Well, i didn't know there was a AT89S8253. It is very nice.

I'll look for AT89S8252 and see the features, i always hear from this mC in the forum. Now i'm curious and get some to play with... and will search for a isp programmer here

The bad thing i haven't looked for another assembler other than Frankling, i'll search for another one *free* that supports AT89S8252.