Since IBM had patented their keyboard design, Amstrad developed an entirely different keyboard.
The Amstrad keyboard is entirely incompatible with XT and AT keyboards, and can be used only on an Amstrad; conversely, no other keyboard will work on an older Amstrad. This keyboard has a Del key on the keypad, and both Del-> and Del<- keys above the Enter key. The Del-> key has scancode 70. Left of the Enter key a PrtSc/* key. There is an additional Enter key with scancode 74. It is possible to connect a mouse and/or joystick to the keyboard, and then these devices also yield scancodes: 77 (joystick button 1), 78 (joystick button 2), 79 (joystick right), 7a (joystick left), 7b (joystick up), 7c (joystick down), 7d (mouse right), 7e (mouse left).