MICROFIELD GRAPHICS, INC.
T8
Category | Video |
Video Types Supported | 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 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. | ||||
VIDEO FREQUENCY CONFIGURATION | |||||
Frequency | Mode | S1 | S2 | S7 | |
| » | 1280 x 1024 | Non-interlaced | Pins 1 & 2 closed | Pins 1 & 2 closed | Open |
1280 x 1024 | Interlaced | Pins 1 & 2 closed | Pins 2 & 3 closed | Open | |
1280 x 1024* | Non-interlaced | Pins 1 & 2 closed | Pins 1 & 2 closed | Closed | |
1024 x 768* | Non-interlaced | Pins 2 & 3 closed | Pins 2 & 3 closed | Closed | |
Note: * This is an alternate setting which requires an optional dual crystal and 512K microcode EPROM. | |||||
ALTERNATE I/O PORT ADDRESS SELECTION | ||
Address | S6 | |
| » | 3xx | Pins 2 & 3 closed |
1xx | Pins 1 &2 closed | |
DMA CHANNEL SELECTION | ||||
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 SELECTION | ||
IRQ | S3 | |
| » | 2/9 | Pins 1 & 2 closed |
10 | Pins 3 & 4 closed | |
11 | Pins 5 & 6 closed | |
12 | Pins 7 & 8 closed | |
Disabled | Pins 9 & 10 closed | |