Micronics Mpower3 Motherboard

Part # 09-00172-xx


FEATURES

LPX (all in one) form factor system board (13.25 inches by 8.5 inches).

PQFP (Plastic Quad Flat Pack) 80486SX CPU with Upgrade socket.

One ISA/VESA bus slot built onto the motherboard.

A riser card to accommodate four ISA and one ISA/VL-Bus slots.

On-board Super I/O controller (NS 87311).

VESA VL-Bus compliant.

Four 72 x 36 SIMM sockets.

One 80 pin proprietary cache socket.

Micronics' field proven chip set with an on-chip external secondary cache controller.

On-board peripherals including:

Two 16450 serial ports

One parallel port.

One floppy connector, and one EIDE Interface.

On-board local bus video adapter, using the S3 P86C805 video controller.

CPU clock is switch selectable between 25 and 33 MHz.

Supports the following processors in the processor enhancement socket when a 486SX chip is installed as the primary CPU:

4875X-25, Overdrive (tm) 50, and Overdrive (tm)66.

Otherwise, the enhancement socket supports 486DX-33, 486DX2-50, or 486X(2-66.

* Battery-backed real-time clock.


PERFORMANCE

The following are performance ratings at SX-25MHZ, SX-33MHZ, DX2-5OMHZ, and DX2-66MHZ

PERFORMANCE AT SX-25MHZ

Under Landmark version 2.0, the speed rating is 83.82 MHz.

Under Power meter version 1.8, the rating is 8.1 MIPS.

Under Winbench 3.1 at 1024 X 768 @256 Colors, the Winmark is 11,463,232.

Under Norton SI version 4.5, the rating is 39.5.

PERFORMANCE AT SX-33MHZ

Under Landmark version 2.0, the speed rating is 111.77 MHz.

Under Power meter version 1.8, the rating is 10.8 MIPS.

Under Winbench 3.1 at 1024 X 768 @256 Colors, the Winmark is 13,255,569

Under Norton Si version 4.5, the rating is 52.6.

PERFORMANCE AT DX2-50MHZ

Under Landmark version 2.0, the CPU speed rating is 167.66 MHz

Under Power meter version 1.8, the rating is 15.5 MIPS.

Under Winbench 3.1 at 1024 X 768 @256 colors, the Winmark is 14,025,307.

Under Norton Si version 4.5, the rating is 78.3.

PERFORMANCE AT DX2-66MHZ

Under Landmark version 2.0, the CPU speed rating is 223.55 MHz.

Under Power meter version 1.8, the rating is 20.2 MIPS.

Under Winbench 3.1 at 1024 X 768 @256 colors, the Winmark is 14,935,683.

Under Norton SI version 4,5, the rating is 104.4.


SPECIFICATIONS

MOTHERBOARD

Processor Options Intel 80486SX (tm) 25MHz (MPower 3/25)

Intel 80486DX (tm) 33MHz (Power 3/33)

Intel 80486DX2 (tm) 50MHz (MPower 3/50)

Intel 80486DX2 (tm) 66MHz (MPower 3/66)

CPU Options Intel OverDrive Ready (tm)

Expansion Vertical riser card provides:

One combination 32-bit VL-Bus/ l6-Bit ISA slot, full-length

Two l6 Bit ISA slots, full-length

Two 16 Bit ISA slots, half-length

RAM Capacity Four 72 pin x 36 bit SIMM sockets, which accommodates up to 64MB of RAM

Cache 8K of internal cache memory

Cache Upgrade Optional 64K or 256K of secondary cache memory. Proprietary 80 pin COAST (Cache On A Stick) style PCB.

Built-In Video S3 86C805 GUl Accelerator

1MB DRAM frame buffer

Resolutions supported:

640x480 (65,536 Colors)

800x600 (256 Colors)

1024x768 (256 Colors)

1280x1024 (16 Colors)


Built-In I/O

Two Serial Ports

One Parallel Port

One PS/2 mouse interface

One PS/2 keyboard interface

Phoenix BIOS


Power

Power Supply 200 Watt switching type UL listed, CSA certified Over-power protection, over-voltage protection, short protection

Power Input 110VAC or 22OVAC (user selectable)

Monitor Receptacle 110/22OVAC 1.OA maximum (switched)

Power Output: DC +5V +12V -5V -12V

Maximum Load 20A 8A 0.5A 0.5A


MPOWER3 MOTHERBOARD JUMPER SETTINGS

Table 4-1. CPU SeIection

JUMPER CONFIGURATION SETTING

W20	UPGRADE CPU OverDrive (tm)			PINS 1-2 
W20	486DX-33, DX2-50 & DX2-66			PINS 2-3
W20	4&6SXPQFP					NOT INSTALLED 
W22	486DX ALL					PINS 1-2	
486SX	ALL						PINS 2-3 
J30	DISABLE ON-BOARD 486SX PQFP			INSTALLED						
.	ENABLE ON-BOARD 4865X PQFP			NOT INSTALLED 


Table 4-2. On Board Feature Configuration 

Floppy	IDE	COM-A	COM-B	PARALLEL	W4	W5	W6	W7	W8 
PRI	PRI	COMI	COM2	LPT1		2-3	2-3	2-3	2-3	1-2 
PRI	DSBL	COMI	COM2	LPTI		2-3	1-2	1-2	2-3	1-2 
PRI	PRI	DSBL	DSBL	LPTI		1-2	2-3	2-3	2-3	1-2 
DSBL	DSBL	COMI	COM2	LPTI		1-2	2-3	1-2	2-3	1-2
DSBL	DSBL	DSBL	DSBL	DSBL		1-2	1-2	1-2	1-2	1-2 
PRI= Feature uses primary I/O address (refer to table 4-3) 
DSBL= Feature disabled 
NOTE: Table 4-2 shows only the most common configurations. Refer to Appendix D for the complete list.


