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1993-07-21
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157 lines
VESA SVGA BIOS Extension TSR for the IBM XGA/A and XGA-2 Adapter
Version: 1.00 Release 05 12-16-92
HOW TO INSTALL?
---------------
Just type the name of the TSR at the DOS prompt -- SVGAVESA.
HOW TO GET HELP?
----------------
Typing SVGAVESA /h or SVGAVESA -h at the DOS prompt brings up the on-line help.
HOW TO UNINSTALL?
-----------------
Typing SVGAVESA /u or SVGAVESA -u at the DOS prompt unistalls the TSR.
WHAT DOES THIS PROGRAM DO?
--------------------------
SVGAVESA is a TSR that makes your XGA/A or XGA-2 Adapter VESA-compliant
for SVGA.
WHAT ARE THE SUPPORTED CONFIGURATIONS?
--------------------------------------
The SVGAVESA TSR will only work if there is an XGA device (adapter or chip)
in the system that is currently running in VGA mode. This means that if your
system has a VGA on the planar or adapter, it CANNOT have a monitor attached
to it.
WHAT VIDEO MODES AND VESA CALLS DOES THIS PROGRAM SUPPORT?
----------------------------------------------------------
This TSR supports the following standard SVGA VESA modes for the XGA/A adapter:
VESA mode Description
100h 640x400x256 color packed pixel mode
101h 640x480x256 color packed pixel mode
105h * 1024x768x256 color packed pixel mode (requires 1 Meg VRAM)
10Eh 320x200x64K color packed pixel mode
111h 640x480x64K color packed pixel mode (requires 1 Meg VRAM)
108h ** 80 column 60 line text mode
109h ** 132 column 25 line text mode
10Ah ** 132 column 43 line text mode
10Bh ** 132 column 50 line text mode
10Ch ** 132 column 60 line text mode
* This mode is only supported on the XGA/A adapter if an 8514, 8515, 8516,
or 8517 monitor is connected.
** These modes are only supported if an XGA in the system is initially
brought up in VGA mode. Therefore, systems that have a VGA on the
planar must not have a monitor connected in order for the TSR to
provide support for these modes.
This TSR supports the following standard VESA modes for the XGA-2 adapter
(in addition to the modes supported for the XGA/A product), provided the
appropriate DMQS Display Information file indicates that the mode is
available on the installed system:
VESA mode Description
102h 800x600x16 color planar mode
103h 800x600x256 color packed pixel mode
114h 800x600x64K color packed pixel mode (60Hz Vertical Refresh)
SVGAVESA supports all of the VESA calls defined in the VESA SuperVGA
standard VS911022-2 (dated 20/Oct/91) on XGA/A and XGA-NI adapters
except:
Function 01h - Return Super VGA mode information
D2 - Output functions supported in BIOS.
Output functions will not be supported
This does not mean that Function 01h is not supported, but only that the BIOS
does not support output functions like TTY output, scroll, pixel output, etc..
RESTRICTIONS.
-------------
1) The TSR will not work in a DOS Session under Windows 3.x.
KNOWN VESA SVGA APPLICATIONS THAT WILL NOT WORK WITH THIS TSR.
--------------------------------------------------------------
Any VESA SVGA application that accesses the hardware directly, instead of
using BIOS, will not work because the SVGAVESA TSR is implementing the SVGA
modes with the XGA adapter in XGA mode. When the adapter is in XGA mode,
the VGA registers are not available. Therefore, applications that try to
update the VGA's Video DAC via direct hardware writes instead of using BIOS
INT10 calls will fail. Also, applications that attempt to wait for a
VGA-style vertical retrace signal will lock up the system.
==============================================================================
VESA XGA BIOS Extension TSR for the IBM XGA/A and XGA-2 Adapter
Version: 1.00 Release 05 12-16-92
HOW TO INSTALL?
---------------
Just type the name of the TSR at the DOS prompt -- XGAVESA.
HOW TO GET HELP?
----------------
Typing XGAVESA /h or XGAVESA -h at the DOS prompt brings up the online help.
HOW TO UNINSTALL?
-----------------
Typing XGAVESA /u or XGAVESA -u at the DOS prompt uninstalls the TSR.
WHAT DOES THIS PROGRAM DO?
--------------------------
XGAVESA is a TSR that makes your XGA/A or XGA-2 Adapter VESA-compliant
for XGA.
WHAT VIDEO MODES AND VESA CALLS DOES THIS PROGRAM SUPPORT?
----------------------------------------------------------
This TSR supports the following standard XGA VESA modes for the XGA/A adapter:
VESA XGA Description
OEM Mode Tag
208h 640x480x256 color mode
228h 640x400x256 color mode
284h * 1024x768x16 color mode
288h * 1024x768x256 color mode (requires 1 Meg VRAM)
* This mode is only supported on the XGA/A adapter if an 8514, 8515, 8516,
or 8517 monitor is connected.
This TSR supports the following for the XGA-2 adapter (in addition to the
modes supported for the XGA/A product), provided the appropriate DMQS Display
Information file indicates that the mode is available on the installed system:
VESA XGA Description
OEM Mode Tag
210h 640x480x64K direct color mode
230h 640x400x64K direct color mode
244h 800x600x16 color mode
248h 800x600x256 color mode
250h 800x600x64K direct color mode (60Hz Vertical Refresh)
288h 1024x768x256 color mode
2C4h 1040x768x16 color mode
2C8h 1040x768x256 color mode