4 * Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
9 static char rcsid[] = "$Id$";
13 * Revision 1.10 2008/02/22 17:07:00 james
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16 * Revision 1.9 2008/02/07 13:22:51 james
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22 * Revision 1.7 2008/02/07 12:41:06 james
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37 * Revision 1.2 2008/02/04 02:05:06 james
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40 * Revision 1.1 2008/02/03 23:31:25 james
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48 crt_erase (CRT * c, CRT_Pos s, CRT_Pos e, int ea,int color)
50 CRT_CA *ps = &c->screen[CRT_ADDR_POS (&s)];
51 CRT_CA *pe = &c->screen[CRT_ADDR_POS (&e)];
58 ps->attr = CRT_ATTR_NORMAL;
70 CRT_Pos e = { CRT_COLS - 1, CRT_ROWS - 1 };
73 crt_erase (c, s, e, 1, CRT_COLOR_NORMAL);
78 crt_scroll_up (CRT * c, CRT_Pos s, CRT_Pos e, int ea,int color)
98 p = CRT_ADDR_POS (&s);
102 memcpy (&c->screen[p], &c->screen[p + CRT_COLS], l);
107 crt_erase (c, s, e, ea,color);
112 crt_scroll_down (CRT * c, CRT_Pos s, CRT_Pos e, int ea,int color)
126 l *= sizeof (CRT_CA);
131 p = CRT_ADDR_POS (&e);
135 memcpy (&c->screen[p], &c->screen[p - CRT_COLS], l);
140 crt_erase (c, s, e, ea,color);
156 crt_insert (CRT * c, CRT_CA ca)
160 if (c->pos.x >= CRT_COLS)
161 c->pos.x = CRT_COLS - 1;
164 if (c->pos.y >= CRT_ROWS)
165 c->pos.y = CRT_ROWS - 1;
167 c->screen[CRT_ADDR (c->pos.y, c->pos.x)] = ca;