MANUAIS DE MOTHERBOARDS BIOTEQ

MB-8500TAX

JUMPERS SETTING

A: JP4 cache RAM size select

jumper no.

256KB

512KB

JP4

open

closed

cache RAM & cache module combination

SRAM
size
locate

cache RAM

cache
module

tag RAM

cacheable
main
memory (MB)

(U10,U11)

CSL1

U4

256KB

(32K x 32) x 2pcs

------

(8K x 8) x 1pcs

64

-----

256K x 1pcs

------

512KB

(32K x 32) x 2pcs

256K x 1pcs

(8K x 8) x 1pcs

64

(64K x 32) x 2pcs

------

(32K x 8) x 1pcs

-------

512K x 1pcs

------

B: JP12 CMOS function selection

Open : To mantain setup and extended setup data in CMOS for normal functioning. (default)

Closed : To clear CMOS setup memory, if there has been any inappropriate operation incurring the system
is failure.

Note : Please follow the procedure as below to clear BIOS password if your
password is lost or forgotten.

Power off -> JP12 closed -> power on -> after memory count finished power off -> JP12 open
-> power on -> reset your desired password.

CPU INSTALLATION JUMPER SETTING

A: JP1, JP2, JP13 CPU voltageLEVEL
and I/O voltage level selection

CPU type

JP1

JP2

JP13

remark

VI/O

Vcore

single volt CPU
INTEL tm
P54/CQS/CT
CYRIX
6x86 tm
AMD K5 tm
K5 PR xxx AB
K5 PR xxx AC
K5 PR xxx AF

open

open

open

3.5V

3.5V

closed

open

open

3.45V

3.45V

dual volt CPU
INTEL tm
P55C/CT
CYRIX
6x86L tm
AMD K5 tm
PR xxx AH
PR xxx AJ
PR xxx AK

open

open

open

3.5V

2.8V

open

closed

open

3.45V

2.8V

open

open

closed

3.5V

2.6V

open

closed

closed

3.45V

2.6V

JP6,JP7, JP8,JP9,JP10 CPU clock selection

a: INTEL CPU

CPU speed

bus clock
multiplier

JP6

JP7

JP8

JP9

JP10

75MHz

50MHz x 1.5

closed

closed

closed

open

open

90MHz

60MHz x 1.5

closed

closed

open

open

open

100MHz

66MHz x 1.5

closed

open

closed

open

open

120MHz

60MHz x 2

closed

closed

open

open

closed

133MHz

66MHz x 2

closed

open

closed

open

closed

150MHz

60MHz x 2.5

closed

closed

open

closed

closed

166MHz

66MHz x 2.5

closed

open

closed

closed

closed

180MHz

60MHz x 3

closed

closed

open

closed

open

200MHz

66MHz x 3

closed

open

closed

closed

open

* JP6 closed & JP7 & JP8 closed : bus clock =50MHz
* JP6 closed & JP7 & JP8 open : bus clock = 60MHz
* JP6 closed & JP7 open & JP8 closed : bus clock = 66MHz
* JP9 open & JP10 open : multiplier = 1.5
* JP9 open & JP10 closed : multiplier = 2
* JP9 closed & JP10 closed : multiplier = 2.5
* JP9 closed & JP10 open : multiplier = 3

b: CYRIX 6x86 tm CPU

CPU
speed

bus clock
multiplier

JP6

JP7

JP8

JP9

JP10

P-120+
100MHz

50MHz x 2

closed

closed

closed

open

closed

P-133+
110MHz

55MHz x 2

open

closed

closed

open

closed

P-150+
120MHz

60MHz x 2

closed

closed

open

open

closed

P-166+
133MHz

66MHz x 2

closed

open

closed

open

closed

* JP6 closed & JP7 closed & JP8 closed : bus clock = 50MHz
* JP6 open & JP7 closed & JP8 closed : bus clock = 55MHz
* JP6 closed & JP7 closed & JP8 open : bus clock = 60MHz
* JP6 closed & JP7 open & JP8 closed : bus clock = 66MHz
* JP9 open & JP10 closed : multiplier = 2

c: AMD-K5 tm CPU

CPU
speed

bus clock
multiplier

JP6

JP7

JP8

JP9

JP10

PR-75
75MHz

50MHz x 1.5

closed

closed

closed

open

open

PR-90
90MHz

60MHz x 1.5

closed

closed

open

open

open

PR-100
100MHz

66MHz x 1.5

closed

open

closed

open

open

PR-120
90MHz

60MHz x 1.5

closed

closed

open

open

open

PR-133
100MHz

66MHz x 1.5

closed

open

closed

open

open

PR-150
120MHz

60MHz x 2

closed

closed

open

open

closed

PR-166
133MHz

66MHz x 2

closed

open

closed

open

closed

* JP6 closed & JP7 closed & JP8 closed : bus clock = 50MHz
* JP6 closed & JP7 closed & JP8 open : bus clock = 60MHz
* JP6 closed & JP7 open & JP8 closed : bus clock = 66MHz
* JP9 open & JP10 open & multiplier = 1.5
* JP9 open & JP10 closed : multiplier = 2

CONNECTORS

A: J7

pin no.

assignment

function

1

speaker

speaker connector

2

NC

,,,, ,,,, ,,,, ,,,,

3

key

,,,, ,,,, ,,,, ,,,,

4

+5V VCC

,,,, ,,,, ,,,, ,,,,

5

reset control

reset

6

ground

,,,, ,,,, ,,,, ,,,,

7

NC

NC

8

power LED (+)

power LED

9

key

,,,, ,,,, ,,,, ,,,,

10

ground

,,,, ,,,, ,,,, ,,,,

11

NC

NC

12

HDD LED (+5V)

HDD LED

13

HDD LED (-)

,,,, ,,,, ,,,, ,,,,

14

key

,,,, ,,,, ,,,, ,,,,

15

HDD LED (+5V)

,,,, ,,,, ,,,, ,,,,

16

NC

NC

17

IRTX

IR

18

ground

,,,, ,,,, ,,,, ,,,,

19

IRRX

,,,,, ,,,, ,,,, ,,,,

20

key

,,,, ,,,, ,,,, ,,,,

21

+5V VCC

,,,, ,,,, ,,,, ,,,,

22

NC

NC

23

ground

green switch

24

green control

,,,, ,,,, ,,,, ,,,,

25

ground

power on

26

power on

,,,, ,,,, ,,,, ,,,,