New Features Update
Includes important information about new options
for Power Macintosh G3 minitower and desktop computers
About Your Power Macintosh G3 Computer
Congratulations on purchasing your Macintosh computer. This update addresses the new optional features and components that have become available for Power Macintosh G3 computers since the original manual was printed. It also includes information about features and components that may have been added to your computer as part of Apple Computer’s Build-To-Order program.
About New Options for Power Macintosh G3 Computers
Not all of the options covered in this update are available for all models of Power Macintosh G3 computers. In addition, certain options are only available in specific regions or online through The Apple Store. For more information about features and components available for the Power Macintosh G3, see the Apple Web site at http://www.apple.com/.
Where to Find Information About Your Computer
mFor general information about your Power Macintosh computer, such as setup instructions, connecting equipment, and installing additional memory, see the manual, Setting Up Your Power Macintosh.
mFor general specifications of your Power Macintosh, see the Power Macintosh G3 Technical Information booklet.
mIf the feature or component that you want to find out about is not covered in the setup manual or Technical Information booklet, look in this update.
mIf you still cannot find the information, look on the Internet. Try the following two sites: m Apple Tech Info Library at http://til.info.apple.com/
m The Apple Store at http://store.apple.com/
Important Information About Software
In most cases, all of the software needed to support your Power Macintosh computer has already been installed for you. However, the software to support certain hardware components — such as additional storage devices or PCI expansion cards ordered as part of Apple’s Build-To-Order program — may need to be installed.
This software is provided on one or more CDs that came with your computer. This additional software is not included on your Power Macintosh G3 CD. Follow the instructions provided with the CDs to install any necessary software.
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10/100Base-T Network Connection
If your computer came with the 10/100Base-T Ethernet option, a 10/100Base-T Ethernet card is installed in one of your computer’s PCI slots. You can connect a cable for a 10Base-T or a 100Base-T Ethernet network to this card.
10/100Base-T Ethernet port (RJ-45)
Note: The type of twisted-pair cable you use depends on whether you connect to 10Base-T or 100Base-T Ethernet. Category 5 twisted-pair cable must be used to connect to 100Base-T if you want to get the maximum speed from this connection.
Checking the Status of a 10/100Base-T Network Connection
If you connect your computer to a network using the 10/100Base-T Ethernet card, you can check the card’s LED indicators to monitor network activity. There are four indicators:
mACT (Activity): Blinks when the 10/100Base-T Ethernet card is active
mCOL (Collision): Glows when a network collision has occurred (a temporary condition that occurs when two computers on a network try to send data simultaneously)
mLNK (Link): Glows when a reliable 10 megabit (Mbit) or 100 Mbit network connection has been established
m100Mb: Glows when a reliable 100 Mbit link is established via the 10/100Base-T Ethernet card
Specifications
mOpen Transport: Mac OS 7.5.2 or later, AppleShare, AppleTalk, NetWare for Macintosh, TCP/IP
mConnector: RJ-45 (for 10Base-T and 100Base-T)
mMedia, 10Base-T: Cat 3, 4, or 5 UTP on 2 pairs up to 100 meters (m)
mMedia, 100Base-T: Cat 5 UTP on 2 pairs up to 100 m
mBus interface: PCI revision 2.0 and 2.1, share interrupt A
mChannel speeds: IEEE Auto Negotiation of 10Base-T and 100Base-T
mCommunications: IEEE 802.3u 100Base-T; IEEE 802.3i 10Base-T
mControllers: DECchip 21140, 32-bit internal processor per channel
mPower: 1.2 amperes (A) @ 5 volts ( V ) typical
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Ultra Wide SCSI Hard Disk Drive and PCI Card
If your computer came with an Ultra Wide SCSI hard disk drive, it includes some or all of the following components:
min certain configurations, additional internal Ultra Wide SCSI hard disk drives
man Ultra Wide SCSI card in one of your computer’s PCI slots
man internal Ultra Wide SCSI cable that supports up to three internal devices (including your pre-installed Ultra Wide hard disks)
Warning Do not connect any SCSI devices to the external 68-pin SCSI-3 connector or to the internal 50-pin SCSI-2 connector on the PCI card that supports the internal hard disk. Connecting even one external SCSI device to the external 68-pin connector extends the overall cable length of the SCSI bus beyond the limit for which error-free operation can be guaranteed; the combined length of the internal cable and the external cable reduces the reliability of all the devices connected to the Ultra Wide SCSI bus. Connecting a device to the internal 50-pin SCSI-2 connector will cause your Ultra Wide SCSI devices to transfer data at the slower, SCSI-2 rate.
About the Ultra Wide SCSI Bus
Up to three internal devices can be connected to the Ultra Wide SCSI bus on this card.
All devices on the same SCSI bus must have unique ID numbers, but devices on different SCSI buses may use the same SCSI ID number. (For example, you could have a removable media drive with ID number 3 connected to the computer’s built-in regular SCSI-1 bus and a hard disk with ID number 3 connected to the Ultra Wide SCSI-3 bus.)
The hard disks installed in your computer at the factory and the SCSI card have reserved certain SCSI ID numbers on the Ultra Wide SCSI bus. Other ID numbers are available for assignment to SCSI devices that are added later, as described in the following table.
Ultra Wide SCSI ID Number |
Device |
|
|
0 |
Factory-installed hard disk drive (terminated) |
|
|
1 through 6 |
Available1 |
7 |
SCSI PCI card (terminated) |
|
|
8 through 15 |
Available |
|
|
1If your computer came with two or more Ultra Wide SCSI hard disk drives, use the System Profiler program (available in the Apple menu) to find out the SCSI ID numbers of your drives.
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