Apple Performa 6400/180 - Manual (Page 186)

Upgrades DRAM DIMM Upgrade - 15
No Resistor at R77
1 Use the graphic here to
locate the R77 resistor
space near the SCSI port
on the logic board.
2 If a resistor does not
occupy the R77
location, as seen in the
picture, the logic board
supports EDO memory.
Top of
Logic Board
R72
R77
R81
R86
R90
R71
R75
R80
R85
R89
R98
R73
R92
R96 R82
R99
R101
R103
R105
no R77