On driver concerns/mentions for the Twin Turbo 128 - According to
http://oldcomputer.info/apple/Power9600/index.htm the upgrades section mentions that Mac OS 9.1 has the video driver built-in for the stock card which is the same as the one he has a photo of in the following link:
http://oldcomputer.info/gallery.php?spgmGal=Museum/Apple/Power_Mac_9600_350&spgmPic=15#spgmPicture
What's odd is that he mentions makes mention of a video driver which I installed but when I attempt to open it I get the following message: "A Twin Turbo PCI card can not be found in this Macintosh." Please shutdown check the installation and try again",
http://web.archive.org/web/20060318204335/http://eshop.macsales.com/Tech/index.cfm?load=ixmicro.html - Drivers for IX Micro video board. In fact as the inits display as the machine starts up, this init has an X over it to indicate it is not compatible or irrelevant.
At the time of writing the above I did have the "9600 Graphics Accelerator" version 4.0.6 Apple extension installed and active. This is the native driver that gets installed with the original Power Macintosh 9600 CD. I originally installed 9.1 on this machine using a 9.1 retail disc. I then used OS 9 Helper to bring the machine up to 9.2.2. From what I read the "9600 Graphics Accelerator" is not required in Mac OS 9.1 because it is built in apparently. I wonder if 9.2.2 has it built-in as well?
I disabled the following and restarted to understand if there was any impact one way or another on performance.
- "9600 Graphics Accelerator" Extension
- Twin Turbo Acceleration v 4.0.6 (Extension)
- Twin Turbo Control Panel
- Twin Turbo M8 upgrade (extension)
- Twin Turbo Upgrade (extension)
- Twin Turbo Control Strip
RESULTS: The machine's video performance remains the same.
I am afraid that this card is as fast as it will ever get.
NOTE: This is a caption from the Power Mac Read Me - Part 1 for disc "691-0000-A,Z,Power Macintosh 7300, 8600, and 9600 series. SSW v7.5.5. (CD) {image modified} [English International].toast", available on the internet archive.
"Removing the 9600 Graphics Accelerator.
When you turn on your computer, icons appear along the bottom of the screen to indicate which system software extensions are being loaded during startup. On Power Macintosh 7300, 7600, and 8600 models, this extension may appear with a red “X” through it. This “9600 Graphics Accelerator” extension file is only required for use on Power Macintosh 9600 models that contain the optional video card. If you are using a Power Macintosh other than the 9600 model, you can delete this extension file if you wish. To delete the “9600 Graphics Accelerator” extension (located in the Extensions folder inside your System Folder), drag its icon to the Trash."
Some other things I've done:
Trashed the /SystemFolder/Preferences/Display Preferences
I apologize for the long reply, hopefully all the info, though sporadic, might help someone in the future.
TO DO: Find documentation that provides evidence, one way or another, if installing the video card on a specific PCI slot yields higher performance.
Thanks for your patience.
Alex