Gigabyte GA-6VM7A+ User manual

FCCComplianceStatement:
This equipment has been tested and found to
comply with limits for a Class B digital device ,
pursuant to Part 15 of the FCC rules. These
limits are designed to provide reasonable
protection against harmful interference in
residential installations. This equipment
generates, uses, and can radiate radio
frequency energy, and if not installed and used
in accordance with the instructions, may cause
harmful interference to radio communications.
However, there is no guarantee that interference
will not occur in a particular installation. If this
equipment does cause interference to radio or
television equipment reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
-Reorient or relocate the receiving antenna
-Move the equipment away from the receiver
-Plug the equipment into an outlet on a circuit different from that to which
the receiver is connected
-Consult the dealer or an experienced radio/television technician for
additional suggestions
You are cautioned that any change or modifications to the equipment not
expressly approve by the party responsible for compliance could void Your
authority to operate such equipment.
This device complies with Part 15 of the FCC Rules. Operation is subjected to
the following two conditions 1) this device may not cause harmful interference
and 2) this device must accept any interference received, including interference
that may cause undesired operation.
DECLARATION OF CONFORMITY
Per FCC Part 2 Section 2. 1077(a)
Responsible Party Name: G.B.T. INC.
Address: 18305 Valley Blvd., Suite#A
LA Puent, CA 91744
Phone/Fax No: [phone]/ [phone]
hereby declares that the product
Product Name:
Model Number:
Mother Board
Conforms to the following specifications:
FCC Part 15, Subpart B, Section 15.107(a) and Section 15.109(a),
Class B Digital Device
Supplementary Information:
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful
and (2) this device must accept any inference received, including
that may cause undesired operation.
Representative Person's Name: ERIC LU
Signature:
Date: Feb. 11, 2000
EricLu
GA-6VM7A+

Declaration of Conformity
We, Manufacturer/Importer
(full address)
G.B.T. Technology Träding GMbH
Ausschlager Weg 41, 1F, 20537 Hamburg, Germany
declare that the product
( description of the apparatus, system, installation to which it refers)
Mother Board
GA-6VM7A+
is in conformity with
(reference to the specification under which conformity is declared)
in accordance with 89/336 EEC-EMC Directive
EN 55011 Limits and methods of measurement EN 61000-3-2* Disturbances in supply systems caused
of radio disturbance characteristics of EN60555-2 by household appliances and similar
industrial, scientific and medical (ISM electrical equipment “Harmonics”
high frequency equipment
EN55013 Limits and methods of measurement EN61000-3-3* Disturbances in supply systems caused
of radio disturbance characteristics of EN60555-3 by household appliances and similar
broadcast receivers and associated electrical equipment “Voltage fluctuations”
equipment
EN 55014 Limits and methods of measurement EN 50081-1 Generic emission standard Part 1:
of radio disturbance characteristics of Residual, commercial and light industry
household electrical appliances,
portable tools and similar electrical EN 50082-1 Generic immunity standard Part 1:
apparatus Residual, commercial and light industry
EN 55015 Limits and methods of measurement EN 55081-2 Generic emission standard Part 2:
of radio disturbance characteristics of Industrial environment
fluorescent lamps and luminaries
EN 55020 Immunity from radio interference of EN 55082-2 Generic immunity standard Part 2:
broadcast receivers and associated Industrial environment
equipment
EN 55022 Limits and methods of measurement ENV 55104 Immunity requirements for household
of radio disturbance characteristics of appliances tools and similar apparatus
information technology equipment
DIN VDE 0855 Cabled distribution systems; Equipment EN 50091- 2 EMC requirements for uninterruptible
part 10 for receiving and/or distribution from power systems (UPS)
part 12 sound and television signals
CE marking (EC conformity marking)
The manufacturer also declares the conformity of above mentioned product
with the actual required safety standards in accordance with LVD 73/23 EEC
EN 60065 Safety requirements for mains operated EN 60950 Safety for information technology equipment
electronic and related apparatus for including electrical business equipment
household and similar general use
EN 60335 Safety of household and similar EN 50091-1 General and Safety requirements for
electrical appliances uninterruptible power systems (UPS)
Manufacturer/Importer
Signature : Rex Lin
(Stamp) Date : Feb. 11, 2000 Name : Rex Lin

