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B730/B731/B733

FORCOM TECHNOLOGY CORPORATION

B730/B731/B733

   

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI

Dimensions

328mm x 227mm

I/O Options

None

NPU Options

4167

   

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Speaker

J5

Turbo LED

J3

Reset switch

J6

Power LED & Keylock

J4

Turbo switch

J7

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

J2

Open

 

Monitor type select color

J2

Closed

CPU speed select iOSC

J11

pins 2 & 3 closed

 

CPU speed select iOSC/2

J11

pins 1 & 2 closed

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

5MB

(4) 256K x 9

(4) 1M x 9

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

9MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

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

13MB

(4) 256K 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

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

NONE

28MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

NONE

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

52MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

Note:Banks 2 & 3 are optional SIMM sockets and must be added to the mainboard by the user.

CACHE CONFIGURATION

Size

Bank 0

Tag (U41)

Tag (U42)

64KB

(8) 8K x 8

(1) 16K x 4

(1) 8K x 8

256KB

(8) 32K x 8

(1) 16K x 4

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J13

J14

J15

64KB

Open

Open

Open

256KB

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

J9

J10

J16

80486SX

pins 2 & 3 closed

Open

Open

80487SX

pins 1 & 2 closed

Closed

pins 1 & 2 closed

80486DX

pins 1 & 2 closed

Closed

pins 2 & 3 closed