We are pouring all resources to develop and maintain S2, S3, S3+, S4, S5 and new products, have stopped updating S1 firmware.
1. The Typical hash rate and power table
2. The Work Input timing table
And if at all feasible without divulging your trade secrets, the functions available at chip level to set voltage, freq etc. This would enable intrested party further developement rather than having to depend on the goodwill of the cgminer crew. Believe it or not, there are still a number of S1's out there and despite bitmain having discontinued the line, we still use these machines.