Quote Originally Posted by dave w View Post
Attached is a $OE .bin I've used in an Ostrich 2 Emulator. I did not need to change the mask ID with the Ostrich 2. The attached BHDC .bin has been modified from it's original code!

dave w
It doesn't matter whether you are using an Ostrich or an Auto Prom, while emulating, the checksum has to be disabled.

Sometimes you can still make changes and see some response while doing so without disabling checksum, but it won't be right. I had this happen on a '7060 using $85, then remembered after the tuning session about disabling checksum (first tune of the year), went back in and in minutes was running much better after disabling checksum.