6VM7A+
Socket 370 Processor Motherboard
USER'S MANUAL
Socket 370 Processor Motherboard
REV. 1.0 First Edition
R-10-01-000131

How This Manual Is Organized
This manual is divided into the following sections:
1) Revision History Manual revision information
2) Item Checklist Product item list
3) Features Product information & specification
4) Hardware Setup Instructions on setting up the motherboard
5) Performance & Block Diagram Product performance & block diagram
6) BIOS Setup Instructions on setting up the BIOS
software
7) Appendix General reference

Table Of Content
Revision History P.1
Item Checklist P.2
Summary of Features P.3
6VM7A+ Motherboard Layout P.5
Page Index for CPU Speed Setup / Connectors / Panel and Jumper
Definition P.6
Performance List P.25
Block Diagram P.26
Memory Installation P.27
Page Index for BIOS Setup P.28
Appendix P.55

6VM7A+ Motherboard
1
Revision History
Revision Revision Note Date
1.0 Initial release of the 6VM7A+ motherboard user’s
manual. Jan.2000
The author assumes no responsibility for any errors or omissions that may appear in this
document nor does the author make a commitment to update the information contained herein.
Third-party brands and names are the property of their respective owners.
Jan. 31, 2000 Taipei, Taiwan, R.O.C

Item Checklist
2
Item Checklist
The 6VM7A+ motherboard
Cable for IDE / floppy device
Diskettes or CD (TUCD) for motherboard driver & utility
Internal COM B Cable (Optional)
Internal USB Cable (Optional)
Cable for SCSI device
6VM7A+ user’s manual

6VM7A+ Motherboard
3
Summary Of Features
Form Factor  24.3 cm x 21.0 cm microATX size form factor, 4 layers
PCB.
CPU  Socket 370 processor
 2nd cache in CPU(Depend on CPU)
Chipset  VT82C693A
 VT82C686A
Clock Generator  ICS 9248DF-39
 66/100/133 MHz system bus speeds (PCI 33MHz)
 75/83/112/124/140/150 MHz system bus speeds
(PCI 44MHz) (reserved)
Memory  2 168-pin DIMM sockets.
 Supports PC-100 / PC-133 SDRAM and VCM SDRAM
 Supports up to 1.0GB DRAM (Max)
 Supports only 3.3V SDRAM DIMM
 Supports 72bit ECC type DRAM integrity mode.
I/O Control  VT82C686A
Slots  1AGP slot supports 2X mode
 3 PCI slot supports 33MHz & PCI 2.2 compliant
 1AMR(Audio Modem Riser)slot
On-Board IDE  2 IDE bus master (DMA33/ATA66) IDE ports for up
to 4 ATAPI devices
 Supports PIO mode 3, 4 (UDMA33/ATA66) IDE &
ATAPI CD-ROM
On-Board
Peripherals
 1 floppy port supports 2 FDD with 360K, 720K,1.2M,
1.44M and 2.88M bytes
 1 parallel ports supports SPP/EPP/ECP mode
 2 serial ports (COMA& COM B)
 2 USB ports
Hardware Monitor  CPU/System fan revolution detect
 CPU /System temperature detect
 System voltage detect (Vcore,Vcc3,Vcc,+12V)
 CPU overheat shutdown detect
PS/2 Connector  PS/2Keyboard interface and PS/2Mouse interface
To be continued…

Summary of Features
4
BIOS  LicensedAward BIOS, 2M bit flash ROM
On-Board Sound  Creative CT5880
 Line In / Line Out / Mic In /AUX In / CD In / TEL/
SPDIF / Game port
Additional Features  Includes 3 fan power connectors.
 Poly fuse for keyboard over-current protection

6VM7A+ Motherboard
5
6VM7A+ Motherboard Layout
6VMA7+
DIMM1
DIMM2
PCI1
PCI2
PCI3
PGA 370
CPU
VT82C
686A
CT5880
VT82C
693A
GAME & AUDIO COMB COMA
LPT
PS/2
USB
BIOS
FLOPPY
A
TX POWER
IDE2
IDE1
JP16
J5
J8
J7
AMR
BAT1
JP2
BZ1
J4
AGP 1
JP15
SW2
JP23
JP1
J2
JP19
SW1
JP3

