No. The AS-E908-031 executive cartridge are not compatible with the PC-E984-X8X at any prom combo. If a user is migrating from a PC-0984-X8X controller to a PC-E984-X8X controller and if the executive cartridge in the S908 Remote I/O module is a AS-E908-031, then the user must purchase a new executive cartridge. The current part number is AS-E908-131. Its current prom combo is 1011. The minimum prom combo required for the AS-E908-131 executive cartridge to be compatible with the PC-E984-X8X controller is 1007.