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T8
MICROFIELD GRAPHICS, INC.
T8
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Category
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Video
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Video Types Supported
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XVGA
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Video Processor
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Trident
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Highest Resolution Supported
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1280 x 1024
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Data Bus Type
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16-bit ISA
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Memory Type
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VRAM
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Maximum Onboard Memory
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2048KB
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CONNECTIONS
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Purpose
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Location
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15-pin video port
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J1
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EMULATION TYPE CONFIGURATION
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Type
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Address
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JP1
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JP1A
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VGA/EGA with High Resolution
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3DDh - 3DEh
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Pins 1 &2 closed
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Pins 1 &2 closed
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CGA with High Resolution
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3DDh - 3DEh
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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High resolution
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3DDh - 3DEh
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Pins 1 &2 closed
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Pins 2 & 3 closed
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High resolution
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30Dh - 30Eh
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Pins 2 & 3 closed
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Pins 1 &2 closed
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Note: Address setting 30Dh - 30Eh requires special device driver software for operation.
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VIDEO FREQUENCY CONFIGURATION
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Frequency
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Mode
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S1
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S2
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S7
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1280 x 1024
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Non-interlaced
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Open
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1280 x 1024
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Interlaced
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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Open
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1280 x 1024*
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Non-interlaced
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Closed
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1024 x 768*
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Non-interlaced
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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Closed
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Note: * This is an alternate setting which requires an optional dual crystal and 512K microcode EPROM.
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ALTERNATE I/O PORT ADDRESS SELECTION
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Address
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S6
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3xx
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Pins 2 & 3 closed
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1xx
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Pins 1 &2 closed
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DMA CHANNEL SELECTION
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DRQ
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Dack
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S5
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S8
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7
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7
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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6
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6
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Pins 3 & 4 closed
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Pins 3 & 4 closed
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5
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5
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Pins 5 & 6 closed
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Pins 5 & 6 closed
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VIDEO INTERRUPT SELECTION
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IRQ
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S3
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2/9
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Pins 1 & 2 closed
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10
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Pins 3 & 4 closed
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11
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Pins 5 & 6 closed
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12
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Pins 7 & 8 closed
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Disabled
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Pins 9 & 10 closed
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