Try 2400 baud.... Divisor is at address offset 3a (address) f33a in the 64k version.
(Should be 0dh for 9600 baud which is the highest in common with a pc).
I think you are getting close. Don't forget most of the 64k image and all of the 32k image should be preserved across reset. So with the 32k image you can take the disk out hit reset and then look at what is in memory. You have always got my emulator for comparison
.