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J-5TXBR2

J-MARK COMPUTER CORPORATION

J-5TXBR2

Device Type

Mainboard

Processor

CX 6X86/IBM 6X86/CX 686MX/IBM 6X86MX/AM K5/AM K6/Pentium

Processor Speed

75/90/100/120/133/150/166/200/233/266/300MHz

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

256MB (EDO & SDRAM supported)

Maximum Video Memory

None

Cache

512KB

BIOS

Award

Dimensions

220mm x 220mm

I/O Options

32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connectors (2), ATX power connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

ATX power connector

ATX

USB connector 1

J17

IDE interface LED

C1

USB connector 2

J18

Green PC connector

C2

CPU fan power

J19

PS/2 mouse interface

J1

Soft off power supply

J20

Serial port 2

J6

Speaker

J22/pins 1 - 4

Serial port 1

J7

Reset switch

J22/pins 5 & 6

Floppy drive interface

J8

Turbo LED

J22/pins 7 & 8

IDE interface 1

J9

Power LED & keylock

J22/pins 9 - 13

Parallel port

J10

Turbo switch

J22/pins 14 - 16

IDE interface 2

J11

32-bit PCI slots

PC1 PC4

IR connector

J16

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Flash BIOS voltage select 12v

JP3

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP3

Pins 2 & 3 closed

CMOS memory normal operation

JP4

Pins 2 & 3 closed

 

CMOS memory clear

JP4

Pins 3 & 4 closed

SIMM CONFIGURATION

Size

Bank 0

8MB

(2) 1M x 36

16MB

(2) 2M x 36

32MB

(2) 4M x 36

64MB

(2) 8M x 36

128MB

(2) 16M x 36

256MB

(2) 32M x 36

Note: Board accepts EDO memory.

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

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.

CACHE CONFIGURATION

Size

Bank 0

TAG

512KB

(1) 64K x 64

(1) 32K x 32

CPU SPEED SELECTION (CX 6X86)

CPU speed

Clock speed

Multiplier

JP6

120MHz

50MHz

2x

Pins 17 & 18 closed

133MHz

55MHz

2x

Pins 19 & 20 closed

150MHz

60MHz

2x

Pins 21 & 22 closed

166MHz

66MHz

2x

Pins 23 & 24 closed

200MHz

75MHz

2x

Pins 25 & 26 closed

CPU SPEED SELECTION (IBM 6X86)

CPU speed

Clock speed

Multiplier

JP6

120MHz

50MHz

2x

Pins 17 & 18 closed

133MHz

55MHz

2x

Pins 19 & 20 closed

150MHz

60MHz

2x

Pins 21 & 22 closed

166MHz

66MHz

2x

Pins 23 & 24 closed

200MHz

75MHz

2x

Pins 25 & 26 closed

CPU SPEED SELECTION (CX 6X86MX)

CPU speed

Clock speed

Multiplier

JP6

166MHz

66MHz

2.5x

Pins 11 & 12 closed

200MHz

66MHz

2.5x

Pins 13 & 14 closed

200MHz

75MHz

2x

Pins 25 & 26 closed

233MHz

66MHz

3x

Pins 15 & 16 closed

CPU SPEED SELECTION (AM K5)

CPU speed

Clock speed

Multiplier

JP6

90MHz

60MHz

1.5x

Pins 3 & 4 closed

100MHz

66MHz

1.5x

Pins 5 & 6 closed

133MHz

66MHz

1.5x

Pins 5 & 6 closed

166MHz

66MHz

2.5x

Pins 13 & 14 closed

CPU SPEED SELECTION (AM K6)

CPU speed

Clock speed

Multiplier

JP6

166MHz

66MHz

2.5x

Pins 13 & 14 closed

200MHz

66MHz

3x

Pins 15 & 16 closed

266MHz

66MHz

4x

Pins 27 & 28 closed

300MHz

66MHz

4.5x

Pins 29 & 30 closed

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP6

75MHz

50MHz

1.5x

Pins 1 & 2 closed

90MHz

60MHz

1.5x

Pins 3 & 4 closed

100MHz

66MHz

1.5x

Pins 5 & 6 closed

120MHz

60MHz

2x

Pins 7 & 8 closed

133MHz

66MHz

2x

Pins 9 & 10 closed

150MHz

60MHz

2.5x

Pins 11 & 12 closed

166MHz

66MHz

2.5x

Pins 13 & 14 closed

200MHz

66MHz

3x

Pins 15 & 16 closed

CPU SPEED SELECTION (INTEL MMX)

CPU speed

Clock speed

Multiplier

JP6

166MHz

66MHz

2.5x

Pins 13 & 14 closed

200MHz

66MHz

3x

Pins 15 & 16 closed

233MHz

66MHz

3.5x

Pins 5 & 6 closed

CPU VOLTAGE SELECTION

Voltage

JP7/pins 1 & 2

JP7/pins 3 & 4

JP7/pins 5 & 6

JP7/pins 7 & 8

2.1v

Closed

Open

Open

Open

2.8v

Open

Open

Open

Closed

2.9v

Closed

Open

Open

Closed

3.1v

Open

Open

Closed

Closed

3.3v

Closed

Open

Closed

Closed

3.45v

Open

Closed

Closed

Closed

3.5v

Closed

Closed

Closed

Closed