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FASTBUS VLB

DIAMOND MULTIMEDIA SYSTEMS, INC.

FASTBUS VLB

Processor

80386DX/80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

C & T

Max. onboard DRAM

128MB

Cache

64/256KB

BIOS

C & T

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2)

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

BAT1

Reset switch

CN7

Parallel port

CN1

Speaker

CN8

Serial port (COM1)

CN2

Turbo switch

CN9

Serial port (COM2)

CN3

IDE interface LED

CN10

IDE interface

CN4

Power LED & keylock

CN11

Floppy drive interface

CN5

32-bit VESA local bus slot

S1

Turbo LED

CN6

32-bit VESA local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Onboard I/O controller enabled

J23

Closed

 

Onboard I/O controller disabled

J23

Open

CMOS memory normal operation

JCOM

pins 2 & 3 closed

 

CMOS memory clear

JCOM

pins 1 & 2 closed

Factory configured - do not alter

SW1/7

Off

Factory configured - do not alter

SW1/8

Off

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

16MB

(1) 4M x 36

NONE

NONE

NONE

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

(1) 8M x 36

NONE

NONE

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 8M x 36

NONE

NONE

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

S3

JTAG1

JTAG2

64KB

64KB module

Installed

Not installed

128KB

256KB module

Not installed

Installed

VESA CPU TYPE (ID0 & ID1) CONFIGURATION

CPU Type

SW1/switch 1 (ID0)

SW1/2 (ID1)

80386

On

Off

80486

Off

On

VESA WAIT STATE (ID2) CONFIGURATION

Wait states

CPU speed

SW1/3(ID2)

0 wait states

<=33MHz

Off

1 wait state

>33MHz

On

VESA BUS SPEED (ID3) CONFIGURATION

CPU speed

SW1/4 (ID3)

<=33MHz

Off

>33MHz

On

VESA ID4 CONFIGURATION

Setting

SW1/5 (ID4)

Reserved for future use

On

CPU TYPE CONFIGURATION

TYPE

JCALA

JNMI

JFERR

JIGN

JCLK

JCLK2

AMD386

pins 1 & 2

Open

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

80486SX

pins 2 & 3

Open

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 1 & 2

80487SX

pins 2 & 3

Closed

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

80486DX

pins 2 & 3

Closed

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

80486DX2

pins 2 & 3

Closed

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

Note:AMD386 is a CPU module available from the manufacturer

CPU SPEED CONFIGURATION

TYPE

Speed

SW2/6

AMD386

40MHz

On

80486SX

25MHz

On

80486SX

33MHz

Off

80487SX

25MHz

On

80487SX

33MHz

Off

80486DX

25MHz

On

80486DX

33MHz

Off

80486DX

50MHz

Off

80486DX2

50i MHz

On

80486DX2

66i MHz

Off