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Annotation of previous/src/uae-cpu/hatari-glue.c, revision 1.1

1.1     ! root        1: /*
        !             2:   Hatari - hatari-glue.c
        !             3: 
        !             4:   This file is distributed under the GNU Public License, version 2 or at
        !             5:   your option any later version. Read the file gpl.txt for details.
        !             6: 
        !             7:   This file contains some code to glue the UAE CPU core to the rest of the
        !             8:   emulator and Hatari's "illegal" opcodes.
        !             9: */
        !            10: const char HatariGlue_fileid[] = "Hatari hatari-glue.c : " __DATE__ " " __TIME__;
        !            11: 
        !            12: 
        !            13: #include <stdio.h>
        !            14: 
        !            15: #include "main.h"
        !            16: #include "configuration.h"
        !            17: #include "cycInt.h"
        !            18: #include "cart.h"
        !            19: #include "nextMemory.h"
        !            20: #include "video.h"
        !            21: 
        !            22: #include "sysdeps.h"
        !            23: #include "maccess.h"
        !            24: #include "memory.h"
        !            25: #include "newcpu.h"
        !            26: #include "hatari-glue.h"
        !            27: 
        !            28: 
        !            29: struct uae_prefs currprefs, changed_prefs;
        !            30: 
        !            31: int pendingInterrupts = 0;
        !            32: 
        !            33: 
        !            34: /**
        !            35:  * Reset custom chips
        !            36:  */
        !            37: void customreset(void)
        !            38: {
        !            39:        pendingInterrupts = 0;
        !            40: 
        !            41:        /* Reseting the GLUE video chip should also set freq/res register to 0 */
        !            42:        Video_Reset_Glue ();
        !            43: }
        !            44: 
        !            45: 
        !            46: /**
        !            47:  * Return interrupt number (1 - 7), -1 means no interrupt.
        !            48:  * Note that the interrupt stays pending if it can't be executed yet
        !            49:  * due to the interrupt level field in the SR.
        !            50:  */
        !            51: int intlev(void)
        !            52: {
        !            53:        /* There are only VBL and HBL autovector interrupts in the ST... */
        !            54:        assert((pendingInterrupts & ~((1<<4)|(1<<2))) == 0);
        !            55: 
        !            56:        if (pendingInterrupts & (1 << 4))         /* VBL interrupt? */
        !            57:        {
        !            58:                if (regs.intmask < 4)
        !            59:                        pendingInterrupts &= ~(1 << 4);
        !            60:                return 4;
        !            61:        }
        !            62:        else if (pendingInterrupts & (1 << 2))    /* HBL interrupt? */
        !            63:        {
        !            64:                if (regs.intmask < 2)
        !            65:                        pendingInterrupts &= ~(1 << 2);
        !            66:                return 2;
        !            67:        }
        !            68: 
        !            69:        return -1;
        !            70: }
        !            71: 
        !            72: 
        !            73: /**
        !            74:  * Initialize 680x0 emulation
        !            75:  */
        !            76: int Init680x0(void)
        !            77: {
        !            78:        currprefs.cpu_level = changed_prefs.cpu_level = ConfigureParams.System.nCpuLevel;
        !            79:        currprefs.cpu_compatible = changed_prefs.cpu_compatible = ConfigureParams.System.bCompatibleCpu;
        !            80:        currprefs.address_space_24 = changed_prefs.address_space_24 = false;
        !            81: 
        !            82:        init_m68k();
        !            83: 
        !            84:        return true;
        !            85: }
        !            86: 
        !            87: 
        !            88: /**
        !            89:  * Deinitialize 680x0 emulation
        !            90:  */
        !            91: void Exit680x0(void)
        !            92: {
        !            93:        memory_uninit();
        !            94: 
        !            95:        free(table68k);
        !            96:        table68k = NULL;
        !            97: }
        !            98: 
        !            99: 
        !           100: /**
        !           101:  * Check if the CPU type has been changed
        !           102:  */
        !           103: void check_prefs_changed_cpu(void)
        !           104: {
        !           105:        if (currprefs.cpu_level != changed_prefs.cpu_level
        !           106:                        || currprefs.cpu_compatible != changed_prefs.cpu_compatible)
        !           107:        {
        !           108:                currprefs.cpu_level = changed_prefs.cpu_level;
        !           109:                currprefs.cpu_compatible = changed_prefs.cpu_compatible;
        !           110:                set_special(SPCFLAG_MODE_CHANGE);
        !           111:                build_cpufunctbl ();
        !           112:        }
        !           113: }
        !           114: 
        !           115: 
        !           116: 

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