>>Try
>>set -o vi
>>
>>then "<esc>-" should give the previous command.

if you're too lazy to press esc everytime, these commands also should do
the trick

set -o emacs
alias -x __A=$(print '\020')
alias -x __B=$(print '\016')
alias -x __D=$(print '\002')
alias -x __C=$(print '\006')


br,
Ivars