Acer V70MA User manual

V70MA System Board
V70MA System Board 1
The V70MA is an all-in-one, high-performance system board that
supports the Intel Pentium processor with MMX (MultiMedia
eXtensions) technology. The MMX feature enables the system to
handle multimedia functions and enhance the performance of 32-bit
applications.
The system memory is upgradable to 256 MB via the onboard two
168-pin DIMM (Double In-line Memory Module) sockets. These
sockets accommodate 8-, 16-, 32-, 64- and 128-MB DIMMs. The
system board also comes with 512-KB second-level cache already
integrated in the CPU.
To fully support multimedia functions, the board incorporates a high-
performance 3-D video controller with AGP (Accelerated Graphics
Port) feature, 2- or 4-MB SGRAM (Synchronous Graphics Random
Access Memory), and a 3-D audio controller.
Onboard I/O (input/output) interfaces are comprised of two UART
(Universal Asynchronous Receiver-Transmitter) 16C550 serial
interfaces (one port and one connector), a parallel port with SPP
(Standard Parallel Port)/ECP (Extended Capabilities Port)/EPP
(Enhanced Parallel Port) support, and PS/2 keyboard and mouse
ports. Two USB (Universal Serial Bus) ports, one VGA (Video
Graphics Accelerator) port, one Feature connector, one Microphone-in
port, one Line-in port, one Line-out port, and one Game/MIDI (Musical
Instrument Digital Interface) port are also added to the board design to
enable the system to support additional peripherals.
For expansion, the board comes with two ISA (Industry Standard
Architecture) slots and one PCI (Peripheral Component Interface) slot.
Special features such as PnP (Plug-and-Play) support, Power
Management, Wireless Communication, Hardware Monitoring, Wake-
on Ring, and Wake-on LAN (Local Area Network) functions are also
supported. These functions are individually discussed in this chapter.

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The system is fully compatible with MS-DOS V6.X, OS/2, SCO UNIX,
Windows NT, and Windows 95/98 operating systems.
1 Major Components
The system board has the following major components:
•A Zero Insertion Force (ZIF) CPU socket that accommodates
Intel, AMD, or Cyrix/IBM Pentium CPU with MMX technology,
running at 233, 250, 266, 300, 333, or 350 MHz
•Two DIMM sockets that accept 8-, 16-, 32-, 64-, and 128-MB
Standard DRAMs, with Parity Check or Error Correction Code
(ECC) feature. These sockets allow memory upgrade of up to
256 MB
•512-KB second-level cache
•PCI local bus IDE (Integrated Device Electronics) controller
•3-D audio controller
•AGP-compliant 3-D video graphics accelerator with 2- or 4-MB
SGRAM
•One Feature connector
•One Wake-on LAN connector
•One Modem ring-in connector
•One CD-in connector
•One PCI audio upgrade connector
•One Voice Modem connector
•One IrDA (InfraRed Data Association) connector for Wireless
Communication support
•Two PCI enhanced IDE interfaces that support up to four IDE
devices
•External ports
•PS/2 keyboard and mouse ports

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•One buffered high-speed serial port
•One SPP/ECP/EPP high-speed parallel port
•Two USB ports
•One standard VGA port
•One Microphone-in port
•One Line-in port
•One Line-out port
•One Game/MIDI port
•Two ISA slots and one PCI slot (one PCI-/ISA-shared)

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2 System Board Layout
Figure 1 shows the locations of the major components on the system
board.
1 USB ports
2 PS/2 mouse/keyboard port
3 Parallel port
4 VGA port
5 COM2 port
6 Game/MIDI port
7 Line-out port
8 Line-in port
9 Microphone-in port
10 Second-level cache (pipeline-burst)
11 Fax/voice connector
12 CD-in connector
13 3-D audio controller
14 External CS4610 connector
15 Volume control connector
16 ISA slots
17 PCI slot
18 System BIOS chip
19 PCI-to-ISA bridge controller
20 CPU socket
21 Voltage controller with heatsink
22 IDE 1 connector
23 IDE 2 connector
24 FDD connector
25 Modem ring-in connector
26 Buzzer
27 Battery
28 Power button/ Reset/ Turbo/ HDD/
Power, Suspend LED/IrDA connector
29 Wake-up On LAN connector
30 ATX power connector
31 DIMM sockets
32 Video memory
33 PCI, AGP, memory controller
34 3-D AGP video controller
35 ATI AMC feature connector
36 Tag RAM
37 CPU fan connector
Figure 1 System Board Layout
1234 5 67 8 9
10 1112 13 14
16 1
7
18
19
20
35 3
4
3
3
32
31 302
9
28 2
7
2625 2
4
23 22
21
1
5
36
37

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3 Jumpers and Connectors
3.1 Jumper and Connector Locations
Figure 2 shows the jumper and connector locations on the system
board.
Figure 2 System Board Jumper and Connector Locations
The blackened pin of a jumper or a connector
represents pin 1.

