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READWHIP.TXT
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1995-06-23
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====================================================================
README.TXT -- AutoCAD Release 13c3
AutoCAD WHIP Display Driver
====================================================================
CONTENTS
========
- AutoCAD WHIP Display Driver Installation
- WinG Installation
- Interactive Pan & Zoom Features
- Driver Specific Problems
--------------------------------------------------------------------
After installing/configuring the AutoCAD WHIP display list
driver, refer to the Online Help file accessed from the driver
configuration dialog for additional details concerning the
functionality of the driver.
The WHIP driver is designed to work with the c2 and c3 versions
of AutoCAD Release 13 for Windows and Windows NT. In addition,
this driver should also work with the c0 and c1 releases, however
it has not been tested. Release 13 for DOS, UNIX and Alpha NT or
AutoCAD Release 12 is not supported by this driver. The WHIP driver
has been optimized for performance with 256 color display devices.
While performance should still be quite good with 16 or greater
than 256 color devices, it is recommended that a 256 color
configuration be used with the WHIP driver.
------------------------------------------------------------------------
The WHIP driver's performance improvements are partly
the result of an off-screen bitmap. This bitmap requires
approximately 1 megabyte of additional RAM. Therefore, it is
recommended that you increase system memory in order to
accommodate drawings that exceed 1 megabyte.
Because of the off-screen buffer used by the WHIP driver to
improve performance, AutoCAD applications which write directly
to the frame buffer may produce unexpected results when used with
the WHIP driver. Similarly, applications that send ADI packets
directly to the driver may encounter problems. Softdesk's CAD
Overlay is one product that is known to be incompatible with the
WHIP driver.
If you have an application that does not appear to be working
correctly with the WHIP driver, it is recommended that you
reconfigure AutoCAD to use the Accelerated Display Driver
configuration option (Rasterex driver), or use an independently
developed accelerated driver.
-------------------------------------------------------------------------
AutoCAD WHIP Display List Driver Installation
------------------------------------------------------------------
If you received a c3 or later release of AutoCAD, the WHIP driver
is included with the AutoCAD installation. Therefore, you can
proceed to the "WinG Installation" section of this readme.
If you received the WHIP driver separately from AutoCAD (e.g.
on a floppy or through an online service), use the following
procedure to install and configure the driver.
To install the WHIP display driver:
1. Add the driver files to your AutoCAD root directory.
2. Copy the driver files from the floppy disk into the AutoCAD
directory. If your AutoCAD path is c:\r13\win use
the following example to copy the files.
cd c:\r13\win
copy a:*.*
3. If you do not have Microsoft WinG installed, use the procedure
in the following "WinG Installation" readme section to install
it before running the WHIP driver.
4. Reconfigure AutoCAD to use the new driver. Use the following
procedure to reconfigure the new driver.
- Start AutoCAD
- From the Configuration menu, choose option 3,
Configure Video Display
- Follow the prompts to configure the AutoCAD
WHIP Driver
NOTE: For optimum performance of the WHIP driver, your
video display should be configured for 256 color mode.
------------------------------------------------------------------------------
Microsoft WinG Installation
---------------------------
To use the WHIP display list driver with Microsoft Windows or Microsoft
Windows for Workgroups, you must first install WinG. WinG version 1.0,
included with the WHIP driver, is a performance enhancement from
Microsoft that provides faster display access in a Microsoft Windows
or Windows for Workgroups environment.
The AutoCAD WHIP driver does not require WinG if you are using
Microsoft Windows NT 3.5. Installation of WinG under NT is allowed,
but is not used by the WHIP driver.
To install WinG:
1. Insert the WHIP driver diskette, the AutoCAD c3 CD or the
diskette labeled Microsoft WinG into the appropriate drive.
2. From the Windows Program Manager, choose the File menu.
3. Choose Run, and enter the following (specifying the
appropriate drive letter):
a: \wing\setup.exe
4. Follow the prompts to complete the installation.
NOTE: The first time you install/configure a new video display
driver, WinG runs a performance test to determine the fastest way
to transfer a Bitmap to the display. This test takes
a few minutes, and only happens once (unless you change your
video mode).
Interactive Pan & Zoom
----------------------
The c3 patch to AutoCAD R13 provides two commands, RTPAN and RTZOOM,
to perform interactive panning and zooming. These pan and zoom
features are only intended for use with the c3 version of Release 13,
and the WHIP display driver or a high performance independently
developed display driver. A slow display driver will impact the
performance of these features.
When the RTPAN and RTZOOM commands are active, no other AutoCAD
commands can be executed.
NOTE: RTPAN and RTZOOM are provided specifically for Release c3.
These commands do not exist in the c2 or earlier versions of
AutoCAD Release 13. Future compatibility with these commands is not
guaranteed. For example in AutoCAD Release 14, this functionality may
be merged into improved versions of previously existing commands.
MENU CONFIGURATION
To interact with RTPAN and RTZOOM, you must load the .mnu file
rtpanzm.mnu to add these features to the toolbar. Use the following
procedure to add the RTPAN/RTZOOM toolbar menu.
