May be did write confusing, sorry about that. Two i2c devices are on the same bus, I just need it to be placed inside of one microcontaroller.
Microchip has an application note on it, hhere is software emulated i2c port. I'm thinking to make the same on Cygnal, in C but just affraid that it'll be not fast enough.
If I could find 8051 with 2 hardware i2c ports it was a simple solution for me.

Thank you,
Vladimir