Flytech A68 V1.0a, A68 V1.0as (VP2), A68 V1.0as (VP3), A68 V1.1 User Manual

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USER’S MANUAL

A68 MAIN BOARD

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INDEX

This user’s manual describes the jumper setting of A68 Main Board. For
detailed technical information, please refer to CDs attached with PC system
unit.

Table of Contents Page

Technical details

1. Jumpers location diagram for A68 main board

1.1. A68 V1.0a main board 1

1.2. A68 V.1.0as & A68 V. 1.1 main board 2

1.3. A68 V1.X connector I/O pin-header
location diagram

2. Memory configuration 4

3. Jumper setting 5

3.1.A68 V1.0 jumper setting 6

3.2.A68 V1.0as & V1.1 jumper setting 7-9

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All other registered and unregistered trademarks are trademarks of their respective
holders

MU-A68-00

Printed in Taiwan 1999-7

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1. Jumpers Location Diagram

1.1. "A68 V1.0a " main board
(Supports VIA chipset VT 82C597 & CPU Clock Generator IC- works )

1

1.2. “A68 V1.0as” "A68 V1.1 " main board (Supports VIA

chipset VT82C597/ VT82C598 & CPU Clock Generator IC-S
clock generator )

J44

EISA SLOT

J24

EISA SLOT

J39 J38

J51

J52

VT82C597AT

31

J12
J13

VT82C598AT

J14

J21

J22

J5

J1

J6

J2

J7

J3

J40 J41

J55

J76
J75

VT82C586B

J64

U2

OR

1

2

4

43 3

J23

2

1 12

U1

CPU

J44

J73

J74

11

33

J17

J18

J19

J20

1

2

3

168-PIN DIMM RAM SOCKET-DIMM

168-PIN DIMM RAM SOCKET-DIMM

J11

1

J56

U3

19

J31 J33

J34

J69

J71

J8

J25

1

3

2

62

J70

51

1

2

1.3. Connector I/O pin-header Location Diagram for "A68

V1.X “ main board

J44

J24

J39

1

2

7
8

J16

EISA SLOT

EISA SLOT

J35

4 1 1 6

J29

1

J50

1 8

J53

1

2

J38

J54

2

8 1

J48

U2

VT82C597AT

OR

VT82C598AT

U1

CPU

J57

J77

U3

VT82C586B

1

J311J33

2

J37

26

J30

J40

J36

J15

1

2

J49

1

168-PIN DIMM RAM SOCKET-DIMM

1

4

1

J61
J5821

4

J46

1
2

1

1

2

2

168-PIN DIMM RAM SOCKET-DIMM

J68 J67

J41

4

J63

J34

J32

J43

2

1

3

2. Memory configuration for “A68 V1.X” main board
l System Memory Configuration

Capacity DIMM 1 DIMM 2
16MB
16MB
32MB
80MB
80MB
64MB
64MB
128MB

16MB none
none 16MB
16MB 16MB
16MB 64MB
64MB 16MB
64MB none
none 64MB
64MB 64MB

l External Cache RAM Configuration.

Capacity SRAM Type Quantity Location
256KB (default)
512KB (optional)

32K x 32 Pipeline 2 pcs. U4 , U5
64K x 32 Pipeline 2 pcs. U4 , U5

l VGA Memory Configuration.

Capacity U25 U26 U27 U28 Video DRAM Type
2MB (default)
4MB (optional)

ON ON OFF OFF 256KB X 32 SOP package
ON ON ON ON 256KB X 32 SOP package

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3. Jumper Setting

IMPORTANT

· A68 main board consists of three version : V1.0a, V1.0as and V1.1.

Following table described how to recognize the version and its differential.

The main board version can be identified according to the
printing on main board’s soldering side as version “1.0a”, “1.0as”
or “1.1”. The location of printing is closed to front panel side.
The label typed with “ IC-S” or “IC-W” is sticked on main board’ s

component’s side closed to core logic VT82C597 /VT82C598
for your clarification.

Main Board Type

Components
Core Logic (VIA)

Bus Speed of
Core Logic

CPU Clock
Generator

A68 V1.0a A68 V1.0as A68 V1.1

VT82C597 VT82C597 or

VT82C598

66MHz VT82C597 at

66MHz
VT82C598 at
100MHz

IC-Works IC-S IC-S

VT82C598

100MHz

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3.1. A68 V1.0a Jumper Setting (supports VIA VP3 VT82C597
chipset)

l CPU type selection : J1, J2, J3, J17, J18, J19, J22, J23

CPU J1 J2 J3 J17 J18 J19 J22 J23

Pentium 100MHz Open Open Open 2-3 2-3 2-3 / 1-2,3-4
Pentium 120MHz Open Close Open 2-3 2-3 1-2 / 1-2,3-4
Pentium 133MHz Open Close Open 2-3 2-3 2-3 / 1-2,3-4
Pentium 150MHz Close Close Open 2-3 2-3 1-2 / 1-2,3-4
Pentium 166MHz Close Close Open 2-3 2-3 2-3 / 1-2,3-4
IDT C6 180MHz Close Open Open 2-3 2-3 1-2 / 1-2,3-4
Pentium 200MHz MHz Close Open Open 2-3 2-3 2-3 / 1-2,3-4
Pentium MMX 166MHz Close Close Open 2-3 2-3 2-3 1-2,3-4 /
Pentium MMX 200MHz Close Open Open 2-3 2-3 2-3 1-2,3-4 /
Pentium MMX 233MHz
AMD K6/233MHz
(AFR)
AMD K6 266MHz(AFR)
AMD K6-2/266MHz

