ocr: PIN DESCRIPTION CPU INTERFACE DO-D7 Bidirectional Data Bus interface to the CPU. CS Chip Select input (active high). CS* Chip Select input (active low). RS Register select input. A high allows reads and writes of the selected data register. A low allows reads of the Status Register and writes of the Address Register. RW Read/write input to control DO-D7 data direction. A high allows the CPU to read data supplied by the CRT Controller. A low allows the CRT Controller to accept data written by the CPU. INTR Interrupt request output. An open-drain output that is driven low when the Update Ready s ...
