After hunting around old forum posts, I still can't quite get my initialization correct for EEPROM. FYI, the part I am using is MK61FX512VMJ15.
It appears that this device can have up to 16k of EEPROM, and I want to use it all. From referencing the manual, it appears I need to set the following:
FCCOB5 = 0x08 (EEPROM backup needs to be 16x the size of the space I need, which gets me to 256 kB of backup)
FCCOB4 = 0x30 (8192 + 8192 subsystem size)
FCCOB0 = 0x80 (PGMPART command)
This however is only allowing my to write 4k of EEPROM (from 0x1400.0000 to 0x1400.0FFF) when I believe it should allow me to write 16k (from 0x1400.0000 to 0x1400.3FFF).
Anyone have any ideas?