5500AT Motherboard Settings and Configuration

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5500AT

Processor
80286 (Exact location is unknown)
Processor Speed
8/10/12/16/20/25MHz
Chip Set
SIS
Max. Onboard DRAM
5MB
Cache
None
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
Floppy drive interface, IDE interface, Joystick port, parallel port,
NPU Options
80287

CONNECTIONS
Purpose
Location
Purpose
Location
Parallel port
CN1
IDE interface
J10
Joystick port
CN2
Floppy drive interface
J12
Serial port 2 (25 pin)
CN3
Speaker
J15
Serial port 1 (9 pin)
CN4
IDE interface LED
J29
Function panel connector
J4
Riser Card
S1
External battery
J9

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Joystick port enabled
J17
closed

Joystick port disabled
J17
open
»
IDE interface enabled
J28
open

IDE interface disabled
J28
closed
»
Floppy drive interface enabled
J33
closed

Floppy drive interface disabled
J33
open
»
Parity enabled
J34
closed

Parity disabled
J34
open

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
1MB
(8) 441100
NONE
NONE
1MB
(4) 256K x 9
NONE
NONE
2MB
(4) 256K x 9
(4) 256K x 9
NONE
3MB
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
NONE
NONE
5MB
(4) 256K x 9
(4) 1M x 9
NONE

SERIAL PORT CONFIGURATION
Port 1 (CN4)
Port 2 (CN2)
J20
J22
J25
J26
»
COM1
COM2
pins 2 & 3
pins 1 & 2
Open
Open

COM1
COM3
pins 2 & 3
Open
pins 1 & 2
Open

COM1
COM4
pins 2 & 3
Open
Open
pins 1 & 2

COM2
COM1
pins 1 & 2
pins 2 & 3
Open
Open

COM2
COM3
Open
pins 2 & 3
pins 1 & 2
Open

COM2
COM4
Open
pins 2 & 3
Open
pins 1 & 2

COM3
COM1
pins 1 & 2
Open
pins 2 & 3
Open

COM3
COM2
Open
pins 1 & 2
pins 2 & 3
Open

COM3
COM4
Open
Open
pins 2 & 3
pins 1 & 2

COM4
COM1
pins 2 & 3
Open
Open
pins 1 & 2

COM4
COM2
Open
pins 1 & 2
Open
pins 2 & 3

COM4
COM3
Open
Open
pins 1 & 2
pins 2 & 3
Note:Pins designated should be in the closed position.

SERIAL PORT IRQ CONFIGURATION
Port 1 (CN1)
Port 2 (CN2)
J18
J19
»
IRQ4
IRQ3
pins 2 & 3 closed
pins 1 & 2 closed

IRQ3
IRQ4
pins 1 & 2 closed
pins 2 & 3 closed

PARALLEL PORT CONFIGURATION
LPT
IRQ
J16
J21
»
1
7
pins 2 & 3 closed
pins 2 & 3 closed

1
5
pins 2 & 3 closed
pins 1 & 2 closed

2
7
pins 1 & 2 closed
pins 2 & 3 closed

2
5
pins 1 & 2 closed
pins 1 & 2 closed

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5500AT Motherboard Settings and Configuration

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Processor	80286 (Exact location is unknown)
Processor Speed	8/10/12/16/20/25MHz
Chip Set	SIS
Max. Onboard DRAM	5MB
Cache	None
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	Floppy drive interface, IDE interface, Joystick port, parallel port,
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel port	CN1	IDE interface	J10
Joystick port	CN2	Floppy drive interface	J12
Serial port 2 (25 pin)	CN3	Speaker	J15
Serial port 1 (9 pin)	CN4	IDE interface LED	J29
Function panel connector	J4	Riser Card	S1
External battery	J9

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Joystick port enabled	J17	closed
	Joystick port disabled	J17	open
»	IDE interface enabled	J28	open
	IDE interface disabled	J28	closed
»	Floppy drive interface enabled	J33	closed
	Floppy drive interface disabled	J33	open
»	Parity enabled	J34	closed
	Parity disabled	J34	open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
1MB	(8) 441100	NONE	NONE
1MB	(4) 256K x 9	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE
3MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE	NONE
5MB	(4) 256K x 9	(4) 1M x 9	NONE

SERIAL PORT CONFIGURATION
Port 1 (CN4)		Port 2 (CN2)	J20	J22	J25	J26
»	COM1	COM2	pins 2 & 3	pins 1 & 2	Open	Open
	COM1	COM3	pins 2 & 3	Open	pins 1 & 2	Open
	COM1	COM4	pins 2 & 3	Open	Open	pins 1 & 2
	COM2	COM1	pins 1 & 2	pins 2 & 3	Open	Open
	COM2	COM3	Open	pins 2 & 3	pins 1 & 2	Open
	COM2	COM4	Open	pins 2 & 3	Open	pins 1 & 2
	COM3	COM1	pins 1 & 2	Open	pins 2 & 3	Open
	COM3	COM2	Open	pins 1 & 2	pins 2 & 3	Open
	COM3	COM4	Open	Open	pins 2 & 3	pins 1 & 2
	COM4	COM1	pins 2 & 3	Open	Open	pins 1 & 2
	COM4	COM2	Open	pins 1 & 2	Open	pins 2 & 3
	COM4	COM3	Open	Open	pins 1 & 2	pins 2 & 3
Note:Pins designated should be in the closed position.

SERIAL PORT IRQ CONFIGURATION
Port 1 (CN1)		Port 2 (CN2)	J18	J19
»	IRQ4	IRQ3	pins 2 & 3 closed	pins 1 & 2 closed
	IRQ3	IRQ4	pins 1 & 2 closed	pins 2 & 3 closed

PARALLEL PORT CONFIGURATION
LPT		IRQ	J16	J21
»	1	7	pins 2 & 3 closed	pins 2 & 3 closed
	1	5	pins 2 & 3 closed	pins 1 & 2 closed
	2	7	pins 1 & 2 closed	pins 2 & 3 closed
	2	5	pins 1 & 2 closed	pins 1 & 2 closed