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PEM-2501/PEM-4001

DTK COMPUTER, INC.

PEM-2501/PEM-4001

Processor

80386DX

Processor Speed

25/33/40MHz

Chip Set

VLSI

Max. Onboard DRAM

16MB (8MB on external memory card)

Cache

64/256KB

BIOS

AMI/DTK

Dimensions

351mm x 306mm

I/O Options

32-bit external memory card slot (PEI-306)

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Speaker

J4

Turbo LED

J2

32-bit external memory card

S1

Reset switch

J3

Turbo switch

W6

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

NPU disabled

W1

Closed

 

NPU enabled

W1

Open

CPU speed select fast

W6

Open

 

CPU speed select slow

W6

pins 1 & 2 closed

 

CPU speed switchable from keyboard

W6

pins 2 & 3 closed

BIOS type select 27256

W7

pins 1 & 2 closed

 

BIOS type select 27512

W7

pins 2 & 3 closed

DMA speed select 8MHz

W8

Closed

 

DMA speed select 6MHz

W8

Open

Monitor type select monochrome

SW1/6

Off

 

Monitor type select color

SW1/6

On

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) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

DRAM JUMPER CONFIGURATION

Size

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

W2

W3

1MB

On

On

On

On

On

pins 2 & 3 closed

pins 2 & 3 closed

2MB

On

On

On

On

On

pins 2 & 3 closed

pins 2 & 3 closed

4MB

On

On

Off

On

Off

pins 1 & 2 closed

pins 1 & 2 closed

5MB

Off

On

Off

Off

On

pins 2 & 3 closed

pins 1 & 2 closed

8MB

Off

On

Off

Off

Off

pins 1 & 2 closed

pins 1 & 2 closed

12MB

Off

Off

On

N/A

N/A

N/A

N/A

16MB

Off

Off

Off

N/A

N/A

N/A

N/A

CACHE CONFIGURATION

Size

Bank 0

Tag

64KB

(8) 16K x 4

(2) 16K x 4

256KB

(8) 64K x 4

(2) 64K x 4

CACHE JUMPER CONFIGURATION

Size

W4

W5

64KB

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed