sysman user information is located on 0x1D6099 

other user is located on 0x5c9400

CRC for David Junior II

width=32  poly=0x5140c101  init=0xb7eac099  refin=false  refout=false  xorout=0x6ffe64ba  check=0x3084754d  residue=0xc96698a2  name=(none)

MICA 540T,Micropolis 40MB, 4 disc, 6 heads, 32 sectors/track,256 byte/sector, 830 cylinders (not standard formated)

The address of the Catnet system is in the eprom CATNET_1.6_468.bin at address 0x07c0