Emax

Hello everybody, i'm a french boy and it's the first time, i write on 
this forum : I am a "new" user of Emax II Rack Turbo 8Mo RAM + 3HDD 
and OS 2.14...
Well, i don't understand somethings :
1- Memory
Without any bank/presets/samples, i have 4194260 memory remaining : 
ok. I just do double (why ?) these number to find my 8 Mo RAM...
Now i load a bank. So, I'm going to see how much of memory is 
remaining : The display says to me : 3927937...
My question is : To know memory bank use do i must : (4194260-3927937)
x2 = 532646 that is to say #500ko ?

2- SCSI Boot (MASTER9+6)
I activate this fonction and choice a HDD...
When i switch on the emax, I can't load first HDD.
Can i have directly HDD when i switch on emax or i must use the FDD ?


3- Northstar CD for Emax2
Which of the 3 CD's is very interesting ?
In fact, i'm search acoustic instruments which use lot of memory.


Well, thanks for your answer and excuse me for my bad 
english/american language...