Datasheet

2–15
ex n The EPROM erase check (ex n) command verifies that the EPROM is empty. The EPROM is empty
if the contents of all EPROM-memory locations are FFh. The x represents the starting address to
verify that the EPROM has been erased. The n portion of this command will show the number of
bytes that have been erased. The Monitor ceases checking the EPROM if a memory location other
than FFh is detected and displays that memory location as shown in the Figure 2–15.
Check if there is memory space at C040h for 20h Words
Memory location C040h is not erased and is displayed
Enter mC040 20 <ENTER> to start memory mode (to show 20h)
>mC040 20
mem c040 : ffff ffff ffff ffff ffff ffff ffff ffff
mem c050 : 4035 000f 43c5 0030 8315 23fc 4130 ffff
>eC040 20
mem c050 : 4035>
Figure 2–15. EPROM Erase Check Command