[NPL] Sonnet G3 Upgrade Compatibility
TweetFollow Us on Twitter

[NPL] Sonnet G3 Upgrade Compatibility

G3 UPGRADE CARD COMPATIBILITY

A recent MacWeek article brought focus to what has been, for some, a
suspicion of compatibility problems between PowerPC G3 (750) processor
upgrade cards and the ROMs in PowerPC 601/604/604e-based systems. We
feel this story rightfully identified one potential for incompatibility,
but did
not adequately address Sonnet's superior approach to compatibility
assurance. We would like to shed additional light on this topic and make sure
that our customers understand what steps Sonnet takes early in the
development of our Crescendo G3 products to insure compatibility.

Sonnet Capability

It is worth establishing Sonnet's credibility in this matter as a preface
to the
discussion. Sonnet had been designing and manufacturing its own upgrade
cards for 12 years. Sonnet's staff includes the former director of hardware
engineering at DayStar Digital, the former director of software engineering
at Applied Engineering, and engineers for the Macintosh 604e multiprocessor
card and Macintosh video conferencing hardware among other projects.

Background

The primary focus of the MacWeek article deals with the speculative
processing characteristics of the Power PC 750 Microprocessor and its
potential for random incompatibility with the I/O functions of older Power
Macintosh models. In the article both Sonnet and Newer are quoted to have
engineered a fix for the problem, albeit through different approaches. What
was left out of the story was the detail of which I/O devices are at risk of
incompatibility, why they become vulnerable at different times (system boot
versus application execution), how this varies by Power Mac platform
(NuBus Mac, PCI Mac), and what type of solution is actually required for
each condition.

Technical Background

Both the 750 and 604 do speculative execution, i.e. they guess at the way a
branch instruction will go, and then will execute the next instructions along
this path. However, they do not commit any results to the destination until
the branch is resolved. Speculative execution in itself cannot cause a problem.
Memory prefetching, which the 750 does to a greater extent than the 604, is a
bus interface operation in which the bus unit executes a read that may or may
not be committed to final use. If it is not committed, it may be fetched again.
This may result in lost data from an I/O device only if the I/O device throws
the data away after being read. Most modern I/O devices do not have a
problem with modern processor prefetch operations. Status registers do not
change just because they are read. Data transfers that do change upon read
are directly transferred to memory (DMA) without processor intervention or
speculative prefetches.

What about the few I/O devices that may have a problem with prefetches?
The problem can be readily solved in software, and can be solved at a global
level or at a local level. At the global level the G3 kernel environment is
set up
to prevent inappropriate memory prefetching for all I/O devices. At the local
level, a well-written I/O software driver will equally prevent inappropriate
memory prefetching.

Levels Of Compatibility In PCI Power Macintoshes

The MacWeek article did not explicitly state, but implied a discussion about
PCI Mac upgrade cards. Only two companies, including Sonnet, have
demonstrated the engineering capability to engineer G3 upgrade cards for
NuBus Macs. We will discuss NuBus upgrades separately below. To
understand compatibility in PCI Macs, Sonnet has broken it down into three
levels.

* 100% G3 compatible -- as is.
* 100% G3 compatible -- G3 kernel setup
* Not G3 compatible.

100% G3 compatible--as is.

Application software that is compatible with an
Apple Power Mac G3, and Mac OS through 8.5 is 100% compatible with a G3
upgrade card (except for dependencies on third-party hardware as we will
discuss later).

Extensive testing has shown that all Power Macintosh motherboard
hardware with current Apple drivers can boot with full reliability with G3
upgrade cards.

How can we assure these strong compatibility statements? Sonnet has done
extensive and sophisticated testing of standard Apple disk drivers for
compatibility with Sonnet G3 upgrade cards. Nevertheless, the best
assurance is a Sonnet installed base of the tens of thousands of G3 cards
without a related trouble report. As the number of trouble-free installations
go up, the probability that a problem exists goes down--way down.

100% G3 compatible--G3 kernel setup.

Many third-party hardware vendors
do not have G3 clean drivers and require a global G3 clean environment for
proper operation. Sonnet and NewerTech have developed software that sets
up the G3 kernel when the Mac OS boots to insure a clean G3 environment
for those hardware drivers that may not be G3 clean.

For example, some third-party video capture hardware/software systems do
not have a G3 clean driver. A G3 clean kernel makes these cards work in spite
of their local faults.

So what's the difference between Sonnet's and NewerTech's approach?
Sonnet sets up the G3 kernel from a software extension; Newer sets up the
G3 kernel from software in ROM on the G3 card. Why has Sonnet chosen this
approach?

