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PB430/PB440/PB440T Motherboard Layout

Note

Some PB430/PB440 systems have been shipped with built-in game port (J4), however, the system BIOS does not support it. To disable the game port, remove the J15 jumper. The J15 jumper is located next to the game port.

U48 Upgrade Socket (DX, DX2, SX, SX2, ODP)

Uses 237 pin type 3 socket.

Zero Insertion Force (ZIF) socket. No special tools are

required to upgrade the CPU with an Intel Overdrive Processor.

J1 PS/2 Keyboard Port.

J1 is a female 6-pin mini DIN connector built-in on the motherboard.

J2 PS/2 Mouse Port.

J2 is a female 6-pin mini DIN connector built-in on the motherboard.

J3 VGA Port

J3 is a 15-pin DB15 port built-in on the motherboard.

J4 Game Port.

J5 Parallel Port.

J5 is a female DB25 parallel port built-in on the motherboard.

J6 Serial Port.

J6 is a male DB9 serial port built-in on the motherboard.

U15,U19,U24,U30,U35 Cache Upgrade Sockets.

32KB, 128KB or 256KB cache supported.

See Also Cache Upgrade Table or PB430/440

Cache Upgrade SIMM Sockets (BANK 1/BANK 2).

Use 72 pin SIMMs.

BANK 0 4 MB soldered RAM.

(Not on all systems.)

J12 (JVD) Color/Monochrome Select

Color Mode

Monochrome

Default J15 (JGAME) Game Port Enable/Disable

Default J16 (JI/O)

On-board I/O Controller Enable/Disable

Enabled

Disabled

Default J17 (JBOOT) BIOS Boot Block Select

Normal

Boot from Boot Block

Default J13 (JIRQ5/7) LPT1 IRQ Select

IRQ7

IRQ5

Default J11 (JVGAS) VGA Enable/Disable

Built in VGA Enabled

Built in VGA Disabled

Default J30,31,32,33 (JCACH) CACHE Size Selection

Note

J30,31,32, 33 are ignored if no external cache is installed.

Default

See Also PB430 Cache Upgrade J28 (JBT)

External Battery Connector

See Also PB430/440 Miscellaneous Upgrade J24 (JB8S)

On-Board Battery Enable/Disable

Enabled

Disabled

Default

See Also PB430/440 Miscellaneous Upgrade J36

Front Panel Connector

J37 (JKLK) Keylock Connector

J38 (JSPK) External Speaker Connector

J39 (JSPKS) On-Board Speaker

Enabled

Disabled

Default J35 (JFAN) External Fan Connector

BZ1 Internal Buzzer

Internal Piezoelectric Buzzer (soldered).

BT1 Internal Battery

Internal 3.6V DC NiCad battery (soldered). See Also Pb430/440 Miscellaneous Upgrade

J10 (JVESA) VGA Feature Connector 2 x 13 Pin Header

J19 (JFDC) Floppy Drive Connector

2 x 17 Pin Header.

J18 (JHDD) Hard Drive (IDE) Connector

2 x 20 Pin Header.

J21 (JMOD) Proprietary Modem Connector

2 x 10 Pin Header.

PB430/440 3x3 Case Riser Card

3 x 16-bit ISA Slots

PB440 4x4 Case Riser Card

4 x 16-bit ISA Slots

PB440T Minitower Case Riser Card

5 x 16-bit ISA Slots

U10 CL-5424 or CL-5428

Cirrus Logic 5424 or 5428 VGA Controller.

U22 256K x 16 Surface mount

Video Memory (First 512K).

U34 256K x 16

Video Memory (Second 512K).

Not on all systems (PB430/440 with CL-5428 Video Chip only).

U50 486SX/DX

Main Processor (soldered if included).

U14 ACC3221

Super Multi I/O.

U51 ACC2168

System Chipset Controller.

U1 8242

Keyboard Controller.

U23 BIOS

128 KB Phoenix BIOS

Phoenix 1.01.06E, 1.01.07E, 1.01.11E (Latest).

J34, J40 CPU Type (Motherboard Revision C)

J22 (JIRQ9) Video IRQ9 Enable

Disabled

Enabled

Default

J41 (Jobmd) On-board Memory Disable

Default

Enabled

Disabled

J14 (Jpwdclr) Password Clear

Normal Operation

Clear Password

Default

J27 (JMRQ) Mouse Port

Enabled

Disabled

Default

J23,25,26 (JSEL) CPU Speed Select

Also See Pb430/440 Cpu Upgrade.

U25,26 Zip Video Memory Sockets

The PB430 with a CL-5428 chip is upgradeable to 2 MB of video memory by adding two 256kx16 fast page mode (symmetrical, CAS line) DRAM ZIPS.

The PB430 with a CL-5424 chip is upgradeable to 1 MB of video memory by adding only one suchDRAM ZIP at location U26.