If you have an 8052 AH BASIC device, running V1.1 then "PROG 4" should work. There are lots of options on the PROG command. This one tells the 8052 to start up a program automatically, and also burns the MTOP information so that the '52 doesn't autosize RAM. This means that non-volatile RAM data is not corrupted.

If you want a full list of the PROG and FPROG commands, post a message here.

Steve