PB 386 16/20 Supreme Motherboard Layout

Sockets
Jumpers
Connectors

Note:

Both versions of this mother board are shown below. The motherboard on the left is the new motherboard layout (386-16 & 386-20), and the board on the right is the old motherboard layout (386-16).

PB 386 16/20 Supreme Sockets

Socket Chip Description
U4 High BIOS
U5 Low BIOS
U7 8042 Keyboard
U11 PLs153N VGN L1
U12 80287 Co-processor
U15 PLs153N VGN L3
U18 80386 Processor
U19 CHIPS 82C206
U20 CHIPS 82C301
U22 CHIPS 82C306
U23 CHIPS 82C304
U24 CHIPS 82C303
U25 CHIPS 82C302
U26 CHIPS 82C305
U27 CHIPS 82C2305
U38 74F244PC

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PB 386 16/20 Supreme Jumpers

NOTE:

Indicates default settings.
JMP1 1-2 Color
Display Type 2-3 Monochrome
JMP2 OLD 1-2 Disable
Coprocessor 2-3 Enable
JMP2 NEW 1-2 80387
Coprocessor 3-4 None
5-6 80287
JMP3 NEW 1-2 256k
EMPROM 2-3 512k
JMP4 OLD 1-2 Enabled
Auxiliary IOCS16 2-3 Disabled

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PB 386 16/20 Supreme Connectors

J1 Keyboard
J2 Battery
J3 Power LED and Keylock
J4 Reset
J5 Speaker

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