HD6475368CP Datasheet, PDF (41/108 Pages) Agilent(Hewlett-Packard) – H8/536 Emulator PC Interface

When you specify step counts greater than 1, only the last register
contents are displayed.
Modifying Memory
The preceding step commands show the sample program is executing
in the Scan loop, where it continually reads the command input byte to
check if a command has been entered. To simulate the entry of a
sample program command, you can modify the command input byte by
selecting:
Memory, Modify, Byte
Now enter the address of the memory location to be modified, an equal
sign, and new value of that location, for example, "Cmd_Input=41".
(The Cmd_Input label was defined as a global symbol in the source
file.)
To verify that 41 hex was indeed written to Cmd_Input (FC00 hex),
select:
Memory, Display, Byte
Getting Started 2-43