DECPC LPX+ Motherboard Settings and Configuration

Processor	SL80486SX/SL80486DX/SL80486DX2/SL80486DX4/P24T
Processor Speed	25/33/40/50(internal)/50/66(internal)/100(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	128/256KB
BIOS	Unidentified
Dimensions	254mm x 218mm
I/O Options	32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel port	CN1	IDE interface	CN5
Serial port	CN2	Floppy drive interface	CN6
Serial port	CN3	32-bit VESA local bus slots	SL1 & SL2
PS/2 mouse port	CN4

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Monitor type select monochrome	J14	Open
	Monitor type select color	J14	Closed
»	Password normal operation	J15	Open
	Password clear	J15	Closed
»	Reset switch enabled	J24	Closed
	Reset switch disabled	J24	Open
»	Factory configured – do not alter	J36	Closed
»	VLRDY >CPURDY connects to CPU bus ready	J44	Pins 1 & 2 closed
	VLRDY >LRDY synchronized through chipset	J44	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(2) 256K x 36	(2) 256K x 36
4MB	(2) 512K x 36	None
8MB	(2) 1M x 36	None
16MB	(2) 2M x 36	None
16MB	(2) 1M x 36	(2) 1M x 36
24MB	(2) 2M x 36	(2) 1M x 36
32MB	(2) 4M x 36	None
32MB	(2) 2M x 36	(2) 2M x 36
40MB	(2) 4M x 36	(2) 1M x 36
48MB	(2) 4M x 36	(2) 2M x 36
64MB	(2) 4M x 36	(2) 4M x 36
Note: The location of banks 0 & 1 are unidentified.

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
128KB	(4) 32K x 8	None	(2) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(2) 32K x 8
Note: The location of banks 0 & 1 are unidentified.

CACHE JUMPER CONFIGURATION
Size	J4	J5	J6	J7
None	Open	Open	Open	Open
128KB	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
256KB	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

CPU SPEED SELECTION
Speed	J1	J2	J3
25MHz	Open	Closed	Closed
33MHz	Closed	Open	Closed
40MHz	Closed	Open	Open
50iMHz	Open	Closed	Closed
50MHz	Open	Open	Open
66iMHz	Closed	Open	Closed
100iMHz	Closed	Open	Closed

CPU TYPE SELECTION
Type	J35
SL80486SX	Pins 2 & 3 closed
SL80486DX	Pins 2 & 3 closed
SL80486DX2	Pins 2 & 3 closed
SL80486DX4	Pins 2 & 3 closed
P24T	Pins 1 & 2 closed

VL BUS WAIT STATE SELECTION
Setting		J28
»	0	Pins 1 & 2 closed
	1	Pins 2 & 3 closed