# hh are hex digits of output:
# 00-ff actual hex data (bold for stuff we entered)
# 0-f under cursor: one digit entered, need the next
# hh are hex digits of output:
# 00-ff actual hex data (bold for stuff we entered)
# 0-f under cursor: one digit entered, need the next
# nyi:
# G-Z record last bytes we transmitted and store in memory
# if we were halfway through a hex byte, first digit
# nyi:
# G-Z record last bytes we transmitted and store in memory
# if we were halfway through a hex byte, first digit