variables and disable the Alpha assembler for now, since it has been
shown to fail.

The Alpha failure can be shown by adding the following numbers:

FFFFFFFFFFFFFF0000FF2E00000000EBFFFFFF0000D1
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF46FFE0FFFF0000

The result is:

1FFFFFFFFFFFEFF0000FF2E0000000032FFE0FEFF00D1

The result should really be:

1FFFFFFFFFFFFFF0000FF2E0000000032FFE0FEFF00D1