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Amstrad PC

374 bytes added, 12 May
/* The video displays */
[[File:Prince of persia vga ega cga hercules.png]]
The major kind of display from this During that era had (late 1980s to get early 1990s), different graphics standards typically required their own specific monitors, and those which were quite expensive. Each graphics standard had particular signal timing and connector requirements: *CGA monitors needed to handle 15.7 kHz horizontal scan rates with RGBI signals*EGA monitors required support for 21.8 kHz scan rates with analog RGB signals*VGA monitors needed 31.5 kHz scan rates with a different analog RGB implementation
=== CGA ===
The widely used VGA mode was the MCGA : 320x200x256. When those kind of display were widely available the CGA and EGA were obsolete and the PC could start to kick Amiga and Atari ST standards out of the place. VGA could also display a 640x480x16 video mode. All those from a 262,144colour total palette (6x6x6 bits).
VGA could emulate all CGA and EGA modes. However, as VGA monitors no longer supported 15KHz 15.7kHz signals, CGA, EGA, and MCGA modes were line-doubled to match the monitor's capabilities.
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