Micronics Motherboard Mpower4 Plus

Part number (09-00229-xx)

· LPX form factor system board.

Identification characteristics for this PCB are as follows:

1. All in one architecture with single VESA capable riser card with 1 VESA/ISA and 4 ISA I/O connectors

2. 2 DIP sockets for VRAM upgrade to the left of the riser card slot. (Std Mpower4 has 8 DIP sockets.)

3. Solder pad for PQFP 8046SX surface mount CPU (Plastic Quad Flat Pack)

4. ZIF socket for standard PGA CPU's and overdrive processor upgrades

5. 4 x 72 pin SIMM sockets located on the left front corner of the PCB

6. 10 cache sockets on the right front corner of the PCB

7. SW2, 4 pos'n DIP switch located on left edge of the PCB

8. SW1, 4 pos'n DIP switch located on right side of PCB above cache DIP sockets

9. Integral onboard I/O controller, 2 ser, 1 prl, FDD, IDE. VGA

· 64/128/256KB L2 external cache capable.

- One VL slot built onto the system board. Slot will accommodate riser card which supports up to one VESA and four ISA peripheral cards.

· On-board VESA Local bus video adapter, using the 64-bit ATI mach64 graphics accelerator with 1MB of VRAM (2MB optional).

·· On-board feature connectors accept:

· On-board Local bus IDE controller.

· Floppy controller (supports 2.88MB, 1.44MB, 1.2MB, 720K, and 360K floppy drive).

· Two high speed 16550 compatible serial ports.

· Bi-directional parallel port which is EPP and ECP compatible.

· Battery-backed real-time clock.

Processor Upgrade report.

This MB has been certified for the DX-4 processors by Micronics.

No reports of POD or 5x86 upgrades to date.

CPU Voltage Selection and Processor's supported.

Motherboard autoselects CPU voltage requirement for 3.3V and 5V CPU chips.

No voltage select jumpers on the motherboard.

· Supports the following processors in the CPU ZIF socket:

· 486SX2, 50mhz

· 486DX, 33mhz

· 486DX2, 50 or 66mhz

· 486DX4, 75 or 100 Mhz

· Cyrix DX-2/80 or DX/40

· AMD DX/40, DX-2/80, or DX-4/100

- Pentium Overdrive

Chip Set

Micronics X30 single chip ASIC.

CMD 640A Local Bus IDE

SMC 605 Super I/O Controller

Ram Capacity

4 x 72 pin x 36 SIMM sockets accommodating up to 64MB.

This MB DOES NOT support "dual density" 8MB SIMM's.

Integral Video

ATI 68800 Mach64 LX, 1MB VRAM frame buffer

Resolutions supported:

640 x 480, (65,536 colors)

800 x 600, (256 colors)

1024 x 768, (256 colors)

1280 x 1024, (16 colors)

Keyboard and Mouse interface

Standard PS/2 mini-din keyboard and mouse connectors


Phoenix BIOS on 1MB Flash EPROM

Connector assignments

J1	Parallel port
J2	Serial port 2
J3	Serial port 1
J7	Power LED & keylock
J10	PS/2 mouse port
J26	IDE connector
J27	FDD connector
J31	Video feature connector
J32	VGA port
W18	Turbo LED
W19	Turbo switch
W20	Reset switch
W21	IDE activity LED
SL1	32 bit VESA local bus slot

User Configurable Settings

Cache select write back		U61 Installed
Cache select write through		U61 Not installed
RTC installed				W1 Closed
RTC not installed			W1 OpeN
Monitor type color			W2 Closed
Monitor type monochrome		W2 Open
IRQ12 PS/2 mouse enabled		W3 Closed
PS/2 mouse disabled			W3 Open
Parity enabled			W4 Closed
Parity disabled			W4 Open
CMOS normal operation			W5 Open
CMOS memory clear			W5 Closed
Super I/O enabled			W7 Open
Super I/O disabled			W7 Closed
Flash BIOS write protected		W8 Open
Flash BIOS write permitted		W8 Closed
PQFP not installed			W13 Open
PQFP disabled by OD processor	W13 1&2 closed
PQFP manually disabled		W13 2&3 closed
** PQFP=Plastic Quad Flat Pack. This is the soldered on SX processor. 
Factory config do no alter		W15 1&2 closed
Factory config do no alter		W31 Open
Factory config do no alter		W36 Open
VGA IRQ9 disabled			W303 Open
VGA IRQ9 enabled			W303 Closed
Factory config do no alter		Sw1-3 Off
Factory config do no alter		Sw1-4 Off
VPU chip disabled			Sw2-1 On
VPU chip enabled			Sw2-1 Off
Video RAMDAC at snooping mode		Sw2-2 On
Video RAMDAC at normal mode		Sw2-2 Off
VGA BIOS disabled			Sw2-3 On
VGA BIOS enabled			Sw2-3 Off
External speaker disabled		Sw2-4 On
External speaker enabled		Sw4-4 Off

DRAM Configuration

Size	Bank 0		Bank 1		Bank 2		Bank3
1MB	256K x 36
2MB	256K x 36	256K x 36
4MB	1M x 36
6MB	256K x 36	256K x 36	1M x 36
8MB	1M x 36		1M x 36
10MB	256K x 36	256K x 36	1M x 36		1M x 36
12MB	1M x 36		1M x 36		1M x 36
16MB	1M x 36		1M x 36		1M x 36		1M x 36
16MB	4M x 36
18MB	256K x 36	256K x 36	4M x 36
20MB	1M x 36	4M x 36
24MB	1M x 36		1M x36		4M x 36
32MB	4M x 36		4M x 36
40MB	1M x 36		1M x 36		4M x 36		4M x 36
48MB	4M x 36		4M x 36		4M x 36
64MB	4M x 36		4M x 36		4M x 36		4M x 36

Cache Configuration

Size	Bank0		Bank1		Tag
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	(1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

Cache Jumper Configuration

Size	W10	W11	W16	W17	W22	W23	W24
64KB	1&2	1&2	1&2	1&2	2&3	2&3	1&2
128KB	1&2	2&3	1&2	2&3	1&2	1&2	2&3 
256KB	2&3	2&3	2&3	2&3	2&3	2&3	2&3 

CPU configuration

Type			W33
All other CPU's	1-2, 3-4 closed
80486SX		2-3 closed
80486 SX-2		3-4 closed

80486DX4 Configuration

804DX4		W32	W34
Disabled		Open	Open
Enabled		1&2	3&4

CPU speed selection

Speed	Sw1-1	Sw1-2
25Mhz	Off	On
33Mhz	On	On
50iMhz	Off	On 
66iMhz	On	On
75iMhz	Off	On
100iMhz	On	On

DMA Channel Configuration

DMA Channel	W98	W99
Channel 1	1&2	1&2
Channel 2	2&3	2&3

VRAM configuration

Size	Bank 0			Bank1
1MB	(2) 256K x 16 x 60ns	None
2MB	(2) 256K x 16 x 60ns	(2) 256K x 16 x 60ns VRAM