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MGX7520 (BABY AT)

DATAEXPERT CORPORATION

MGX7520 (BABY AT)

Device Type

Mainboard

Processor

Cyrix GXM

Processor Speed

Unidentified

Chip Set

Cyrix CX5520

Maximum Onboard Memory

256MB (SDRAM supported)

Video Chip Set

Cyrix (integrated)

Audio Chip Set

Cyrix (integrated)

Maximum Video Memory

Unidentified

Cache

None

BIOS

Award

Dimensions

220mm x 220mm

I/O Options

32-bit PCI slots (2), floppy drive interface, game interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), ATX power connector, MIDI/TV out connector, audio in - CD-ROMs (2), soft off power supply

CONNECTIONS

Purpose

Location

Purpose

Location

ATX-P connector

ATXP

Audio in - CD-ROM

J8

Parallel port

CN1

Audio in - CD-ROM

J9

Serial port 2

CN3

PS/2 mouse interface

JP5

Serial port 1

CN4

Power LED & keylock

JP7/pins 1 - 5

Floppy drive interface

CN5

Green PC LED

JP7/pins 8 & 9

IDE interface 2

CN6

Soft off power supply

JP7/pins 10 & 11

IDE interface 1

CN7

Reset switch

JP7/pins 12 & 24

Game interface

CN8

Speaker

JP7/pins 13 - 16

MIDI/TV out connector

CN9

IDE interface LED

JP7/pins 20 & 21

Chassis fan power

FAN

Green PC connector

JP7/pins 22 & 23

IR connector

IR1

32-bit PCI slots

PC1 – PC2

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Factory configured - do not alter

J1

Unidentified

»

CMOS memory normal operation

JP13

Pins 1 & 2 closed

 

CMOS memory clear

JP13

Pins 2 & 3 closed

»

Factory configured - do not alter

JP14

Unidentified

DIMM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(1) 1M x 64

None

16MB

(1) 2M x 64

None

16MB

(1) 1M x 64

(1) 1M x 64

24MB

(1) 2M x 64

(1) 1M x 64

32MB

(1) 4M x 64

None

32MB

(1) 2M x 64

(1) 2M x 64

40MB

(1) 4M x 64

(1) 1M x 64

48MB

(1) 4M x 64

(1) 2M x 64

64MB

(1) 8M x 64

None

64MB

(1) 4M x 64

(1) 4M x 64

72MB

(1) 8M x 64

(1) 1M x 64

80MB

(1) 8M x 64

(1) 2M x 64

96MB

(1) 8M x 64

(1) 4M x 64

DIMM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

128MB

(1) 16M x 64

None

128MB

(1) 8M x 64

(1) 8M x 64

136MB

(1) 16M x 64

(1) 1M x 64

144MB

(1) 16M x 64

(1) 2M x 64

160MB

(1) 16M x 64

(1) 4M x 64

192MB

(1) 16M x 64

(1) 8M x 64

256MB

(1) 16M x 64

(1) 16M x 64

Note: Board accepts SDRAM memory.

VIDEO MEMORY CONFIGURATION

Note: the size & location of the video memory is unidentified.

CPU INTERNAL CLOCK SPEED SELECTION

Speed

JP1

6x

Pins 1 & 3, 4 & 6 closed

7x

Pins 2 & 4, 3 & 5 closed

CPU SPEED SELECTION

Speed

JP4

30MHz

Pins 3 & 5, 4 & 6 closed

33MHz

Pins 1 & 3, 4 & 6 closed

CPU VOLTAGE SELECTION

Voltage

V core

JP2

3.3v

2.9v/3.6v

Pins 1 & 2, 4 & 5 closed

2.9v/3.6v

2.9v/3.6v

Pins 2 & 3, 5 & 6 closed