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Emulation attribute mapping for a color video display
| Details |
Inventors: Zelinsky, Jerold M.; Stafford, John P.; Lief, Gerald A.;
Assignee: Bull HN Information Systems Inc. (Billerica, MA)
Primary Examiner: Harkcom; Gary V.
Assistant Examiner: Nguyen; Phu K.
Attorney, Agent or Firm: Cechony; Gerald J., Solakian; John S., Elbinger; Lewis P.
A host computer stores data and attribute bytes for display on a terminal or personal computer having a monochrome screen. The monochrome attributes include low intensity, underline, inverse, blink and hide. The host computer may communicate with a terminal or personal computer having a color screen without modifying the host program or the data and attribute bytes. The terminal or personal computer operator may determine the color and attribute for each of the monochrome attributes. |
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DETAILED DESCRIPTION What is claimed is: 1.
A method of translating monochrome attributes to colors and color attributes for display on a color screen, said method comprising the steps of: A.
displaying a menu including a plurality of monochrome attributes, a plurality of colors for each of said plurality of monochrome attributes, and a plurality of color attributes for each of said plurality of monochrome attributes; B.
associating from said menu one of said plurality of colors and one of said plurality of color attributes in combination with each of said plurality of monochrome attributes; C.
generating a color attribute matrix in the memory having a plurality of color attribute bytes, one color attribute byte representative of each combination of color and color attribute; D.
initializing a pointer stored in said memory, said pointer pointing to the first location of a translation table stored in said memory; E.
getting a certain color attribute byte selected by indexing said color attribute matrix using a first color and first color attribute selected by said menu for the first of said plurality of monochrome attributes; F.
testing if a first bit of said pointer equals binary ONE, said first bit corresponding to a first bit of a certain monochrome attribute byte; G.
storing said certain color attribute byte in said translation table at a location specified by contents of said pointer if said first bit is binary ONE and incrementing said pointer, or incrementing said pointer if said first bit is not binary ONE; H.
testing if the contents of said pointer equal decimal 32; and I.
repeating steps F through I if the contents of said pointer do not equal 32 and repeating steps D through I when the contents of said pointer equals decimal 32 for each subsequent monochrome attribute.
2.
The method of claim 1 further comprising the steps of: A.
getting from said memory a monochrome attribute byte representative of one of said plurality of monochrome attributes; B.
addressing said translation table by said monochrome attribute byte and reading out said color attribute byte; C
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