ocr: Barrel Shifter Function Start Address GR3, b3,4 CRTC reg C&D CPU Write msb CPU Read CPU Write 7 ALU = Data DO-7 lsb 2 N/AO I None, ANDH Bit Display Ep OR, XOR *00- Mask Memory Latch GR8 E Data GR3, Rotate 60-3 I - >e Address- 16t I I SeT/Reser 0 I 8 GRO, 60-3 Enable Set/Reset 0- GR1, 60-3 Hrite Mode - - - H CPU Read GR5, 60,1 Plane 1L Latch Data D0-7 EGA Functional Diagram Plane 2 Latch by Bob. Orlando, Montgomery Florida Plane 3 Latchi 12-1-87 8 8 : Color. Compare 0 - GR2, b0-3 8 *Color Don't Care D3 - - *=>Extend bit to byte. GR7, 60-3 Data Data from from Plane Plane 1 3 . . 8 8 8 GR4, Read ...
