Then I took the Rate/Level 1-4 envelopes, which had a range of 100 values (0-99) and mathmatically converted them to the SY's 64 values (0-63). Basically, I set the Frequencies of the SY synth to be the same as the DX operator frequencies. I converted some DX7 programs, but it was all manually. The TG77 has both ROM and the SY77/99 FM engine. The 77 is a rompler, the DX7 a synth, the only thing in common is the brand.
