From BASIC-G MANUAL [ 1983/3 ]

Memory map

Memory bank

ROM
0000h-5fFFh
6000h-6fFFh
7000h-FFFFh

Detailed Memory map

 
0000h - 1fFFh M5 MONITOR (Internal ROM 8KB)
2000h - 3fFFh External ROM Cartride (MAX 16KB)
6000h - 6fFFh Reserve Area
7000h - 7fFFh Internal RAM (4KB)
8000h - FFFFh External RAM Cartride (MAX 8KB)
OR

32k Expand Box (MAX 32KB)