New variant found on [SATURN] Akumajou Dracula X: Gekka no Yasoukyoku

wndsize = 0x400
wndoff = 0x3de

loop:
```
if (bit)
{
    b = read_byte(input, &readoff);
    write_byte(output, &writeoff, (byte)b);
    write_to_wnd(window, &wndoff, (byte)b);
}
else
{
    b = read_word(input, &readoff);
    reps = (b & 0x1F) + 3;
    from = ((b & 0xe0) << 3) | (b >> 8)
}
```