sysdata:

s.nxfblk: .=.+1 " pointer to next free block??

s.uniq: .=.+1 " next unique value

s.ddrive: .=.+1 " set channel to diamond_drive

s.tim: .=.+2 " (up?)time in 60Hz ticks (low,high)

" process table

" first word

" bits 0:2 -- status

0: free slot

1: in/ready

2: in/notready

3: out/ready

4: out/notready??