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386/486 MARK III CONVERTIBLE

AMERICAN MEGATRENDS, INC.

386/486 MARK III CONVERTIBLE

Processor

80386DX (80486DX on MARK III adapter)

Processor Speed

25/33MHz

Chip Set

AMI

Max. Onboard DRAM

32MB

Cache

64KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot, CPU/NPU expansion card slot

NPU Options

80387 (3167/4167 on MARK III adapter)

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo switch

J8

Turbo LED

J5

Reset switch

J14

Speaker

J6

32-bit external memory card

P10

Power LED & keylock

J7

CPU/NPU expansion card

P13

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

 

DRAM address sequence select bank 0, then bank 1

J3

pins 1 & 2, 3 & 4 closed

 

DRAM address sequence select bank 1, then bank 0

J3

pins 2 & 3, 4 & 5 closed

CMOS memory normal operation

J4

Open

 

CMOS memory clear

J4

Closed

Factory configured - do not alter

SW1/switch 1

Off

 

Monitor type select color

SW1/switch 2

On

 

Monitor type select monochrome

SW1/switch 2

Off

 

Note : Cache is factory installed and is not configurable. The size of the cache & tag are unidentified.

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

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9