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80386SX
SOFTSYS COMPUTER CENTERS, INC.
80386SX
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Processor
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80386SX
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Processor Speed
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8/16MHz
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Chip Set
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C & T NEAT
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Max. Onboard DRAM
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8MB
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SRAM Cache
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None
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BIOS
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AMI
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Dimensions
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330mm x 218mm
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I/O Options
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None
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NPU Options
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80387SX
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CONNECTIONS
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Purpose
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Location
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Purpose
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Location
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Power LED & keylock
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J1
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Turbo LED
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J5
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Speaker
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J2
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External battery
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J6
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Turbo switch
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J3
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Auxiliary keyboard
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J7
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Reset switch
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J4
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USER CONFIGURABLE SETTINGS
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Function
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Jumper
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Position
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NPU mode select synchronous with CPU
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JP4
JP6
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open
pins 2 & 3 closed
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NPU mode select asynchronous with CPU
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JP4
JP6
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closed
pins 1 & 2 closed
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NPU enabled
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JP5
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closed
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NPU disabled
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JP5
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open
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BIOS ROM type select 27256
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JP7
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pins 1 & 2 closed
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BIOS ROM type select 27512
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JP7
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pins 2 & 3 closed
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Monitor type select monochrome
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JP8
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pins 2 & 3 closed
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Monitor type select color
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JP8
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pins 1 & 2 closed
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8042 switch CPU speed select pin 23
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JP9
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pins 1 & 2 closed
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8042 switch CPU speed select pin 30
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JP9
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pins 2 & 3 closed
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DRAM CONFIGURATION
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Size
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Bank 0(SIMM)
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Bank 1 (SIMM)
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Bank 2 (DIP)
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Bank 3 (DIP)
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512KB
1
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(2) 256K x 9
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NONE
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NONE
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NONE
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512KB
2
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NONE
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NONE
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(18) 41256
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NONE
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1MB
1
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(2) 256K x 9
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(2) 256K x 9
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NONE
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NONE
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1MB
2
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NONE
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NONE
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(18) 41256
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(18) 41256
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1.5MB
1
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(2) 256K x 9
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(2) 256K x 9
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(18) 41256
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NONE
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1.5MB
2
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(2) 256K x 9
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NONE
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(18) 41256
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(18) 41256
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2MB
1
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(2) 256K x 9
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(2) 256K x 9
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(18) 41256
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(18) 41256
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2MB
1
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(2) 1M x 9
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NONE
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NONE
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NONE
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2MB
2
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NONE
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NONE
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(18) 411000
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(18) 411000
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4MB
1
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(2) 1M x 9
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(2) 1M x 9
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NONE
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NONE
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4MB
2
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(2) 1M x 9
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NONE
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(18) 411000
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(18) 411000
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5MB
1
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(2) 1M x 9
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(2) 1M x 9
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(18) 41256
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(18) 41256
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5MB
1
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(2) 1M x 9
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(2) 1M x 9
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(18) 411000
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NONE
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5MB
2
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(2) 1M x 9
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(2) 1M x 9
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(18) 41256
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(18) 41256
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6MB
1
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(2) 1M x 9
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(2) 1M x 9
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(18) 411000
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(18) 411000
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6MB
2
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(2) 1M x 9
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(2) 1M x 9
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(18) 411000
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(18) 411000
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8MB
1
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(2) 4M x 9
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(2) 4M x 9
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NONE
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NONE
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Note
1
:Jumpers JP1 and JP2 pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10,and 11 & 12 closed.
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Note
2
:Jumpers JP1 and JP2 pins 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, and 6 & 7 closed.
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