Jed,

    The one line change I was refering to is in [bike.cycle.stest]gsptst.asm.

    I went looking for remaining data which wasn't in those ROMs.  I didn't
    find any which overflowed into the last pair of 512's.  So, I repeated the
    test by filling RAM with 0's, checking  that their checksums were indeed
    0000, and running selftest.  Only this time when I flipped the selftest
    switch to gamemode, the game came up.  Farrokh had to leave.  We'll try
    it again tomorrow afternoon.

                                        Bonnie