Modulo operator don't work in interrupts

[FavoritoHJS]

The function used (tcc_udiv) does not like having the direct page register being not zero, as one of its instructions uses absolute addressing and not the direct page addressing that the other instructions use.

The following is a small example based on the hello world example showing this. The value displayed should always be 0, 10 or 20 (remember, %x displays a number in hexadecimal), but it displays 70 instead.

There's a small hack with swapping out NMI routines since I don't know how to make new text display when using a custom NMI routine, if you can tell me how to do it I would appreciate it.

/*---------------------------------------------------------------------------------


    Simple console 'hello world' demo
    -- alekmaul


---------------------------------------------------------------------------------*/
#include <snes.h>

extern char tilfont, palfont;
void (*oldnmi)(void);
u16 tileid;
//---------------------------------------------------------------------------------
void updateRowBuffer(void) {
    u16 temp = 4;
    /*This should never be greater than 0x20*/
    u16 tile = ( temp % 3 ) * 16;
    tileid = tile;
}
int main(void)
{
    // Initialize text console with our font
    consoleSetTextVramBGAdr(0x6800);
    consoleSetTextVramAdr(0x3000);
    consoleSetTextOffset(0x0100);
    consoleInitText(0, 16 * 2, &tilfont, &palfont);

    // Init background
    bgSetGfxPtr(0, 0x2000);
    bgSetMapPtr(0, 0x6800, SC_32x32);

    // Now Put in 16 color mode and disable Bgs except current
    setMode(BG_MODE1, 0);
    bgSetDisable(1);
    bgSetDisable(2);
    // Draw a wonderful text :P
    consoleDrawText(10, 10, "Hello World !");
    consoleDrawText(6, 14, "WELCOME TO PVSNESLIB");
    consoleDrawText(3, 18, "HTTPS://WWW.PORTABLEDEV.COM");

    oldnmi = nmi_handler;
    nmiSet(updateRowBuffer);
    WaitForVBlank();
    WaitForVBlank();
    consoleDrawText(5, 6, "%x", tileid);
    nmiSet(oldnmi);
    // Wait for nothing :P
    setScreenOn();
    while (1)
    {
        WaitForVBlank();
    }
    return 0;
}