mak,

I downloaded e-forth years ago but have never used it you can find it here.

The "Read Me" file explains;

"eForth is a small portable Forthdesign for a wide range of microprocessors. This implementation for 8051/31 microcontroller on an IBM-PC/XT/AT personal computer demonstrates the poratbility of the eForth Model. The MASM source file is provided so that you can
easily rewrite it for your target 8051 system."

Sounds like a cross-compiler to me.

regards,
p