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