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Annotation of 43BSDTahoe/new/X/libibm/libsrc/apa8.c, revision 1.1.1.1

1.1       root        1: #ifndef lint
                      2: static char *rcsid_apa8_c = "$Header: apa8.c,v 10.1 86/11/19 10:39:37 jg Exp $";
                      3: #endif lint
                      4: /*
                      5:  * apa8.c              device initialization
                      6:  *
                      7:  *     apa8_init       apa8 initialization routine
                      8:  *
                      9:  *     Author:
                     10:  *             Scott Bates
                     11:  *             Brown University
                     12:  *             IRIS, Box 1946
                     13:  *             Providence, RI 02912
                     14:  *
                     15:  *
                     16:  *             Copyright (c) 1986 Brown University
                     17:  *
                     18:  * Permission to use, copy, modify and distribute this software and its
                     19:  * documentation for any purpose and without fee is hereby granted, provided
                     20:  * that the above copyright notice appear in all copies, and that both
                     21:  * that copyright notice and this permission notice appear in supporting
                     22:  * documentation, and that the name of Brown University not be used in
                     23:  * advertising or publicity pertaining to distribution of the software
                     24:  * without specific, written prior permission. Brown University makes no
                     25:  * representations about the suitability of this software for any purpose.
                     26:  * It is provided "as-is" without express or implied warranty.
                     27:  */
                     28: 
                     29: #include "private.h"
                     30: #include "bitblt.h"
                     31: #include "apa8.h"
                     32: 
                     33: apa8_init()
                     34: {
                     35:         u_char tmp;
                     36: 
                     37: #ifdef TRACE_X
                     38:         fprintf (stderr, "In apa8_init\n");
                     39:         fflush (stderr);
                     40: #endif TRACE_X
                     41: 
                     42:         /*
                     43:          * Initialize (reset) the APA-8 screen
                     44:          */
                     45: 
                     46:        /*
                     47:         * Set up the write and data mask.
                     48:         */
                     49: 
                     50:        SET_WRITEMASK(NOMASK);
                     51:        SET_DATAMASK(HIDDEN_DM);
                     52: 
                     53:        /*
                     54:         * Set up the APA8 control register to use its system read/write
                     55:         * calls in the X direction.
                     56:         */
                     57: 
                     58:        SET_FC(DCR_VEN | DCR_SEN | DCR_SWR | DCR_X | HIDDEN_FUNC);
                     59: 
                     60:         /*
                     61:          * Test for the APA8 screen.
                     62:          */
                     63: 
                     64:        tmp = *(u_char *)SCREEN_BASE;
                     65:         *(u_char *)SCREEN_BASE = 0x0F;
                     66:         if (*(u_char *)SCREEN_BASE != 0x0F) {
                     67:                 DeviceError("apa8 not found !!");
                     68:                exit(2);
                     69:         }
                     70:        *(u_char *)SCREEN_BASE = tmp;
                     71: }

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