request_page := fn(page_count: u8): ^u8 {
    msg := "\{00}\{01}xxxxxxxx\0";
    msg_page_count := msg + 1;
    *msg_page_count = page_count;
    return @eca(^u8, 3, 2, msg, 12);
}

release_page := fn(ptr: ^u8, page_count: u8): void {
    msg := "\{01}\{00}xxxxxxxx\0";
    
    msg_page_count := msg + 1;
    *msg_page_count = page_count;

    msg_ptr := @as(^^u8, @bitcast(msg+2));
    *msg_ptr = ptr;

    return @eca(void, 3, 2, msg, 12);
}