Tyan Computer Tyan S1598 J3 External Pin Assignments, FAN Pin Assignments, Memory Clock

1-D. J3 External Pin Assignments

HDD

LED

VCC

1

2

Po wer LED

Pwr/Slp

LEDs

Pin2

LED

3

4

Gro und

Pin1

Reset

Switch

Gro und

5

6

Po wer On /Off

Power

Switch

Pin18

Switch

7

8

Gro und

Pin17

VCC

9

10

Gro und

Infrared

Receive

11

12

K/B Lock

IRRX

13

14

Gro und

SMI

Switch

Gro und

15

16

SM I Switch

J3 Side View

IRTX

17

18

Gro und

1-E. FAN Pin Assignments

	1	2	3
FAN1, FAN2	GND	+12V	Fan Monitor

1-F. Memory Clock	Memory Clock	JP7
The memory clock can be set to run at the CPU
	CPU Clock	1-2
clock speed or to the AGP bus speed (normally
66MHz). The benefit of this setting is that you can	AGP Clock	2-3
run the CPU bus at 100MHz with only 66MHz
memory by setting the memory clock jumper to
	CMOS	JP13
AGP.
	Default	1-2
Hardware CMOS & Password Reset
	Reset CMOS	2-3

If you have been locked out of
your system because you forgot	JP1 - JP7
your password or set the CMOS
incorrectly, follow the instruc-
tions below.
1. Power off the system		FAN1
2. Set jumper JP13 to pins 2 and 3
3. Wait for 2 seconds, then return
jumper JP13 to pins 1 and 2.		JP8 - JP12
4. Power on the system again.
By following this procedure, you		FAN2,
will erase your password and
reset the CMOS to the BIOS		JP13
defaults.		J3, J4
S1598 Trinity ATX

INSTALL

15