Because Apple hardware and OS boot software are G3 clean, setting up the
G3 kernel from ROM instead of from an extension is not needed and has two
major disadvantages:

1) ROM adds unnecessary cost. Sonnet believes that the user should get
reliable AND cost-effective hardware. We leave it to the customers to
find superior cost-effectiveness in Sonnet Crescendo G3 cards.

2) ROM-based software, such as the NewerTech approach, requires
shipping the card to the factory if an update is needed. Sonnet believes
that software updates for the customers should be free and easy-to-obtain.
Sonnet software updates are posted on our web site.

NewerTech has at least two ROM versions in the field and perhaps
more. For example, an extract from the NewerTech web site:

Q. I am using an Adaptec Ultra-Wide SCSI. I get an empty gray
startup screen.

A. You have an early revision of the MAXpowr G3 that needs to
be modified. Please contact Newer Technology Technical Support
for an RMA.

Sonnet can update our customers by posting software to the web site. How
many times will NewerTech customers need to ship their cards back to the
factory?

Are there any disadvantages to the Sonnet approach? Yes, there is one
disadvantage, but it is only a temporary one. From all of Sonnet's testing and
our customers experiences, there is only one case where a G3 environment
loaded from ROM is currently needed. The Adaptec Power Domain 2940 and
3940 Ultra-Wide SCSI controllers using current version 3.0 firmware are not
G3 clean unless the G3 kernel is already set up. (The Adaptec controllers work
fine in all non-processor-upgraded Macintosh systems including G3 Macs.)
Contrary to NewerTech's suggestion, however, a speculative read causes the
Adaptec controller to hang at the very first access and has never damaged
any data to our knowledge. Sonnet's choice for the customer was to either
add ROM and cost to our card, or to work with Adaptec engineering so that
Adaptec could update their firmware. Indeed, Sonnet and Adaptec have been
testing Version 4 firmware for some time, are about to release it to beta test,
and expect an official release in January 1999. Adaptec firmware is contained
in FLASH ROM and is user updatable with a software utility.

Devices that are not G3 compatible at all.

There are some hardware upgrade cards, such as one video capture card of
which we are aware, that have additional G3 issues that render them
incompatible with Apple G3 Power Macintoshes and Power Macintoshes with G3
upgrades. If they are to be fixed, the responsibility remains with the
manufacturer.
Compatibility In NuBus Power Macintoshes

G3 upgrades for NuBus Power Macintoshes render the debate moot. Only
Sonnet and NewerTech manufacture G3 upgrades for NuBus Power Macs.
We both take the same approach. We boot from the motherboard 601 in the
6100, 7100, or 8100, we set up the G3 kernel, then we turn on the G3. Our
competitor has used ROM cost as the justification for higher prices for PCI
Mac G3 upgrades. How can our competitor justify higher prices than Sonnet
for NuBus Mac G3 upgrades?

Of course, there are some NuBus upgrade cards that are not G3 compatible.
The respective manufacturers have long since lost interest in making these
mostly-obsolete cards G3 compatible. Sonnet is actively working on behalf of
our customers to fix some third-party cards that are not G3 compatible.

What MacWeek Missed

An article about compatibility would be incomplete without discussing
reliability. Sonnet's trademarked slogan is "Simply Fast". Sonnet believes
that a user should have no concerns about compatibility or reliability.
Consequently Sonnet products are easy to install--no switches, no jumpers,
no control panels. Plug it in, run a software installer, and restart. Why
do our
competitors have switches, jumpers, and/or control panels? Our competitors
allow the user to attempt to push the CPU speed, cache speed, and/or
memory speed above the manufacturer's rated specifications. At first glance,
one may think that getting more speed from a chip, potentially underrated by
the manufacturer, would be like getting free performance. It may also be a
ticket to system crashes AND data corruption.

What are the technical issues of allowing the user to fiddle with the speeds?
What's wrong with, "Let's push it above rated specifications until it crashes
and then back off a little?" NewerTech even automates the process with a
control panel that will help you push the SRAM speed unless the G3 does not
pass a trivial one-second diagnostic with the speed pushed.

First, Motorola, IBM and the SRAM manufacturers specify operating speed
over a temperature range. In general, as temperature increases, the top
speed of a processor or SRAM decreases. What would you think if you set up
your machine to run above rated speed on a cool day and the next warm day
your system starts crashing? Would you think, I need to open the Power mac
and adjust down the speed switches? Would you call your reseller for
technical support?

