Documentation/admin-guide/svga.rst

7 :Copyright: |copy| 1995--1999 Martin Mares, <mj@ucw.cz>
22    remember its mode ID (the four-digit hexadecimal number) and then
31    NORMAL_VGA - Standard 80x25 mode available on all display adapters.
33    EXTENDED_VGA	- Standard 8-pixel font mode: 80x43 on EGA, 80x50 on VGA.
35    ASK_VGA - Display a video mode menu upon startup (see below).
37    0..35 - Menu item number (when you have used the menu to view the list of
41       modes are listed in a "first detected -- first displayed" manner. It's
44    0x.... - Hexadecimal video mode ID (also displayed on the menu, see below
46       hexadecimal numbers -- you have to convert it to decimal manually.
52 bootup. It displays a "Press <RETURN> to see video modes available, <SPACE>
54 menu, if you press <SPACE> or wait 30 seconds, the kernel will boot up in
59 	Video adapter: <name-of-detected-video-adapter>
66 	Enter mode number or ``scan``: <flashing-cursor-here>
68 <name-of-detected-video-adapter> tells what video adapter did Linux detect
69 -- it's either a generic adapter name (MDA, CGA, HGC, EGA, VGA, VESA VGA [a VGA
70 with VESA-compliant BIOS]) or a chipset name (e.g., Trident). Direct detection
78 <flashing-cursor-here> encourages you to enter the item number or mode ID
84 case your chipset has been detected, some chipset-specific modes are shown as
92 finally SVGA modes for the auto-detected adapter.
103 After scanning, the mode ordering is a bit different: the auto-detected SVGA
111 used here are also a bit complex. A video mode ID is a 16-bit number usually
117    0x0000 to 0x00ff - menu item references. 0x0000 is the first item. Don't use
121    0x0100 to 0x017f - standard BIOS modes. The ID is a BIOS video mode number
124    0x0200 to 0x08ff - VESA BIOS modes. The ID is a VESA mode ID increased by
127    0x0900 to 0x09ff - Video7 special modes. Set by calling INT 0x10, AX=0x6f05.
131    0x0f00 to 0x0fff - special modes (they are set by various tricks -- usually
134 	0x0f01	standard with 8-point font: 80x43 on EGA, 80x50 on VGA
135 	0x0f02	VGA 80x43 (VGA switched to 350 scanlines with a 8-point font)
136 	0x0f03	VGA 80x28 (standard VGA scans, but 14-point font)
138 	0x0f05	VGA 80x30 (480 scans, 16-point font)
139 	0x0f06	VGA 80x34 (480 scans, 14-point font)
140 	0x0f07	VGA 80x60 (480 scans, 8-point font)
143    0x1000 to 0x7fff - modes specified by resolution. The code has a "0xRRCC"
146 	This is the only fully portable way to refer to a non-standard mode,
150    0xff00 to 0xffff - aliases for backward compatibility:
157 cards with S3 chipsets and old Cirrus Logic BIOSes) -- mainly extra lines at the
166 VIDEO_GFX_HACK - includes special hack for setting of graphics modes
184 If you start Linux from M$-DOS, you might also use some DOS tools for
186 current settings") to Linux, because if you don't and you use any non-standard
190 bottom of the display containing already scrolled-out text, your VGA BIOS
193 this must be done manually -- no autodetection mechanisms are available.
199 1.0 (??-Nov-95)	First version supporting all adapters supported by the old
202 2.0 (28-Jan-96)	Rewritten from scratch. Cirrus Logic 64XX support added, almost
204 		stable, explicit mode numbering allowed, "scan" implemented etc.
205 2.1 (30-Jan-96) VESA modes moved to 0x200-0x3ff. Mode selection by resolution
211 2.2 (01-Feb-96)	EGA 80x43 fixed. VESA extended to 0x200-0x4ff (non-standard 02XX
216 2.3 (15-Mar-96)	Changed to work with 1.3.74 kernel.
217 2.4 (18-Mar-96)	Added patches by Hans Lermen fixing a memory overwrite problem
222 2.5 (19-Mar-96)	Fixed a VESA mode scanning bug introduced in 2.4.
223 2.6 (25-Mar-96)	Some VESA BIOS errors not reported -- it fixes error reports on
225 2.7 (09-Apr-96)	- Accepted all VESA modes in range 0x100 to 0x7ff, because some
227 		- Added Realtek VGA modes (thanks to Gonzalo Tornaria).
228 		- Hardware testing order slightly changed, tests based on ROM
230 		- Added support for special Video7 mode switching functions
232 		- Added 480-scanline modes (especially useful for notebooks,
235 		- Screen store/restore fixed.
236 2.8 (14-Apr-96) - Previous release was not compilable without CONFIG_VIDEO_SVGA.
237 		- Better recognition of text modes during mode scan.
238 2.9 (12-May-96)	- Ignored VESA modes 0x80 - 0xff (more VESA BIOS bugs!)
239 2.10(11-Nov-96) - The whole thing made optional.
240 		- Added the CONFIG_VIDEO_400_HACK switch.
241 		- Added the CONFIG_VIDEO_GFX_HACK switch.
242 		- Code cleanup.
243 2.11(03-May-97) - Yet another cleanup, now including also the documentation.
244 		- Direct testing of SVGA adapters turned off by default, ``scan``
246 		- Removed the doc section describing adding of new probing
248 2.12(25-May-98) Added support for VESA frame buffer graphics.
249 2.13(14-May-99) Minor documentation fixes.