Hi. I've been looking into the cpc_rs232 amstrad/pace interface and the COMMSTAR Rom software. It seems that the software won't run due to the ring indicator bit 4 of RR0 being high when it's expected to be 0. The software works if RR0 bit 4 is set low. Line 55 in /devices/bus/cpc/cpc_rs232.cpp wher...