Did anyone install 27С010 vs 29c010?

Hello, All Actually the subject. Initial data - Scorpio 256 + professional ROM. Prof-ROM is assembled on the basis of the 27C010 microcircuit. A stupid replacement with 29С010 did not bring the desired result. The car did not start. After rummaging around in my head, a single thought arose (Kindly suggested by Spensor ) are timings. 27s010 - 150 29s010 - 70, that is, twice as fast. Hence the question - do you have any thoughts on how to make this happen? work? 29s010 - a complete clone in content of 27s010.

Hello, Mikka_A Mik> 29с010 - a complete clone in content of 27с010. I found it here.... http://members.tripod.com/%7Epiters/zxfl_sch.htm but how to apply this to professional ROM. And then.. Will it be flashed with the proposed software... Eh... problem...