AMD K6-300MHz(AFR) Close Close Close 2-3 2-3 2-3 1-2,3-4 /

Open Open Open 2-3 2-3 2-3 1-2,3-4 /

Open Close Close 2-3 2-3 2-3 1-2,3-4

/

l CPU voltage selection : J21

CPU power J21 : Core

2.1V 1-2

2.2V 3-4

2.5V 1-2,5-6

2.8V 7-8

2.9V 1-2,7-8

3.2V 5-6,7-8

3.3V 1-2,5-6,7-8

3.52V 1-2,3-4,5-6,7-8

l SDRAM Clock synchronous :J20

Mode J20
AGP 1 – 2
CPU 2 - 3

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3.2 A68 main board V1.0as/V1.1 Jumper Setting (Supports VIA
VP3 VT82C597 chipset & CPU Clock Generator IC-S)

l CPU type selection : J1, J2, J3, J17, J18, J19, J22, J23

CPU J1 J2 J3 J17 J18 J19 J22 J23

Pentium 100MHz open open open 1-2 1-2 2-3 / 1-2,3-4
Pentium 120MHz open close open 1-2 1-2 1-2 / 1-2,3-4
Pentium 133MHz open close open 1-2 1-2 2-3 / 1-2,3-4
Pentium 150MHz close close open 1-2 1-2 1-2 / 1-2,3-4
Pentium 166MHz close close open 1-2 1-2 2-3 / 1-2,3-4
IDT C6 180MHz close open open 1-2 1-2 1-2 / 1-2,3-4
Pentium 200MHz close open open 1-2 1-2 2-3 / 1-2,3-4
Pentium MMX 166MHz close close open 1-2 1-2 2-3 1-2,3-4 /
Pentium MMX 200MHz close open open 1-2 1-2 2-3 1-2,3-4 /
Pentium MMX 233MHz
AMD K6/233MHz
(AFR)
AMD K6 266MHz (AFR)
AMD K6-2/266MHz
AMD K6/300 (AFR) close close close 1-2 1-2 2-3 1-2,3-4 /

open open open

open close Close 1-2

1-2

1-2 2-3 1-2,3-4 /

1-2 2-3 1-2,3-4 /

l CPU voltage selection : J21

CPU power J21 : Core

2.1V 1-2

2.2V 3-4

2.5V 1-2,5-6

2.8V 7-8

2.9V 1-2,7-8

3.2V 5-6,7-8

3.3V 1-2,5-6,7-8

3.52V 1-2,3-4,5-6,7-8

l SDRAM Clock synchronous :J20

Mode J20

AGP 1-2
CPU 2-3

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3.3. A68 main board V1.0as /V1.1 ( Supports VIA MVP3 VT82C598
Chipset & CPU Clock Generator IC-S)

l CPU type selection : J1, J2, J3, J17, J18, J19, J22, J23

CPU J1 J2 J3 J6 J7 J17 J18 J19 J22 J23

Pentium 100MHz open open open 2-3 2-3 1-2 1-2 2-3 / 1-2,3-4
Pentium 120MHz open close open 2-3 2-3 1-2 1-2 1-2 / 1-2,3-4
Pentium 133MHz open close open 2-3 2-3 1-2 1-2 2-3 / 1-2,3-4
Pentium 150MHz close close open 2-3 2-3 1-2 1-2 1-2 / 1-2,3-4
Pentium 166MHz close close open 2-3 2-3 1-2 1-2 2-3 / 1-2,3-4
IDT C6 180MHz close open open 2-3 2-3 1-2 1-2 1-2 / 1-2,3-4
Pentium 200MHz close open open 2-3 2-3 1-2 1-2 2-3 / 1-2,3-4
Pentium MMX
166MHz
Pentium MMX
200MHz
Pentium MMX
233MHz
AMD
K6/233MHz
(AFR)
AMD K6 266MHz
(AFR)
AMD K6­266MHz
**AMD K6-2/300
(AFR)
AMD K6­2/300MHz
**AMD K6­2/350MHz
AMD K6­3/350MHz
**AMD K6­2/400MHz
AMD K6­3/400MHz

close close open 2-3 2-3 1-2 1-2 2-3 1-2,3-4 /

close open open

open open open

open close

close close close 2-3 2-3 1-2 1-2 2-3 1-2,3-4

Close Open

close open

open close

close

Open

open

close

2-3 2-3 1-2

2-3 2-3 1-2

2-3 2-3 1-2

1-2 2-3 2-3

1-2 2-3 2-3

1-2 2-3 2-3

1-2

1-2

1-2

2-3

2-3

2-3

2-3 1-2,3-4

2-3 1-2,3-4

2-3 1-2,3-4

2-3 1-2,3-4

2-3 1-2,3-4

2-3 1-2,3-4

l SDRAM Clock synchronous :J5, J20

/

/

/

/

/

/

/

Mode J5 J20

AGP 1-2 1-2

8

CPU 2-3 2-3

Remark: If choose to run 100MHz CPU bus speed , please select jumper

Setting J5 2-3 / J20 2-3 and use PC 100 SDRAM speed under 8ns
synchronous.

l CPU voltage selection : J21

CPU power J21 : Core

2.1V 1-2

2.2V 3-4

2.5V 1-2,5-6

2.8V 7-8

2.9V 1-2,7-8

3.2V 5-6,7-8

3.3V 1-2,5-6,7-8

3.52V 1-2,3-4,5-6,7-8

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