the Amstrad CPC under FutureOS in Small-C.
compile Compile (under CP/M):
A>cc -M ftest
COMFU.COM converts FTEST.COM to FTEST.SMC
by appending an 128 byte FutureOS header.
Start (under FutureOS):
RUN the RUNC.64K file, then
RUN any .SMC application, like FTEST.SMC (this here)
*/