4860 MOTHERBOARD Motherboard Settings and Configuration

Processor	80486DX/i860
Processor Speed	25/33MHz
Chip Set	Intel
Max. onboard DRAM	32MB
Cache	None
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	Parallel port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J9	Speaker	J19
Turbo LED/switch	J11	Keylock & power LED	J20
Serial port 1	J13	External battery	J21
Serial port 2	J14	PS/2 mouse interface	J23
Parallel port	J15

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	I860 interrupt select 61.7911msec	JP1	Pins 2 & 3 closed
	I860 timer interrupt select 30.8955msec	JP1	Pins 1 & 2 closed
»	Turbocache not installed	JP2	Closed
	Turbocache installed	JP2	Open
»	IRQ12 disabled	JP3	Pins 1 & 2 closed
	IRQ12 enabled	JP3	Pins 2 & 3 closed
»	Serial port 1 address COM1 select	JP4	Pins 1 & 2 closed
	Serial port 1 address COM3 select	JP4	Pins 2 & 3 closed
»	IRQ4 enabled	JP5	Closed
	IRQ4 disabled	JP5	Open
»	Serial port 2 address COM2 select	JP6	Pins 1 & 2 closed
	Serial port 2 address COM4 select	JP6	Pins 2 & 3 closed
»	IRQ3 enabled	JP7	Closed
	IRQ3 disabled	JP7	Open
»	Parallel port address LPT2 select	JP8	Pins 2 & 3 closed
	Parallel port address LPT1 select	JP8	Pins 1 & 2 closed
»	IRQ7 enabled	JP9	Closed
	IRQ7 disabled	JP9	Open
»	Factory configured-do not alter	JP12	Closed
»	Factory configured-do not alter	JP13	Pins 2 & 3 closed
»	25MHz CPU speed select	JP14	Closed
	33MHZ CPU speed select	JP14	Open
»	Write-protected caching by 486 & Turbocache	JP15	Open
	Write protected caching by Turbocache only	JP15	Closed
»	Factory configured-do not alter	JP17	Open
»	64-bit slot write select CPUWR#	JP18	Pins 2 & 3 closed
	64-bit slot write select BCPUWR#	JP18	Pins 1 & 2 closed
»	Monitor type select monochrome	SW1	Open
	Monitor type select color	SW1	Pins 2 & 3 closed
	Burn-in test enable	SW1	Pins 1 & 2 closed

MOUSE/KEYBOARD BIOS CONFIGURATION
Setting	JP11A	JP11B	JP11C	JP11D	JP11E
XT keyboard	Open	Open	Closed	Closed	Closed
Mouse, AT keyboard	Closed	Closed	Open	Open	Open
No mouse installed	Open	Open	Closed	Closed	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
4MB	(2) 512K x 36	(2) 512K x 36	(2) 512K x 36	(2) 512K x 36
4MB	(2) 1MB x 36	(2) 1MB x 36	NONE	NONE
4MB	(2) 2MB x 36	NONE	NONE	NONE
6MB	(2) 1MB x 36	(2) 1MB x 36	(2) 1MB x 36	NONE
8MB	(2) 1MB x 36	(2) 1MB x 36	(2) 1MB x 36	(2) 1MB x 36
8MB	(2) 2MB x 36	(2) 2MB x 36	NONE	NONE
8MB	(2) 4MB x 36	NONE	NONE	NONE
12MB	(2) 2MB x 36	(2) 2MB x 36	(2) 2MB x 36	NONE
16MB	(2) 4MB x 36	(2) 4MB x 36	NONE	NONE
16MB	(2) 2MB x 36	(2) 2MB x 36	(2) 2MB x 36	(2) 2MB x 36
16MB	(2) 8M x 36	NONE	NONE	NONE
32MB	(2) 8M x 36	(2) 8M x 36	NONE	NONE