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Annotation of 43BSDTahoe/new/X/libibm/libsrc/apa8c.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char *rcsid_apa8c_c = "$Header: apa8c.c,v 10.1 86/11/19 10:39:58 jg Exp $";
        !             3: #endif lint
        !             4: /* apa8c.c - APA8C controller initialization
        !             5:  *
        !             6:  *     apa8c_init              APA8C initialization routine
        !             7:  *     apa8c_set_colors        set defualt colors
        !             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 "apa8c.h"
        !            32: 
        !            33: /*
        !            34:  * Initialize APA8C
        !            35:  */
        !            36: 
        !            37: apa8c_init()
        !            38: {
        !            39:        u_short tmp;
        !            40: 
        !            41: #ifdef TRACE_X
        !            42:         fprintf (stderr, "In apa8c_init\n");
        !            43:         fflush (stderr);
        !            44: #endif TRACE_X
        !            45: 
        !            46:         /*
        !            47:          * Initialize (reset) the APA8C screen
        !            48:          */
        !            49: 
        !            50:        /*
        !            51:         * Set up the write and data mask.
        !            52:         */
        !            53: 
        !            54:        SET_APA8C_WRITEMASK(NOMASK);
        !            55:        SET_APA8C_DATAMASK(HIDDEN_DM);
        !            56: 
        !            57:        /*
        !            58:         * Set up the APA8C control register to use its system read/write
        !            59:         * calls in the X direction.
        !            60:         */
        !            61: 
        !            62:        SET_APA8C_FC(DCR_VEN | DCR_SEN | DCR_SWR | DCR_X | HIDDEN_FUNC);
        !            63: 
        !            64:        /*
        !            65:         * Set up the color plane select register and foreground/background
        !            66:         * registers.
        !            67:         */
        !            68: 
        !            69:        *(u_short *)CPS_REG = DEFAULT_CPS;
        !            70:        *(u_short *)FGBG_REG = DEFAULT_FGBG;
        !            71: 
        !            72:        /*
        !            73:         * Set default colors in Video Look-up Table.
        !            74:         */
        !            75: 
        !            76:        apa8c_set_colors();
        !            77: 
        !            78:        /*
        !            79:         * Test for the APA8C screen.
        !            80:         */
        !            81: 
        !            82:        tmp = *(u_short *)SCREEN_BASE;
        !            83:        *(u_short *)SCREEN_BASE = 0x0F0F;
        !            84:        if (*(u_short *)SCREEN_BASE != 0x0F0F) {
        !            85:                /*
        !            86:                 * Log error and exit
        !            87:                 */
        !            88: 
        !            89:                DeviceError("apa8 color not found !!");
        !            90:                exit(2);
        !            91:        }
        !            92:        *(u_short*)SCREEN_BASE = tmp;
        !            93: }
        !            94: 
        !            95: /*
        !            96:  * Sets default foreground and background colors in 
        !            97:  * video look-up table. FG_COLOR and BG_COLOR are default 
        !            98:  * colors. They are defined in apa8c.h
        !            99:  */
        !           100: 
        !           101: static
        !           102: apa8c_set_colors()
        !           103: {
        !           104:        register i;
        !           105: 
        !           106: #ifdef TRACE_X
        !           107:         fprintf (stderr, "In apa8c_set_colors\n");
        !           108:         fflush (stderr);
        !           109: #endif TRACE_X
        !           110: 
        !           111:        for (i = 0; i < VLT_SIZE; i++) {
        !           112:                if (i == 15)
        !           113:                        *(u_short *)VLT_REG = (u_short) (i | FG_COLOR);
        !           114:                else
        !           115:                        *(u_short *)VLT_REG = (u_short) (i | BG_COLOR);
        !           116:        }
        !           117: }

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