F77 for 11/70's without FPP

[utzoo!decvax!wivax!dyer]

I was in the process of performing several benchmarks on F77 on different
processors, and was all ready to try an 11/70 without a FPU.  Unfortunately,
the scheme used by PDP-11 UNIX to support floating-point emulation will not
run when the program is linked split I/D.   My benchmark program doesn't
need I/D, but f77pass1 sure does.  I am using this 11/70 only by the good
graces of its owners, and cannot muck with the kernel to support a
"fetchi" system call, not can I cut the jumper on the Mem Mgt board
to allow "mfpi" to work.

Has anyone already solved this problem?  Either shrinking f77 to avoid
I/D or modifying the compiler to directly call the emulator would do.
Please post your responses to either:
"decvax!wivax!dyer" or "sdyer at bbn-unix"

Thanks.