6845 CRT Controller. +--------------+ GND |1 +--+ 40| VSYNC /RST |2 39| HSYNC LPSTB |3 38| RA0 MA0 |4 37| RA1 MA1 |5 36| RA2 MA2 |6 35| RA3 MA3 |7 34| RA4 MA4 |8 33| D0 MA5 |9 32| D1 MA6 |10 6845 31| D2 MA7 |11 CRTC 30| D3 MA8 |12 29| D4 MA9 |13 28| D5 MA10 |14 27| D6 MA11 |15 26| D7 MA12 |16 25| /CE MA13 |17 24| A0 DISPEN |18 23| IORQ CURSOR |19 22| R/W VCC |20 21| CLK +--------------+ [This information is part of the GIICM]