README.MiNT
author Ryan C. Gordon <icculus@icculus.org>
Mon, 12 Dec 2005 09:13:12 +0000
changeset 1199 2d6dc7de1145
parent 1112 6ded3dd929f5
child 1237 a8068adf156b
permissions -rw-r--r--
From: Mike Frysinger <vapier@gentoo.org>
To: sdl@libsdl.org
Date: Sun, 11 Dec 2005 22:57:37 -0500
Subject: [SDL] exec stack in libsdl update

i posted back in September a patch to remove executable stacks:
http://www.devolution.com/pipermail/sdl/2005-September/070626.html

later in November, a similar patch was merged it seems:
http://www.libsdl.org/cgi/cvsweb.cgi/SDL12/src/hermes/mmx_main.asm

however, this lacks the additional output format checks that i posted in my
patch ... this isnt a problem if the hermes asm code is only ever used to
produce ELF objects, but if this is not true, then the additional checks in
my original patch will need to be merged
-mike
     1 ==============================================================================
     2 Using the Simple DirectMedia Layer on Atari
     3 ==============================================================================
     4 
     5 
     6     If you want to build SDL from sources to create SDL programs on Atari:
     7         see sections I - II.
     8 	
     9     If you want to create SDL programs on Atari using SDL binary build,
    10         download it from my web site (URL at end of this file).
    11 
    12     If you want to configure a program using SDL on Atari,
    13 	    see sections IV - VI.
    14 
    15 
    16 ==============================================================================
    17 I.  Building the Simple DirectMedia Layer libraries:
    18     (This step isn't necessary if you have the SDL binary distribution)
    19 
    20   Do the classic configure, with --disable-shared --enable-static and:
    21 
    22     Tos version (should run everywhere):
    23       --disable-threads
    24     Tos does not support threads.
    25 
    26     MiNT version (maybe Magic, only for multitasking OS):
    27       --disable-pthreads --enable-pth
    28     Mint and Magic may supports threads, so audio can be used with current
    29     devices, like Sun audio, or disk-writing support. Like Tos, interrupt
    30     audio without threads is more suited for Atari machines.
    31 
    32   Then you can make ; make install it.
    33 
    34 ==============================================================================
    35 II. Building the Simple DirectMedia Layer test programs:
    36 
    37   Do the classic configure, then make.
    38 
    39   Run them !
    40 
    41 ==============================================================================
    42 III.  Enjoy! :)
    43 
    44   If you have a project you'd like me to know about, or want to ask questions,
    45   go ahead and join the SDL developer's mailing list by sending e-mail to:
    46 
    47 	sdl-request@libsdl.org
    48 
    49   and put "subscribe" into the subject of the message. Or alternatively you
    50   can use the web interface:
    51 
    52 	http://www.libsdl.org/mailman/listinfo/sdl
    53   
    54 ==============================================================================
    55 IV.  What is supported:
    56 
    57 Keyboard (GEMDOS, BIOS, GEM, Ikbd)
    58 Mouse (XBIOS, GEM, Ikbd)
    59 Video (XBIOS (Fullscreen), GEM (Windowed and Fullscreen))
    60 Timer (VBL vector, GNU pth library)
    61 Joysticks and joypads (Ikbd, Hardware)
    62 Audio (Hardware, XBIOS, GSXB, MCSN, STFA, /dev/audio if threads enabled)
    63 Threads (Multitasking OS only via GNU pth library)
    64 Shared object loader (using LDG library from http://ldg.atari.org/)
    65 Audio CD (MetaDOS)
    66 OpenGL (using Mesa offscreen rendering driver)
    67 
    68 - Dependent driver combinations:
