Hi everyone,

thanks for all the answers !

I'm gonna have a look at Cygnal and Keil web sites.

Currently the CPLD (FPGA ?) way seems the more accurate for my project, unfortunately I never experienced that kind of devices.

One last thing : I'm a pure hobbyist, so I'm reduced to 'mainstream' chips (ie those which can be bought in very small qties). Not the least constraint, I now realize...

Romuald
PS : AT89S8252 is a standard (40 pins) 8051-compatible chip. My needs are 8 or 16kb ROM/Flash, 32k RAM, dual dptr optional.