i found this can anybody determine if i can use a cdrom on this setup?
Packard Bell 486 User Manual
For SX, SX2, DX AND DX2 systems.
Appendix D : Connectors and Jumpers
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Introduction
Power Supply Connectors
Motherboard Connecters and Jumpers
Jumpers for Packard Bell 486 Computer
Motherboard Layout for Packard Bell 486 Computer
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Introduction
Your system's motherboard (main circuit board) contains several connectors and jumpers which can be selected or set differently to give your computer more flexibility. These settings have been set to the factory default which most often gives the best performance. You should not alter these settings unless you have had previous experience with this type of equipment.
Electro-Static Discharge (ESD) Before installing or touching any exposed printed circuit boards, computer parts, chips, etc., make sure that you are properly grounded. This is extremely important, as most internal computer components are highly susceptible to damage from Electro-Static Discharge (ESD).
Service technicians ground themselves by wearing an wrist strap (available at electronics supply stores) which is connected to an electrical ground (such as your system's Serial Port A). If you do not have a wrist strap, you can ground yourself and dissipate any electro-static build-up by doing the following:
1.Connect the computer's power cord between the computer and a three-pronged
(grounded) electrical outlet.
2.Power to the computer must be turned OFF.
3.Touch, and maintain continuous contact with, an exposed metal surface of
the computer system (such as the disk drive mounting tray, the metal
surrounding the power supply or the unpainted portions of the computer's
rear panel) while handling or touching any internal components, chips,
add-on boards or disk drives.
Before you begin, make a note of what the original settings are. This way, you can always revert to the original settings if the new settings do not work.
P/S : I did my best to create this diagram, hope it is clear enough!
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Power Supply Connectors
The PS1 and PS2 connectors of the switching power supply should be connected to the (J7) and (J13) connectors on the motherboard. The pin configuration is:
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Motherboard Connectors and Jumpers
Model 3x3 Series and Model 4x4 Series systems feature four connectors from the switching power supply: PA, PB, PC and PD. These have pin configurations and carry voltages which are identical. Each of them may be connected to a hard disk or floppy disk drive. PA, PB and PC are for 3.5 inch hard disk and 5.25 inch disk drives; PD is for a 3.5 inch floppy disk drive. The pin configuration is:
Make sure the connection between the switching power supply and the motherboard is correct. Improper connection will damage the motherboard.
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Jumpers for Packard Bell 486 Computer
(J1) PS/2 Type Keyboard Port
J1 is a female 6-pin mini DIN connector built-in on the motherboard.
It is only available for use with the PS/2 Type keyboard.
(J2) PS/2 Type Mouse Port
J2 is a female 6-pin mini DIN connector built-in on the motherboard.
It is only available for use with a PS/2 Type mouse.
(J3) Extended VGA (Video) Port
J3 is a 15-pin DB15 video port built into the motherboard.
(J4) RESERVED
(J5) Bi-directional Parallel Port
J5 is a female DB25 bi-directional parallel port built-in on the motherboard.
(J6) Serial (COM) Port 1
J6 is a male DB9 serial port built-in on the motherboard.
(J7), (J13) Power Connector 1 & 2
(J8) Primary Monitor Select
(J9) Video IRQ9 Enable
J9 is a 2-pin jumper that enables or disables the IRQ9 interrupt.
(J10) RESERVED
(J11) RESERVED
(J12)/(J27) ISA Riser Card/VL Bus Riser Connector
Model 3x3 Series systems: The Riser Card inserted in (J12) and (J27) features (3) ISA (AT-compatible) 16-bit connectors. An optional PCI Riser Card features (1) ISA (AT-compatible) 16-bit connector, 1 PCI connector and (1) combined slot w/ ISA & PCI connectors.
Model 4x4 Series systems: The Riser Card inserted in (J12) and (J27) eatures (4) ISA (AT-compatible) 16-bit connectors. An optional PCI Riser Card features (2) ISA (AT-compatible) 16-bit connectors, 1 PCI connector and (1) combined slot w/ ISA & PCI connectors.
(J14) VESA Feature Connector
J14 is a 26-pin connector built-in on the motherboard, which can accommodate
either an 8514/A Type or Multimedia card.
(J15) ECP DMA Channel Select 1
J15 is a 3-pin header connector that enables the DMA Channel, together with
J16. Be sure to set both (J15) and (J16) for the same setting.