Table 4-3 I/O Addresses for the ON-Board Features 
FEATURE I/O ADDRESS 

Floppy (Primary)	3F0-F8h
IDE (Primary)	1F0-1F7h, 3F6-3F7h
IDE (Secondary)	170-177h, 376-377h
COM1			3F8-3FFh
COM2			2F8-2FFh
COM3			3E8-3EFh
COM4			2E8-2EFh
LPT1			3BC-3BEh
1PT2			378-37Fh


Table 4-4. Onboard VGA Configuration 
JUMPER CONFIGURATION SETTING 

J4	ENABLE ON-BOARD VIDEO BIOS		INSTALLED				
.	DISABLE ON-BOARD VIDEO BIOS		NOT INSTALLED
W14	ENABLE ON-BOARD VIDEO CHIP		PINS 2-3				
.	DISABLE ON-BOARD VIDEO CHIP		PINS 1-2
W18	VIDEO MEMORY SIZE: 1MB			PINS 1-2				
.	VIDEO MEMORY SIZE: 0.5MB			PINS 2-3


Table4-5 Parallel Port Selection 
JUMPER CONFIGURATION SETTING 

W1	INPUT		PINS 1-2
W1	OUTPUT		PINS 2-3


Table 4-6. Remaining Jumper and Connectors 

JI	PARALLEL PORT (PRINTER) CAN BE SET AS LPT1 OR LPT2
J2	COM PORT B CAN BE SET AS COM2 OR COM4
J3	VIDEO CONNECTOR
J5	PS/2 MOUSE CONNECTOR
J6	PS/2 (MINI DIN) KEYBOARD CONNECTOR
J7	COM PORT A CAN BE SET AS COM1 OR COM3
J11	EXTERNAL BATTERY CONNECTOR			PIN 1-POSITIVE ; PINS 2-3 GND
J13	VIDEO FEATURE CONNECTOR
J17	HDD LED						1-SIGNAL 2-GROUND
J20	RESET SWITCH					1-SIGNAL 2-GROUND
J21	TURBO LIGHT					1-SIGNAL 2-GROUND
J22	TURBO SWITCH					1-SIGNAL 2-GROUND
J9 & J12 POWER SUPPLY CONNECTOR(s)
J23	POWER LED/KEYLOCK				1-POWER LED;	2-N/C																		
.							3-GROUND; 4-KEYBD LOCK																		
.							5-GROUND
J24	SPEAKER CONNECTOR				1-SPEAKER; 2-N/C																		
.							3-GROUND; 4-(+)5V DC


Table 4-7. DIP Switch 1 Settings 
The Mpower3 MB has one 8 position DIP switch installed 
SW-I CONFIGURATION SETTING 

1	MEMORY SIZE See Table 4-9
2	MEMORY SIZE "
3	MEMORY SIZE "
4	MEMORY SIZE "
5	CPU SPEED SELECT See Table 4-8
6	CPU SPEED SELECT "
7	CPU SPEED SELECT "
8	CPU SPEED SELECT "


Table 4-8. CPU Speed Select 

SETTINGS		Sw1-5	Sw1-6	SWI-7	SW1-8
33mhz/DX2-66MHz		OFF	ON	OFF	OFF
25MHz/DX2-5OMHz		ON	OFF	ON	OFF
40Mhz/DX2-80Mhz		Not documented.


For each memory increase (or decrease) certain DIP switches have to be adjusted to match the memory size. Table 4-9 lists the different memory sizes along with their settings. 
Table 4-9. Memory Size Settings 

MEMORY		BANKS				 DIP SWITCH 1 SWITCHES 1-4
MB		0	1	2	3	S1	S2	S3	S4	
4		4MB	X	X	X	ON	ON	ON	ON
8		4MB	4MB	X	X	OFF	ON	ON	ON
12		4MB	4MB	4MB	X	ON	OFF	ON	ON
16		4MB	4MB	4MB	4MB	OFF	OFF	ON	ON
16		16MB	X	X	X	ON	ON	OFF	ON
20		4MB	16MB	X	X	ON	ON	OFF	OFF
24		4MB	4MB	16MB	X	ON	OFF	ON	OFF
28		4MB	4MB	4MB	16MB	OFF	ON	ON	OFF
32		16MB	16MB	X	X	OFF	ON	OFF	ON
36		4MB	16MB	16MB	X	ON	OFF	OFF	OFF
40		4MB	4MB	16MB	16MB	OFF	OFF	ON	OFF
48		16MB	16MB	16MB	X	ON	OFF	OFF	ON
52		4MB	16MB	16MB	16MB	OFF	OFF	OFF	OFF
64		16MB	16MB	16MB	16MB	OFF	OFF	OFF	ON

WHEN BIOS SHADOW IS ENABLED. THE ADDRESS REGION FCOOOO~FFFFFF IS USED TO COPY THE VIDEO

AND SYSTEM ROMS. THE MEMORY ADDRESSES ABOVE 16MB WILL NO LONGER BE CONTIGUOUS. THEREFORE,

IF MORE THAN 16MB IS INSTALLED, BIOS SHADOW MUST BE DISABLED.

NOTE!! The Mpower3 DOES NOT support dual density 2MB/8MB/32MB SIMM's.