Accessing to the save/load game data

[KeiDash]

I'm reading the code of Thor in the game "Another Day in hell" and Thor was a file for this called flash.c. I understand that this file overwrite the methods flasha and GetSavedData right?

I think that this can help me but I have a big doubt. I'm never learn assembly and I don't understand any values or vars, etc.

Loic, you say me that I only want to know the SAVEOFFSET and the BLOCK_NB. The saveoffset it's an array? How can I determinate the size in my case and how to set the value?

This is the code of Thor to do it.

Code:

#include "ngpc.h"

u8 data[256];

#define    MAGIC_NB    0xcafebabe    // java rules !

void flash(void *data)
{
    __ASM("SAVEOFFSET    EQU    0x1e0000");

    __ASM("BLOCK_NB        EQU    30");
    __ASM("VECT_FLASHWRITE    EQU    6");
    __ASM("VECT_FLASHERS    EQU    8");
    __ASM("rWDCR        EQU    0x6f");
    __ASM("WD_CLR        EQU    0x4e");

    // Erase block first (mandatory) : 64kb for only 256 bytes
    __ASM("    ld    ra3,0");
    __ASM("    ld    rb3,BLOCK_NB");
    __ASM("    ld    rw3,VECT_FLASHERS");
    __ASM("    ld    (rWDCR),WD_CLR");
    __ASM("    swi    1");

    // Then write data
    __ASM("    ld    ra3,0");
    __ASM("    ld    rbc3,1");    // 256 bytes
    __ASM("    ld    xhl,(xsp+4)");
    __ASM("    ld    xhl3,xhl");
    __ASM("    ld    xde3,SAVEOFFSET");
    __ASM("    ld    rw3,VECT_FLASHWRITE");
    __ASM("    ld    (rWDCR),WD_CLR");
    __ASM("    swi    1");

    __ASM("    ld    (rWDCR),WD_CLR");
}

void getSavedData()
{
    u32 *ptr = (u32*)(0x200000+0x1e0000);
    u32 *ptrData = (u32*)data;
    u8 i;
    if (*ptr == MAGIC_NB) // Data saved
    {
        for (i=0;i<64;i++)
            ptrData[i] = ptr[i];
    }
    else // No data
    {
        ptrData[0] = MAGIC_NB;
        for (i=1;i<64;i++)
            ptrData[i] = 0;
    }
}