C64 Component Locations
-----------------------
                            Old boards                      New boards
             Original  #250407 #250425 #250441 #250466  #250469R4 #250469RB

 4066
 (paddles)      ?           U28           ?      U28           U18
 4066
 (ColorRAM)     ?           U16           ?      U16           U21
 556            ?           U20           ?      U20            -
 7406           ?            U8           ?      U8            U22
 BASIC ROM      ?            U3           ?      U3     U4 (incl. Kernal)
 Character
 ROM            ?            U5           ?      U5             U5
 CIA #1
 ($dc00)                U1                ?                 U1
 CIA #2
 ($dd00)                U2                ?                 U2
 Color RAM      ?            U6           ?      U6       U19        -
 CPU                    U7                ?      U7             U6

 DRAM           ?           U9-12         ?    U9-U10         U10-11
                           U21-24
 Kernal ROM     ?            U4           ?      U4      U4 (incl. BASIC)
 MMU                     -                ?       -             U8
 PLA                    U17               ?      U17            -
 SID                    U18               ?      U18            U9
 VIC-II         ?           U19           ?      U19            U7


Author: Marc-Jano Knopp <mjk@c64.org> on 87/2/25
Source: http://mjk.c64.org/