FIRST INTERNATIONAL COMPUTER, INC.

486VC-H (REV. A1)

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

16/20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

VT

Max. Onboard DRAM

128MB

SRAM Cache

64/128/256KB

BIOS

Award

Dimensions

289.8mm x 218.4mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

J6

Speaker

J9

Turbo switch

J7

Power LED & keylock

J10

Reset switch

J8

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

J1

open

 

CMOS memory clear

J1

closed

»

Monitor type select monochrome

J2

open

 

Monitor type select color

J2

closed

»

CPU speed select OSC1/1

JK1 & JK2

pins 2 & 3 closed

 

CPU speed select OSC1/2

JK1 & JK2

pins 1 & 2 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

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 256K x 9

(4) 4M x 9

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

65MB

(4) 16M x 9

(4) 256K x 9

68MB

(4) 16M x 9

(4) 4M x 9

80MB

(4) 16M x 9

(4) 4M x 9

128MB

(4) 16M x 9

(4) 16M x 9

SRAM CONFIGURATION

Size

Cache SRAM

Location

TAG/Dirty Bit

JS1

JS2

64KB

(8) 8K x 8

Banks 0 & 1

(2) 8K x 8

pins 1 & 2

pins 1 & 2

128KB

(4) 32K x 8

Bank 0

(2) 8K x 8

pins 1 & 2

pins 2 & 3

256KB

(8) 32K x 8

Banks 0 & 1

(2) 32K x 8

pins 2 & 3

pins 2 & 3

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

CPU Type

JC1

JC2

JC3

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

80487SX

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

open