patch-2.1.97 linux/Documentation/powerpc/sound.txt

• Lines: 89
• Date: Tue Apr 14 17:33:40 1998
• Orig file: v2.1.96/linux/Documentation/powerpc/sound.txt
• Orig date: Sat Nov 29 10:33:18 1997

diff -u --recursive --new-file v2.1.96/linux/Documentation/powerpc/sound.txt linux/Documentation/powerpc/sound.txt
@@ -4,26 +4,31 @@
 Please mail me me (Cort Dougan, cort@cs.nmt.edu) if you have questions,
 comments or corrections.
 
-This just covers sound on the PReP systems for now, and later will
-contain information on the PowerMac's.
+Last Change: 3.24.98
 
-Sound has been tested and is working with the PowerStack and IBM Power
-Series onboard sound systems which are based on the cs4231(2) chip.
-The sound options when doing the make config are a bit different from the
-default, though.
+This just covers sound on the PReP and CHRP systems for now and later
+will contain information on the PowerMac's.
+
+Sound on PReP has been tested and is working with the PowerStack and IBM
+Power Series onboard sound systems which are based on the cs4231(2) chip.
+The sound options when doing the make config are a bit different from
+the default, though.
 
 The I/O base, irq and dma lines that you enter during the make config
 are ignored and are set when booting according to the machine type.
 This is so that one binary can be used for Motorola and IBM machines
-which use different values and isn't allowed by the driver, so things are
-hacked together in such a way as to allow this information to be set
-automatically on boot.
-
-1. PowerStack
-
-  Enable support for "Crystal CS4232 based (PnP) cards".  Although the
-  options you set are ignored and determined automatically on boot these
-  are included for information only:
+which use different values and isn't allowed by the driver, so things
+are hacked together in such a way as to allow this information to be
+set automatically on boot.
+
+1. Motorola PowerStack PReP machines
+
+  Enable support for "Crystal CS4232 based (PnP) cards" and for the
+  Microsoft Sound System.  The MSS isn't used, but some of the routines
+  that the CS4232 driver uses are in it.
+
+  Although the options you set are ignored and determined automatically
+  on boot these are included for information only:
 
   (830) CS4232 audio I/O base 530, 604, E80 or F40
   (10) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15
@@ -33,16 +38,31 @@
   This will allow simultaneous record and playback, as 2 different dma
   channels are used.
 
+  The sound will be all left channel and very low volume since the
+  auxiliary input isn't muted by default.  I had the changes necessary
+  for this in the kernel but the sound driver maintainer didn't want
+  to include them since it wasn't common in other machines.  To fix this
+  you need to mute it using a mixer utility of some sort (if you find one
+  please let me know) or by patching the driver yourself and recompiling.
+
+  There is a problem on the PowerStack 2's (PowerStack Pro's) using a
+  different irq/drq than the kernel expects.  Unfortunately, I don't know
+  which irq/drq it is so if anyone knows please email me.
+
   Midi is not supported since the cs4232 driver doesn't support midi yet.
 
-2. IBM machines
+2. IBM PowerPersonal PReP machines and IBM LongTrail CHRP
 
   I've only tested sound on the Power Personal Series of IBM workstations
-  so if you try it on others please let me know the result.
+  so if you try it on others please let me know the result.  I'm especially
+  interested in the 43p's sound system, which I know nothing about.
 
-  Enable support for "Crystal CS4232 based (PnP) cards".  Although the
-  options you set are ignored and determined automatically on boot these
-  are included for information only:
+  Enable support for "Crystal CS4232 based (PnP) cards" and for the
+  Microsoft Sound System.  The MSS isn't used, but some of the routines
+  that the CS4232 driver uses are in it.
+
+  Although the options you set are ignored and determined automatically
+  on boot these are included for information only:
 
   (530) CS4232 audio I/O base 530, 604, E80 or F40
   (5) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15
@@ -54,4 +74,3 @@
   This setup does _NOT_ allow for recording yet.
 
   Midi is not supported since the cs4232 driver doesn't support midi yet.
-