    69 Video   Kbd     Mouse   Timer   Joysticks
    70 xbios   ikbd    ikbd    vbl(2)  ikbd
    71 xbios   gemdos  xbios   vbl(2)  xbios
    72 xbios   bios    xbios   vbl(2)  xbios
    73 gem     gem     gem(1)  vbl(2)  xbios
    74 
    75 Audio   O/S     Misc
    76 dma8    All     Uses MFP Timer A interrupt
    77 xbios	TOS     Uses MFP Timer A interrupt
    78 xbios   MiNT    Uses MiNT thread
    79 xbios   Magic   Disabled
    80 stfa    All     Uses MFP interrupt
    81 mcsn	TOS     Uses MFP Timer A interrupt
    82 mcsn    MiNT    Uses MiNT thread
    83 mcsn    Magic   Disabled
    84 gsxb    All     Uses GSXB callback
    85 
    86 Joypad driver always uses hardware access.
    87 OpenGL driver always uses OSMesa.
    88 
    89 (1) GEM does not report relative mouse motion, so xbios mouse driver is used
    90 to report this type event.
    91 
    92 (2) If you build SDL with threads using the GNU pth library, timers are
    93 supported via the pth library.
    94 
    95 ==============================================================================
    96 V.  Environment variables:
    97 
    98 SDL_VIDEODRIVER:
    99 	Set to 'xbios' to force xbios video driver
   100 	Set to 'gem' to force gem video driver
   101 
   102 SDL_VIDEO_GL_DRIVER:
   103 	Set to filename to load as OpenGL library, if you use SDL_GL_LoadLibrary()
   104 
   105 SDL_AUDIODRIVER:
   106 	Set to 'mint_gsxb' to force Atari GSXB audio driver
   107 	Set to 'mint_mcsn' to force Atari MCSN audio driver
   108 	Set to 'mint_stfa' to force Atari STFA audio driver
   109 	Set to 'mint_xbios' to force Atari Xbios audio driver
   110 	Set to 'mint_dma8' to force Atari 8 bits DMA audio driver
   111 	Set to 'audio' to force Sun /dev/audio audio driver
   112 	Set to 'disk' to force disk-writing audio driver
   113 
   114 SDL_ATARI_EVENTSDRIVER
   115 	Set to 'ikbd' to force IKBD 6301 keyboard driver
   116 	Set to 'gemdos' to force gemdos keyboard driver
   117 	Set to 'bios' to force bios keyboard driver
   118 
   119 SDL_JOYSTICK_ATARI:
   120 	Use any of these strings in the environment variable to enable or
   121 	disable a joystick:
   122 
   123 	'ikbd-joy1-[on|off]' for IKBD joystick on port 1 (hardware access)
   124 	'xbios-joy1-[on|off]' for IKBD joystick on port 1 (xbios access)
   125 	'porta-pad-[on|off]' for joypad on port A
   126 	'porta-joy0-[on|off]' for joystick 0 on port A
   127 	'porta-joy1-[on|off]' for joystick 1 on port A
   128 	'porta-lp-[on|off]' for lightpen on port A
   129 	'porta-anpad-[on|off]' for analog paddle on port A
   130 	'portb-pad-[on|off]' for joypad on port B
   131 	'portb-joy0-[on|off]' for joystick 0 on port B
   132 	'portb-joy1-[on|off]' for joystick 1 on port B
   133 	'portb-anpad-[on|off]' for analog paddle on port B
   134 
   135 	Default configuration is:
   136 		'ikbd-joy1-on' (if IKBD events driver enabled)
   137 		'xbios-joy1-on' (if gemdos/bios/gem events driver enabled)
   138 		'porta-pad-on portb-pad-on' (if available on the machine)
   139 
   140 	port[a|b]-[pad|joy?|lp|anpad]-* strings are mutually exclusives.
   141 	On such a port, you can only use a joypad OR 1 or 2 joysticks OR
   142 	a lightpen OR an analog paddle. You must disable joypad before
   143 	setting another controller.
   144 
   145 	The second joystick port on IKBD is used by the mouse, so not usable.
   146 	Another problem with the IKBD: mouse buttons and joystick fire buttons
   147 	are wired together at the hardware level, it means:
   148 		port 0                port 0           port 1
   149 		mouse left button  = joystick fire 0 = joystick fire 1
   150 		mouse right button = joystick fire 1 = joystick fire 0
   151 
   152 	Descriptions of joysticks/joypads:
   153 	- Joypads: 1 hat, 17 buttons (Atari Jaguar console-like).
