I have an apple II, arduino mega, and a modern PC all wired up the RS232 out of the apple hits a MAX232 and goes into the serial 1 of the MEGA, the MEGA then simply spits out what it reads on serial one back to the PC the problem is its printing out wrong values, I hit H on the apple and it spits …

Confused with serial

nickgammon September 22, 2012, 12:30am 11

Osgeld:

Do you have a scope or logic analyzer?

yes

And? What does it show?