I thought they were prom write once. Even MTH did not rewrite to them. I understand UV and such, but these chips did not have a rewriteable section as far as I know. They have the data and commands that the processor uses to execute routines. The processor top board had the storeable data from the shutdown. There is another memory chip through hole on the board (going from deep memory here). For example, if you had an engine with an ID problem (deselect), and pulled the chip and put it into a new top board the engine would work. And if you put another new chip, that had not been deselected but the same version chip into your deselect engine top board, it would not work. The top board is what had the deselect. Not the PROM chip. G
|
|
