From the link: "Most 80C51 opcodes (including nearly all bit and jump instructions) can be emulated by Softhooks® without changes. Even if changes are necessary, a Softhook® compatible program typically is only a few bytes larger than the original program."

Only a few bytes ... so someone is only a little bit pregnant.

Another issue: can you "fly what you test" or do you need to remove the "few bytes" to ship a product?

That is NOT a true emulator. The first line in specigfying an emulator is the emulator will NOT affect normal operations

However, if the price is low enough (<$100) it can, I'm sure do as well as a simulator with the advantage of running on the real hardware. Thus it may have price/performance relevance.

HOWEVER, I would be very wary, any company that will not list their prices, makes me unconmfortable. Maybe Andree can state the price.

Erik