...because we can't all be on the bleeding edge...





TWISTER AT (REV. 1B)

MICRONICS COMPUTERS, INC.

TWISTER AT (REV. 1B)

Device Type

Mainboard

Processor

CX 6x86/AM K5/AM K6/Pentium

Processor Speed

75/90/100/120/133/150/166/180/200/233MHz

Chip Set

Intel 430TX

Video Chip Set

None

Maximum Onboard Memory

256MB (EDO & SDRAM supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

32-bit PCI slots (5), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connectors (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

USB connector 1

J10

Green PC connector

J23/pins 3 & 4

USB connector 2

J11

IR connector

J23/pins 6 - 10

IDE interface 2

J13

IDE interface LED

J23/pins 13 - 16

Serial port 2

J14

Power LED

J23/pins 18 - 20

IDE interface 1

J15

Reset switch

J23/pins 22 & 23

Floppy drive interface

J16

Speaker

J23/pins 24 - 27

Parallel port

J17

Power LED & keylock

J24

Chassis fan power

J18

SCSI interface LED

J101

PS/2 mouse interface

J19

32-bit PCI slots

PC1 - PC5

Serial port 1

J22

 

 

USER CONFIGURABLE SETTINGS

Function

Label

Position

?

CMOS memory normal operation

JP1

Pins 1 & 2 closed

CMOS memory clear

JP1

Pins 2 & 3 closed

Flash BIOS normal operation

JP2

Pins 2 & 3 closed

Flash BIOS reserved

JP2

Pins 1 & 2 closed

SIMM CONFIGURATION

Size

Bank 0

Bank 1

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) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

128MB

(2) 16M x 36

None

136MB

(2) 16M x 36

(2) 1M x 36

144MB

(2) 16M x 36

(2) 2M x 36

160MB

(2) 16M x 36

(2) 4M x 36

192MB

(2) 16M x 36

(2) 8M x 36

256MB

(2) 16M x 36

(2) 16M x 36

Note: Board accepts EDO & SDRAM memory..

DIMM CONFIGURATION

Size

Bank 2

Bank 3

8MB

(1) 1M x 64

None

16MB

(1) 2M x 64

None

16MB

(1) 1M x 64

(1) 1M x 64

24MB

(1) 2M x 64

(1) 1M x 64

32MB

(1) 4M x 64

None

32MB

(1) 2M x 64

(1) 2M x 64

40MB

(1) 1M x 64

(1) 4M x 64

48MB

(1) 2M x 64

(1) 4M x 64

64MB

(1) 8M x 64

None

64MB

(1) 4M x 64

(1) 4M x 64

72MB

(1) 1M x 64

(1) 8M x 64

80MB

(1) 2M x 64

(1) 8M x 64

96MB

(1) 4M x 64

(1) 8M x 64

128MB

(1) 8M x 64

(1) 8M x 64

256MB

(1) 16M x 64

(1) 16M x 64

Note: Board accepts EDO & SDRAM memory. Banks 2 & 3 are interchangeable.

CACHE CONFIGURATION

Size

Bank 0

256KB

(2) 32K x 32

512KB

(2) 64K x 32

Note: The location of the cache is unidentified.

CPU SPEED SELECTION (CYRIX)

CPU speed

Clock speed

Multiplier

JP4

JP5

JP6

JP7

JP8

JP60

150MHz

50MHz

2x

1 & 2

2 & 3

2 & 3

2 & 3

1 & 2

Open

166MHz

60MHz

2x

1 & 2

2 & 3

2 & 3

1 & 2

2 & 3

Open

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD K5)

CPU speed

Clock speed

Multiplier

JP4

JP5

JP6

JP7

JP8

JP60

75MHz

50MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

Open

90MHz

60MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

Open

120MHz

60MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

Open

133MHz

66MHz

2x

1 & 2

2 & 3

2 & 3

1 & 2

2 & 3

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

Open

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD K6)

CPU speed

Clock speed

Multiplier

JP4

JP5

JP6

JP7

JP8

JP60

166MHz

66MHz

2.5x

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

Open

200MHz

66MHz

3x

2 & 3

1 & 2

2 & 3

1 & 2

2 & 3

Open

233MHz

66MHz

3.5x

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP4

JP5

JP6

JP7

JP8

JP60

75MHz

50MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

Open

90MHz

60MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

Open

120MHz

60MHz

2x

1 & 2

2 & 3

2 & 3

2 & 3

1 & 2

Open

133MHz

66MHz

2x

1 & 2

2 & 3

2 & 3

1 & 2

2 & 3

Open

150MHz

60MHz

2.5x

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

Open

180MHz

60MHz

3x

2 & 3

1 & 2

2 & 3

2 & 3

1 & 2

Open

200MHz

66MHz

3x

2 & 3

1 & 2

2 & 3

1 & 2

2 & 3

Open

233MHz

66MHz

3.5x

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

Open

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JP11

JP12

JP13

JP14

JP16

JP17

JP18

JP19

CX6X86

Open

Closed

Open

Open

Open

Closed

Open

Open

CX6X86L

Open

Open

Open

Closed

Open

Closed

Open

Open

AM K5

Open

Open

Closed

Open

Open

Closed

Open

Open

AM K6

Open

Open

Open

Closed

Open

Closed

Open

Open

AM K6 233MHz

Closed

Open

Open

Open

Open

Closed

Open

Open

P54C

Open

Closed

Open

Open

Open

Closed

Open

Open

P54CS

Open

Closed

Open

Open

Open

Closed

Open

Open

P54CTB

Open

Closed

Open

Open

Open

Closed

Open

Open

P55C

Open

Open

Open

Closed

Open

Closed

Open

Open