PB680 Motherboard Layout

Sockets
Jumpers
Connectors

PB680 Sockets

Location

Description
U1J2 P58AN-CD4052BCM National
U1J1 317MB-QF528 Motorola
U2J1 9559 C USA-MT4C1627ODJ -5
U3J1 9559 C USA-MT4C1627ODJ -5
U3J2 9559 C USA-MT4C1627ODJ -5
U4J1 9559 C USA-MT4C1627ODJ -5
U5J1 62A52RT-GD75232 TI
U9C1 P61SP-74F125 National
U8B1 FS95G2KBE4- PC87306-IBQ/VUL National
U9A1 EX28F002-BXT80 Intel
U8C1 74F08D-FWR4163-9609nN
U8B2 74ALS00AD-9609nE
U8A2 F2245-63k-CT9Y
U8A1 74F08D-FWR4163-9609nN
U7A2 74HCT14D-V8I25HME-crn9609
U7A4 F2245-63k-CT9Y
U7A1 64CNF3K-7407
U7A3 43IBC-XCOL
U6A2 TC4427-COA
U6A3 LM393A-5AT
U6A1 606-NDS-9410a
U5A1 606-NDS-9410a
U6C1 PCIset SB82371SB Intel
U5C1 PCIset SB82437VX Intel
U4D1 W24M257AJ-15 95271 Winbond
U3C1 Socket 7
U1B1 74ALS00AD-9609Ne
U1E1 ICS9169M 9612-03
U2E1 Sony CXK77V321Q-14 610AT7E S
U2F1 Sony CXK77V321Q-14 610AT7E S
U4E1 PCIset S82438VX
U4F1 PCIset S82438VX
U2G1 63CKNEK 7406
U2H1 Bt829KPF Video Decoder
U4H1 S3 Virge H1C3BB
 

PB680 Jumpers

Function

Location

Jumpers

Configuration

Host Bus SpeedJ1F2C1-2, 5-6 66MHz
(note: PCI clock speed 2-3, 4-560MHz
equals ½ Host bus speed) 2-3, 5-650MHz
CPU Clock RatioJ1F2D 1-2, 4-5x1.5
2-3, 4-5 x2.0
2-3, 5-6 x2.5
1-2, 5-6 x3.0
CMOS ClearJ1F2A4-5 Normal
5-6 Clear
Password ClearJ1F2A1-2 Password Enabled
2-3 Password Disabled
CMOS Setup AccessJ1F2B 1-2Enabled
2-3 Access Denied
Processor VoltageJ1F2B 4-5Standard Voltage (3.3v)
5-6 VRE
Recovery ModeJ9C11-2 Normal
2-3 Recovery
4-5, 5-6 Reserved
 

PB680 Connectors

Connector

Description

J9L1Serial Port
J7L1Parallel Port
J6L1PS/2™ Keyboard Connector
J5L1PS/2™ Mouse Connector
J3L1I2C Port and S-Video
J2L1RCA Connector
J1L1VGA Monitor Connector
J8E1Primary PCI IDE Connector
J9E1Secondary PCI IDE Connector
J8G1Floppy Connector
J1H1VESA Feature Connector
J9E2Primary Power Connector
J9G23.3v Power Connector
J6G1Riser Connector
J6F1SIMM Socket - Bank 0
J7F1SIMM Socket - Bank 0
J7F2SIMM Socket - Bank 1
J8F1SIMM Socket - Bank 1
J1L1Video Memory Connector
J4l2Video Memory Connector
J8K1CD Audio Reserved
J9J1Midi/Audio Reserved
J9N2Line-Out Package
J8N2Microphone-In Package
J9J2Wave-Table Reserved
J2A1Internal Speaker
 

VGA Video Port
A female DB15 connector built-in on the motherboard.
 

Parallel Port
A female DB25 connector built-in on the motherboard.
 

Serial Port
A male DB9 connector built-in on the motherboard.
 

PS/2 Mouse Port
A female 6-pin mini DIN connector built-in on the motherboard.
 

PS/2 Keyboard Port
A female 6-pin mini DIN connector built-in on the motherboard.
 

Riser Card Connector
This riser can accommodate the following expansion slots configuration:
 
4 X 4 Case: 2 ISA slots
1 PCI slot
1 Combo PCI/ISA slot
 
Mini Tower: 2 ISA slots
2 PCI slots
1 Combo PCI/ISA slot
 

Power Connector (PS1 / PS2)


 

Video Memory
These four chips make up the 2 MB video memory built-in on the motherboard.
 
