ocr: Internal Operation All internal timing cperations are based on the horizontal dot counter. Particular events occur in response to certain counts of both the horizontal position register and the vertical line register. HORIZONTAL DECODES HORIZONTA COONT Horizontal Sync Start 358 Stop 399 Horizontal Equilization Pulse 1 Start 152 Stop 179 Pulse 2 Start 380 Stcp 398 Horizontal Blanking Start 344 Stop 415 Burst Start 384 Stop 408 Character Window Start 432 Stop 296 External Fetch Window Start 409 Stop 288 Refresh Single Ciock Start 288 Stop 328 Character Window Single Clock Start 432 Stop 296 40 C ...