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3.2 Jumper Settings
The following table lists the possible jumper settings:
Table 1 Jumper Settings
Jumper Setting Function
JP1 1-2 *
2-3
VGA Interrupt
Disabled
Enabled
JP2 1-2
2-3 *
Wake-on LAN
Active low
Active high
JP4 1-2, 4-5
2-3, 5-6 *
Audio Line-in Source
AMC connector
Line-in connector
JPX1 1-2
2-3 *
CPU Type
AMD K6S-300
Other CPUs
SW1 Settings
B1 On
Off *
Hardware Monitor
Enabled
Disabled
Bus Frequency (MHz)
CY2283-1
B2 B3 B4 CPU AGP PCI
Clk. Clk. Clk.
Off On Off 66 66 33
Off Off Off 75 60 30
On On Off 83 66 33
On
*Off *Off *100 66 33
ICS9148-16
B2 B3 B4 CPU AGP PCI
Clk. Clk. Clk.
Off On On 66 66 33
On On Off 75 60 30
Off On Off 83 66 33
Off Off Off 100 66 33
*Default setting

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Table 1 Jumper Settings (continued)
SW2 Settings
CPU Core Clock Multiplier CPU Type
B1 B2 B3 K6 M2 P55C
Off Off Off 3.5 3.5 3.5
On Off On 4.0 2.0 2.0
Off *On
*Off *3.0 *3.0 3.0
On On Off 2.5 2.5 2.5
On On On 4.5 -- --
On Off Off 2.0 -- --
Off On On 5.0 -- --
Off Off On 5.5 -- --
CPU Core Voltage
B4 B5 B6 B7 B8 Voltage
Off On On Off On 3.3
Off On On Off Off 3.2
Off On Off Off On 2.9
Off On Off Off Off 2.8
Off Off Off On On 2.3
Off *Off *Off *On *Off *2.2 *
SW3 Settings
AMD K6S-300 Voltage Select
B1 Voltage
On *3.45V
Off 3.6V
Password Checking
B2 Function
On Check password
Off *Bypass password
M1542 Bus Frequency
B3 B4 Frequency
Off Off 66
On *On *100
*Default setting

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3.3 Onboard Connector Functions
Table 2 lists the onboard connectors and their respective functions.
Table 2 System Board Connectors
Connector Function
CN1 USB port
CN2 Power LED (pins 1-3)
HDD LED (pins 4-7)
Reset button (pins 8-9)
Power button (pins 10, 20)
IrDA connector (pins 14-19)
Turbo LED (pins 11-13)
CN3 Upper: PS/2 mouse port
Lower: PS/2 keyboard port
CN4 ATX power connector
CN5 ATI AMC feature connector
CN6 Upper: Parallel port
Lower: VGA port (right)
COM2 port (left)
CN7 Wake-on LAN connector
CN8 COM1 port
CN9 Modem ring-in connector
CN10 IDE2 connector
CN11 IDE1 connector
CN12 Floppy disk drive connector
CN13 Upper: Game/MIDI port
Lower: (R-to-L)
Microphone-in port
Stereo line-in port
Stereo line-out port
CN14 Fax/voice connector
CN15 CD-in connector
CN16 Volume control connector
CN17 External CS4610 connector
FN1 2-pin CPU fan connector
FN2 5-pin CPU fan connector

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4 Installation Precautions
Before you install any system component, we recommend that you
read the following sections. These sections contain important ESD
precautions, pre- and post-installation instructions.
4.1 ESD Precautions
Electrostatic discharge (ESD) can damage your processor, disk drives,
expansion boards, and other components. Always observe the
following precautions before you install a system component:
1. Do not remove a component from its protective packaging until
you are ready to install it.
2. Wear a wrist grounding strap and attach it to a metal part of the
system unit before handling components. If a wrist strap is not
available, maintain contact with the system unit throughout any
procedure requiring ESD protection.
4.2 Pre-installation Instructions
Always observe the following before you install a system component:
1. Turn off the system power and all the peripherals connected to
the unit before opening it.
2. Open the system according to the instructions in the housing
installation manual.
3. Follow the ESD precautions in section 4.1 before handling a
system component.
4. Remove any expansion boards or peripherals that block access
to the DIMM sockets or CPU connector.
5. See the following sections for specific instructions on the
component you wish to install.