Second, according to the top PowerPC design engineers at IBM, high-end
processor speed degrades slightly over time. This degradation is limited,
well-characterized, and allowed for in the speed designation on the PowerPC
750 (G3) processors. A processor pushed above manufacturer's specifications
today, may not work reliably in six months! Furthermore, according to IBM,
the computer may lose data integrity well before losing system integrity. In
other words, the user may lose mission critical data and not know it.

Conclusion

We believe in what we sell. Sonnet runs its own G3 cards in its servers backed
up with Dantz Retrospect software, and in workstations throughout the
company, including several with Adaptec SCSI controllers (version 4
firmware, of course). Sonnet backs all its products with an industry-leading
three-year warranty.

Sonnet has shipped tens of thousands of Crescendo G3 upgrade cards with
fewer than one-half of one per cent experiencing any kind of compatibility
issues. Except for a couple of early-on reported bugs, that were all quickly
fixed, the subsequent issues have been third-party device specific and many of
those have been resolved through regular updates to our software. We have
not had a single report or experience of data corruption on a hard drive with
our G3 kernel software. Sonnet believes that our users will experience easier
installation than with any of our competitors, bullet-proof reliability, and
near 100% compatibility. Sonnet preconfigures reliable bus speeds, cache
ratios, and CPU speeds, consistent with manufacturer specifications. Sonnet
tests every card at the factory. This approach should dramatically decrease
end user frustrations, protect their data integrity, and alleviate the need to
place a technical support call.

Sincerely,

Robert Farnsworth
President
Sonnet Technologies

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

iWatermark Pro 1.72 - Easily add waterma...
iWatermark Pro is the essential watermarking app for professional, business, and personal use. iWatermark, is the number 1 and only watermarking tool available for all 4 platforms iPhone/iPad, Mac,... Read more
RapidWeaver 6.3 - Create template-based...
RapidWeaver is a next-generation Web design application to help you easily create professional-looking Web sites in minutes. No knowledge of complex code is required, RapidWeaver will take care of... Read more
Adobe Photoshop CC 2015 16.0.1 - Profess...
Photoshop CC 2015 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Photoshop customer). Photoshop CS6 is still available for purchase (... Read more
Together 3.4.6 - Store and organize all...
Together helps you organize your Mac, giving you the ability to store, edit and preview your files in a single clean, uncluttered interface. Smart storage. With simple drag-and-drop functionality,... Read more
Monosnap 3.1.0 - Versatile screenshot ut...
Monosnap lets you capture screenshots, share files, and record video and .gifs! Capture: Capture full screen, just part of the screen, or a selected window Make your crop area pixel perfect with... Read more
Cocktail 8.5.1 - General maintenance and...
Cocktail is a general purpose utility for OS X that lets you clean, repair and optimize your Mac. It is a powerful digital toolset that helps hundreds of thousands of Mac users around the world get... Read more
Vienna 3.0.6 :5eaf312: - RSS and Atom ne...
Vienna is a freeware and Open-Source RSS/Atom newsreader with article storage and management via a SQLite database, written in Objective-C and Cocoa, for the OS X operating system. It provides... Read more
Kodi 15.1.rc1 - Powerful media center to...
Kodi (was XBMC) is an award-winning free and open-source (GPL) software media player and entertainment hub that can be installed on Linux, OS X, Windows, iOS, and Android, featuring a 10-foot user... Read more
Bookends 12.5.8 - Reference management a...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Access the power of Bookends directly from Mellel, Nisus Writer Pro, or MS Word (... Read more
Chromium 44.0.2403.125 - Fast and stable...
Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. Version 44.0.2403.125: This release contains a number... Read more

