4 * Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
9 static char rcsid[] = "$Id$";
13 * Revision 1.4 2008/02/05 01:11:46 james
14 * *** empty log message ***
16 * Revision 1.3 2008/02/04 20:23:55 james
17 * *** empty log message ***
19 * Revision 1.2 2008/02/04 02:05:06 james
20 * *** empty log message ***
22 * Revision 1.1 2008/02/03 23:31:25 james
23 * *** empty log message ***
30 crt_erase (CRT * c, CRT_Pos s, CRT_Pos e,int ea)
32 CRT_CA *ps = &c->screen[CRT_ADDR_POS (&s)];
33 CRT_CA *pe = &c->screen[CRT_ADDR_POS (&e)];
39 ps->attr = CRT_ATTR_NORMAL;
49 CRT_Pos e = { CRT_COLS - 1, CRT_ROWS - 1 };
52 crt_erase (c, s, e,1);
55 for (i = 0; i < CRT_ROWS; ++i)
57 c->screen[CRT_ADDR (i, i)].chr = '@' + i;
58 c->screen[CRT_ADDR (i, i)].attr = CRT_ATTR_NORMAL;
65 crt_scroll_up (CRT * c, CRT_Pos s, CRT_Pos e,int ea)
79 p = CRT_ADDR_POS (&s);
83 memcpy (&c->screen[p], &c->screen[p + CRT_COLS], l);
88 crt_erase (c, s, e,ea);
93 crt_scroll_down (CRT * c, CRT_Pos s, CRT_Pos e,int ea)
103 l *= sizeof (CRT_CA);
108 p = CRT_ADDR_POS (&e);
112 memcpy (&c->screen[p],&c->screen[p-CRT_COLS], l);
117 crt_erase (c, s, e,ea);
132 crt_insert (CRT * c, CRT_CA ca)
136 if (c->pos.x >= CRT_COLS)
137 c->pos.x = CRT_COLS - 1;
140 if (c->pos.y >= CRT_ROWS)
141 c->pos.y = CRT_ROWS - 1;
143 c->screen[CRT_ADDR (c->pos.y, c->pos.x)] = ca;