Function txt_backsp

sys/msdos/vidtxt.c:122–142

extern int monoflag;    /* 0 = not monochrome, else monochrome */

void
txt_backsp(void)
{
#ifdef PC9800
    union REGS regs;

    regs.h.dl = 0x01; /* one column */
    regs.h.ah = CURSOR_LEFT;
    regs.h.cl = DIRECT_CON_IO;

    int86(DOS_EXT_FUNC, &regs, &regs);

#else
    int col, row;

    txt_get_cursor(&col, &row);
    if (col > 0)
        col = col - 1;
    txt_gotoxy(col, row);
#endif
}

void
txt_nhbell(void)