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M4PI

MICRONICS COMPUTERS, INC.

M4PI

Processor

80486SX/SL80486SX/80486DX/SL80486DX/80486DX2/SL80486DX2/ 80486DX4/Pentium Overdrive

Processor Speed

25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

Intel

Max. Onboard DRAM

128MB

Cache

128/256KB

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard connector

J8

IDE interface LED

J54

Serial port 1

J18

Reset switch

J55

Serial port 2

J21

Speaker

J56

Parallel port

J22

Power LED & keylock

J57

IDE interface (ISA)

J38

IDE interface (PCI)

J81

Floppy drive interface

J39

32-bit PCI slots

PC1 - PC3

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

PCI IDE IRQ select IRQ14

J19

pins 1 & 2 closed

 

PCI IDE IRQ select IRQ15

J19

pins 2 & 3 closed

»

Factory configured - do not alter

J20

N/A

»

Factory configured - do not alter

J66

Open

»

Factory configured - do not alter

J67

N/A

»

Parallel port ECP mode enabled

J76

Open

 

Parallel port ECP mode disabled

J76

Closed

»

Factory configured - do not alter

J80

N/A

»

Flash BIOS write protect disabled

SW1/4

On

 

Flash BIOS write protect enabled

SW1/4

Off

»

PCI card installed

SW1/5

On

 

PCI card not installed

SW1/5

Off

»

On board mouse enabled (uses IRQ12)

SW1/8

On

 

On board mouse disabled

SW1/8

Off

»

Factory configured - do not alter

W1

N/A

»

Factory configured - do not alter

W5

N/A

»

Parallel port IRQ select IRQ5

W8

pins 2 & 3 closed

 

Parallel port IRQ select IRQ7

W8

pins 1 & 2 closed

»

Flash BIOS mode select normal

W10

pins 2 & 3 closed

 

Flash BIOS mode select recovery

W10

pins 1 & 2 closed

»

PCI IDE chip enabled

W12

Closed

 

PCI IDE chip disabled

W12

Open

»

ISA IDE IRQ select IRQ14

W13

pins 1 & 2 closed

 

ISA IDE IRQ select IRQ15

W13

pins 2 & 3 closed

Note: The location of J19 is unidentified.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 2M x 36

(1) 2M x 36

NONE

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

24MB

(1) 2M x 36

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

40MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

48MB

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 8M x 36

NONE

NONE

72MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

72MB

(1) 8M x 36

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

80MB

(1) 2M x 36

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

80MB

(1) 8M x 36

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

96MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

128KB

(4) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J52

J58

128KB

pins 2 & 3 closed

Open

256KB

pins 1 & 2 closed

Closed

CPU TYPE CONFIGURATION

Type

j59

j71

j73

j74

80486SX

Closed

2 & 3

2 & 3

Open

SL80486SX

Closed

2 & 3

1 & 2, 3 & 4

Closed

80486DX

Closed

1 & 2, 3 & 4

2 & 3

Open

SL80486DX

Closed

1 & 2, 3 & 4

1 & 2, 3 & 4

Closed

80486DX2

Closed

1 & 2, 3 & 4

2 & 3

Open

SL80486DX2

Closed

1 & 2, 3 & 4

1 & 2, 3 & 4

Closed

80486DX4

Closed

1 & 2, 3 & 4

1 & 2, 3 & 4

Closed

P24T

Open

1 & 2, 3 & 4

1 & 2, 3 & 4

Closed

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

SW1/6

SW1/7

25MHz

On

On

33MHz

Off

On

50iMHz

On

Off

66iMHz

Off

On

75iMHz

On

On

100iMHz

Off

On

DMA CONFIGURATION

DMA

W6

W7

DMA1

pins 1 & 2 closed

pins 1 & 2 closed

DMA3

pins 2 & 3 closed

pins 2 & 3 closed

PCI IRQ CONFIGURATION

IRQ

SW1/1

SW1/2

SW/3

IRQ5

On

On

Off

IRQ11

On

Off

On

IRQ15

Off

On

On