8085 vs 8085A

[river]

Hi,

I was looking through my collection yesterday and was testing out an old
Intel SDK85 system. I noticed the main processor is stamped 8085, which
means this chip is either an 8085 or the "A" was not printed properly and
the chip is really an 8085A.

I have a few 8085 systems and a box of 8085 CPUs. I checked them all and
every one of them is an 8085A. I don't think I have ever seen an 8085,
they've all been 8085A types.

Other than the stamp on the chip, is there anyway I can tell the difference
between an 8085 and an 8085A? Furthermore, is the 8085 rare, and I should
put the chip away, or is it nothing special?

Why did Intel bring out the 8085A? Were there issues with the 8085?

Seeyuzz
River