1. From the Tools menu, choose Customize Menus.
2. From the Menu Customization dialog box, enter rtpanzm.mnu
in the File Name edit box.
3. Choose LOAD.
4. Choose CLOSE.
You can also enter MENULOAD from the command line to access
the Menu Customization dialog box.
The following sections describe the functionality of interactive
panning and zooming.
PANNING
To pan, enter RTPAN or select the hand icon from the RTPAN/RTZOOM
toolbar. The cursor changes to a hand cursor. By holding the pick
button down, the cursor is locked to its current location relative
to the drawing viewport display coordinate system. Graphics within
the window are moved in the same direction along with the cursor.
When you have reached a logical extent (edge of the drawing space),
a bar appears on the cursor indicating the side where the extent has
been reached. Depending upon whether the logical extent reached is at
the top, bottom, or side of the drawing, the bar that appears is
either horizontal (top or bottom), or vertical (left or right side).
When you release the pick button, panning is discontinued. You
can release the pick button, move the cursor to another location
in the drawing, then press the pick button again and continue to
pan the display from that location.
To exit panning at the new position, press RETURN or ESC.
ZOOMING
To zoom, enter RTZOOM or select the magnifying glass icon from the
RTPAN/RTZOOM toolbar. The cursor changes to a magnifying glass
with a + and - symbol.
The current drawing window is used to determine the zooming factor.
The RTZOOM command uses half of the window height to move to a zoom
factor of 100%. Holding the pick button down at the mid-point of
the window and moving vertically to the top of the window, zooms
in to 100%. Conversely, holding the pick button down at the mid-point
of the window and moving vertically to the bottom of the window,
zooms out by 100%.
NOTE: If the cursor is placed at the bottom of the window, and the
pick button is pressed down and moved vertically to the top of
the window, the zoom in factor would be 200%.
When you have reached the zoom in limit, the cursor changes to a
- symbol, indicating that you can no longer zoom in. When you have
reached the zoom out limit, the cursor changes to a + symbol,
indicating that you no longer zoom out.
When you release the pick button, zooming is discontinued. You can
release the pick button, move the cursor to another location in
the drawing, then press the pick button again and continue to
zoom the display from that location.
To exit zooming at the new position, press RETURN or ESC.
------------------------------------------------------------------------------
WinG/WHIP Driver-Specific Problems
----------------------------------
WinG depends on Windows display drivers written by independent hardware
manufacturers for much of its speed. Bugs or performance problems in
independently developed display drivers may cause problems with WinG.
In many cases, the video card manufacturer has already fixed the bug,
and upgrading your display driver will often clear away problems.
The following is a list of known bugs related to specific display drivers
by manufacturer. This list is not intended to slight the manufacturer
or any particular card or driver. A list of stress-tested configurations
is available on the CompuServe WINMM forum and also on ftp.microsoft.com.
- Early drivers for Diamond Viper cards included a "Power-Palette"
option that is no longer supported by Diamond. Diamond recommends
that you upgrade your drivers if you have this option. WinG may be
slower when the power palette is enabled.
- IBM no longer supports the IBM ThinkPad 720c. There are some
problems using WinG with the ThinkPad 720c display drivers.
- Cirrus drivers prior to version 1.43 have many known bugs that have
been fixed in more recent drivers. Be sure to upgrade your drivers
to at least version 1.43 or later.
- Some ATI drivers offer a "Crystal Fonts" option. Turning Crystal
Fonts on in an 8-bit mode sets up a non-palettized driver that can
significantly slow the performance of WinG.
- The ATI Mach 8 Radical drivers cause a number of problems in both
WinG and in Windows when used with some versions of the ATI chipset.
- The ATI VGA Wonder drivers (W31-*.drv) will crash during a call to
StretchDIBits in the profiler. Users can run the SVGA256.DRV
driver that shipped with Windows. Many micro Crystal drivers have
problems with StretchDIBits, and may crash during profiling.
- Early ATI Mach 32 PCI cards have a hardware timing problem and
will hang while blting. ATI will replace these cards at no cost.
- WinG is incompatible with the #9GXE "TurboCopy" mode. Use the #9
control panel to disable TurboCopy. This mode is off by default.
- WinG uses a GetPixel to synchronize with display hardware when
writing directly to the screen. The ATI Mach 32 driver's GetPixel
does not work properly, so it is possible to use GDI to draw to
the screen. Then use WinG to blt to the screen and have them
overwrite each other. Be careful mixing GDI drawing commands
and WinG blts to the display.
- The Orchid mmtllo.drv driver for the Prodesigner IIs has duplicate
system colors which prevents applications from getting an identity
palette, and greatly reduces the WinG blt speed. A workaround is
to set SYSPAL_NOSTATIC mode or use the standard Tseng ET4000
drivers instead of the mmtllo drivers.
- When Windows is configured for greater than 256 colors, you may
encounter anomalies using the WHIP driver in conjunction with
AutoCAD Render. It is recommended that you configure your
Windows video display driver for 256 colors if you should
encounter any odd behavior.