^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) .. include:: <isonum.txt>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) =================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) Video Mode Selection Support 2.13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) =================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) :Copyright: |copy| 1995--1999 Martin Mares, <mj@ucw.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) Intro
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) ~~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) This small document describes the "Video Mode Selection" feature which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) allows the use of various special video modes supported by the video BIOS. Due
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) to usage of the BIOS, the selection is limited to boot time (before the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) kernel decompression starts) and works only on 80X86 machines that are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) booted through BIOS firmware (as opposed to through UEFI, kexec, etc.).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) .. note::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) Short intro for the impatient: Just use vga=ask for the first time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) enter ``scan`` on the video mode prompt, pick the mode you want to use,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) remember its mode ID (the four-digit hexadecimal number) and then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) set the vga parameter to this number (converted to decimal first).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) The video mode to be used is selected by a kernel parameter which can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) specified in the kernel Makefile (the SVGA_MODE=... line) or by the "vga=..."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) option of LILO (or some other boot loader you use) or by the "xrandr" utility
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) (present in standard Linux utility packages). You can use the following values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) of this parameter::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) NORMAL_VGA - Standard 80x25 mode available on all display adapters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) EXTENDED_VGA - Standard 8-pixel font mode: 80x43 on EGA, 80x50 on VGA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) ASK_VGA - Display a video mode menu upon startup (see below).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 0..35 - Menu item number (when you have used the menu to view the list of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) modes available on your adapter, you can specify the menu item you want
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) to use). 0..9 correspond to "0".."9", 10..35 to "a".."z". Warning: the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) mode list displayed may vary as the kernel version changes, because the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) modes are listed in a "first detected -- first displayed" manner. It's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) better to use absolute mode numbers instead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 0x.... - Hexadecimal video mode ID (also displayed on the menu, see below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) for exact meaning of the ID). Warning: LILO doesn't support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) hexadecimal numbers -- you have to convert it to decimal manually.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) Menu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) The ASK_VGA mode causes the kernel to offer a video mode menu upon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) bootup. It displays a "Press <RETURN> to see video modes available, <SPACE>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) to continue or wait 30 secs" message. If you press <RETURN>, you enter the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) menu, if you press <SPACE> or wait 30 seconds, the kernel will boot up in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) the standard 80x25 mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) The menu looks like::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) Video adapter: <name-of-detected-video-adapter>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) Mode: COLSxROWS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 0 0F00 80x25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 1 0F01 80x50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 2 0F02 80x43
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 3 0F03 80x26
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) Enter mode number or ``scan``: <flashing-cursor-here>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) <name-of-detected-video-adapter> tells what video adapter did Linux detect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) -- it's either a generic adapter name (MDA, CGA, HGC, EGA, VGA, VESA VGA [a VGA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) with VESA-compliant BIOS]) or a chipset name (e.g., Trident). Direct detection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) of chipsets is turned off by default as it's inherently unreliable due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) absolutely insane PC design.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) "0 0F00 80x25" means that the first menu item (the menu items are numbered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) from "0" to "9" and from "a" to "z") is a 80x25 mode with ID=0x0f00 (see the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) next section for a description of mode IDs).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) <flashing-cursor-here> encourages you to enter the item number or mode ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) you wish to set and press <RETURN>. If the computer complains something about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) "Unknown mode ID", it is trying to tell you that it isn't possible to set such
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) a mode. It's also possible to press only <RETURN> which leaves the current mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) The mode list usually contains a few basic modes and some VESA modes. In
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case your chipset has been detected, some chipset-specific modes are shown as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) well (some of these might be missing or unusable on your machine as different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) BIOSes are often shipped with the same card and the mode numbers depend purely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) on the VGA BIOS).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) The modes displayed on the menu are partially sorted: The list starts with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) the standard modes (80x25 and 80x50) followed by "special" modes (80x28 and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 80x43), local modes (if the local modes feature is enabled), VESA modes and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) finally SVGA modes for the auto-detected adapter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) If you are not happy with the mode list offered (e.g., if you think your card
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) is able to do more), you can enter "scan" instead of item number / mode ID. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) program will try to ask the BIOS for all possible video mode numbers and test
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) what happens then. The screen will be probably flashing wildly for some time and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) strange noises will be heard from inside the monitor and so on and then, really
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) all consistent video modes supported by your BIOS will appear (plus maybe some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) ``ghost modes``). If you are afraid this could damage your monitor, don't use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) this function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) After scanning, the mode ordering is a bit different: the auto-detected SVGA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) modes are not listed at all and the modes revealed by ``scan`` are shown before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) all VESA modes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) Mode IDs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ~~~~~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) Because of the complexity of all the video stuff, the video mode IDs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) used here are also a bit complex. A video mode ID is a 16-bit number usually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) expressed in a hexadecimal notation (starting with "0x"). You can set a mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) by entering its mode directly if you know it even if it isn't shown on the menu.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) The ID numbers can be divided to those regions::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 0x0000 to 0x00ff - menu item references. 0x0000 is the first item. Don't use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) outside the menu as this can change from boot to boot (especially if you
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) have used the ``scan`` feature).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 0x0100 to 0x017f - standard BIOS modes. The ID is a BIOS video mode number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) (as presented to INT 10, function 00) increased by 0x0100.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 0x0200 to 0x08ff - VESA BIOS modes. The ID is a VESA mode ID increased by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 0x0100. All VESA modes should be autodetected and shown on the menu.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 0x0900 to 0x09ff - Video7 special modes. Set by calling INT 0x10, AX=0x6f05.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) (Usually 940=80x43, 941=132x25, 942=132x44, 943=80x60, 944=100x60,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 945=132x28 for the standard Video7 BIOS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 0x0f00 to 0x0fff - special modes (they are set by various tricks -- usually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) by modifying one of the standard modes). Currently available:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 0x0f00 standard 80x25, don't reset mode if already set (=FFFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 0x0f01 standard with 8-point font: 80x43 on EGA, 80x50 on VGA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 0x0f02 VGA 80x43 (VGA switched to 350 scanlines with a 8-point font)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 0x0f03 VGA 80x28 (standard VGA scans, but 14-point font)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 0x0f04 leave current video mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 0x0f05 VGA 80x30 (480 scans, 16-point font)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 0x0f06 VGA 80x34 (480 scans, 14-point font)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 0x0f07 VGA 80x60 (480 scans, 8-point font)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 0x0f08 Graphics hack (see the VIDEO_GFX_HACK paragraph below)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 0x1000 to 0x7fff - modes specified by resolution. The code has a "0xRRCC"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) form where RR is a number of rows and CC is a number of columns.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) E.g., 0x1950 corresponds to a 80x25 mode, 0x2b84 to 132x43 etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) This is the only fully portable way to refer to a non-standard mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) but it relies on the mode being found and displayed on the menu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) (remember that mode scanning is not done automatically).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 0xff00 to 0xffff - aliases for backward compatibility:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 0xffff equivalent to 0x0f00 (standard 80x25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 0xfffe equivalent to 0x0f01 (EGA 80x43 or VGA 80x50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) If you add 0x8000 to the mode ID, the program will try to recalculate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) vertical display timing according to mode parameters, which can be used to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) eliminate some annoying bugs of certain VGA BIOSes (usually those used for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) cards with S3 chipsets and old Cirrus Logic BIOSes) -- mainly extra lines at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) end of the display.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) Options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ~~~~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) Build options for arch/x86/boot/* are selected by the kernel kconfig
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) utility and the kernel .config file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) VIDEO_GFX_HACK - includes special hack for setting of graphics modes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) to be used later by special drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) Allows to set _any_ BIOS mode including graphic ones and forcing specific
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) text screen resolution instead of peeking it from BIOS variables. Don't use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) unless you think you know what you're doing. To activate this setup, use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) mode number 0x0f08 (see the Mode IDs section above).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) Still doesn't work?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) ~~~~~~~~~~~~~~~~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) When the mode detection doesn't work (e.g., the mode list is incorrect or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) the machine hangs instead of displaying the menu), try to switch off some of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) the configuration options listed under "Options". If it fails, you can still use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) your kernel with the video mode set directly via the kernel parameter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) In either case, please send me a bug report containing what _exactly_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) happens and how do the configuration switches affect the behaviour of the bug.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) If you start Linux from M$-DOS, you might also use some DOS tools for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) video mode setting. In this case, you must specify the 0x0f04 mode ("leave
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) current settings") to Linux, because if you don't and you use any non-standard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) mode, Linux will switch to 80x25 automatically.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) If you set some extended mode and there's one or more extra lines on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) bottom of the display containing already scrolled-out text, your VGA BIOS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) contains the most common video BIOS bug called "incorrect vertical display
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) end setting". Adding 0x8000 to the mode ID might fix the problem. Unfortunately,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) this must be done manually -- no autodetection mechanisms are available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) History
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) ~~~~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) =============== ================================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 1.0 (??-Nov-95) First version supporting all adapters supported by the old
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) setup.S + Cirrus Logic 54XX. Present in some 1.3.4? kernels
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) and then removed due to instability on some machines.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 2.0 (28-Jan-96) Rewritten from scratch. Cirrus Logic 64XX support added, almost
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) everything is configurable, the VESA support should be much more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) stable, explicit mode numbering allowed, "scan" implemented etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 2.1 (30-Jan-96) VESA modes moved to 0x200-0x3ff. Mode selection by resolution
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) supported. Few bugs fixed. VESA modes are listed prior to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) modes supplied by SVGA autodetection as they are more reliable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) CLGD autodetect works better. Doesn't depend on 80x25 being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) active when started. Scanning fixed. 80x43 (any VGA) added.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) Code cleaned up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 2.2 (01-Feb-96) EGA 80x43 fixed. VESA extended to 0x200-0x4ff (non-standard 02XX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) VESA modes work now). Display end bug workaround supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) Special modes renumbered to allow adding of the "recalculate"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) flag, 0xffff and 0xfffe became aliases instead of real IDs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) Screen contents retained during mode changes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 2.3 (15-Mar-96) Changed to work with 1.3.74 kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 2.4 (18-Mar-96) Added patches by Hans Lermen fixing a memory overwrite problem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) with some boot loaders. Memory management rewritten to reflect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) these changes. Unfortunately, screen contents retaining works
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) only with some loaders now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) Added a Tseng 132x60 mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 2.5 (19-Mar-96) Fixed a VESA mode scanning bug introduced in 2.4.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 2.6 (25-Mar-96) Some VESA BIOS errors not reported -- it fixes error reports on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) several cards with broken VESA code (e.g., ATI VGA).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 2.7 (09-Apr-96) - Accepted all VESA modes in range 0x100 to 0x7ff, because some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) cards use very strange mode numbers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) - Added Realtek VGA modes (thanks to Gonzalo Tornaria).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) - Hardware testing order slightly changed, tests based on ROM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) contents done as first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) - Added support for special Video7 mode switching functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) (thanks to Tom Vander Aa).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) - Added 480-scanline modes (especially useful for notebooks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) original version written by hhanemaa@cs.ruu.nl, patched by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) Jeff Chua, rewritten by me).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) - Screen store/restore fixed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 2.8 (14-Apr-96) - Previous release was not compilable without CONFIG_VIDEO_SVGA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) - Better recognition of text modes during mode scan.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 2.9 (12-May-96) - Ignored VESA modes 0x80 - 0xff (more VESA BIOS bugs!)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 2.10(11-Nov-96) - The whole thing made optional.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) - Added the CONFIG_VIDEO_400_HACK switch.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) - Added the CONFIG_VIDEO_GFX_HACK switch.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) - Code cleanup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 2.11(03-May-97) - Yet another cleanup, now including also the documentation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) - Direct testing of SVGA adapters turned off by default, ``scan``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) offered explicitly on the prompt line.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) - Removed the doc section describing adding of new probing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) functions as I try to get rid of _all_ hardware probing here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 2.12(25-May-98) Added support for VESA frame buffer graphics.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 2.13(14-May-99) Minor documentation fixes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) =============== ================================================================
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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