Beagleboard Xm

OK, try this new ROM image

Somehow I managed to get both GPIO settings wrong in the previous image, so everything got turned off instead of on, including the serial port (since the DVI & serial port power controls seem to share a GPIO on the -xM). And if you’re wondering how the serial port can work on boot but DVI can’t, then I’m hoping it’s because the initial state of the pin would have been floating since that particular bank of GPIOs default to input instead of output.

What do I need to access the BB serial port from my Iyonix (USB to RS232 or RS232 to RS232, null-modem or straight?)

I don’t think there are any USB-RS232 drivers for RISC OS, so a straight m/f serial cable is your best bet.

...and what is the best terminal program to use?

It’s by no means the “best” (Escape quits the program instead of sending the escape character to the beagleboard, and closing the task window without quitting the program via escape will leave the serial port stuck in a “claimed” state), but I’ve uploaded a copy of the BASIC app I’ve been using to here. It needs the serial block drivers (which I’m fairly certain come pre-installed on the Iyonix), and is configured to use serial port 2 of the Iyonix (although in theory it should work on port 1 if you change the value of port% to 0). With other modifications (e.g. using the right block driver) it should be possible to use it with RiscPC’s too.

I take it you’ve already seen this GPIO selection info (or similar elsewhere). However, as it’s a hardware page, perhaps not too relevant after all.

The page is relevant, but that section isn’t :) That section talks about pin mux settings, which are handled almost exclusively by x-loader and u-boot.

(Or is that just SGX?)

Just the SGX.

I don’t think there are any USB-RS232 drivers for RISC OS

I came close to doing one a long time ago. I even used it on a direct call basis. As you hinted, a block driver would be the best thing to use. However, as far as I can see, that requires the USB device to exchange data under interrupts. (This is all a long time ago, I’m forgetting…!) How does one handle a USB device under interrupts?

If you load the ‘demo’ image fot the Beagleboard XM and write it to a 4Gbyte SD card (as described below):

The demo image is some 984Mbytes (compressed) almost filling a 4Gbyte SD card. It does include a Linux GUI (WIMP environment).

Unzip it with 7-zip and write it to your SD card with Win32Imager

then you will see the FAT partition contains:

md5sum/txt
MLO
ramdisk/gz
ramfs/img
u-boot/bin
uImage
user/scr

You should copy ‘riscos’ (the ROM image for RISC OS) into this directory (ROM image available here) as well as a file you create called ‘combi’, a text file containing:

echo Press USER button to enter RISC OS
sleep 10
mmc init
if userbutton; then fatload mmc 0 0x80100000 riscos; go 0x80100000; fi
echo Entering Angstrom GUI
setenv bootargs 'console=ttyS2,115200n8 console=tty0 root=/dev/mmcblk0p2 rw roofstype=ext3 rootwait omapfb.mode=dvi:1280x1024MR-16@60'
setenv bootcmd 'fatload mmc 0 0x80300000 uImage; bootm 0x80300000'
boot

then place the SD card into the beagleboard on let it start up in the Angstrom command line and then do the following:

login: root
root(at)beagleboard.org ~# mkimage -A arm -O u-boot -T script -C none -n "RISC OS Beagleboard boot script" -d /media/mmcblk0p1/combi /media/mmcblk0p1/boot.scr

This adds a file ‘boot.scr’ (not originally provided) to the FAT partition which will be executed on start-up in preference to ‘user.scr’ unless the USER button is initially pressed.

You will now find that the Beaglebaord will boot up into: (1) the validation image if the user button is pressed initially (2) RISC OS if the USER button is pressed when prompted (about 6 sec after start) (3) the Angstrom demo GUI if the USER button is not pressed

Clearly it is getting better – many thanks to all. However it still gives a blank screen. RISC OS is running because an ‘f12’ causes the ‘star’ prompt on the serial port terminal, see below:

What is not obvious is that the ‘Help on keyword help’ bit all appears top-bit-set on the beagleboard and so is unreadable!

Texas Instru X-Loader 1.4.4ss (Aug 19 2010 - 02:49:27)
Beagle xM Rev A
Reading boot sector
Loading u-boot.bom mmc

U-Boot 2010.03-dirty (Aug 20 2010 - 20:50:46)

OMAP3630/3730-GP ES1.0, CPU-OPP2, L3-165MHz,
OMAP3 Beagle board + LPDDR/NAND
I2C:   ready
DRAM:  512 MB
NAND:  256 MiB
*** Warning - ba or NAND, using default environment

In:    serial
O serial
Err:   serial

Probing for expansion boards, if none are connected you'll see a harmless I2C er
ror.

