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Packard Bell 386 33 M/Board

386 33 Motherboard Diagram

Specification

386-25 and 386-33 are basically the same. Jumper settings and motherboard layout may vary.

  • Battery : DS1287 soldered on Motherboard
  • BIOS : 2 X 32K Phoenix BIOS Phoenix 1.10.20C1 (Rev. D), Phoenix 1.10.19C2 (Rev. F). To access setup, Ctrl+Alt+Ins
  • Bus Architecture : ISA based system bus
  • Cache : 64K, 35 ns
  • CPU : 80386-33 MHz. Keyboard Switchable Ctrl-Alt-1 = 8 MHz, Ctrl-Alt-2 = 33 MHz. Use number keys on numeric pad.
  • Expansion Slots :
    • 2 x 32-bit ISA
    • 5 x 16-bit ISA slots
    • 1 x 8-bit ISA slot
  • Interfaces :
    • 1 DB-25 Parallel Port
    • 2 DB-9 Serial ports
    • 1 Keyboard Port
    • 1 Ext. VGA Conn 15 pin
  • RAM : 4MB standard Maximum on Motherboard 8 MB
  • Speaker : Piezoelectric, soldered on motherboard
  • Video : Oak, Trident, PBVGA Multi, or SVGA

Jumpers

FunctionJumperDescription
SIMM TypeE3-E5
E2-E4, E3-E5
None
Static Column
Fast Paged
RAS/CAS
Total RAMNone
E7-E9
E6-E8
E6-E8, E7-E9
1MB
2MB
4MB
8MB
RAM SizeE16-E18, E17-E19
E18-E20, E19-E21
256k SIMM
1MB SIMM
Parallel PortE25-E26, E29-E30
E26-E27, E28-E29
LPT1 (IRQ7)
LPT2 (IRQ7)
Serial Port 1 - COM1E31-E32
E32-E33
Enabled
Disabled
Serial Port 2 - COM2E34-E35
E35-E36
Enabled
Disabled
Video DisplayE37-E38
E38-E39
Monochrome
Colour
Keyboard ResetE40-E41
E41-E42
Enabled
Disabled
Math CoprocessorE43-E44
E44-E45
Installed
Not Installed
Printer AcknowledgeE46-E47
E47-E48
Leading Edge
Trailing Edge
EPROM SizeE49-E50
E50-E51
64K
128K
TestE52-E53Leave Open

Upgrades

  • Battery : DS1287 soldered on motherboard.
  • Maths Co-Processor : This system supports the 80387-33 Math Co-processor. It is installed at location U79. No jumper settings are required.
  • RAM : 4MB standard Maximum on Motherboard 8 MB. This board will accept RAS/CAS, Fast-Paged, or Static Column memory upto 8MB. See the jumpers section for necessary jumper changes when upgrading memory.