Packard Bell 286X M/Board

286x Motherboard Diagram

Specification

Battery : 3.6 Volts. NiCad "barrel" soldered on motherboard
BIOS : 2 X 32Kb - Phoenix 3.10.115. To access, Ctrl+Alt+S.
Cache : N/A
Clock/Driver : Not removable , soldered on motherboard
Cover Removal : 1 screw , back left edge at center. 1 screw , back right edge at center
CPU : 80286-12 MHz. Keyboard switches : (Ctrl)-(Alt)-(+) = 6/12 MHz
Drive Cavities :
- 1 x 3 ˝ half-height (enclosed)
- 2 x 5 Ľ half-height (enclosed)
- 1 x 3 ˝ half-height (exposed/vertical)
I/O Expansion slots : 3 x 16-bit ISA, 1 x 8-bit ISA
Interfaces :
- 1 DB-25 Parallel Port
- 2 RS-232C, DB-9 Serial Port
- 1 PS/2 Keyboard Port
- 1 PS/2 Mouse Port
Keyboard : 101 Key enhanced PS/2
Power Supply :
- 100 W : Fuse F4A 250V, switchable 110/220V , 50/60 Hz
- 120V:3A :60Hz:outlet 1A
- 220V:1.5A:50Hz:outlet 0.5A
RAM : Standard on motherboard : 1MB. Maximum on motherboard : 4MB (Use 256Kb/1MB SIMMs 9-bit 100ns).
Speaker : Piezoelectric soldered on mothboard.
Video : VGA card on expansion slot. PBVGA Multi or SVGA. 800 x 600 , 16-bit, 256k

Jumper	Function	Pins	Description
J7	Serial Port	1-2 Closed 1-2 Open	* Com1 Enabled Com1 Disabled
		3-4 Closed 3-4 Open	* Com2 Enabled Com2 Disabled
J14	RAM Wait State	Closed Open	* 0 Wait State 1 Wait State
J15	SIMM Type	Closed Open	* 256k x 9 1MB x 9
J16	384k Relocation	Closed Open	* Disabled Enabled
J17	Parallel Port	1-2 2-3	* LPT1 LPT2
J18	Parallel Port IRQ	1-2 2-3	IRQ5 * IRQ7
J21	Floppy Controller	Closed Open	* Enabled Disabled
J22	Display Mode	Closed Open	* Colour Monochrome
J23	IDE Controller	Closed Open	* Enabled Disabled

1. Parallel Port LPT1 must be set to IRQ7, LPT 2 must be set to IRQ5
2. * Indicates default settings.

Cache Memory : This system does not support cache memory.
Maths Co-Processor : An 80287-8 co-processor can be installed, no jumpers need to be changed.
RAM :

Total
Memory SIMMs Jumpers Extended
Memory

1MB Four 256k x 9
(Banks 0 and 1) J14 ON*
J15 ON*
J16 ON* 384

2MB Two 1MB x 9
(Bank 0) J14 ON*
J15 OFF
J16 OFF 1408

4MB Four 1MB x 9
(Bank 0 and 1) J14 ON*
J15 OFF
J16 OFF 3456

* Default Setting
Base Memory = 640 (always)
J16 OFF Enables 384k Relocation, this is optional
Recommended SIMM speed is 100ns
Video Memory : This system is NOT VESA compatible. This system has 256k video memory soldered (not upgradeable).

Total Memory	SIMMs	Jumpers	Extended Memory
1MB	Four 256k x 9 (Banks 0 and 1)	J14 ON* J15 ON* J16 ON*	384
2MB	Two 1MB x 9 (Bank 0)	J14 ON* J15 OFF J16 OFF	1408
4MB	Four 1MB x 9 (Bank 0 and 1)	J14 ON* J15 OFF J16 OFF	3456