MICROFIELD GRAPHICS, INC.
T8C
|
Category |
Video |
|
Video Types Supported |
CGA/EGA/VGA/XVGA |
|
Video Processor |
Trident |
|
Highest Resolution Supported |
1280 x 1024 |
|
Data Bus Type |
16-bit ISA |
|
Memory Type |
VRAM |
|
Maximum Onboard Memory |
2048KB |
|
CONNECTIONS | |
|
Purpose |
Location |
|
15-pin analog video port |
J1 |
|
EMULATION TYPE CONFIGURATION | ||||
|
Type |
Address |
JP1 |
JP1A | |
|
VGA/EGA with High Resolution |
3DDh - 3DEh |
Pins 1 &2 closed |
Pins 1 & 2 closed | |
|
CGA with High Resolution |
3DDh - 3DEh |
Pins 2 & 3 closed |
Pins 2 & 3 closed | |
|
High resolution |
3DDh - 3DEh |
Pins 1 & 2 closed |
Pins 2 & 3 closed | |
|
High resolution |
30Dh - 30Eh |
Pins 2 & 3 closed |
Pins 1 & 2 closed | |
|
Note:Address setting 30Dh - 30Eh requires special device driver software for operation. | ||||
|
ALTERNATE I/O PORT ADDRESS | ||
|
Address |
S6 | |
|
3xx |
Pins 1 & 2 closed | |
|
1xx |
Pins 2 & 3 closed | |
|
BIOS SIZE SELECT | |
|
Size |
J10 |
|
16KB |
Pins 1 & 2 closed |
|
32KB |
Pins 2 & 3 closed |
|
VIDEO FREQUENCY SETTINGS | ||||
|
Frequency |
Mode |
S1 |
S2 |
S7 |
|
1280 x 1024 |
Non-interlaced |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Open |
|
1280 x 1024 |
Interlaced |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Open |
|
1280 x 1024 |
Non-interlaced |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Closed |
|
1024 x 768 |
Non-interlaced |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Closed |
|
Note: The last two settings require an optional dual crystal and 512KB microcode EPROM. | ||||
|
DMA CHANNEL SELECT | ||||
|
DRQ |
Dack |
S5 |
S8 | |
|
7 |
7 |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
6 |
6 |
Pins 3 & 4 closed |
Pins 3 & 4 closed | |
|
5 |
5 |
Pins 5 & 6 closed |
Pins 5 & 6 closed | |
|
VIDEO INTERRUPT SELECT | ||
|
IRQ |
S3 | |
|
IRQ10 |
Pins 3 & 4 closed | |
|
IRQ9 |
Pins 1 & 2 closed | |
|
IRQ11 |
Pins 5 & 6 closed | |
|
IRQ12 |
Pins 7 & 8 closed | |
|
Disabled |
Pins 9 & 10 closed | |
|
MONITOR CONNECTOR SENSE | |||
|
Connector Sense |
J8 |
J9 | |
|
Disabled |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
Enabled |
Pins 2 & 3 closed |
Pins 2 & 3 closed | |
|
Note: An optional microcode EPROM must be installed before Connector Sense can be enabled. | |||