pvbemu/src/core/vue.c

#define VUEAPI
#include <vue.h>



/*****************************************************************************
 *                                 Constants                                 *
 *****************************************************************************/

/* Memory access type sizes */
static const int TYPE_SIZES[] = { 1, 1, 2, 2, 4 };



/*****************************************************************************
 *                            Component Includes                             *
 *****************************************************************************/

#include "bus.c"



/*****************************************************************************
 *                             Library Functions                             *
 *****************************************************************************/

/* Prepare an emulation state context for use */
void vueInitialize(VUE *vue) {
    vue->rom  = NULL;
    vue->sram = NULL;
}

/* Perform a read operation */
vbool vueRead(VUE *vue, uint32_t address, uint8_t *data, uint32_t length) {
    uint32_t count; /* Bytes to read in one iteration */

    /* Error checking */
    if (
        vue    == NULL ||
        data   == NULL ||
        length >  0x01000000
    ) return VUE_FALSE;

    /* Perform the operation */
    for (; length > 0; address += count, length -= count, data += count) {

        /* Determine the maximum number of bytes to process at once */
        count = 0x01000000 - (address & 0x00FFFFFF);
        if (count > length)
            count = length;

        /* Process by component */
        switch (address >> 24 & 7) {
            /* case 7: ROM, etc */
        }

    };
    return VUE_TRUE;
}

/* Specify a new ROM buffer */
vbool vueSetROM(VUE *vue, uint8_t *rom, uint32_t size) {

    /* Error checking */
    if (
        vue == NULL ||
        rom == NULL ||
        size < 1024 || size > 0x01000000 ||
        (size & (size - 1)) != 0
    ) return VUE_FALSE;

    /* Accept the new ROM buffer */
    vue->rom      = rom;
    vue->rom_size = size;
    return VUE_TRUE;
}