EGA/CGA Graphics Adapter (250-3048A) Settings Faxback Doc. # 2114 Note: refer to Faxback Doc. # 2154 for Board Layout. ──────────────────────────────────────────────────────────────────── Enhanced Monochrome Color Color Display Display Display (TTL) (RGB) (ECD) ──────────────────────────────────────────────────────────────────── Horizontal Scan Rate 18.432kHz 15.750kHz 21.850kHz Vertial Scan Rate 50Hz 60Hz 60Hz Video Band Width 16.275MHz 14.318MHz 16.257MHz Maximum Resolution 720X350 640X200 640X350 ─────────────────────────────────────────────────────────────────── Note: Up = OFF Down = ON ┌─────────────────────────────────────────────────────┐ │Dip Switch Settings │ ├─────────────────────────────────────────────────────┤ │ -- SW1 Switch Setting -- │ ├─────────────────────────────────────────────────────┤ │Monitor 1 2 3 4 │ ├─────────────────────────────────────────────────────┤ │RGB 40 x 25 ON OFF OFF ON │ │RGB 80 x 25 OFF OFF OFF ON │ │ECD Hi Res OFF ON ON OFF │ │ECD Lo Res ON ON ON OFF │ │Monochrome OFF OFF ON OFF │ └─────────────────────────────────────────────────────┘ ┌─────────────────────────────────────────────────────┐ │Power On Mode -- SW1 Switch Setting -- │ ├─────────────────────────────────────────────────────┤ │Power On Monitor 5 6 7&8 │ │Mode Type │ ├─────────────────────────────────────────────────────┤ │EGA All ON ON OFF │ │MDA/HERC ECD/Mono OFF ON OFF │ │CGA ECD/RGB ON OFF OFF │ └─────────────────────────────────────────────────────┘ ┌──────────────────────────────────────────────────────────┐ │Jumper Settings │ ├──────────────────────────────────────────────────────────┤ │Jumper Jumper Pins Setting Environment │ ├──────────────────────────────────────────────────────────┤ │P1 1 & 2 * ECD monitor attached │ │P1 2 & 3 RGB or mono attached │ │P3 1 & 2 * Normal Operation │ │P3 2 & 3 Select port 2 │ │P3 4 & 5 When NOT using Automode│ │P3 5 & 6 * When using Automode │ │P3 7 & 8 When using slot 8 (PC) │ │P3 8 & 9 * When NOT using slot 8 │ │P3 10 & 11 * When using Automode │ │P3 11 & 12 When NOT using Automode│ └──────────────────────────────────────────────────────────┘ * Indicates factory settings If your are using one monitor: (One monitor connected to the Tandy EGA/CGA adapter) make the following settings: SW1 Switch Setting: Monitor 1 2 3 4 RGB 40 X 25 on off off on RGB 80 X 25 off off off on ECD Hi Resolution off on on off ECD Low Resolution on on on off Monochrome off off on off If you use two monitors: (Primary monitor connected to Tandy EGA/CGA adapter; secondary monitor connected to CGA or Monochrome adapter) Primary SW1 Switch Setting Secondary Monitor 1 2 3 4 Monitor ECD Hi Resolution off on on off Monochrome ECD Low Resolution on on on off Monochrome RGB 80 X 25 off off off on Monochrome RGB 40 X 25 on off off on Monochrome Monochrome off off on off RGB 80 X 25 Monochrome on off on off RGB 40 X 25 If you use two monitors: (Secondary monitor connected to Tandy EGA/CGA adapter; Primary monitor connected to CGA or Monochrome adapter) Primary SW1 Switch Setting Secondary Monitor 1 2 3 4 Monitor RGB 80 X 25 off on off on Monochrome RGB 40 X 25 on on off on Monochrome Monochrome off off on on ECD Hi Resolution Monochrome on off on on ECD Low Resolution Monochrome off on on on RGB 80 X 25 Monochrome on on on on RGB 40 X 25 Mode: Power On Monitor Type Switch Settings 5 6 EGA All on on MDA/HERC ECD/Monochrome off on CGA ECD/RGB on off Switch/Setting 7 8 Reserved for future use off off