Pinout for Port Registers on Arduino Mega??

hi there,

my arduino program uses port registers extensively (portb, portd, etc).  currently, merging work of several arduino diecimilas onto 1 arduino mega can't find conclusive information how mega pinout corresponds higher port registers (porte, portf, etc).  i see port registers referenced on 1280 data sheet , in arduino avr code libraries, use assistance.

would please point me in right direction?

thank you!
christopher baker
christopherbaker.net

i posted spreadsheet here may help: http://spreadsheets.google.com/pub?key=rthw_r6evl140ks9_g8gpka&gid=0

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