Well, I finally soldered up the PV controller, and it is working fairly nicely.

Completed PV Controller:

I'll put up some schematics eventually, but the only difference between this and the dev system article is that there is a 2816 EEPROM and a 74ls373 between the bus on the 8048 and the address lines on the 2816, w/ ALE on the 8048 connected to the LE pin on the 74ls373.

Closeup 1 of PV Controller

Closeup 2 of PV Controller