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Annotation of researchv9/sys/sun3/enable.h, revision 1.1

1.1     ! root        1: /*      @(#)enable.h 1.1 86/02/03 SMI      */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 1985 by Sun Microsystems, Inc.
        !             5:  */
        !             6: 
        !             7: /*
        !             8:  * The System Enable register controls overall
        !             9:  * operation of the system.  When the system is
        !            10:  * reset, the Enable register is cleared.  The
        !            11:  * enable register is addressed as a byte in
        !            12:  * FC_MAP space.
        !            13:  */
        !            14: 
        !            15: /*
        !            16:  * Bits of the Enable Register
        !            17:  */
        !            18: #define        ENA_DIAG        0x01            /* r/o - diag switch, 1 = on */
        !            19: #define        ENA_FPA         0x02            /* r/w - enable floating point accel */
        !            20: #define        ENA_COPY        0x04            /* r/w - enable copy update mode */
        !            21: #define        ENA_VIDEO       0x08            /* r/w - enable video memory */
        !            22: #define        ENA_CACHE       0x10            /* r/w - enable external cache */
        !            23: #define        ENA_SDVMA       0x20            /* r/w - enable system DVMA */
        !            24: #define        ENA_FPP         0x40            /* r/w - enable floating point proc */
        !            25: #define        ENA_NOTBOOT     0x80            /* r/w - non-boot state, 1 = normal */
        !            26: 
        !            27: 
        !            28: #define        ENABLEREG       0x40000000      /* addr of enable reg in FC_MAP space */

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