SPX_BG_COLOR
*defattrp = (SPX_BG_COLOR << 4) | SPX_FG_COLOR;
spx_blkset(0, 0, spx_xsize, spx_ysize, SPX_BG_COLOR);
(SPX_BG_COLOR << 4) | SPX_FG_COLOR;
(SPX_BG_COLOR << 4) | SPX_FG_COLOR);