T8900DIP.TXT - Jeffrey E. Hundstad (j3gum@vax1.mankato.msus.edu)                       Switch Settings on the Trident 8900C  ----------------------------------\         /-----------------| |                                  ---------                  | |                                        9                ----| | xx 8  8  8  8    -------                   -------      | 1 | xx               |  6  |                   |  10 |      |---| |                  |     |  4                -------      | 2 | xx               ------ j1 j2                           |---| | xx 8  8  8  8    -------       --------                 | 3 |                  |   5 |       |   5  |                 |---| |--------------|   ------- |-|   --------    7   |-|          |                |-----------| |-------------------| |-----------                    VGA Graphics Adapter Layout #1 (8-DRAM)  ----------------------------------\         /-----------------| |                                  ---------      4 j3        | |                  -------               9                ----| | 11 8  8  8  8    |     |                  --------      | 1 |                  |  6  |                  |   10 |      |---| |                  -------  4     -------   --------      | 2 |                          j2     |  5   |                |---| | 11 8  8  8  8                   -------                 | 3 |                                 |  5   |           4 j1 |---| |--------------|           |-|    --------   7   |-|          |                |-----------| |-------------------| |-----------                 VGA Graphics Adapter Layout #2 (2/4/8 - DRAM)  ----------------------------------\         /-----------------| |                                  ---------        4 j3      | |                  -------               9                ----| | 11 8  8  8  8    |     |                  --------      | 1 |                  |  6  |         -------  |   10  |     |---| |                  -------     4   |  5  |  --------      | 2 |                              j2  -------                |---| | 11 8  8  8  8                    |  5  |                | 3 |                    4 j3          -------                |---| |--------------|           |-|                   |-|   4 j1   |                |-----------| |-------------------| |-----------                 VGA GRaphics Adapter Layout #3 (2/4/8 - DRAM)  1.  Dip Switches 2.  DB-15 connector: For analog monitors. 3.  DB-9 connector: for TTL monitors. (* NOTE #1) 4.  Jumers J1, J2, J3, J4 (J3 for layouts #2 and #3, J4 for layout #3) 5.  Video BIOS: Basic Input/Ouput System. 6.  TVGA 8900 Chip: VGA GRaphics chip. 7.  Edge connector: For IBM PC/XT, PC/AT and compatible systems. 8.  Video DRAM: up to 1MB 9.  Feature connector: For special applications. 10. Video DAC 11. Jumper Blocks JP1 and JP2 (2/4/8 board only) * NOTE #1 - Hardware option.  Feature not present for all board versions.  Switch settings for the 6 switch dip box (#1 from figures).  Switch 3:  Scan Rate   On  - Less than 48KHz (default)   Off - 38-49Khz  Switch 5:  Fast and Slow Address Decode   Off - Fast address decode (default)   On  - Slow address decode  Switch 6:  8/16 bit Data Path   Off - 16-bit data path (default)   On  - 8-bit data path   Jumper settings  J1:  Settings for IRQ9  1 2 3     1 2 3    xxx     xxx  Off (def)   On  J2:  Settings for Bus Size Detections 1           1 x 2 x         2 x 3 x         3 Autodetect  Standard Interface (def)  J3:  Settings for DRAM Configuration    1  2  3       1  2  3       1  2  3    ----          |  |             ----    ----          |  |             ----    4  5  6       4  5  6       4  5  6      Two DRAM      Four DRAM      Eight DRAM  J4:  DRAM Clock Select  1 2 3     1 2 3    xxx     xxx  40 MHz    48 MHz Two DRAM   4/8 DRAM   SW1 & SW2