   154 	- Joysticks: 1 hat, 1 button.
   155 	- Lightpen, analog paddles: 2 axis, 2 buttons. The 2 buttons are those
   156 	  affected to 1 button joysticks on the same port.
   157 
   158 ==============================================================================
   159 VI.  More informations about drivers:
   160 
   161 OpenGL:
   162 	The default is to use the Mesa offscreen driver (osmesa.ldg). If you want
   163 	to use an older OpenGL implementation, like mesa_gl.ldg or tiny_gl.ldg,
   164 	your program must use SDL_GL_LoadLibrary() to do so, and retrieve the
   165 	needed function pointers with SDL_LoadFunction(). In all cases, the OpenGL
   166 	context is taken care of by SDL itself, you just have to use gl* functions.
   167 
   168 	However, there is one OpenGL call that has a different prototype in the old
   169 	implementations: glOrtho(). In the old implementations, it has 6 float as
   170 	parameters, in the standard one, it has 6 double parameters. If you want
   171 	to compile testdyngl, or any other SDL program that loads its OpenGL
   172 	library, you must change the glOrtho() prototype used in this program. In
   173 	osmesa.ldg, you can retrieve a glOrtho() with double parameters, by
   174 	searching for the function "glOrtho6d".
   175 
   176 Xbios video:
   177 	Video chip is detected using the _VDO cookie.
   178 	Screen enhancers are not supported, but could be if you know how to
   179 	use them.
   180 
   181 	ST, STE, Mega ST, Mega STE:
   182 		320x200x4 bits, shades of grey, available only for the purpose
   183 		of testing SDL.
   184 	TT:
   185 		320x480x8 and 320x240x8 (software double-lined mode).
   186 	Falcon:
   187 		All modes supported by the current monitor (RVB or VGA).
   188 		BlowUp and Centscreen extended modes, ScreenBlaster 3 current mode.
   189 	Clones and any machine with monochrome monitor:
   190 		Not supported.
   191 
   192 Gem video:
   193 	Automatically used if xbios not available.
   194 
   195 	All machines:
   196 		Only the current resolution, if 8 bits or higher depth.
   197 
   198 IKBD keyboard, mouse and joystick driver:
   199 	Available if _MCH cookie is ST, Mega ST, STE, Mega STE, TT or Falcon.
   200 
   201 	Hades has an IKBD, but xbios is not available for video, so IKBD
   202 	driver is disabled.
   203 
   204 Gemdos and bios keyboard driver:
   205 	Available on all machines.
   206 
   207 Mouse and joystick xbios driver:
   208 	Available on all machines (I think).
   209 
   210 Joypad driver:
   211 	Available if _MCH cookie is STE or Falcon.
   212 
   213 PTH timer driver:
   214 	Available with multitasking OS.
   215 
   216 VBL timer driver:
   217 	Available on all machines (I think).
   218 
   219 Audio drivers:
   220 	Cookies _SND, MCSN, STFA and GSXB used to detect supported audio
   221 	capabilities.
   222 
   223 	STE, Mega STE, TT:
   224 		8 bits DMA (hardware access)
   225 		STFA, MCSN or GSXB driver if installed
   226 	Falcon:
   227 		8 bits DMA (hardware access)
   228 		Xbios functions
   229 		STFA, MCSN or GSXB driver if installed
   230 	Other machines:
   231 		STFA, MCSN or GSXB driver if installed
   232 
   233 	STFA driver:
   234 		http://removers.free.fr/softs/stfa.html
   235 	GSXB driver:
   236 		http://assemsoft.atari.org/gsxb/
   237 	MacSound driver:
   238 		http://jf.omnis.ch/software/tos/
   239 	MagicSound driver (MCSN,GSXB compatible):
   240 		http://perso.wanadoo.fr/didierm/
   241 	X-Sound driver (GSXB compatible):
   242 		http://www.uni-ulm.de/~s_thuth/atari/xsound_e.html
   243 
   244 -- 
   245 Patrice Mandin <pmandin@caramail.com>
   246 http://membres.lycos.fr/pmandin/