This shows the first 10 bytes that "ptr" is pointing to, as character data:
===> EVAL ptr:c 10
This shows the first 10 bytes that "ptr" is pointing to, in hex:
===> EVAL ptr:x 10
This is useful when the pointer is pointing to data that is not readable as
character data--for example, packed data. If ptr is pointing to a packed
field with the value 12345, ptr:x 3 would show you X'12345F'.