VIPER 804 Motherboard Settings and Configuration

Processor	80386SX/CX486SLC/TI486SLC
Processor Speed	33MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	16MB
Maximum Video Memory	None
Cache	512/1024KB
BIOS	Unidentified
Dimensions	Unidentified
I/O Options	Floppy drive interface, IDE interface, parallel port, PS/2 mouse interface, serial ports (3), PC/104 interfaces (2)
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
IDE interface	J1	Parallel port	J7
Floppy drive interface	J2	External battery	J8
Keyboard, speaker, reset, LED	J3	Serial port 1 - internal	J9
Serial port 2	J4	PS/2 mouse interface	J10
Power connector	J5	PC/104 connectors	P1 & P2
Serial port 1 - external	J6

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	BIOS boot select normal boot	J11	Open
	BIOS boot select emergency boot	J11	Closed
	External battery connected to J8	W1	Pins 1 & 2 closed
	External battery connected to J5	W1	Pins 2 & 3 closed
»	Power fail monitoring disabled	W3	Open
	Power fail monitoring enabled	W3	Closed
»	IOCHRDY signal to IDE interface disabled	W4	Open
	IOCHRDY signal to IDE interface enabled	W4	Closed
»	Watchdog timer enabled	W5	Closed
	Watchdog timer disabled	W5	Open
»	Flash BIOS write enabled	W6	Closed
	Flash BIOS write disabled	W6	Open
»	Flash disk write enabled	W7	Closed
	Flash disk write disabled	W7	Open
»	Battery type select internal	W10	Pins 1 & 2 closed
	Battery type select external	W10	Pins 2 & 3 closed
»	Power failure detection source external power fail (pin 6 on J5)	W11	Pins 1 & 2 closed
	Power failure detection source internal/external battery <3v	W11	Pins 2 & 3 closed
»	SYSCLK select 8MHz (asynchronous)	W18	Closed
	SYSCLK select programmed in BIOS setup (synchronous)	W18	Open
»	Parallel port IRQ select IRQ7	W20	Pins 2 & 3 closed
	Parallel port IRQ select IRQ5	W20	Pins 1 & 2 closed

SIMM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	None
4MB	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	None
16MB	(2) 4M x 9	(2) 4M x 9

SOLID STATE DISK CONFIGURATION

Note: To increase the size of the SSD, install upgrade in U13.

DMA CHANNEL SELECTION
Channel		W21	W22
»	None	Open	Open
	1	Pins 1 & 2 closed	Pins 1 & 2 closed
	3	Pins 2 & 3 closed	Pins 2 & 3 closed

SERIAL PORT 2 LOOPBACK SELECTION
Setting		W12	W13
»	Normal	Open	Open
	Loopback	Closed	Closed

SERIAL PORT 2 SELECTION
Setting		W14	W15	W16	W17
»	RS-232	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
	RS-485	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

FLOPPY DRIVE EDOUT SELECTION
Setting		W9
»	Left to software	Open
	Ground to pin 17 on J3	Pins 2 & 4 closed
	Ground to pin 29 on J3	Pins 3 & 4 closed
	EDOUT to pin 29 on J3	Pins 1 & 3 closed
	EDOUT to pin 17 on J3	Pins 1 & 2 closed

FLOPPY DRIVE HDOUT SELECTION
Setting		W8
»	Left to software	Open
	Ground to pin 27 on J3	Pins 2 & 4 closed
	Ground to pin 33 on J3	Pins 3 & 4 closed
	HDOUT to pin 33 on J3	Pins 1 & 3 closed
	HDOUT to pin 27 on J3	Pins 1 & 2 closed

BASE I/O SELECTION
Address		W19
»	190H	Pins 1 & 2, 3 & 4 closed
	290H	Pins 1 & 2 closed
	390H	Pins 3 & 4 closed
	390H	Open

EXTENDED BIOS MODE SELECTION
Setting		W2
	VT100	Pins 5 & 6 closed
	Serial download	Pins 7 & 8 closed
»	Standard mode	Pins 5 & 6 closed
»	Normal mode	Pins 7 & 8 closed