This MSX system has only 16 KB and one cartridge slot. It is basicaly a Casio PV-7 with 16 KB RAM.
Hopefully an expansion unit (KB-7) was available and added two catridge slots and more memory (8 + 16 = 24 KB) to the PV-16.
The chicklet keyboard is very poor and to small to do anything with it. There are big arrow keys on the right hand side of the keyboard arranged in circle. The whole pad is called "Joypad 1" and emulates a joystick inserted in port #1. The two big blue keys "TR1" and "TR2" on the left hand side of the keyboard are the two fire buttons! Notice that there are also "classic" arrow keys at the top of the keyboard...
We need more info about this computer ! If you designed, used, or have more info about this system,
please send us pictures or anything you might find useful.