SW0/6

SW0/7

25MHz

80ns

pins 1 & 2 closed

On

On

On

25MHz

100ns

pins 3 & 4 closed

Off

Off

Off

33MHz

60ns

pins 1 & 2 closed

On

On

On

33MHz

80ns

pins 3 & 4 closed

Off

Off

Off

BIOS TYPE CONFIGURATION

» Type

J21

J24

»

27256

pins 1 & 2 closed

pins 2 & 3 closed

»

27128

pins 1 & 2 closed

pins 1 & 2 closed

»

27512

pins 2 & 3 closed

pins 2 & 3 closed

CACHEABLE AREA SELECTION

Cacheable RAM

Min. cache size

SW0/2

SW0/3

SW0/4

32MB

128KB

N/A

Off

Off

16MB

64KB

N/A

On

Off

14MB

128KB

Off

Off

On

8MB

128KB

On

Off

On

4MB

N/A

N/A

On

On

DRAM/CACHE MODE CONFIGURATION

DRAM size

Interleave

Cache size

J19

J20

J1/M

J2/M

1MB

No

Any

Open

2 & 3

1 & 2

1 & 2

2MB

No

Any

3 & 4

Open

1 & 2

1 & 2

2MB

Yes

16KB

Open

1 & 2

1 & 2

3 & 4

2MB

Yes

32KB 1

1 & 2

Open

3 & 4

1 & 2

2MB

Yes

32KB 2

Open

1 & 2

1 & 2

3 & 4

2MB

Yes

64KB

Open

1 & 2

1 & 2

3 & 4

2MB

Yes

128KB

1 & 2

Open

3 & 4

1 & 2

4MB

No

Any

Open

2 & 3

1 & 2

1 & 2

8MB

No

Any

5 & 6

Open

1 & 2

1 & 2

8MB

Yes

16KB

Open

1 & 2

1 & 2

5 & 6

8MB

Yes

32KB 1

1 & 2

Open

5 & 6

1 & 2

8MB

Yes

32KB 2

Open

1 & 2

1 & 2

5 & 6

8MB

Yes

64KB

Open

1 & 2

1 & 2

5 & 6

8MB

Yes

128KB

1 & 2

Open

5 & 6

1 & 2

16MB

No

Any

Open

2 & 3

1 & 2

1 & 2

32MB

No

Any

7 & 8

Open

1 & 2

1 & 2

32MB

Yes

16KB

Open

1 & 2

1 & 2

7 & 8

32MB

Yes

32KB 1

1 & 2

Open

7 & 8

1 & 2

32MB

Yes

32KB 2

Open

1 & 2

1 & 2

7 & 8

32MB

Yes

64KB

Open

1 & 2

1 & 2

7 & 8

32MB

Yes

128KB

1 & 2

Open

7 & 8

1 & 2

Note: Pins designated should be in the closed position.