(J16) ECP DMA Channel Select 2
J16 is a 3-pin header connector that enables the DMA Channel, together with
J15. Be sure to set both (J15) and (J16) for the same setting.
(J17) Boot Select
(J18) Parity Enable
When J18 is enabled, parity will be generated to the system's DRAM.
(J19) Onboard VGA Video Controller Enable
This setting selects either the built-in VGA or PCI adapter card interface,
or a separate ISA VGA card.
(J20) I/O Controller Disable
This setting enables or disables your system's IDE controller, floppy drive
controller, serial port(s) and parallel port.
(J21) Floppy Drive Connector
The floppy disk drive (FDD) is connected to the motherboard by connecting a
34-pin daisy-chained cable to J21. (All odd pins are grounded, except Pin 5
- Key.)
(J22) Modem or Second Serial Port Connector
J22 is a 20-pin connector which is connected to the Modem card or Second
Serial Port. (Modems are only included with certain systems). The Modem Card
is mounted on the motherboard. The Modem or Second Serial Port can be set as
COM1, COM2, COM3 or COM4, via the Advanced Setup Utility described in Chapter
3. The default setting should be COM1, unless your system does not include
a modem or second serial port. In this case, the connector should be disabled
in the Setup Utility.
(J23) Super I/O IDE Connector 1
Two hard disk drives (HDDs) can be connected to the motherboard by using a
40-pin daisy-chained cable connected to J23. IDE means Integrated Drive
Electronics.
Your system can boot up from the (primary) Local Bus IDE Connector 0, located
at (J24) on your motherboard, rather than the (secondary) IDE Connector 1,
located at (J23). When adding a hard disk drive to your system, be sure to
connect your primary master (C:\) drive to (J24).
(J24) Local Bus IDE Connector 0
Two hard disk drives (HDDs) can be connected
to the motherboard by using a 40-pin daisy-chained cable connected to J24.
IDE means Integrated Drive Electronics.
Your system can boot up from the (primary) Local Bus IDE Connector 0,
located at (J24) on your motherboard, rather than the (secondary) IDE
Connector 1, located at (J23). When adding a hard disk drive to your system,
but sure to connect your primary master (C:\) drive to (J24).
(J25) CPU Speed Select
This 3-pin header connector selects the CPU Clock Speed.
(J26) Cache Size Select
J26 selects the external cache size. (Note: If no external cache is
installed, thIs jumper may be set randomly.)
(J27) VL Bus Riser Connector
(J28) Pentium OverDrive/SL Enhanced Reset
J28 is a 3-pin header connector that selects either a Pentium OverDrive for
DX2 or SL Enhanced processor, or another processor type.
(J29) RESERVED
(J30) Onboard Battery Connector/Enable
J30 allows use of an optional off-board battery. To enable an external
battery, remove the jumper from pins 3-4, and connect the external battery
cable to J30.
(J31) CPU SX Processor
J31 selects either a PGA Type 486SX in the PGA upgrade socket (U50), or
another processor type.
(J32) CPU Voltage
J32 regulates the CPU voltage.
(J33) Riser LDEV# Bypass
J33 can be used to bypass a Local Bus device # signal if the riser doesn't
provide this signal. If you install a PCI Riser Card in your system, remove
the jumper from J33. (Otherwise, you shouldn't need to adjust this setting.)
(J34) Front Panel Connector
J34 is an 8-pin header connector for the front panel LEDs.
(J35) Keyboard Lock
J35 is a 2-pin header connector.
(J36) Speaker Connector/Enable
J36 selects either the built-in speaker or an optional auxiliary speaker.
There is a jumper over Pins 3-4 of this connector, which enables the onboard
speaker. To use an external speaker, remove the jumper from pins 3-4 and
connect your external speaker's cable to pins 1 and 4 of J36. (Save the
jumper for future use.)
(J37) Onboard DRAM Disable
J37 can be used to disable your system's onboard DRAM (if installed).
(J38) Auxiliary 12V Fan Connector
J38 provides 12V for the auxiliary fan.
(J39) CPU Type (RESERVED)
(J40) RESERVED
(J41) RESERVED
Motherboard layout for Packard Bell 486 Computer.
Table of Content
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Copyright © Eddie Yan 1997, 1998, 1999. All right reserved.
