4 * Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
9 static char rcsid[] = "$Id$";
13 * Revision 1.3 2008/02/04 20:23:55 james
14 * *** empty log message ***
16 * Revision 1.2 2008/02/04 02:05:06 james
17 * *** empty log message ***
19 * Revision 1.1 2008/02/03 23:31:25 james
20 * *** empty log message ***
27 crt_erase (CRT * c, CRT_Pos s, CRT_Pos e,int ea)
29 CRT_CA *ps = &c->screen[CRT_ADDR_POS (&s)];
30 CRT_CA *pe = &c->screen[CRT_ADDR_POS (&e)];
36 ps->attr = CRT_ATTR_NORMAL;
46 CRT_Pos e = { CRT_COLS - 1, CRT_ROWS - 1 };
49 crt_erase (c, s, e,1);
52 for (i = 0; i < CRT_ROWS; ++i)
54 c->screen[CRT_ADDR (i, i)].chr = '@' + i;
55 c->screen[CRT_ADDR (i, i)].attr = CRT_ATTR_NORMAL;
62 crt_scroll_up (CRT * c, CRT_Pos s, CRT_Pos e,int ea)
76 p = CRT_ADDR_POS (&s);
80 memcpy (&c->screen[p], &c->screen[p + CRT_COLS], l);
85 crt_erase (c, s, e,ea);
90 crt_scroll_down (CRT * c, CRT_Pos s, CRT_Pos e,int ea)
100 l *= sizeof (CRT_CA);
104 p = CRT_ADDR_POS (&e);
108 memcpy (&c->screen[p], &c->screen[p + CRT_COLS], l);
113 crt_erase (c, s, e,ea);
128 crt_insert (CRT * c, CRT_CA ca)
132 if (c->pos.x >= CRT_COLS)
133 c->pos.x = CRT_COLS - 1;
136 if (c->pos.y >= CRT_ROWS)
137 c->pos.y = CRT_ROWS - 1;
139 c->screen[CRT_ADDR (c->pos.y, c->pos.x)] = ca;