ASM --> C++

/*
;-------------------------------; Random Number Generator
GetRand:                        ; By: 1024
    PHY                         ; Comments By: Fakescaper
    LDY #$01                    ;
    JSR .Maths                  ;
    DEY                         ;
    JSR .Maths                  ;
    PLY                         ;
    RTL                         ;
.Maths  LDA $148B               ;
    ASL #2                      ;
    SEC                         ;
    ADC $148B                   ;
    STA $148B                   ;
    ASL $148C                   ;
    LDA #$20                    ;
    BIT $148C                   ;
    BCC .Label1                 ; If any of the ADC or ASL cleared carry,
    BEQ .Label2                 ; reverse the results of the BIT test
    BNE .Label3                 ;
.Label1  BNE .Label2            ;
.Label3                         ;
    INC $148C                   ; when determining whether or not we INC
.Label2                         ;
    LDA $148C                   ;
    EOR $148B                   ;
    STA $148D,Y                 ; Output gets stored in this RAM Address, 16 bit result.
    RTS                         ; You might want to add an ADC $13 or SBC $94 before this STA for extra "random"
;-------------------------------; (or you can just do it after calling this routine)
*/

/*
Below is a rewritten version that outputs the same numbers pretty much
A random routine that lets you specify how many bytes of entropy to produce.

*/
#include <iostream>
#include <iomanip>
#include <ctime>        // For the time function
using namespace std;

// Process setting/clearing the carry flag
void Process_C(int &A, bool &PF_C)
{
    PF_C = false;
    while(A < 0 || A > 255){PF_C = true; A &= 0xFF;}
}

//[0, ((256^bytes)-1)]
unsigned long int GetRand(int bytes, int &ADR_148B, int &ADR_148C, bool &PF_C)
{
    unsigned long int out = 0;

    do
    {
        int temp = ADR_148B;
        temp = temp << 2;
        temp += ADR_148B + 1;
        temp &= 0xFF;
        ADR_148B = temp;

        ADR_148C = ADR_148C << 1;
        Process_C(ADR_148C, PF_C);

        if ( (!PF_C) ^ (0x20 & ADR_148C) )
        {
            if (++ADR_148C > 255)
            {
                ADR_148C = 0;
            }
        }

        temp = ADR_148C^ADR_148B;

        out |= temp;

        while(bytes > 1 && (out & 0xFF))
        {
            out = out << 8;
        }

        bytes--;
    }
    while(bytes > 0);

    return out;
}

// How many digits the decimal values of bytes will be
int wid[] = {
    0, 3, 5, 8, 10, 13, 15, 17
};

int main()
{
    // The Carry Processor Flag
    bool PF_C;

    int ADR_148B;
    int ADR_148C;

    ADR_148B = (ADR_148B + time(0)) & 0xFF;
    ADR_148C = (ADR_148C + time(0)) & 0xFF;

    unsigned long int temp;

    for(int i = 1; i <= 5; i++)
    {
        for(int i = 1; i <= 4; i++)
        {
            temp = GetRand(i, ADR_148B, ADR_148C, PF_C); // i bytes of entropy from 1-4 (8-bit, 32-bit, 512-bit, 4096-bit)
            cout << "0x" << setfill('0') << setw(i*2) << uppercase << hex << temp << " (" << setfill(' ') << setw(wid[i]) << dec << temp << ") - ";
        }

        cout << "\n";

        //temp = GetRand(2, ADR_148B, ADR_148C, PF_C); 2 bytes of entropy
        //cout << "\n" << "0x" << uppercase << hex << temp << " (" << dec << temp << ")\n\n";
    }

    cout << "\n";

    long double avg = 0;
    int cnt = 0;

    for(int i = 1; i <= 14; i++)
    {
        for(int i = 1; i <= 6; i++)
        {
            temp = GetRand(1, ADR_148B, ADR_148C, PF_C);
            avg += temp;
            cnt++;
            cout << "0x" << setfill('0') << setw(2) << uppercase << hex << temp << " (" << setfill(' ') << setw(3) << dec << temp << ") - ";
        }
        cout << "\n";
    }

    cout << "The average of " << cnt << " random values was: " << avg/cnt << " for 1 byte of entropy (0-255).";
    cout << "\nWhich is a difference of " << (avg/cnt)-127.5 << "\nFrom the expected average of 127.5";

    /*
    2 bytes: 32767.5
    3 bytes: 8388607.5
    4 bytes: 2147483647.5
    */

    cout << "\n\nPress Enter to Exit. ";

    cin.ignore();
    //cin.get();
    return 0;
}