Apple PowerBook File Assistant Manual de usuario descargar pdf (Pagina 2)

Extensions

http://www.AmbrosiaSW.com/DEF/PP/ext.html Friday, September 5, 1997

accelerator chip. Thus, not having this extension installed could slow down certain graphics functions. Power Computing's PowerCenter

and PowerTower computers use the 7200's chip set, so they also benefit from having this extension installed. According to MacWEEK, this

file can boost display speed by up to 20% on computers with the 7200 chip set. The benefits from this extension are much more noticeable if

you add an extra MB of VRAM to your 7200. With the stock 1MB of VRAM, the video bus is only 32 bits wide. However, after adding the

extra 1MB (so that you now have 2MB), the video data path is 64 bits. This increases the graphics speed of the 7200, even without this

extension installed. However, it seems that the 7200 Graphics Acceleration extension really takes advantage of this wider bus, and the

difference when it is installed is very noticeable. There are two web sites that I have found which give further information on this extension:

here and here.

7200 Graphics Driver: I have never seen this extension myself, but have been told that it does indeed exist. The 7200 Graphics Driver does

NOT replace the 7200 Graphics Acceleration extension (above). The two pieces of software are independent of each other, and you should

always keep the 7200 Graphics Acceleration extension installed. The 7200 Graphics Driver fixes a problem with random pixels appearing on

the display when the Color Look-Up Table changes and/or an application uses certain custom cursors. These problems tend to happen

during the startup routine of certain games which fade in and/or out; they also happen in applications such as Fetch.

7500/8500 Graphics Driver (v1.3.f0): an obscure Apple "unsupported" video driver. From the "ReadMe" file: "used for the motherboard

video on PowerMac 7500/8500 based systems... On average, the standard driver would spend 7 ms inside a spin loop each time the color

palette was changed. The new driver saves the changes to a global variable and updates the hardware to avoid this delay... Furthermore,

7500/8500 based machines would clear one interrupt too many when updating the CLUT... Hence the mouse would be jerky. Marathon

players who use the mouse will notice a dramatic improvement when items are picked up or opponents destroyed (Marathon calls

SetEntries/DirectSetEntries to make the screen flash). Side Effect: Apps that fade the screen to black may now jump to black immediately."

Supposedly the 7500/8500 Graphics Driver will be included in the next System Update AFTER 7.5.5. If you problems with this driver,

reboot and hold down "command shift N D" until the progress bar is about 1/2 done. Then remove the driver and reboot. You cannot use

this version of the driver if you use MacsBug.

950 Color Addition: addresses an obscure video bug in the Quadra 950 on pre-7.1 systems. The fix was incorporated into System 7.1.

A/ROSE: "Apple Real-Time Operating System Environment" -- only necessary for certain older Nubus cards which use the MCP

(Macintosh Coprocessor Platform) platform and run the Apple Real-Time Operating System (i.e. Apple's short Ethernet card, Token Ring

4.16 NB card, Serial NB card, and Coax/TwinAx NB card).

ADBReInit (v1.0): an Apple "unsupported" extension. From the Apple Technote: "The ADBReInit extension prevents memory from being

moved at interrupt time, which could cause the PowerBook 140 and 170 models, as well as the Macintosh Quadra 700, 900, 950 models, to

hang or crash if "ADBReInit" is called. Informal testing indicates that this is more likely to happen while AppleShare is active (file sharing is

turned on). ADBReInit normally is never called on a Macintosh Quadra because connecting ADB devices while the CPU power is on is

discouraged. There is a specific instant that the PowerBook uses the call: When coming out of Sleep mode, ADBReInit is called to determine

whether or not external ADB devices are attached." This extension is provided by Kensington with their TurboMouse and Thinking Mouse

for backwards compatibility. Supposedly, this extension has been included in the System itself since System 7.1.

ADSP: AppleTalk Data Stream Protocol. Provided networking protocol under pre-7.0 systems. More specifically, it provided data flow and

full duplex data delivery over a network. However, in order for the benefits to be realized, both Macs had to be running this extension.

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Apple PowerBook File Assistant Manual de usuario Pagina 2