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MXGA
ZG94-0485
IBM Multiple XGA Display Device Drivers
83G8292MXGA_OS2.IMA OS/2 2.11-4.0 Install Package created by Ryan Alwede 2.11-3.0 installs as-is, 4.0 needs some twiddling. NOTE: Ryan was looking for drivers for the Nth Graphics Double Edge XGA-2 adapter. While snuffling through the hard drives, he found the mythical MXGA drivers. Ryan foundt references to the I: drive [on a NetWare server], but the networked drive has not been foundt yet. So we don't have the full OS/2 - Win3.1 install package :( MXGA was co-developed [?] between IBM and Software 2000. Czeching the Internet Archive produced ZERO hits for MXGA on Software 2000's site. Perhaps we can compare MXGA [built on DMQS] to a "sordid" AI. The 8514 AI "hid" the 8514 registers and you operated the adapter via high level commands. -BUT- DMQS informs the operating system about the adapter's capabilities, leaving it up to the operating system to operate the adapter. DMQS depends on the existence of XGA-NI in order to seamlessly provide adapter capabilities. My SWAG is that information can be provided to XGA via drivers or setup files. Problem is that we don't know WHAT DMQS could provide to XGA. Does DMQS provide a "window" into the latest XGA-NI capabilities? For example, DMQS has an "Optional Extension" for Display Color Characteristics. It refers to CIE color. Perhaps this is akin to W95's *.ICM files? 42G2193 PS/2 HITR Video Subsystems Sep 92 pages 319-354 [DMQS] DMQS Information File Optional Extensions pages 331-334 The following optional extensions to the display information file have been defined. For the location of the optional extensions within the file see Figure 3-186 on page 3-195. Display Color Characteristics: The precise color characteristics of the display can be encoded in the DMQS display information file, using an optional extension, to allow software to encode the palette or select colors to satisfy specific color requirements. This color information consists of X,Y coordinate pairs of the primary color points in the CIE color chart, their peak luminance values, and their gamma correction values. Each CIE chart coordinate pair consists of two 16-bit fractional integers in the range of 0 to 1. Each such integer is a fraction of 1, so that a field value of hex 8000 is equivalent to 0.5, and hex FFFF is (almost) 1.0. Each peak luminance value is a 16-bit unsigned integer, which is that color's peak luminance multiplied by 10. For example, a field of decimal 175 represents an actual peak luminance value of 17.5. Each gamma correction value is a 16-bit unsigned integer, which is that color's gamma correction factor multiplied by 100. For example, a field value of decimal 220 represents a gamma correction of 2.2. Figure 3-188. DMQS Display Color Characteristics
Pre-selected Colors: A list of pre-selected colors certified to comply with ISO 9241 may be encoded in the DMQS display file, using an optional extension. The colors in this pre-selected list are certified by the display manufacturer to be sufficiently far apart on the CIELUV space-distance measurement system. Software may use these pre-selected colors in ISO-conforming applications, or may alternatively use the color characteristics data described in "Display Color Characteristics" on page 3-197 to generate an alternative list. ISO 9241 specified that sets of 6 and 11 colors be available. In this pre-selected list, a single set of 11 colors is presented, of which the first 6 comprise the set of 6, and all 11 comprise the set of 11 compliant colors. The list consists of an 11-entry array, each entry consisting of a 13-character text string describing the color, and three 1-byte values representing the RGB values used to generate the color. Figure 3-189. DMQS Display Pre-selected Colors
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