PB660 Motherboard Layout

NOTE:

J1K1: Video Port

A female DB15 connector built-in on the motherboard.

J3K1: Parallel Port

A female DB25 connector built-in on the motherboard.

{ewc MVBMP2, ViewerBmp2, !db25port.bmp}

J5K1: Serial Port 1

A male DB9 connector built-in on the motherboard.

J5K1: Serial Port 2

A male DB9 connector built-in on the motherboard.

J7K1: PS/2 Mouse Port

A female 6-pin mini DIN connector built-in on the motherboard.

J8K1: PS/2 Keyboard Port

A female 6-pin mini DIN connector built-in on the motherboard.

J6F2: 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

J9H2: Daughterboard Modem Connector

This area is blank. It is reserved for a 20-pin connector normally referred to as the JMOD connector.

J9E2: Power Connector (PS1 / PS2)

U3J1/U3J2: Video Memory

These four chips make up the 2 MB video memory built-in on the motherboard.

See Also: Video Upgrade Information U3H1: Cirrus Logic Video Chipset

The Cirrus Logic GD-5446 video controller is soldered onto the motherboard.

J1J1: Video Feature Connector

J13 is a male 2 x 13-pin VESA feature connector allowing video to be routed through a video capture card or a PBTV card.

J8G1: Floppy Drive Interface

J27 is a male 2 x 17-pin floppy drive connector.

Capable of supporting up to 2.88 MB capacity floppy drive

J9E1: 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)

Enhance CHS

Capable of supporting up to PIO Mode 4

J8E1: 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)

Enhance CHS

Capable of supporting up to PIO Mode 4

BT5G1: Battery

This 3V Lithium clip in battery is replaceable with a CR2032 battery

See Also: Battery Upgrade Information

U3B1: CPU Socket

Intel Pentium 75 MHz		Intel Pentium 133 MHz
Intel Pentium 90 MHz		Intel Pentium 150 MHz
Intel Pentium 100 Mhz		Intel Pentium 166 MHz
Intel Pentium 120 Mhz
Uses the 320-pin Type 5 Zero Insertion Force (ZIF) CPU socket.
Not keyboard switchable.
Disable cache to slow down system.
Only on systems with a Type 7 Socket

See Also: Processor Upgrade Information

RAM Memory Upgrade Socket

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 J7F3. 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

U9A1: 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

J1F1: CELP Socket

This motherboard may come configured with a CELP socket. This socket supports 256k COAST modules for upgrading the External Cache. If there is no CELP socket on-board

then the motherboard will be configured with 256k cache soldered on-board at locations

U2E1, U2E2, U3E1, U3E2, U2D1, U2D2, U3D1, U3D2.

See Also:

Cache Upgrade Information

J5K2: CMOS/Password Clear

J9C1: BIOS Recovery

J4K1: CMOS Setup/ISA Clock Speed Override

J6A2: Processor Voltage

J5J1: Host Bus Speed

J5J2: CPU Clock Ratio

U34: Tag RAM Socket

J8F1 Fan Speed Control Connector

Pin	Signal
1	FANNEG
2	FANPWR

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 J6A1. J6A1 receives the 5 volts from the power cable connected to J8F1

PB660 Motherboard Front Panel Connectors