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





COBRA-RT VER. A

ROBOTECH, INC.

COBRA-RT VER. A

Processor

CX486S/80486SX/CX487S/80487SX/80486DX/ODP486SX/80486DX2/ 80486DX4/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

64MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP8

Reset switch

JP15D

Speaker

JP15A

Turbo switch

JP15E

Power LED & keylock

JP15B

+5vDC ground

JP15F

Turbo LED

JP15C

32-bit VESA local bus slots

SL1 - SL3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP8

pins 2 & 3 closed

 

CMOS memory clear

JP8

pins 3 & 4 closed

Power good signal detect from power supply

JP11

pins 1 & 2 closed

 

Power good signal detect from board

JP11

pins 2 & 3 closed

CPU type select 1 CPU on board (PQFP or PGA)

JP12

pins 1 & 2 closed

 

CPU type select 2 CPU on board (PGA enabled PQFP disabled)

JP12

pins 2 & 3 closed

Green PC mode enabled

JP14

pins 2 & 3 closed

 

Green PC mode disabled

JP14

pins 1 & 2 closed

VESA bus address type select asynchronous (40/50mhz CPU)

JP19

pins 1 & 2 closed

 

VESA bus address type select synchronous

JP19

pins 2 & 3 closed

VESA bus data type select synchronous

JP20

pins 1 & 2 closed

 

VESA bus data type select asynchronous

JP20

pins 2 & 3 closed

VGA card select normal

JP28

pins 1 & 2 closed

 

VGA card select Weitek Power 9000 VGA only

JP28

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

NONE

(1) 8K x 8

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 16K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP7

JP9

JP10

32KB

2 & 3

Open

Open

Open

Open

64KB

1 & 2

Open

Open

Closed

Open

128KB

2 & 3

2 & 3

Closed

Closed

Open

256KB

1 & 2

1 & 2

Closed

Closed

2 & 3

256KB

1 & 2

1 & 2

Closed

Closed

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP16

JP17

CX486S

Open

pins 2 & 3 closed

80486SX

Open

pins 2 & 3 closed

80487SX

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

ODP486SX

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

80486DX/DX2/DX4

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

Pentium Overdrive

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

CPU SPEED CONFIGURATION

Speed

JP21

JP22

JP23

JP27

25MHz

Closed

Open

Closed

Open

33MHz

Closed

Closed

Open

Open

40MHz

Open

Open

Closed

Closed

50iMHz

Closed

Open

Closed

Open

50MHz

Open

Closed

Open

Closed

66iMHz

Closed

Closed

Open

Open

VESA BUS CLOCK CONFIGURATION

Setting

JP25 (SL2)

JP26 (SL1)

JP29 (SL3)

Synchronous

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Asynchronous

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AB)

CPU speed

JP19

JP20

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

40MHz

pins 1 & 2 closed

pins 1 & 2 closed

50iMHz

pins 2 & 3 closed

pins 1 & 2 closed

50MHz

pins 1 & 2 closed

pins 1 & 2 closed

66iMHz

pins 2 & 3 closed

pins 1 & 2 closed

CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AC)

CPU speed

JP19

JP20

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

40MHz

pins 1 & 2 closed

pins 2 & 3 closed

50iMHz

pins 2 & 3 closed

pins 1 & 2 closed

50MHz

pins 1 & 2 closed

pins 2 & 3 closed

66iMHz

pins 2 & 3 closed

pins 1 & 2 closed