Apple macintosh ii.iix.iifx 服务手册
Upgrades
1.4 MB Floppy Drive Upgrade for Macintosh II - 10
1 Using an IC extractor,
remove the four ROM
chips from the logic
board.
2 Install the four new ROM
chips on the logic board
as follows:
• HI (342-0639) at
C13
• MED HI (342-0640)
at C12
• MED LO (342-0641)
at E13
• LO (342-0642) at
E12
Note:
The notch at one
end of each ROM chip
Front of Logic Board
Med Hi
Hi
Med Lo
Lo
Lo