See Also: Video Upgrade Information  

S3 Video Chipset
The S3 video controller is soldered onto the motherboard. If a new video card is installed, the new video card's display `overrides' the display of the onboard video. Device Manager, however, continues to list the onboard video as a display adapter. This is a limitation of Window 95.
 

Video Feature Connector
The connector is a male 2 x 17-pin VESA feature connector allowing video to be routed through a video capture card.
 

Floppy Drive Interface
The connector is a male 2 x 17-pin floppy drive connector. Capable of supporting up to 2.88 MB capacity floppy drive
 

Primary Hard Drive Interface
This male 2 x 20-pin connector is the primary IDE interface.
BIOS supports for:
Type F DMA and AT API Devices Logical Block Addressing (LBA) Enhanced CHS
Capable of supporting up to PIO Mode 4
 

Secondary Hard Drive Interface

 This male 2 x 20-pin connector is the secondary IDE interface.
BIOS supports for:
Type F DMA and AT API Devices Logical Block Addressing (LBA) Enhanced CHS
Capable of supporting up to PIO Mode 4
 

Battery
This 3V Lithium clip in battery is replaceable with a CR2032 battery
 
See Also: BATTERY UPGRADE INFORMATION
 

CPU Socket
This is the CPU socket 7, it can accomodate any of the following CPUs:
Intel Pentium 75 Mhz
Intel Pentium 90 Mhz
Intel Pentium 100 Mhz
Intel Pentium 120 Mhz
Intel Pentium 133 Mhz
Intel Pentium 150 Mhz
Intel Pentium 166 Mhz
Intel Pentium 200 Mhz
 
Not keyboard switchable. Disable cache to slow down system.
 
See Also: Processor Upgrade Information
 

SIMM Sockets

Socket Orientation

The socket closest to the Riser slot is J6F1, and to the right is J7F1. These two sockets make up the first bank (BANK 0). The next one over to the right is socket J7F2, and the right most socket is J8F1. These two sockets make up the second bank (BANK 1). This motherboard uses four vertical right key metal latch SIMM sockets.
 
See Also: Ram Upgrade Information
 

Flash Bios
This makes it possible for the BIOS to be upgraded via software rather than replacing the BIOS chip.
 
See Also: Bios Upgrade Information
 

Speaker
On-board piezo speaker.  

Jumper J1F2, Blocks A, B, C, D
 

Function

Jumpers

Configuration
CMOS Clear J1F2A 4-5 - Normal
5-6 - Clear
Password Clear J1F2A 1-2 - Password Enabled
2-3 - Password Disabled
CMOS Setup Access J1F2B 1-2 - Enabled
2-3 - Access Denied
Processor Voltage J1F2B 4-5 - Standard Voltage (3.3v)
5-6 VRE
Host Bus Speed,
(Note: PCI clock speed equals1/2 Host Bus Speed) 		J1F2C 1-2, 5-6 - 66 MHz
2-3, 4-5 - 60 MHz
2-3, 5-6 - 50 MHz
CPU Clock Ratio J1F2D 1-2, 4-5 - x1.5
2-3, 4-5 - x2.0
2-3, 5-6 - x2.5
1-2, 5-6 - x3.0
 

Jumper J9C1 BIOS Recovery
 

Connector J9D1 CPU Fan Power In


J9D1 is a 2-pin connector with the following pin designations.
 

Pin#

Signal
1. Negative
2. Positive
 
The power supply provided with these systems has a two prong connector designed for this connector. The connector is keyed so that the power cable can not be connected here improperly. The function of this connector is to receive 5 volts from the power supply for use by the CPU fan. The CPU fan connects to J1A1. J1A1 receives the 5 volts from the power cable connected to J9D1
 

Connector J1A1 CPU Fan Power Out
J1A1 is a 3-pin connector with the following pin designations
 

Pin#

Signal
1. Negative (Black)
2. Positive (Red)
3. No Connection
 
The CPU fan provided with these systems has a two prong plug.
 

Front Panel Connectors


The front panel connectors are keyed, they can only be installed in one direction.
 

RCA Connector For NTSC/Pal Video IN
Composite video input jack
 

I2C Port And S-Video IN
Connector Type - Female 7 pin mini-DIN
 

Pin#

Signal
1. a. Gnd
2. a. Gnd
3. y (luma)
4. c (chroma)
5. sck (i2c)
6. +12v
7. sda (i2c )
 

USB Connector (Universal Serial Bus)


Note: The USB connector is not installed on all PB680 systems.
 

Video Inputs
Inputs for Composite video and S-Video.
 

Cache
The PB680 Virge will have 256K Pipeline Burst L2 cache. Some Trio units will not have onboard cache.
 

PCI Chipset
Intel Triton 82430VX PCI chipset