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8900 VGA MASTER (FOUR LAYER)
UNIDENTIFED
8900 VGA MASTER (FOUR LAYER)
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Card Type
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Video card
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Video Chip Set
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Unidentified
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Maximum Video Memory
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8MB DRAM
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Video Types Supported
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MGA, CGA, EGA, VGA
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Highest Resolution Supported
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1024 x 768
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Data Bus
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16-bit ISA
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CONNECTIONS
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Function
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Label
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Function
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Label
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15-pin analog video port
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CN1
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Feature connector
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CN2
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USER CONFIGURABLE SETTINGS
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Function
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Label
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Position
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DRAM clock at 40 MHz (2 DRAM)
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JP1
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Pins 2 & 3 closed
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DRAM clock at 48 MHz (4/8 DRAM)
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JP1
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Pins 1 & 2 closed
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Factory configured - do not alter
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SW1/1
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On
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Factory configured - do not alter
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SW1/2
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On
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Less than 48KHz scan rate
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SW1/3
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On
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48-49KHz scan rate
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SW1/3
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Off
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Factory configured - do not alter
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SW1/4
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On
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Fast address decode
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SW1/5
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Off
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Slow address decode
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SW1/5
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On
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16 bit data path
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SW1/6
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Off
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8 bit data path
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SW1/6
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On
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DRAM JUMPER CONFIGURATION
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Size
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JP3
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JJ1/A
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JJ1/B
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JJ1/C
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JJ1/D
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2MB
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Pins 1 & 2, 4 & 5
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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4MB
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Pins 1 & 4, 2 & 5
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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8MB
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Pins 2 & 3, 5 & 6
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Pins 2 & 3
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Pins 2 & 3
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Pins 2 & 3
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Pins 2 & 3
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Note:
Pins indentified are in the closed position
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DRAM JUMPER CONFIGURATION
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Size
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JJ1/E
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JJ1/F
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JJ1/G
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JJ1/H
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JJ1/I
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2MB
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Pins 1 & 2, 4 & 5
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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4MB
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Pins 1 & 4, 2 & 5
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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Pins 1 & 2
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8MB
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Pins 2 & 3, 5 & 6
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Pins 2 & 3
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Pins 2 & 3
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Pins 2 & 3
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Pins 2 & 3
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Note:
Pins indentified are in the closed position
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BUS SIZE SELECTION
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Setting
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JP4
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Autodetect
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Pins 2 & 3 closed
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Standard interface
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Pins 1 & 2 closed
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IRQ INTERRUPT SELECTION
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Setting
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J2
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IRQ9 disabled
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Pins 2 & 3 closed
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IRQ9 enabled
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Pins 1 & 2 closed
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