Mark Pizzolato wrote: > this certainly could easily solved by setting the RAM in the system to > 64K and merely loading the ROM data into the appropriate address > range.
I tried this, but got: Address space exceeded I have "set cpu 64k". But sys_load checks address 166000, and ADDR_IS_MEM is not happy. I'm looking at how the SIMH PDP-11 cpu does an instruction fetch. It seems to go through ReadE, which will use iopageR if necessary. I think it should be possible to make a ROM device with an address range in the IO page. _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh