9 Feb
2018
9 Feb
'18
11:43 a.m.
On 02/09/2018 10:57 AM, Warner Losh via cctalk wrote:
For those that don't want to read through the
entire datasheet,
https://electronicerror.blogspot.com/2007/08/undocumented-flags-and-instruc…
has a good summary.
RIM and SIM were always documented for the 8085. Not doing so would
have made it difficult to use the added features, such as "half" and
TRAP interrupts, in addition to bit-bang serial I/O.
In the Calmos document cited by Al, the discussion of added flags and
instructions begins on PDF page 39 and is much clearer.
--Chuck