25 Jul
2002
25 Jul
'02
7:44 a.m.
From: "Eric Smith" <eric(a)brouhaha.com>
Dwight Elvey wrote:
Hi
First, there was an error in my previous list.
The 0D9h does a RET and not a CALL.
I looked at a Intel 8080A last night. All of
the codes seemed to do the same. The values
in the PSW were different. On the Intel part,
bits 5 and 3 always returned '0' while bit
1 always returned '1'. Compared to the NEC
that always returned '1' on both 1 and 3
but had the -/+ on bit 5.
Dwight
I started to look and see what hidden
codes might be in this processor.
Is that different than what an Intel 8080A does?
The undefined opcodes of the Intel 8085 are
rather more interesting, I'm told.