1	How to try to survive an IBM Mwave under Linux SB drivers
2
3
4+	IBM have now released documentation of sorts and Torsten is busy
5	trying to make the Mwave work. This is not however a trivial task.
6
7----------------------------------------------------------------------------
8
9OK, first thing - the IRQ problem IS a problem, whether the test is bypassed or
10not.  It is NOT a Linux problem, but an MWAVE problem that is fixed with the
11latest MWAVE patches. So, in other words, don't bypass the test for MWAVES!
12
13I have Windows 95 on /dev/hda1, swap on /dev/hda2, and Red Hat 5 on /dev/hda3.
14
15The steps, then:
16
17    Boot to Linux. 
18    Mount Windows 95 file system (assume mount point = /dos95).
19    mkdir /dos95/linux
20    mkdir /dos95/linux/boot
21    mkdir /dos95/linux/boot/parms
22
23    Copy the kernel, any initrd image, and loadlin to /dos95/linux/boot/.
24
25    Reboot to Windows 95.
26
27    Edit C:/msdos.sys and add or change the following:
28
29        Logo=0
30        BootGUI=0
31
32    Note that msdos.sys is a text file but it needs to be made 'unhidden',
33    readable and writable before it can be edited.  This can be done with
34    DOS' "attrib" command.
35
36    Edit config.sys to have multiple config menus. I have one for windows 95 and
37    five for Linux, like this:
38------------
39[menu]
40menuitem=W95, Windows 95
41menuitem=LINTP, Linux - ThinkPad
42menuitem=LINTP3, Linux - ThinkPad Console
43menuitem=LINDOC, Linux - Docked
44menuitem=LINDOC3, Linux - Docked Console
45menuitem=LIN1, Linux - Single User Mode
46REM menudefault=W95,10
47
48[W95]
49
50[LINTP]
51
52[LINDOC]
53
54[LINTP3]
55
56[LINDOC3]
57
58[LIN1]
59
60[COMMON]
61FILES=30
62REM Please read README.TXT in C:\MWW subdirectory before changing the DOS= statement.
63DOS=HIGH,UMB
64DEVICE=C:\MWW\MANAGER\MWD50430.EXE
65SHELL=c:\command.com /e:2048
66-------------------
67
68The important things are the SHELL and DEVICE statements.
69
70    Then change autoexec.bat. Basically everything in there originally should be
71    done ONLY when Windows 95 is booted. Then you add new things specifically
72    for Linux.  Mine is as follows
73
74---------------
75@ECHO OFF
76if "%CONFIG%" == "W95" goto W95
77
78REM
79REM Linux stuff
80REM
81SET MWPATH=C:\MWW\DLL;C:\MWW\MWGAMES;C:\MWW\DSP
82SET BLASTER=A220 I5 D1
83SET MWROOT=C:\MWW
84SET LIBPATH=C:\MWW\DLL
85SET PATH=C:\WINDOWS;C:\MWW\DLL;
86CALL MWAVE START NOSHOW
87c:\linux\boot\loadlin.exe @c:\linux\boot\parms\%CONFIG%.par
88
89:W95
90REM
91REM Windows 95 stuff
92REM
93c:\toolkit\guard
94SET MSINPUT=C:\MSINPUT
95SET MWPATH=C:\MWW\DLL;C:\MWW\MWGAMES;C:\MWW\DSP
96REM The following is used by DOS games to recognize Sound Blaster hardware.
97REM If hardware settings are changed, please change this line as well.
98REM See the Mwave README file for instructions.
99SET BLASTER=A220 I5 D1
100SET MWROOT=C:\MWW
101SET LIBPATH=C:\MWW\DLL
102SET PATH=C:\WINDOWS;C:\WINDOWS\COMMAND;E:\ORAWIN95\BIN;f:\msdev\bin;e:\v30\bin.dbg;v:\devt\v30\bin;c:\JavaSDK\Bin;C:\MWW\DLL;
103SET INCLUDE=f:\MSDEV\INCLUDE;F:\MSDEV\MFC\INCLUDE
104SET LIB=F:\MSDEV\LIB;F:\MSDEV\MFC\LIB
105win
106
107------------------------
108
109Now build a file in c:\linux\boot\parms for each Linux config that you have.
110
111For example, my LINDOC3 config is for a docked Thinkpad at runlevel 3 with no
112initrd image, and has a parameter file named LINDOC3.PAR in c:\linux\boot\parms:
113
114-----------------------
115#   LOADLIN @param_file image=other_image root=/dev/other
116#
117#	Linux Console in docking station
118#
119c:\linux\boot\zImage.krn        # First value must be filename of Linux kernel.
120root=/dev/hda3                  # device which gets mounted as root FS
121ro                              # Other kernel arguments go here.
122apm=off
123doc=yes
1243
125-----------------------
126
127The doc=yes parameter is an environment variable used by my init scripts, not
128a kernel argument.
129
130However, the apm=off parameter IS a kernel argument!  APM, at least in my setup,
131causes the kernel to crash when loaded via loadlin (but NOT when loaded via
132LILO). The APM stuff COULD be forced out of the kernel via the kernel compile
133options. Instead, I got an unofficial patch to the APM drivers that allows them
134to be dynamically deactivated via kernel arguments. Whatever you chose to
135document, APM, it seems, MUST be off for setups like mine.
136
137Now make sure C:\MWW\MWCONFIG.REF looks like this:
138
139----------------------
140[NativeDOS]
141Default=SB1.5
142SBInputSource=CD
143SYNTH=FM
144QSound=OFF
145Reverb=OFF
146Chorus=OFF
147ReverbDepth=5
148ChorusDepth=5
149SBInputVolume=5
150SBMainVolume=10
151SBWaveVolume=10
152SBSynthVolume=10
153WaveTableVolume=10
154AudioPowerDriver=ON
155
156[FastCFG]
157Show=No
158HideOption=Off
159-----------------------------
160
161OR the Default= line COULD be
162
163Default=SBPRO
164
165Reboot to Windows 95 and choose Linux. When booted, use sndconfig to configure
166the sound modules and voilà - ThinkPad sound with Linux.
167
168Now the gotchas - you can either have CD sound OR Mixers but not both. That's a
169problem with the SB1.5 (CD sound) or SBPRO (Mixers) settings. No one knows why
170this is!
171
172For some reason MPEG3 files, when played through mpg123, sound like they
173are playing at 1/8th speed - not very useful!  If you have ANY insight
174on why this second thing might be happening, I would be grateful.
175
176===========================================================
177    _/      _/_/_/_/
178   _/_/  _/_/     _/
179  _/ _/_/ _/_/_/_/      Martin John Bartlett
180 _/  _/  _/     _/      (martin@nitram.demon.co.uk)
181_/      _/_/_/_/
182       _/
183_/    _/
184 _/_/
185===========================================================
186