No EEPROM on expansion board
Die ID #5c6200001bf00000015739ea0703401e
Hit any key to stop autoboot:  0
mmc1 is availablhe user button is currently NOT pressed.
reading boot.scr

436 bytes read
Running bootscript from mmc ...
## Executing script at 80200000
Press USER button to enter RISC OS
mmc1 is availablThe user button is currently PRESSED.
reading riscos

4194304 bytes
              ## Starting application at 0x80100000 ...
OMAP3 HAL init
Board config=BeagleBoard
HAL_Init
I2C_Init
GPIO_Init
GPIO  for XM
Video_init
USB_Init
Timer_Init
Interrupt_Init
GPMC_Init
BHAL initialised
InitCMOSCache entry
InitCMOSCache done
IMB_Full done
Keyboard scan complete
FIQ enabled
IRQ enabled
VduInit
Executet
Machine ID duff,zero substituted
KeyInit
MouseInit
OscliInit
Enabling IRQs
IRQs on
Debug terminal on
HAL_InitDevices
HAL RTC detected!
Leaving LookForHALRTC
InitVariables
AMBControl_Init
ModuleInit
init mod UtilityModule
init mod PCI
init mod FileSwitch
init mod ResourceFS
init mod TerritoryManager
init mod Messages
init mod MessageTrans
init mod UK
init mod WindowManager
init mod Desktop
init mod SharedCLibrary
init mod OMAPVideo
OMAPVideo:
           OMAPVideo: ***** Debug Session Started ******************************
********
        OMAPVideo: DebugLib is (c) Pace Micro Technology plc. 1997-2001
                                                                       OMAPVideo
: System: DebugLib 0.65
                       OMAPVideo:         remotedb 0.10
                                                       OMAPVideo:         PDebug
 0.07
     OMAPVideo: Task:   OMAPVideo
                                 OMAPVideo: Time:   Fri Jan  2 00:00:00 1970
                                                                            OMAP
Video: Levels: Not specified.
                             OMAPVideo: ****************************************
**************************
                          OMAPVideo: Using DMA channel at f9e56c20
                                                                  OMAPVideo: dss
_reset
      OMAPVideo: Finished module initialisation, DSS regs=f9e50000
                                                                  init mod TaskM
anager
init mod ARM
init mod BASIC
init mod BASIC64
init mod BASICTrans
init mod BufferManager
init mod ColourTrans
init mod Debugger
init mod DeviceFS
init mod Portable
init mod RTSupport
init mod USBDriver
init mod EHCIDriver
init mod MUSBDriver
init mod DisplayManager
init mod DMAManager
init mod DragASprite
init mod DragAnObject
init mod Draw
init mod BBCEconet
 error: No 'Econet' installed
init mod FileCore
init mod RamFS
 error: RAM disc size too small
init mod Filer
init mod FilerSWIs
init mod FSLock
init mod FontManager
init mod FPEmulator
init mod Free
init mod Hourglass
init mod IIC
init mod International
init mod InternationalKeyboard
init mod InverseTable
init mod NetFS
 error: No 'Econet' installed
init mod NetFiler
init mod NetPrint
 error: No 'Econet' installed
init mod NetStatus
init mod NetUtils
init mod Obey
init mod Pinboard
init mod PipeFS
init mod RAMFSFiler
init mod ResourceFiler
init mod ROMFonts
init mod ScreenBlanker
init mod ScrSaver
init mod ShellCLI
init mod SoundDMA
init mod SoundControl
init mod SoundChannels
init mod SoundScheduler
init mod SpriteExtend
init mod SpriteUtils
init mod Squash
init mod SuperSample
init mod SystemDevices
init mod TaskWindow
init mod WindowUtils
init mod FilterManager
init mod WaveSynth
init mod StringLib
init mod Percussion
init mod Filer_Action
init mod DOSFS
init mod SCSIdriver
init mod SCSISoftUSB
init mod SCSIFS
init mod SCSIFiler
init mod ColourPicker
init mod ScreenModes
init mod DrawFile
init mod BootCommands
init mod AUNMsgs
init mod MbufManager
init mod Internet
init mod Resolver
init mod Net
 error: AUN not configured
init mod BootNet
init mod Freeway
init mod ShareFS
init mod MimeMap
init mod LanManFS
init mod DHCP
init mod !Edit
init mod !Draw
init mod !Paint
init mod !Alarm
init mod !Chars
init mod !Help
init mod TinyStubs
init mod Toolbox
init mod Window
init mod ToolAction
init mod Menu
init mod Iconbar
init mod ColourDbox
init mod ColourMenu
init mod DCS
init mod FileInfo
init mod FontDbox
init mod FontMenu
init mod PrintDbox
init mod ProgInfo
init mod SaveAs
init mod Scale
init mod TextGadgets
init mod CDFSdriver
init mod CDFS
init mod CDFSFiler
mod init done
Service_PostInit
callbacks
OMAPVideo: dispc_set_lcdmode: rate=25175000 syncpol=3
                                                     OMAPVideo: hsw=96 hfp=18 hb
p=46 width=640
              OMAPVideo: vsw=2 vfp=11 vbp=32 height=480
                                                       OMAPVideo: dsi_pll_progra
m_for_dispc: Changing pixel rate from 0 to 25175000
                                                   OMAPVideo: REGM=122 REGN=6 RE
GM3=8 REGM4=8
             OMAPVideo: Fint=1857142
                                    OMAPVideo: dsi_pll_program_for_dispc: Done
                                                                              OM
APVideo: dispc_set_lcdmode: Done (0)