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Do not attempt the procedures described in
the following sections unless you are a
qualified service technician.
4.3 Post-installation Instructions
Observe the following after installing a system component:
1. See to it that the components are installed according to the step-
by-step instructions in their respective sections.
2. Make sure you have set all the required jumpers. See section 3.2
for the correct jumper settings.
3. Replace any expansion boards or peripherals that you removed
earlier.
4. Replace the system cover.
5. Connect the necessary cables and turn on the system.

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5 Memory Configurations
The system board comes with two 168-pin DIMM sockets that allow
you to expand memory to a maximum of 256 MB. The DIMM sockets
support SDRAMs (Synchronous Direct Random Access Memory) and
EDO (Extended Data Out) DRAMs with 8-, 16-, 32-, 64-, and 128-MB
capacities, 60 ns (nanoseconds) or less access time, and with ECC
feature.
Table 3 lists possible memory configurations.
Table 3 Memory Configurations
DIMM1 DIMM2 Total Memory
8 MB 8 MB
16 MB 16 MB
32 MB 32 MB
64 MB 64 MB
128 MB 128 MB
8 MB 8 MB
16 MB 16 MB
32 MB 32 MB
64 MB 64 MB
128 MB 128 MB
8 MB 16 MB 24 MB
16 MB 32 MB 48 MB
32 MB 64 MB 96 MB
64 MB 128 MB 192 MB
8 MB 8 MB 16 MB
16 MB 16 MB 32 MB
32 MB 32 MB 64 MB
64 MB 64 MB 128 MB
128 MB 128 MB 256 MB
5.1 Installing a DIMM
Follow these steps to install a DIMM:

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1. Open the clips on the socket.
2. Align the DIMM with the socket.
3. Press the DIMM into the socket until the clips lock into the DIMM.
Figure 3 Installing a DIMM
The DIMM socket is slotted to ensure proper
installation. If you insert a DIMM but it does
not fit easily into the socket, you may have
inserted it incorrectly. Turn the DIMM around
and try to insert it again.
5.2 Removing a DIMM
To remove a DIMM:
1. Press the holding clips on both sides of the socket outward to
release the DIMM.

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2. Gently pull the DIMM out of the socket.
Figure 4 Removing a DIMM
5.3 Reconfiguring the System
The system automatically detects the amount of memory installed.
Run Setup to view the new value for total system memory and make a
note of it.

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6 Second-level Cache
The board may come with either 256-KB or 512-KB pipelined-burst
second-level cache. Cacheless design is also supported. Refer to the
following table for the possible cache configurations.
Table 4 Second-level Cache Configurations
Cache
Size Data RAM (12 ns) Location Tag RAM (12 ns) (U22) Cacheabl e Memory
256 KB 32K x 32 x 2 pcs. U23, U26 32K x 8 x 1 pc
(external) 256 MB
256 KB 32K x 32 x 2 pcs. U23, U26 16 x 10 x 1 pc
(internal) 256 MB
512 KB 64K x 32 x 2 pcs. U23, U26 32K x 8 x 1 pc
(external) 128 MB
512 KB 64K x 32 x 2 pcs. U23, U26 16 x 10 x 1 pc
(internal) 256 MB
7 Upgrading the CPU
7.1 Removing the CPU
In case you want to replace or upgrade your CPU, you need to remove
the previously installed CPU first.
Follow these steps to remove the CPU:
1. Locate the CPU socket with CPU mounted on the system board.
2. Detach the fan cable connector.
3. Pull up the socket lever. The CPU pins will be automatically
released from the socket holes.
4. Detach the CPU from the socket.

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Figure 5 Removing the CPU
7.2 Installing the Upgrade CPU
Observe the ESD precautions when installing
components.
Before you proceed, make sure that there is no CPU installed in the
CPU socket.
Follow these steps to install the upgrade CPU:
1. Pull up the socket lever.
2. Insert the CPU, making sure that pin 1 (indicated by a notched
corner) of the CPU connects to hole 1 of the socket.
3. Pull down the socket lever to lock the CPU into the socket.

