• src/conio/bitmap_con.c ciolib.h cterm.c

    From Deucе@VERT to Git commit to main/sbbs/master on Thu Feb 13 23:51:26 2025
    https://gitlab.synchro.net/main/sbbs/-/commit/882080e26afe2ada0436d407
    Modified Files:
    src/conio/bitmap_con.c ciolib.h cterm.c
    Log Message:
    Fix Mode 7 (ie: SAA5050) mode double-height handling

    Basically, the only thing the SAA5050 enforces is that characters
    on a bottom row need to be double-height, or they're displayed as
    spaces.

    The Prestel terminal now has an extra bit that indicates it is a
    prestel terminal, and the bitmap console hacks up the second row.

    While we're poking this, use macros for magic bits in FG/BG colours.

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