There are at least 3 firmware versions. The year & checksum can be displayed by pressing f0 on numeric keypad (within the multiface toolkit main menu). The checksum is calculated by XORing all bytes in the ROM with each other.
*Original AMSDOS:
** [[Media:Multiface.two.romantic.robot.86.zip]] - ROM image (1986, chksum=86h)** [[Media:Multiface.two.romantic.robot.3e.amsdos.v05.zip]] - ** [[Media:Multiface.two.romantic.robot.0e.zip]] - ROM image (1988, chksum=0Eh)** [[Media:Multiface.two.romantic.robot.78.amsdos.v05.zip]]** [[Media:Multiface.two.romantic.robot.8d.amsdos.v05.zip]]
* For the Amstrad Plus series:** [[Media:Multiface.two.romantic.robot.8b.zip]] - ROM image (1990, chksum=8Bh)** [[Media:Multiface.two.romantic.robot.78.amsdos.v07.zip]]