    WRITE DIRECT -1, -1, 0xc0
    org 0x4000+0
    db 0xc0

    WRITE DIRECT -1, -1,  0xc4
    org 0x4000+1
    db 0xc4


    WRITE DIRECT -1, -1,  0xc5
    org 0x4000+2
    db 0xc5

    WRITE DIRECT -1, -1,  0xc6
    org 0x4000+3
    db 0xc6


    WRITE DIRECT -1, -1,  0xc7
    org 0x4000+4
    db 0xc7


    BANKSET 0
    assert memory(0x4000 + 0) == 0xC0 

    BANKSET 1
    assert memory(0x4000 + 2) == 0xC5
    assert memory(0x8000 + 3) == 0xC6
    assert memory(0xC000 + 4) == 0xC7