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





MARK IV AT Convertible Screamer

AMERICAN MEGATRENDS, INC.

MARK IV AT Convertible Screamer

Processor

80386DX/80486DX

Processor Speed

25/33/40MHz

Chip Set

C & T

Max. Onboard DRAM

64MB

Cache

64/256KB

BIOS

AMI

Dimensions

355mm x 289mm

I/O Options

32-bit external CPU/NPU card slot

NPU Options

80387/3167/4167 (on 32-bit external CPU/NPU card)

CONNECTIONS

Purpose

Location

Purpose

Location

32-bit external CPU/NPU card

CN1

Turbo LED

J6

External battery

J1

Power LED & keylock

J7

Speaker

J4

Diagnostic LED

J8

Reset switch

J5

Auxiliary keyboard

JX

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

J2

Open

Auxiliary BIOS disabled

J9

Open

 

Auxiliary BIOS enabled (27512 EPROM installed at U1)

J9

Closed

Factory configured - do not alter

SW1/1

Off

Monitor type select monochrome

SW1/2

Off

 

Monitor type select color

SW1/2

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

10MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

18MB

(4) 256K x 9

(4) 256K x 9

(4) 4M x 9

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

34MB

(4) 256K x 9

(4) 256K x 9

(4) 4M x 9

(4) 4M x 9

36MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

NONE

40MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

40MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

40MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

DRAM JUMPER CONFIGURATION

Size

J3

1MB

closed

2MB

closed

4MB

closed

4MB

open

6MB

closed

8MB

closed

DRAM JUMPER CONFIGURATION (CON'T)

Size

J3

8MB

open

10MB

closed

12MB

closed

12MB

Open

16MB

Closed

16MB

Open

16MB

Open

18MB

Closed

24MB

Closed

24MB

Open

32MB

Open

34MB

Closed

36MB

Open

40MB

Closed

40MB

Open

40MB

Open

48MB

Open

64MB

Open

Note:If jumper J3 is open, then PAL M00B2411 must be installed at U68 (factory default).

If jumper J3 is closed, then PAL M01B2411 must be installed at U68.

CACHE CONFIGURATION

Size

Bank 0

64KB

(8) 8K x 8

256KB

(8) 32K x 8