RISC OS 512MB

Cortex-A8 Processor

Acorn SCSIFS

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ffflxE~``|``~F~``|```G<f`nff<Hfff~fffI~~J>

                                          l8KflxpxlfL``````~McwkkccNffv~nffO<fff
ff<P|ff|```Q<fffjl6R|ff|lffS<f`<f<T~Uffffff<Vfffff<WcckkwcXff<<ffYfff<Z~
                                                                        0`~[|```
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lfl8<m6kkcn|ffffo<fff<p|ff|``q>ff>rlv```s>`<|t00|000uffff>vfff<wckk6xf<<fyfff><z
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                                 ffff>û<ffff>üfffff>ý
                                                     fff><þ``|f|``ÿffff><No keyb
oard present - autobooting
Boot:Utils.Unplu
Boot:Choices.Boot.PreDesk.!+Resource
Boot:Choices.Boot.PreDesk.ARPlayer

Boot:Choices.Boot.PreDesk.DALimit
Boot:Choices.Boot.PreDesk.NewLook

Boot:Choices.Boot.PreDesk.SetupNet

Boot:Choices.Boot.PreDesk.~SetupMimeMap

Boot:Choices.Boot.PreDesk.Configure

Boot:Choices.Boot.PreDesk.SoftSCSI

OMAPVideo: dispc_set_lcdmode: rate=49500000 syncpol=4
                                                     OMAPVideo: hsw=80 hfp=46 hb
p=46 width=800
              OMAPVideo: vsw=3 vfp=1 vbp=21 height=600
                                                      OMAPVideo: Disabling LCD p
rior to update
              OMAPVideo: dsi_pll_program_for_dispc: Changing pixel rate from 251
75000 to 49500000
                 OMAPVideo: REGM=396 REGN=7 REGM3=12 REGM4=15
                                                             OMAPVideo: Fint=162
5000
    OMAPVideo: dsi_pll_program_for_dispc: Done
                                              OMAPVideo: dispc_set_lcdmode: Done
 (0)
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5Vþ€JUo&=ƒ

****help
> Help on keyword Help
*Help <subjects> attempts to give useful information on the selected topics. Spe
cial keywords
include:
Commands        List all the available utility commands
FileCommands    List all the filing system-specific commands
Modules         List the module titles
Syntax          Explain the syntax message format
**basic
ARM BBC BASIC V version 1.44 (C) Acorn 1989