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Figure 6 Installing a CPU
4. Attach the heatsink and fan to the CPU.
Figure 7 Attaching the Heatsink and Fan to the CPU
notched corner
hole 1

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5. Plug the fan cable to the fan connector to its corresponding
connector on the system board. See Table 2 for the list of
onboard connectors and their functions.
8 IDE Hard Disk Sup port
The board comes with an enhanced PCI IDE controller that supports
PIO mode 4 and Ultra DMA (Direct Memory Access) mode data
transfers. In addition, two PCI IDE interfaces are mounted on the riser
card to enable the system to support a maximum of four IDE hard
disks, or any other IDE devices. See Figure 2 for the location of the
IDE interfaces.
Connect the cables according to the IDE hard disk configuration in
Table 5. Follow the instructions in the housing installation manual on
how to install a hard disk in the system.
Table 5 IDE Hard Disk Configuration
IDE Connector Master Slave
IDE 1 (CN11) Hard disk 0 Hard disk 1
IDE2 (CN10) Hard disk 2/ IDE
CD-ROM drive Hard disk 3

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9 Video Function
The onboard video controller is capable not only of enhancing video
display, but supporting 3-D video applications as well. The video
controller features the Accelerated Graphics Port (AGP) design - the
latest bus architecture that is considered to be the best solution for 3-D
applications. AGP offers greater bandwidth; thus, it is capable of
speeding up the VGA bus in order to meet the requirement of 3-D
applications.
The board may come with 2-MB upgradable to 4-MB video memory.
Larger video memory allows you to display higher resolutions and
more colors.
The following table lists the video resolutions supported by the
onboard VGA:
Table 6 Supported Video Resolutions
Resolution Refresh Rate
(Hz) Horizontal Freq. (KHz) Pixel Clock (MHz)
640 x 480 60 31.4 25.2
640 x 480 72 37.7 32.0
640 x 480 75 37.5 31.5
640 x 480 85 43.3 36.0
640 x 480 90 48.0 39.9
640 x 480 100 52.9 44.9
640 x 480 120 63.7 55.0
640 x 480 160 81.0 70.0
640 x 480 200 100.2 81.0
800 x 600 48 33.8 36.0
800 x 600 56 35.1 36.0
800 x 600 60 37.8 39.9
800 x 600 70 44.5 44.9
800 x 600 72 48.0 50.0
800 x 600 75 46.9 49.5
800 x 600 85 53.7 56.3
800 x 600 90 63.9 56.6
800 x 600 100 76.1 67.5
800 x 600 120 101.9 81.0

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Table 6 Supported Video Resolutions
Resolution Refresh Rate
(Hz) Horizontal Freq. (KHz) Pixel Clock (MHz)
800 x 600 60 37.8 135.0
1024 x 768 43 35.5 44.9
1024 x 768 60 48.4 65.0
1024 x 768 70 56.1 75.0
1024 x 768 72 57.9 75.0
1024 x 768 75 60.0 78.8
1024 x 768 85 68.7 94.5
1024 x 768 90 76.2 100.0
1024 x 768 100 80.4 110.0
1024 x 768 120 96.7 130.0
1024 x 768 140 113.1 157.5
1024 x 768 150 120.6 160.0
1152 x 864 43 45.9 65.0
1152 x 864 47 44.9 65.0
1152 x 864 60 54.9 80.0
1152 x 864 70 66.1 100.0
1152 x 864 75 75.1 110.0
1152 x 864 80 76.4 110.0
1152 x 864 85 77.1 121.5
1152 x 864 100 90.2 135.0
1152 x 864 120 108.6 172.0
1280 x 1024 43 50.0 80.0
1280 x 1024 47 50.0 80.0
1280 x 1024 60 64.0 110.0
1280 x 1024 70 74.6 126.0
1280 x 1024 74 77.9 135.0
1280 x 1024 75 80.0 135.0
1280 x 1024 85 91.2 157.5
1280 x 1024 90 96.4 160.0
1280 x 1024 100 106.4 172.0
1600 x 1200 52 68.0 135.0
1600 x 1200 58 75.0 135.0
1600 x 1200 60 76.2 156.0
1600 x 1200 66 82.7 172.0
1600 x 1200 72 89.7 194.4
1600 x 1200 75 93.8 202.5
1600 x 1200 76 95.2 198.0
1600 x 1200 85 106.2 229.5

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10 Audio Function
The board provides a complete 3-D audio solution via the onboard 3-D
video controller and the following audio interfaces:
•Microphone port
•Line-in port
•Line-out port
•Game/MIDI port
•CD-in connector
•Voice Modem connector
These connectors enable the system to accommodate external audio
devices. To connect an audio device, simply plug in the device’s
connector to its corresponding onboard audio port. See the following
figure:
Figure 8 Connecting External Audio Peripherals
Refer to Figure 1 or Figure 2 for the location of the audio connectors.
microphone
CD player (or synthesizer)
speakers
MIDI device