This Week at 148Apps: July 27-31, 2015
Winding Down July With 148Apps How do you know what apps are worth your time and money? Just look to the review team at 148Apps. We sort through the chaos and find the apps you're looking for. The ones we love become Editor’s Choice, standing out... | Read more »
You'll Want to Keep an Eye Out for...
If you're the kind of person who had fun hunting down and completing all the codex puzzles in Assassin's Creed 2, then are you ever in for a treat. The Guides looks like it's going to be a very robust collection of similarily odd, seemingly... | Read more »
Vivid Games has Announced Real Boxing 2...
The original Real Boxing was a pretty impressive bit of fisticuffs, but if the trailer Vivid Games is showing off for GamesCom is any indication Real Boxing 2 is going to be even better. [Read more] | Read more »
PAC-MAN Championship Edition DX - Tips,...
[Read more] | Read more »
Card King: Dragon Wars - Tips, Tricks an...
[Read more] | Read more »
Pac-Man Championship Edition DX has brou...
Bandai Namco has released Pac-Man Championship Edition DX on iOS and Android, which features the classic arcade gameplay that we've all grown to love. Pac-Man Championship Edition DX can be enjoyed in much shorter bursts than the arcade versions... | Read more »
Cosmonautica (Games)
Cosmonautica 1.1 Device: iOS Universal Category: Games Price: $6.99, Version: 1.1 (iTunes) Description: Cast off! Are you ready for some hilarious adventures in outer space? | Read more »
Rescue humanity from a Demon horde in An...
Angel Stone is Fincon's follow up to the massively successful Hello Hero and is out now on iOS and Android. You play as a member of The Resistance, a group of mighty human warriors who have risen up in defiance of the Demon horde threatening to... | Read more »
Gallery Doctor (Photography)
Gallery Doctor 1.0 Device: iOS iPhone Category: Photography Price: $2.99, Version: 1.0 (iTunes) Description: Free up valuable iCloud and iPhone storage with Gallery Doctor, the only iPhone cleaner that automatically identifies the... | Read more »
You Against Me (Games)
You Against Me 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: A simple game… You. Me. Claim, steal, lock, score, win! | Read more »

Price Scanner via MacPrices.net

PDF Element Tool Kit For PDF For Windows 10,...
South Surrey, British Columbia based software developer Wondershare has posted an interesting infographic tracking the development of Microsoft’s flagship Windows operating system over the years,... Read more
27-inch 3.5GHz 5K iMac on sale for $81 off MS...
Adorama has the 27″ 3.5GHz 5K iMac on sale for $2218, $81 off MSRP, including a free copy of Apple’s 3-Year AppleCare Protection Plan. Shipping is free, and Adorama charges sales tax in NY & NJ... Read more
Back-to-School with Tablet and Smartphone Acc...
Belkin helps you prepare for the coming school year with a wide variety of the latest mobile and tablet accessories to outfit both grade school and college students. The line-up includes charging... Read more
11-inch MacBook Airs on sale for $100 off MSR...
Best Buy has 11-inch MacBook Airs on sale for $100 off MSRP. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store prices may vary: - 11″ 1.6GHz... Read more
iPad Air 2 on sale for up to $100 off MSRP
Best Buy has iPad Air 2s on sale for up to $100 off MSRP on their online store for a limited time. Choose free shipping or free local store pickup (if available). Sale prices available for online... Read more
Sale! 13-inch MacBook Pros on sale for $100 o...
B&H Photo has 13″ MacBook Pros on sale for $100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.5GHz/500GB MacBook Pro: $999.99 save $100 - 13″ 2.7GHz/128GB Retina... Read more
Sale! Save $100 on 13-inch MacBook Airs this...
B&H Photo has the 13″ 1.6GHz/128GB MacBook Air on sale for $899.99 including free shipping plus NY tax only. Their price is $100 off MSRP, and it’s the lowest price available for this model.... Read more
Worldwide Tablet Market Decline Continues, Ap...
The worldwide tablet market declined -7.0% year-over-year in the second quarter of 2015 (2Q15) with shipments totaling 44.7 million units according to preliminary data from the International Data... Read more
TP-LINK TL-PA8030P KIT Powerline Featuring Ho...
Consumer and business networking products provider TP-LINK is now shipping its TL-PA8030P KIT AV1200 3-Port Gigabit Passthrough Powerline Starter Kit that expands your home’s network over its... Read more
Apple refurbished iPad Air 2s available for u...
The Apple Store has Apple Certified Refurbished iPad Air 2s available for up to $140 off the price of new models. Apple’s one-year warranty is included with each model, and shipping is free: - 128GB... Read more

Jobs Board

*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Infrastructure Engineer - *Apple* /Mac - Hil...
Infrastructure Engineer - Apple /Mac Job Code: 1608 # of openings: 1 Description Our fortune 500 client is looking to hire an experienced Infrastructure Engineer to join Read more
Executive Administrative Assistant, *Apple*...
…supporting presentation development for senior leadership. * User experience with Apple hardware and software is preferred. Additional Requirements The following list Read more
*Apple* Bus Company is now hirin - Apple Bus...
Apple Bus Company is now hiring school bus drivers in the Pettis County area. Class B CDL preferred. Free training provided. No nights or weekends required. Flexible Read more
*Apple* Certified Mac Technician - Updated 6...
…and friendly, hands-on technical support to customers troubleshooting and repairing Apple /Mac products with courtesy, speed and skill. Use your problem-solving skills Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.