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AX = 003Ch ES:BX -> buffer for screen contents CX = leftmost column DX = rightmost column SI = top row DI = bottom row
Notes: The FGDRIVER functions are rearranged with each major release, but their parameters do not change (see #03474 at AX=0000h). In text modes, coordinates are character positions; in graphics modes, they are defined in screen space, and the left and right edges are adjusted to a byte boundary if necessary. Use "FG_IMAGESIZ" (see AX=005Ch) to determine the required buffer size
See Also: AX=0044h - AX=005Ch - AX=0098h
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