NTSC | PAL | PAL-M | SECAM
| |
| TIA Clock Speed | 3579545 Hz | 3546894 Hz | 3575611 Hz | 3562500 Hz
|
| CPU Clock Speed | 1193182 Hz | 1182298 Hz | 1191870 Hz | 1187500 Hz |
The CPU clock is derived from the TIA clock by a divide-by-3 circuit.
There are 228 TIA clock cycles per TV scanline. 68 of these are horizontal blank, and 160 are visible pixels.