Any(home) heating and cooling experts? Thermostat install problem.

So I have changed probably ten thermostats in houses in my life, and I am now deferring to hopefully someone why can help. All my experience has been with 3 wire or 4 thermostats.....this thing has 5. Pics to follow....I pulled off an old round style from the 60's. And nothing was lettered inside....so assuming the new one was just color coded...tossed it asside.
Well...I have found a random combo where the heat wil work. But no AC.
Unit is a gas furnace, with external AC unit. The orange wire was pushed back in the plaster. Not in use.
Rh and rc were originally jumped together. I removed it trying to follow the useless install diagram. So wtf do I have crossed. I feel like an idiot. Lol