![]() Sega Hang-On/ Space Harrier, OutRun, and System 16B hardware (all 320px) divide a VGA crystal by 4. The exact frequency is 6.13(63) MHz.Ĥ8000 kHz (DAT and DVD audio rate) * 128 approximates square pixels to within 1 part in 800 Irem M52 ( Moon Patrol) (240px) Namco Pac-Man / Galaxian hardware and derivatives such as Pengo (288px) Namco Super Pac-Man family, System 86, 1, 2, and ND-1 (all 288px) Konami GX400 arcade hardware (Gradius, Salamander, and a few others) (256px) 601 defines the NTSC picture such that this is square on 4:3 monitors. Nintendo DS (256px) is the ~33.5 MHz (apparently 2 25 Hz) master clock divided by 6 ĭata East Lock'n Chase/ BurgerTime family (240 or 256px), DECO Cassette System (256px), and BreakThru family (240px) Technos Double Dragon hardware, SNK pre-Neo Geo 68000-based hardware, Taito Arkanoid and Bubble Bobble hardware, Jaleco Mega System 1-A (all 256px) Konami GX and pre-GX ( Mystic Warriors) family (288px) Neo Geo MVS (320px) The 256px display of the TMS9918 (TI-99/4A, ColecoVision, MSX, and SG-1000), its descendants (MSX2, Master System, Genesis, Game Gear ), and other VDPs inspired by it (NES, TurboGrafx-16, Super NES), and 256px mode of the original PlayStation Sets of the 240p era were built for 4:3 display aspect ratio, as opposed to the 16:9 aspect ratio that became common between the late 1990s and mid-2000s multiply the pixel aspect ratios by 4/3 if stretching the picture on a widescreen TV.Įxact frequencies and PARs are given in lowest terms frequencies of crystal oscillators and the dividers applied to them should be mentioned in a footnote or the description of a specific device.Īpple II (GR each line repeated four times)ĭevices with 1 pixel per NTSC subcarrier period: Atari 2600, Atari 7800, IntellivisionĪtari Missile Command and Crystal Castles hardware, Stern Berzerk/ Frenzy hardware (all 256px). ![]() Interlaced video makes pixels half as tall as in 240p, doubling the pixel aspect ratio, and ratios assuming interlace are marked as such. Some devices also support 480i (interlaced) video, where even scanlines are drawn in one field and odd scanlines are drawn in the other field.An arcade-to-television adapter would produce the pixel aspect ratio listed below. Some coin-operated machines use a different active scanline period, and the arcade operator is expected to adjust the monitor's picture size to match a test pattern displayed in a particular game's service mode.601, is also given.Ī few things may cause this ratio to differ in a particular environment: The pixel aspect ratio that each rate produces, assuming the 480-line picture and 52.148 microsecond active scanline period of Rec. The following frequencies are the dot clock rates of digital picture generators outputting 240p low-definition video signals that are compatible with NTSC monitors or otherwise at near- System M scan rates (15.7 kHz horizontal, 60 Hz vertical). Most information is referenced to MAME's source code or other sources that are not necessarily reliable. This list is not intended as a citeable source.
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