ocr: PIN 1-7/39 DBO-DB7 Processor data bus connections. Bidirec- ASSIGNMENT tional data. 8 IRQ Interrupt output. Generates a interrupt signal to the processor indicating service DB6 1 40 EVCC is needed. The light pen input can be DB5 2 39 EDB7 acknowledged thru use of this interrupt. DB4 3 38 EDB8 10 CS Chip select input. A low signal selects the DB2 DB3 4 5 6 37 36 35 EDB9 EDB11 EDB10 11 12 BA R/W VIC Bus indicates Processor 11. available the read/write VIC output. 11 A chip low connection. wants pulse controls output DB1 DBO 7 34 A10 of the processor network to process IRQ 8 33 FA9 faster videa o ...
