Dataman S4 Manual page 45

DATAMAN S4 MANUAL
4. The software runs at full-speed.
5. Memory contents can be inspected, edited and
the program started
again very quickly.
6. It is very cheap and effective with single-chip
microcontrollers
which have a piggy-back version. You plug it
straight into the back
of the microprocessor.
7. It is good for making modifications to existing
systems, such as
changing messages and odd values, especially
where some trial and
error is involved. The "tweak values and try it
again" process works
very well.
8. When successful the program can be transferred
to an EPROM immediately.
How Memory Emulation works
The method used is to assemble the program on a
computer and download
in one of the standard file-formats into the
emulator. The Memory-Emulator
will do most things that an Microprocessor
Development System can
do, and most MDSs do not have editors and code
manipulators which
are as powerful as those of S4. S4 will not do
anything microprocessor-specific - but
it is not usually too difficult to write a routine in
the code of
the target-microprocessor, whereby a subroutine-
call or software-interrupt
may be substituted for any instruction, and the
microprocessors registers
EMULATE KEY 45