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)
Two Serial Ports
One Parallel Port
One PS/2 mouse interface
One PS/2 keyboard interface
Phoenix BIOS
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.