Hi Mike
Unfortunately, wrong.
ISA will affect the assembly and binary patterns, also some basic stack operation. You cannot run v1 v1f binary on the adp-ag101 board. You also cannot run v1f on the chip which didn't have floating point unit. So, you cannot run v1f binary on adp-ag101p board. There will decode floating related ISA as non-floating point then lead fault.
In much more detail, v0 has stack conflict will all other toolchain since the program counter register was designed forbidden to access directly in 3 years ago.
V1 and later ISA has a common behavior on stack operation since the program counter is available directly.
However, I don't know if there are parameters to turn-off the floating binary generation in v1f toolchain. Even I don't know if there are parameters to generation v0's binary with v1 toolchain. I think they are defined in compiling time when the toolchain is built.