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486VC-H (REV. A1)

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