Starting with 651516 bytes free

>CLS

>*fx0

RISC OS 5.17Jan 2010)
>*romm.
No. Position    Module Name             Version Status
  1 System ROM  UtilityModule           5.17    Active
  2 System ROM  PCI                     0.09    Active
  3 System ROM  FileSwitch              2.67    Active
  4 System ROM  ResourceFS              0.25    Active
  5 System ROM  TerritoryManager        0.43    Active
  6 System ROM  Messages                1.07    Active
  7 System ROM  MessageTrans            0.47    Active
  8 System ROM  UK                      0.51    Active
  9 System ROM  WindowManager           5.08    Active
 10 System ROM  Desktop                 2.70    Active
 11 System ROM  SharedCLibrary          5.56    Active
 12 System ROM  OMAPVideo               0.04    Active
 13 System ROM  TaskManager             1.29    Active
 14 System ROM  ARM                     0.21    Active
 15 System ROM  BASIC                   1.44    Running
 16 System ROM  BASIC64                 1.44    Active
 17 System ROM  BASICTrans              2.10    Active
 18 System ROM  BufferManager           0.38    Active
 19 System ROM  ColourTrans             1.77    Active
 20 System ROM  Debugger                1.81    Active
 21 System ROM  DeviceFS                0.68    Active
 22 System ROM  Portable                0.69    Active
 23 System ROM  RTSupport               0.05    Active
 24 System ROM  USBDriver               0.49    Active
 25 System ROM  EHCIDriver              0.16    Active
 26 System ROM  MUSBDriver              0.05    Active
 27 System ROM  DisplayManager          0.40    Active
 28 System ROM  DMAManager              0.18    Active
 29 System ROM  DragASprite             0.15    Active
 30 System ROM  DragAnObject            0.09    Active
 31 System ROM  Draw                    1.19    Active
 32 System ROM  BBCEconet               0.18    Dormant
 33 System ROM  FileCore                3.36    Active
 34 System ROM  RamFS                   2.21    Dormant
 35 System ROM  Filer                   2.25    Active
 36 System ROM  FilerSWIs               0.05    Active
 37 System ROM  FSLock                  1.22    Active
 38 System ROM  FontManager             3.66    Active
 39 System ROM  FPEmulator              4.28    Active
 40 System ROM  Free                    0.39    Active
 41 System ROM  Hourglass               2.16    Active
 42 System ROM  IIC                     0.18    Active
 43 System ROM  International           1.67    Active
 44 System ROM  InternationalKeyboard   0.91    Active
 45 System ROM  InverseTable            0.15    Active
 46 System ROM  NetFS                   5.94    Dormant
 47 System ROM  NetFiler                0.79    Active
 48 System ROM  NetPrint                5.58    Dormant
 49 System ROM  NetStatus               2.09    Active
 50 System ROM  NetUtils                2.02    Active
 51 System ROM  Obey                    0.39    Active
 52 System ROM  Pinboard                0.88    Active
 53 System ROM  PipeFS                  0.22    Active
 54 System ROM  RAMFSFiler              0.38    Active
 55 System ROM  ResourceFiler           0.18    Active
 56 System ROM  ROMFonts                0.75    Active
 57 System ROM  ScreenBlanker           2.32    Active
 58 System ROM  ScrSaver                0.14    Active
 59 System ROM  ShellCLI                0.33    Active
 60 System ROM  SoundDMA                1.67    Active
 61 System ROM  SoundControl            1.00    Active
 62 System ROM  SoundChannels           1.35    Active
 63 System ROM  SoundScheduler          1.28    Active
 64 System ROM  SpriteExtend            1.21    Active
 65 System ROM  SpriteUtils             1.13    Active
 66 System ROM  Squash                  0.29    Active
 67 System ROM  SuperSample             0.14    Active
 68 System ROM  SystemDevices           1.31    Active
 69 System ROM  TaskWindow              0.72    Active
 70 System ROM  WindowUtils             2.53    Active
 71 System ROM  FilterManager           0.24    Active
 72 System ROM  WaveSynth               1.19    Active
 73 System ROM  StringLib               1.16    Active
 74 System ROM  Percussion              1.15    Active
 75 System ROM  Filer_Action            0.48    Active
 76 System ROM  DOSFS                   0.87    Active
 77 System ROM  SCSIdriver              2.06    Active
 78 System ROM  SCSISoftUSB             0.12    Active
 79 System ROM  SCSIFS                  1.17    Active
 80 System ROM  SCSIFiler               1.19    Active
 81 System ROM  ColourPicker            0.50    Active
 82 System ROM  ScreenModes             0.30    Active
 83 System ROM  DrawFile                1.55    Active
 84 System ROM  BootCommands            1.39    Active
 85 System ROM  AUNMsgs                 0.18    Active
 86 System ROM  MbufManager             0.26    Active
 87 System ROM  Internet                5.52    Active
 88 System ROM  Resolver                0.69    Active
 89 System ROM  Net                     6.20    Dormant
 90 System ROM  BootNet                 0.95    Active
 91 System ROM  Freeway                 0.34    Active
 92 System ROM  ShareFS                 3.52    Active
 93 System ROM  MimeMap                 0.15    Active
 94 System ROM  LanManFS                2.34    Active
 95 System ROM  DHCP                    0.21    Active
 96 System ROM  !Edit                   1.65    Active
 97 System ROM  !Draw                   1.15    Active
 98 System ROM  !Paint                  2.01    Active
 99 System ROM  !Alarm                  2.79    Active
100 System ROM  !Chars                  1.22    Active
101 System ROM  !Help                   3.16    Active
102 System ROM  TinyStubs               0.14    Active
103 System ROM  Toolbox                 1.52    Active
104 System ROM  Window                  1.71    Active
105 System ROM  ToolAction              0.30    Active
106 System ROM  Menu                    0.36    Active
107 System ROM  Iconbar                 1.20    Active
108 System ROM  ColourDbox              0.19    Active
109 System ROM  ColourMenu              0.21    Active
110 System ROM  DCS                     1.12    Active
111 System ROM  FileInfo                0.19    Active
112 System ROM  FontDbox                0.18    Active
113 System ROM  FontMenu                0.24    Active
114 System ROM  PrintDbox               0.16    Active
115 System ROM  ProgInfo                0.18    Active
116 System ROM  SaveAs                  0.19    Active
117 System ROM  Scale                   0.15    Active
118 System ROM  TextGadgets             0.31    Active
119 System ROM  CDFSdriver              2.39    Active
120 System ROM  CDFS                    2.49    Active
121 System ROM  CDFSFiler               2.47    Active
>*help modules
> Help on keyword Modules
Modules lists the modules currently loaded, giving the name and address of the
module, and also the
address of its workspace.
See also ROMModules.
Modules loaded are:

	
MOS Utilities   5.17 (19 Jan 2010)
PCI Manager     0.09 (16 Jun 2009)
FileSwitch      2.67 (15 Jun 2009)
ResourceFS      0.25 (19 Jan 2010)
Territory Mgr   0.43 (24 Apr 2009)
UK Messages     1.07 (19 Jan 2010)
MessageTrans    0.47 (03 Apr 2010)
UK Territory    0.51 (16 Apr 2002)
Window Manager  5.08 (14 Mar 2010)
Desktop         2.70 (18 Jan 2010)
C Library       5.56 (28 Nov 2009)
OMAPVideo       0.04 (20 May 2010)
Task Manager    1.29 (19 Jan 2010)
ARM             0.21 (19 Jan 2010)
BBC BASIC V     1.44 (16 Jun 2009)
BBC BASIC VI    1.44 (16 Jun 2009)
BASICTrans      2.10 (24 Apr 2009) International
Buffer Manager  0.38 (19 Jan 2010)
Colour Selector 1.77 (16 Jun 2009)
Debugger        1.81 (22 Mar 2010)
DeviceFS        0.68 (06 Nov 2009)
Portable        0.69 (21 Mar 2010)
RTSupport       0.05 (22 Oct 2009)
USBDriver       0.49 (18 Jul 2010)
EHCIDriver      0.16 (18 Jul 2010)
MUSBDriver      0.05 (20 Oct 2009)
DisplayManager  0.40 (13 May 2009)
DMAManager      0.18 (28 Nov 2009)
Drag A Sprite   0.15 (16 Mar 2001)
Drag An Object  0.09 (26 Apr 2005)
Drawing Module  1.19 (28 Oct 2009)
FileCore        3.36 (14 Nov 2009)
Filer           2.25 (09 Mar 2010)
FilerSWIs       0.05 (16 Mar 2001)
FSLock          1.22 (11 Jun 2009)
Font Manager    3.66 (02 Jan 2010)
FPEmulator      4.28 (04 Dec 2009) (1.13CELM)
Free            0.39 (26 Nov 2002)
Hourglass       2.16 (29 Nov 2002)
IIC             0.18 (13 Jul 2004) 4.5.2.5
International   1.67 (06 Nov 2009)
Int’l Keyboard  0.91 (19 Jan 2010)
Inverse Table   0.15 (23 Mar 2001)
NetFiler        0.79 (17 Jan 2003)
NetStatus       2.09 (17 Jan 2003)
NetUtils        2.02 (26 Jun 2003)
Obey            0.39 (26 Jun 2003)
Pinboard        0.88 (04 Oct 2008)
PipeFS          0.22 (14 May 2001)
RAMFSFiler      0.38 (13 Jan 2003)
ResourceFiler   0.18 (14 May 2001)
ROM Fonts       0.75 (19 Jan 2010)
ScreenBlanker   2.32 (02 Jul 2001)
ScrSaver        0.14 (15 Apr 1998)
ShellCLI        0.33 (23 Oct 2002)
SoundDMA        1.67 (28 Feb 2010) HAL version
Sound Control   1.00 (17 Feb 2003)
SoundChannels   1.35 (19 Jan 2010)
SoundScheduler  1.28 (19 Jan 2010)
SpriteExtension 1.21 (19 Jan 2010)
SpriteUtils     1.13 (19 Jan 2010)
Squash          0.29 (29 Nov 2009)
SuperSample     0.14 (19 Jan 2010)
System Devices  1.31 (19 Jan 2010)
TaskWindow      0.72 (19 Jan 2010)
Window Utils    2.53 (05 Apr 2001)
Filter Manager  0.24 (16 Mar 2001)
WaveSynth       1.19 (21 Jun 2004)
StringLib       1.16 (21 Jun 2004)
Percussion      1.15 (21 Jun 2004)
Filer_Action    0.48 (11 Jun 2009)
DOSFS           0.87 (19 Jan 2010)
SCSIdriver      2.06 (25 Oct 2009)
SCSISoftUSB     0.12 (22 Apr 2010)
SCSIFS          1.17 (14 Jul 2009)
SCSIFiler       1.19 (02 Mar 2010)
Colour Picker   0.50 (07 Jun 2009)
Screen Modes    0.30 (03 Feb 2003)
DrawFile        1.55 (19 Jan 2010)
Boot Commands   1.39 (19 Apr 2010)
AUN Messages    0.18 (07 Sep 2010)
Mbuf Manager    0.26 (15 Dec 2000) © ANT Ltd 1994-1996 & Acorn 1997-2000
Internet        5.52 (22 Dec 2008)
Resolver        0.69 (11 Jul 2004) (Acorn) © ANT Ltd, 1997
BootNet         0.95 (02 Jul 2004)
Freeway         0.34 (11 Mar 2003)
ShareFS         3.52 (01 Jul 2004) Access+
Mime Mapping    0.15 (19 Jun 2002) © ANT Ltd, 1997-2000
LanManFS        2.34 (01 Aug 2009)
DHCP client     0.21 (05 Aug 2004)
!Edit           1.65 (18 Jan 2010)
!Draw           1.15 (01 Oct 2009)
!Paint          2.01 (01 Oct 2009)
!Alarm          2.79 (11 Jun 2009)
!Chars          1.22 (29 May 2010)
!Help           3.16 (07 Sep 2010)
Tiny Stubs      0.14 (19 Jan 2010)
Toolbox         1.52 (17 Jan 2003)
Window Object   1.71 (30 Mar 2005)
ToolAction      0.30 (14 Jun 2008)
Menu            0.36 (04 May 2000)
Iconbar         1.20 (04 May 2000)
ColourDbox      0.19 (04 May 2000)
ColourMenu      0.21 (04 May 2000)
DCS Object      1.12 (15 Apr 2005)
FileInfo        0.19 (19 Jan 2010)
FontDbox        0.18 (04 May 2000)
FontMenu        0.24 (06 Nov 2001)
PrintDbox       0.16 (04 May 2000)
ProgInfo        0.18 (13 Aug 2003)
SaveAs          0.19 (29 Nov 2004)
Scale           0.15 (04 May 2000)
TextGadgets     0.31 (28 Feb 2010)
CDFSdriver      2.39 (22 Nov 2002)
CDFS            2.49 (17 May 2009)
CDFSFiler       2.47 (12 Aug 2004)
VProtect        4.04 (07 Dec 2002)
DrawPool        2.00 (04 Feb 2010)
PaintPool       2.00 (04 Feb 2010)
WimpPool        2.00 (04 Feb 2010)
WindowTools     2.00 (04 Feb 2010)
>status
Configuration status:


