When go32 finds topline in its environment variable, the top screen line will show the following info, from left to right:

R or P (Real or Protected mode)
full path of application program
address of last syscall/page fault
page space used (red)
used physical memory
remaining physical memory
paging reason:
`t'=text `d'=data `b'=bss `m'=malloc `s'=stack `<'=in `>'=out

In DPMI mode, the last 4 items are not shown, as these chores are performed by the DPMI server, not by go32.