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Packard Bell 286 IS/VT286 M/Board

Specification

NOTE: PB286 with the old motherboard is also known as the IS/VT286.

  • Battery : 3.5 Lithium, removable
  • BIOS : 2 x 32KB - Packard Bell 3.90P. TO access Setup, Run SETUP.EXE Program
  • Cache : N/A
  • Clock/Driver : (RTC)
  • Cover Removal :
    • PB286 : 2 screws on front under slide covers
    • IS/VT286 : 5 screws on edge of rear panel
  • CPU : 80286-10MHz 80286-12MHz
    • PB286 - Keyboard Switchable (Ctrl)-(Alt)-(+) = 12 MHz. (Ctrl)-(Alt)-(-) = 8 MHz
    • IS/VT286 Hardware Switchable Speed Select Button - Speed Turbo Position : 12, STD Position : 8
  • Drive Cavities : 3 X half-height (exposed), 2 X half-height (enclosed)
  • I/O Expansion slots : 5 x 16-bit ISA, 3 x 8-bit ISA
  • Interfaces :
    • 1 DB-25 Parallel Port
    • 1 RS-232, DB-9 Serial Port
    • 1 5-pin DIN Keyboard Port
    • 1 PS/2 Mouse Port
    • 1 15-pin VGA Port
  • Power Supply : 210 watts 115v: (50Hz) /230v: (60)
  • RAM : Standard on motherboard : 640Kb Maximum on motherboard : 1MB
  • Speaker : Internal - cone on chassis
  • Video : PB-EGA or PB-EGA/RS on expansion slot.

DIP Switches

The PB286 has 2 motherboard revisions, the IS/VT286 is the old motherboard.

The old version of this motherboard does not have DIP SWITCH 1

Dip Switches (SW1)

SwitchFunctionPinsDescription
S1RAM SizeON
OFF
640k or 640k + 384k
256k or 512k
S2RAM SizeON
OFF
512k or 640k + 384k
256k or 640k
S3System ClockON
OFF
Low
High or Middle
S4System ClockON
OFF
Middle or Low
High or Low
S5ReservedOFF 
S6ReservedOFF 
S7Display ModeON
OFF
Colour
Monochrome
S8287 Clock SelectON
OFF
10 MHz
4.77 MHz

SW2 Settings (ROM Selector)

SwitchFunctionPinsDescription
S1ROM SizeON
OFF
128k
256k
S2ROM SizeON
OFF
128k
256k
S3ROM SizeON
OFF
256k
128k
S4ROM SizeON
OFF
256k
128k

Upgrades

  • Cache Memory : This system does not support cache memory.
  • Maths Co-Processor : A math co-processor can be installed in U99, no jumpers need to be changed. Use a 80287-6 for 6-8-10 MHz systems and a 80287-8 for 12 MHz systems.
  • RAM : Upgradeable to 1MB by adding (4)256Kx4 and (2)256Kx1. If you want to install Memory Card(s), in your 1 MB RAM system, be sure to select SW1-1 ON, SW1-2 OFF.
  • Video Memory : This system has a video card, upgrade depends on card.