6VM7A+ Motherboard Layout
6

Page Index for CPU Speed Setup / Connectors / Panel and Jumper
Definition Page
CPU Speed Setup P.7
Connectors P.14
Game & Audio Port P.14
COM A / COM B / LPT Port P.14
USB Connector P.15
PS/2 Keyboard & PS/2 Mouse Connector P.15
JP16 (CPU Cooling Fan Power Connector) P.16
JP15 (Power Cooling Fan Power Connector) P.16
JP2 (System Cooling Fan Power Connector) P.17
ATX Power P.17
Floppy Port P.18
IDE 1(Primary)/ IDE 2(Secondary) Port P.18
J7 (TEL) P.19
J5 (AUX_IN) P.19
J8 (CD Audio Line In) P.20
J4 (SPDIF) P.20
Panel and Jumper Definition P.21
J2 (2x11 Pins Jumper) P.21
JP1 (Clear CMOS Function) P.22
JP3 (Onboard Sound Function Selection) P.22
JP23 (Case Open) P.23
JP19 (Support Cyrix CPU Selection)[Optional] P.23
BAT1(Battery) P.24

6VM7A+ Motherboard
7
CPU Speed Setup
The system bus speed is selectable at 66,100,133MHz and Auto. The user can select the
system bus speed (SW1) and change the DIP switch (SW2) selection to set up the CPU speed
for 300 - 733MHz processor.
Set System Bus Speed
SW1: O:ON,X : OFF
CPU (MHz) PCI(MHz) 1 2 3 4 5 6
Auto 33.3 X XXXOO
66 33.3 O OXXXX
75 37.5 O OOXXX
83 41.6 O OXOXX
100 33.3 O XXXXX
112 37.3 O XOXXX
124 31 X XXOXX
133 33.3 X XXXXX
140 35 X X O OX X
150 37.5 X XOX X X
The CPU speed must match with the frequency ratio. It will cause system hanging up if
the frequency ratio is higher than that of CPU.
SW2: DIP SWITCH
FREQ. RATIO 1 2 3 4
X 3 OXOO
X 3.5 XXOO
X 4 OOXO
X 4.5 XOXO
X 5 OXXO
X 5.5 XXXO
X 6 OOOX
X 6.5 XOOX
X 7 OXOX
X 7.5 XXOX
X 8 OOXX
X 8.5 XOXX
X 9 OXXX
X 9.5 XXXX

CPU Speed Setup
8


For Auto Jumper Setting:
SW1
ON
1 2 3 4 5 6


Note:
1. If you use 66/100/1333 MHz CPU, We recommend you to setup your system speed to
“Auto” value.
2. We don’t recommend you to set up your system speed to 75 , 83 , 112 , 124 , 140 ,150
MHz because these frequencies are not the standard specifications for CPU, Chipset
and most of the peripherals. Whether your system can run under
75 ,83 ,112 ,124 ,140 ,150 MHz properly will depend on your hardware configurations:
CPU, SDRAM, Cards, etc.
1. CeleronTM 300A/66MHzFSB
SW1
ON
1 2 3 4 5 6
SW2
ON
SW2
1 2 3 4

6VM7A+ Motherboard
9
2. CeleronTM 333/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
3. CeleronTM 366/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
4. CeleronTM 400/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
5. CeleronTM 433/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6

CPU Speed Setup
10
6. CeleronTM 466/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
7. CeleronTM 500/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
8. CeleronTM 533/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
9. CeleronTM 566/66MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6

6VM7A+ Motherboard
11
10. Cryix Joshua 300/100MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
11. Coppermine 500/100MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
12. Coppermine 550/100MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
13. Coppermine 600/100MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6

CPU Speed Setup
12
14. Coppermine 650/100MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
15. Coppermine 700/100MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
16. Coppermine 533/133MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
17. Coppermine 600/133 MHzFSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6

6VM7A+ Motherboard
13
18. Coppermine 667/133MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6
19. Coppermine 733/133MHz FSB
SW2
ON
1 2 3 4
SW1
ON
1 2 3 4 5 6