	
Baud       4
Boot
No Caps
Data       4
Delay      32
No Directory
DumpFormat 4
FontSize   256K
Ignore     10
Language   11
Mode       Auto
MonitorType Auto
MouseStep  2
MouseType  7
Print      1
PrinterBufferSize 1K
Quiet
RamFSSize  0K
Repeat     8
RMASize    0K
ScreenSize 160K
Scroll
SpriteSize 0K
Sync       0
SystemSize 32K
TV         0,1
WimpMode   Auto
FileSystem SCSI
Truncate   on
Territory  1
GMT
TimeZone   +0:0
WimpFlags  111
WimpFont   8
WimpDragDelay  5  1/10 second
WimpDragMove  32 OS Units
WimpDoubleClickDelay  10  1/10 second
WimpDoubleClickMove  32 OS Units
WimpAutoMenuDelay  10  1/10 second
WimpMenuDragDelay  10  1/10 second
WimpIconBarSpeed  200 OS Units / second
WimpIconBarAcceleration  100 OS Units / second²
WimpSpritePrecedence  RAM
WimpButtonType  Click
WimpIconiseButton  Off
WimpAutoFrontIconBar  On
WimpAutoFrontDelay  5  1/10 second
WimpAutoScrollDelay  5  1/10 second
WimpClickSubmenu  Off
Cache      On
FontMax1   16 points
FontMax2   36 points
FontMax3   36 points
FontMax4   16 points
FontMax5   0 points
FontMax    4096k
Country    UK
SoundSystem  16bit Oversampled
SoundDefault 1 7 1
SCSIFSDirCache 255K
SCSIFSDrive 0
BootNet    Off
FreewayAutoAddress On
FS           <unset>
LMTransport  NetBEUI
LMNameServer <unset>
CDROMBuffers 256K
CDROMDrives 0


