private void bsCodeButton_Click(object sender, EventArgs e)
{
ulong input = ulong.Parse(bsCode.Text);
BWL d0 = (uint)(input >> 32);
BWL d1 = (uint)(input & uint.MaxValue);
d0.w ^= 0x55;
BWL d2 = d0.w;
d0.w &= 0x3F;
d1.l ^= 0xAAAAAAAA;
d1.RotateLeftL(6);
BWL d3 = d1.hw;
d3.w &= 0xF800;
d3.w >>= 5;
d3.w |= d0.w;
d3.w &= 0x7FF;
d1.l -= 0x1234567;
d2.w &= 0x40;
if (d2.w != 0)
{
d1.l += 0x7654321;
}
d1.l &= 0x7FFFFFF;
BWL d4 = d1.hw;
bool c = (d4.w & 1) == 1;
d4.w >>= 1;
if (c)
{
d4.w ^= 0x8810;
}
d4.w ^= d1.w;
c = (d4.w & 1) == 1;
d4.w >>= 1;
if (c)
{
d4.w ^= 0x8810;
}
d4.w &= 0x7FF;
if (d4.w != d3.w)
{
MessageBox.Show(this, "Invalid code.", "S3SSEdit", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
if (d2.w != 0)
{
d1.l -= 0x7654321;
d1.l &= 0x7FFFFFF;
}
bsLevelNum.Value = d1.l + 1;
LevelChanged(d1.l);
}
private void LevelChanged(uint levelnum)
{
BSMode = BSMode.Level;
bsStageChunk1.Value = BSChunks[0] = (byte)(levelnum & 0x7F);
BWL d0 = levelnum * 3 + 1;
BWL d2 = new BWL(d0.w, (ushort)(d0.hw % 0x7F));
bsStageChunk2.Value = BSChunks[1] = (byte)(d0.l % 0x7F);
d0 = levelnum * 5 + 2;
d2 = new BWL(d0.w, (ushort)(d0.hw % 0x7E));
bsStageChunk3.Value = BSChunks[2] = (byte)(d0.l % 0x7E);
d0 = levelnum * 7 + 3;
d2 = new BWL(d0.w, (ushort)(d0.hw % 0x7D));
bsStageChunk4.Value = BSChunks[3] = (byte)(d0.l % 0x7D);
StageChanged();
}
private void GenerateCode(uint levelnum, bool lockon)
{
BWL a2 = levelnum;
if (lockon)
{
a2.l += 0x7654321;
}
a2.l &= 0x7FFFFFF;
BWL d4 = a2.hw;
bool c = (d4.w & 1) == 1;
d4.w >>= 1;
if (c)
{
d4.w ^= 0x8810;
}
d4.w ^= a2.w;
c = (d4.w & 1) == 1;
d4.w >>= 1;
if (c)
{
d4.w ^= 0x8810;
}
BWL d0 = d4.w;
d0.w &= 0x3F;
if (lockon)
{
d0.w |= 0x40;
}
d0.w ^= 0x55;
BWL d1 = levelnum;
d1.l += 0x1234567;
d1.l &= 0x7FFFFFF;
d4.w <<= 5;
d4.w &= 0xF800;
d1.hw |= d4.w;
d1.RotateRightL(6);
d1.l ^= 0xAAAAAAAA;
bsCode.Text = (((ulong)d0.l << 32) | d1.l).ToString("000000000000");
}
private void bsROMButton_Click(object sender, EventArgs e)
{
using (OpenFileDialog dlg = new OpenFileDialog()
{
DefaultExt = "bin", Filter = "ROM Files|*.bin;*.gen;*.md|All Files|*.*"
})
if (dlg.ShowDialog(this) == DialogResult.OK)
{
byte[] fc = File.ReadAllBytes(dlg.FileName);
if (fc.Length < 0x1A6)
{
goto fail;
}
int bsheader = Array.IndexOf(headerconsoles, Encoding.ASCII.GetString(fc, 0x100, 16));
if (bsheader == -1)
{
goto fail;
}
BWL serialnum = 0;
for (int a1 = 0x180; a1 < 0x18C; a1++)
{
if (fc[a1] >= '0' && fc[a1] <= '9')
{
serialnum = serialnum.w * 10 + (fc[a1] - '0');
}
}
serialnum.l &= 0x7FFF;
if (serialnum.w == 0)
{
goto fail;
}
BWL levelnum = serialnum.w & 0x3F;
int month = Array.IndexOf(headermonths, Encoding.ASCII.GetString(fc, 0x11C, 4));
if (month == -1)
{
month = 0xF;
}
levelnum.w <<= 4;
levelnum.b |= (byte)month;
levelnum.w <<= 4;
levelnum.b |= (byte)((serialnum.w >> 6) & 0xF);
levelnum.l <<= 1;
levelnum.b |= (byte)(fc[0x150] & 1);
levelnum.l <<= 3;
levelnum.b |= (byte)((((fc[0x11A] - '0') * 10) + (fc[0x11B] - '0') - 88) & 7);
serialnum.RotateLeftW(6);
serialnum.w &= 0x1F;
levelnum.l <<= 5;
levelnum.b |= serialnum.b;
levelnum.l <<= 2;
levelnum.b |= (byte)((ByteConverter.ToUInt16(fc, 0x1A4) >> 3) & 3);
levelnum.l <<= 1;
if (Encoding.ASCII.GetString(fc, 0x114, 2) == "EG")
{
levelnum.b |= 1;
}
levelnum.l <<= 1;
levelnum.b |= (byte)bsheader;
levelnum.l &= 0x7FFFFFF;
bsLevelNum.Value = levelnum.l + 1;
GenerateCode(levelnum.l, true);
LevelChanged(levelnum.l);
}
return;
fail:
MessageBox.Show(this, "File is not a Sega Mega Drive/Genesis ROM.", "S3SSEdit", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
