|
|
|||
TITLE
|
|
||
TOPIC
What external expansion ports are available on the Power Macintosh G3?
DISCUSSION
- Ability to daisy chain up to 63 devices to your Mac or PC (with connecting cable lengths of up to 14 feet).
- Hot-pluggable so you do not have to turn off a scanner or CD drive to connect or disconnect it, and you do not need to restart your computer once you have made the connection.
- FireWire devices are easy to connect (you do not need device IDs, jumpers, dip switches, screws, latches or terminators).
Figure 1:
Power Macintosh G3 (Blue and White) ports.
Line Voltage
The power supply is not self-configuring for different input voltages. The voltage switch is delivered preconfigured for the input voltage of the region in which the unit is originally purchased. If the computer is moved to another location where the input voltage is different, the voltage switch must be adjusted to accommodate the voltage change. The switch has two positions that support voltage ranges of 100 to 130 V or 220 to 270 V.
Monitor Power
The monitor power socket is not switched. Any time power is connected to the power supply, power is available on the monitor power socket. A monitor that does not support energy saving features that is connected to the monitor power socket will not power off when the computer is shut down. Monitors that do not support energy saving features have to be switched manually.
10/100 Ethernet
Figure 2:
10/100 Ethernet marking
The Power Macintosh G3 computer has an auto-switching 10 or 100 Megabit Ethernet. This port only accepts twisted pair Ethernet cables (also called 10 Base-T).
USB Ports and Devices
Figure 3
: USB Ports and Devices marking
The USB ports take the place of the serial I/O ports found on earlier Macintosh computers. Software shims have been implemented in the system software to allow existing applications that use ADB devices to work with USB devices. The Power Macintosh G3 computer uses a USB keyboard and mouse similar to the USB keyboard and mouse introduced with the iMac computer. USB game controllers are supported by the InputSprocket component of the Apple Game Sprockets software architecture. InputSprocket software and information about the InputSprocket APIs can be found at:
http://developer.apple.com/dev/games/
FireWire
Figure 4 : FireWire marking
The Power Macintosh G3 has two FireWire ports for connecting high speed peripherals such as cameras, scanners, disk drives, or home entertainment systems. At 200 Mbps, it is up to 20 times faster than an Ethernet network connection. Here are some other benefits:
Apple Desktop Bus (ADB)
One ADB port is included, for attaching ADB devices such as keyboards and mice.
Sound In/Sound Out
There is a sound in port and a sound out port. These ports can be used to connect with external microphones and speakers.
No SCSI Ports
The Power Macintosh G3 computer does not include built-in internal or external SCSI device connectors. Adding an internal or external SCSI device requires the use of a SCSI PCI card. Ultra2 SCSI (LVD) devices and PCI controller cards will be available as options at the time of purchase.
No LocalTalk Serial Ports
The Power Macintosh G3 computer does not include RS-422 serial ports found on earlier Macintosh models. I/O for external devices is provided by two USB ports. USB adapters are available from third parties to support Macintosh compatible legacy serial devices.