I'm working with the 8085 for hobby stuff. I'm using a standard 74HCT138 decoder and the straight thru 74HCT573 version of the 373. Having built a few I notice at the end of instruction cycles I get an unexpected higher order address. Not from my software. And the lengthier the program the more of them.
The micro is not reading or writing at those times. So I guess it's OK but I'd like to know what it is. The problem has not caused difficulty with whatever I am having the micro do so far as I know.
I'm using wiring not printed circuit and tried different schemes. I don't think it's stray pickup or noise from improper decoupling. Was the 8085 known for a DON'T CARE address state? I thought I would reach out to the Forum and see if someone remembers the 8085. Honestly, I'd like to put the issue to bed.
The micro is not reading or writing at those times. So I guess it's OK but I'd like to know what it is. The problem has not caused difficulty with whatever I am having the micro do so far as I know.
I'm using wiring not printed circuit and tried different schemes. I don't think it's stray pickup or noise from improper decoupling. Was the 8085 known for a DON'T CARE address state? I thought I would reach out to the Forum and see if someone remembers the 8085. Honestly, I'd like to put the issue to bed.