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Revision 12 (current)
Edited by feos on 5/5/2024 1:38 PM
Based on
* https://pineight.com/mw/index.php?title=Dot_clock_rates
* https://pineight.com/mw/page/50_Hz_dot_clock_rates.xhtml
|| Frequency || Exact frequency || PAR || Exact PAR || Devices ||
| 1.02 MHz | 315/308 MHz | 1.500 | 3:2 | Apple II (GR; each line repeated four times)
| 3.58 MHz | 315/88 MHz | 1.714 | 12:7 | Devices with 1 pixel per NTSC subcarrier period: %%% Atari 2600 %%% Atari 7800 %%% Intellivision
| 5.37 MHz | 945/176 MHz | 1.143 | 8:7 | The 256px display of the [https://en.wikipedia.org/wiki/Texas_Instruments_TMS9918|TMS9918] %%% TI-99/4A %%% ColecoVision %%% MSX %%% SG-1000 %%% MSX2 %%% Master System %%% Genesis %%% Game Gear %%% NES %%% TurboGrafx-16 %%% Super NES %%% 256px mode of the original PlayStation
| 6.09 MHz | 1071/176 MHz | 1.008 | 120:119 | Nintendo 64 (320px)
|| 6.14 MHz || 135/22 MHz ||1.000 || 1:1 || Rec. 601 defines the NTSC picture such that this is square on 4:3 monitors
| 6.71 MHz | 4725/704 MHz | 0.914 | 32:35 | 320px mode of: %%% Sega Genesis %%% PlayStation
| 7.094 MHz|709379/100000 MHz| 1.03964 | 737500:709379 | Amiga (PAL)
| 7.16 MHz | 315/44 MHz | 0.857 | 6:7 | Apple II (40-column text, HGR 280px) %%% TG16 (mid-res, up to 352px) %%% Atari 7800 (hi-res, 320px) %%% Amiga %%% IBM CGA (40-column or 320px) and EGA in 200-line mode (40-column or 320px) %%% Atari 800
|| 7.375 MHz|| 59/8 MHz || 1.000 || 1:1 || Rec. 601 defines the PAL picture such that this is square on 4:3 monitors
| 7.67 MHz | 4725/616 MHz | 0.800 | 4:5 | PlayStation (384px)
| 8.19 MHz | 630/77 MHz | 0.750 | 3:4 | Commodore 64 %%% Apple IIGS 4bpp super hi-res %%% (both 320px). Square on widescreen monitors.
| 10.74 MHz | 945/88 MHz | 0.571 | 4:7 | Twice the TMS9918 pixel rate produces 512px on %%% Super NES %%% TG16 %%% PlayStation
| 13.42 MHz | 4725/352 MHz | 0.457 | 16:35 | PlayStation (640px)
||13.5 MHz || 27/2 MHz ||0.909 || 10:11 ||Rec. 601 NTSC
||13.5 MHz || 27/2 MHz ||1.093 || 59:54 ||Rec. 601 PAL
| 14.32 MHz | 315/22 MHz | 0.429 | 3:7 | Apple II (80-column text, double hi-res) %%% Amiga %%% IBM CGA (80-column)
| 16.36 MHz | 1260/77 MHz | 0.375 | 3:8 | Apple IIGS 2bpp super hi-res (640px)