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502 386DX

YOUTH KEEP ENTERPRISES, LTD.

502 386DX

Processor

80386DX

Processor Speed

33MHz

Chip Set

Unidentified

Max. Onboard DRAM

8MB

Cache

64/256KB

BIOS

Unidentified

Dimensions

355mm x 304mm

I/O Options

32-bit external memory card slot

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo LED

J5

Speaker

J2

External battery

J6

Turbo switch

J3

32-bit external memory card

S1

Reset switch

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP10

pins 1 & 2 closed

 

Monitor type select monochrome

JP10

pins 2 & 3 closed

NPU disabled

JP13

pins 2 & 3 closed

 

NPU enabled

JP13

pins 1 & 2 closed

NPU mode select asynchronous with CPU

JP14

pins 1 & 2 closed

 

NPU mode select synchronous with CPU

JP14

pins 2 & 3 closed

CPU speed select fast

JP15

pins 1 & 2 closed

 

CPU speed select slow

JP15

pins 2 & 3 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

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

DRAM JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

JP5

JP6

JP7

JP8

1MB

Closed

Closed

Closed

Closed

2 & 3

Open

Open

Open

2MB

Closed

Closed

Closed

Closed

2 & 3

2 & 3

Open

Open

4MB

Closed

Closed

Open

Open

1 & 2

Open

Open

Open

5MB

Closed

Open

Closed

Closed

2 & 3

1 & 2

Open

Open

8MB

Closed

Open

Open

Closed

1 & 2

1 & 2

Open

Open

Note:Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

TAG

64KB

(8) 64K x 1

(2) 64K x 1

256KB

(8) 256K x 1

(2) 256K x 1