Apple iMac - Manual (Page 22)

C H A P T E R 2
Architecture
22
The components at the heart of the iMac computer reside on two printed-circuit
boards: the main logic board and the processor module. The Figure 2-1 is a
block diagram showing the major components on those boards. The
components shown are described in the sections that follow.
Figure 2-1 Block diagram
Power switch
and LED
Sound in
Sound out
IrDA board
Rage IIc
video
DAC
Internal
video
monitor
SGRAM
Cuda
power
manager
IC
Internal IDE
disk drive
PCI bus
Main logic board
SGRAM
SO-DIMM
Processor module
Grackle
memory
controller
and PCI
bus bridge
PowerPC
G3
micro-
processor
512 KB
Backside
L2 cache
Address
Data
ROM
RAM
RAM
SO-DIMM
RAM
SO-DIMM
Modem module
Telephone
connector
Internal
CD-ROM drive
Ethernet
connector
Internal
microphone
Speakers
Headphone
jack board
ST10040
Ethernet IC
Datapump DAA
Paddington
I/O and
disk
controller
Burgundy
sound I/O
USB port 1
USB port 2
USB IC
Modem
controller