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386SX
COMMODORE BUSINESS MACHINES, INC.
386SX
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Processor
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80386SX
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Processor Speed
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16/20/25MHz
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Chip Set
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Unknown
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Max. Onboard DRAM
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16MB
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Cache
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None
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BIOS
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Commodore
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Dimensions
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254mm x 218mm
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I/O Options
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16-bit riser card slot, bus mouse port, floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA interface
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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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16-bit riser card
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CN1
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Turbo LED
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J3
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VGA port
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CN2
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Turbo switch
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J4
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Serial port 2
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CN3
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Reset switch
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J5
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Serial port 1
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CN4
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IDE interface
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J9
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Parallel port
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CN5
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Floppy drive interface
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J10
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Bus mouse port
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CN6
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Game port
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J12
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Power LED & keylock
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J1
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External battery
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J15
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IDE interface LED
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J2
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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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Monitor type select color
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J6
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Closed
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Monitor type select monochrome
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J6
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Open
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IDE interface enabled
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J7 and J8
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Closed
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IDE interface disabled
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J7 and J8
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Open
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Battery type select internal
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J14
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pins 1 & 2 closed
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Battery type select external
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J14
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pins 2 & 3 closed
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| »
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VGA port wait states select one
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J16
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Open
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VGA port wait states select zero
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J16
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Closed
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VGA port enabled
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J17
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Closed
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VGA port disabled
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J17
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Open
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Floppy interface enabled
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J23
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pins 1 & 2 closed
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Floppy interface disabled
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J23
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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
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Bank 1
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Bank 2
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Bank 3
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1MB
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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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1.5MB
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(2) 256K x 9
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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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2MB
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(2) 256K x 9
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(2) 256K x 9
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(2) 256K x 9
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(2) 256K x 9
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2MB
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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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3MB
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(2) 256K x 9
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(2) 256K x 9
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(2) 1M x 9
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NONE
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4MB
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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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5MB
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(2) 256K x 9
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(2) 256K x 9
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(2) 1M x 9
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(2) 1M x 9
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6MB
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(2) 1M x 9
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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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8MB
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(2) 1M x 9
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(2) 1M x 9
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(2) 1M x 9
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(2) 1M x 9
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12MB
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(2) 1M x 9
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(2) 1M x 9
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(2) 4M x 9
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NONE
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16MB
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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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PARALLEL PORT CONFIGURATION
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Parallel port
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IRQ
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J13
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J18
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J19
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LPT1
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5
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pins 3 & 4 closed
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Open
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Closed
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LPT1
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7
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pins 1 & 2 closed
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Open
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Closed
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LPT2
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5
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pins 3 & 4 closed
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Closed
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Closed
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LPT2
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7
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pins 1 & 2 closed
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Closed
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Closed
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LPT3
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5
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pins 3 & 4 closed
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Closed
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Open
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LPT3
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7
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pins 1 & 2 closed
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Closed
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Open
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Disabled
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N/A
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N/A
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Open
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Open
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SERIAL PORT CONFIGURATION
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UART1
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UART2
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J20
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J21
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J22
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COM1
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COM2
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pins 1 & 2 closed
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pins 1 & 2 closed
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pins 1 & 2 closed
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COM1
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Disabled
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pins 1 & 2 closed
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pins 2 & 3 closed
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pins 1 & 2 closed
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COM2
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COM1
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pins 1 & 2 closed
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pins 1 & 2 closed
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pins 2 & 3 closed
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Disabled
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COM1
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pins 2 & 3 closed
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pins 1 & 2 closed
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pins 2 & 3 closed
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Disabled
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COM2
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pins 2 & 3 closed
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pins 1 & 2 closed
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pins 1 & 2 closed
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COM2
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Disabled
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pins 1 & 2 closed
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pins 2 & 3 closed
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pins 2 & 3 closed
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Disabled
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Disabled
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pins 2 & 3 closed
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pins 2 & 3 closed
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N/A
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