Peter,

yes, I've read it. And I would like to refer to refer to Eric Malund's comment to your post!

If you simply try to convert an C file containing KEIL specific language extensions to uC/51 without a closer look, you'll hardly get an optimal result. Please READ THE DOCUMENTATION FIRST, until you criticize:
i.e. static variables must be modified as 'near' for the internal ram, or bit variables must be declared as 'unsigned near char bit'...

uC/51 was not designed as a KEIL clone, it has it's own philosophy, and the cases, where we have compared it show us we're right (i.e. uC/51 V1.00 compiles it's floating point (C sourcecode) library with 20% less size, than if compiled with KEIL (regarding KEIL specific adaptions)).

There is ABSOLUTELY NO NEED for EXTERNAL RAM with uC/51 V1.00.

Juergen