patch-2.1.87 linux/Documentation/m68k/kernel-options.txt

• Lines: 128
• Date: Thu Feb 12 16:30:11 1998
• Orig file: v2.1.86/linux/Documentation/m68k/kernel-options.txt
• Orig date: Sat Nov 29 10:33:18 1997

diff -u --recursive --new-file v2.1.86/linux/Documentation/m68k/kernel-options.txt linux/Documentation/m68k/kernel-options.txt
@@ -3,8 +3,8 @@
 				  Command Line Options for Linux/m68k
 				  ===================================
 
-Date: Oct 6, 1997
-Linux/m68k version: 2.0.21
+Last Update: Nov 28, 1997
+Linux/m68k version: 2.1.64
 Author: Roman.Hodek@informatik.uni-erlangen.de (Roman Hodek)
 Update: jds@kom.auc.dk (Jes Sorensen)
 
@@ -191,6 +191,7 @@
  - "ser2": SCC channel B serial port ("Modem2"); parameters: 9600bps, 8N1
  - "ser" : default serial port
            This is "ser2" for a Falcon, and "ser1" for any other machine
+ - "midi": The MIDI port; parameters: 31250bps, 8N1
  - "par" : parallel port
            The printing routine for this implements a timeout for the
            case there's no printer connected (else the kernel would
@@ -408,19 +409,7 @@
   Often, extended interval video hardware has to be activated somehow.
 For this, see the "sw_*" options below.
 
-4.1.6) sw_acia, sw_snd6, sw_snd7
---------------------------------
-
-This specifies the method for turning on extended internal video
-hardware, like OverScan. Several methods are in use:
-
-  sw_acia: Set RTS of the keyboard ACIA high
-  sw_snd6: Set bit 6 of the PSG port A
-  sw_snd7: Set bit 7 of the PSG port A
-
-These sub-options are generally only useful together with "internal:".
-
-4.1.7) external:
+4.1.6) external:
 ----------------
 
 Syntax:
@@ -509,13 +498,13 @@
 therefore we don't support hardware-dependend functions like hardware-scroll,
 panning or blanking.
 
-4.1.8) eclock:
+4.1.7) eclock:
 --------------
 
 The external pixel clock attached to the Falcon VIDEL shifter. This
 currently works only with the ScreenWonder!
 
-4.1.9) monitorcap:
+4.1.8) monitorcap:
 -------------------
 
 Syntax: monitorcap:<vmin>;<vmax>;<hmin>;<hmax>
@@ -532,7 +521,7 @@
 
   The defaults for TV/SC1224/SC1435 cover both PAL and NTSC standards.
 
-4.1.10) keep
+4.1.9) keep
 ------------
 
 If this option is given, the framebuffer device doesn't do any video
@@ -650,7 +639,62 @@
     can be performed in optimal order. Not all SCSI devices support
     tagged queuing (:-().
 
+4.6 switches=
+-------------
+
+Syntax: switches=<list of switches>
+
+  With this option you can switch some hardware lines that are often
+used to enable/disable certain hardware extensions. Examples are
+OverScan, overclocking, ...
+
+  The <list of switches> is a comma-separated list of the following
+items:
+
+  ikbd: set RTS of the keyboard ACIA high
+  midi: set RTS of the MIDI ACIA high
+  snd6: set bit 6 of the PSG port A
+  snd7: set bit 6 of the PSG port A
+
+It doesn't make sense to mention a switch more than once (no
+difference to only once), but you can give as many switches as you
+want to enable different features. The switch lines are set as early
+as possible during kernel initialization (even before determining the
+present hardware.)
+
+  All of the items can also be prefixed with "ov_", i.e. "ov_ikbd",
+"ov_midi", ... These options are meant for switching on an OverScan
+video extension. The difference to the bare option is that the
+switch-on is done after video initialization, and somehow synchronized
+to the HBLANK. A speciality is that ov_ikbd and ov_midi are switched
+off before rebooting, so that OverScan is disabled and TOS boots
+correctly.
+
+  If you give an option both, with and without the "ov_" prefix, the
+earlier initialization ("ov_"-less) takes precedence. But the
+switching-off on reset still happens in this case.
+
+4.5) stram_swap=
+----------------
+
+Syntax: stram_swap=<do_swap>[,<max_swap>]
 
+  This option is available only if the kernel has been compiled with
+CONFIG_STRAM_SWAP enabled. Normally, the kernel then determines
+dynamically whether to actually use ST-RAM as swap space. (Currently,
+the fraction of ST-RAM must be less or equal 1/3 of total memory to
+enable this swapping.) You can override the kernel's decision by
+specifying this option. 1 for <do_swap> means always enable the swap,
+even if you have less alternate RAM. 0 stands for never swap to
+ST-RAM, even if it's small enough compared to the rest of memory.
+
+  If ST-RAM swapping is enabled, the kernel usually uses all free
+ST-RAM as swap "device". (If the kernel resides in ST-RAM, the region
+allocated by it is obviously never used for swapping :-) You can also
+limit this amount by specifying the second parameter, <max_swap>, if
+you want to use parts of ST-RAM as normal system memory. <max_swap> is
+in kBytes and the number should be a multiple of 4 (otherwise: rounded
+down).
 
 5) Options for Amiga Only:
 ==========================