minuszerodegrees.net IBM EGA Technical Reference Misc (3C2/3DA) 3C2: Misc Output 3C2: Input Status 0 3DA: Feature Control 3DA: Input Status 1 Sequencer (3C4/3C5) 00: Reset 01: Clocking Mode 02: Map Mask 03: Char Map Select 04: Memory Mode CRTC (3D4/3D5) 00: Horz Total 01: Horz Disp End 02: Horz Blank Start 03: Horz Blank End 04: Horz Retrace Start 05: Horz Retrace End 06: Vert Total 07: CRTC Overflow 08: Preset Row Scan 09: Max Scan Line 0A: Cursor Start 0B: Cursor End 0C: Start Addr Hi 0D: Start Addr Lo 0E: Cursor Addr Hi 0F: Cursor Addr Lo 10: Vert Retrace Start 10: Light Pen Hi 11: Vert Retrace End 11: Light Pen Lo 12: Vert Disp End 13: Offset 14: Underline 15: Vert Blank Start 16: Vert Blank End 17: Mode Control 18: Lone Compare Graphics (3CE/3CF) 00: Set/Reset 01: Enable Set/Reset 02: Color Compare 03: Data Rotate 04: Read Map Select 05: Mode 06: Miscellaneous 07: Color Don't Care 08: Bit Mask Attributes (3C0) 00: Address 00-0F: Palette 10: Mode Control 11: Overscan Color 12: Color Planes 13: Horz Panning BIOS BIOS Listing