On 13-01-23 06:35 PM, Juan Castro wrote: > On Wed, Jan 23, 2013 at 9:31 PM, William Astle <lost at l-w.ca> wrote: >> >> That is, you can't push the stack pointer onto its own stack. > > Sez who? Signed, the 8086. =P Well, to be fair, you can do a similar effect on the 6809 by doing "STS ,--S". Just not with PSHS. :)