Added new approach for values used when reading from the write port.
Previously these values were from whatever was on the databus, but new testing indicates that they are semi-random (ie, random, but with some pattern). The new code bases the values in part on the md5sum of the ROM (for randomization), but also pre-generates a set number of values (for a pattern). Currently only F8SC scheme is implemented. The remainder will be done once we test this one.