4 record length: 15 (32K)
5 mfrl signed short in MST
12 db size(record position): 29 bit (512M)
13 xrmfb/xrmfp 20+9 in XRF
16 IFP word count: 16 bit
21 #characters PFT: 10000
22 #characters PFT result: 64000
25 record length: 24 bits (16M)
27 index size: 32+13 bit (4G*8K blocks = 32T)
28 mfn: 32+8bit (256 databases per 4G records)
30 this needs 64 bit xrf (40pos+24len)