OCEAN INFORMATION SYSTEMS, INC.

MVGA-1000

Card Type

Video card

Video Chip Set

Unidentified

Maximum Video Memory

1MB DRAM

Video Types Supported

Monochrome, CGA, EGA, VGA

Highest Resolution Supported

1024 x 768

Data Bus

16-bit ISA


CONNECTIONS

Function

Label

Function

Label

15-pin analog video port

  CN1

Feature connector

CN3

9-pin digital video port

  CN2

 

 




USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Data bus autodetect enables

JP2

Pins 2 & 3 Closed

 

Data bus autodetect disables

JP2

Pins 1 & 2 Closed

»

IRQ9 disabled

JP5

Pins 2 & 3 Closed

 

IRQ9 enabled

JP5

Pins 1 & 2 Closed

»

NMI enabled

JP6

Pins 1 & 2 Closed

 

NMI disabled

JP6

Pins 2 & 3 Closed

»

Factory configured - do not alter (TTL port settings)

JP7

Pins 1 & 2 Closed

»

Factory configured - do not alter

SW1/1

On

»

Factory configured - do not alter

SW1/2

On

»

Less than 48KHz horizontal scan rate enabled

SW1/3

On

 

48KHz - 49KHz horizontal scan rate enabled

SW1/3

Off

»

Factory configured - do not alter

SW1/4

On

»

Fast address decode enabled

SW1/5

Off

 

Slow address decode enabled

SW1/5

On

»

16-Bit data path enabled

SW1/6

Off

 

8-Bit data path enabled

SW1/6

On



VIDEO MEMORY CONFIGURATION (DRAM/VRAM)

Size

Bank 0

Bank 1

Bank 2

U1

U7

256KB

(2) 128KB

None

None

Installed

Blank

512KB

(2) 128KB

(2) 128KB

None

Installed

Blank

1024KB

(2) 128KB

(2) 128KB

(4) 128KB

Blank

Installed



VIDEO MEMORY JUMPER CONFIGURATION

Size

JP1

JP3

JP4

256KB

2 & 3

1 & 3, 2 & 4

1 & 2

512KB

2 & 3

1 & 2, 3 & 4

2 & 3

1024KB

1 & 2

3 & 5, 4 & 6

2 & 3

Note: Pins designated should be in the closed position



MISCELLANEOUS TECHNICAL NOTES

SW 1/3 is used for 512KB and 1024KB configurations only