Use *Configure to set the options.
>PRINT “abc” 
abc
>

Nice work :-) Déjà vu via serial!

...refers to in response to your post was this thread

I had read that thread.

Looks like JK’s latest posts to your thread might help:

Steve Kipisz pointed out to me “On xM the parent clock is 96MHz so 96/6=16MHz, which I think you said you were seeing 15MHz. As a quick hack I changed the PCD to 2 and now have the nice orange display on xM.” Given that, I tried a few things:

OMAP3 beagleboard.org # md 0x48050440 0x10 
48050440: 0001830b 00000004 000003ff 00ff8000    ................ 
48050450: 00000000 00000000 00000000 0000023d    ............=... 
48050460: 00000000 0ff03f31 01400504 00007028    ....1?....@.(p.. 
48050470: 00010006 00000000 00ef027f 02ff03ff    ................ 
OMAP3 beagleboard.org # mw.l 0x48050440 0x00018308 
OMAP3 beagleboard.org # mw.l 0x48050470 0x00010002 
OMAP3 beagleboard.org # mw.l 0x48050440 0x0001830b 

I did the above, but the result for me was a 34.4kHz / 43Hz signal that my monitor still didn’t recognize. For some register information in u-boot, check out:

1. void display_init(void)
2. static const struct panel_config dvid_cfg = {
3. void omap3_dss_panel_config(const struct panel_config *panel_cfg)
4. struct dispc_regs {

Assuming: (working with http://www.epanorama.net/faq/vga2rgb/calc.html)

Clock: 96MHz 
HFP (horizontal frontporch): 36 
HSW (horizontal sync): 201 
HBP (backporch): 676 
VFP (vertical): 5 
VSW: 9 
VBP: 44 
H freq: 49.56kHz (1024x768 VESA = 48.36kHz) 
V freq: 60Hz (matches VESA) 

timing_h: 676 << 20 | 36 << 8 | 201 = 0x1A4024C9 
timing_v: 44 << 20 |  5 << 8 | 9 = 0x02C00509 

OMAP3 beagleboard.org # mw.l 0x48050440 0x00018308 
OMAP3 beagleboard.org # mw.l 0x48050464 0x1A4024C9 
OMAP3 beagleboard.org # mw.l 0x48050468 0x02C00509 
OMAP3 beagleboard.org # mw.l 0x48050470 0x00010002 
OMAP3 beagleboard.org # mw.l 0x48050440 0x0001830b 

Orange screen lives!

What is not obvious is that the ‘Help on keyword help’ bit all appears top-bit-set on the beagleboard and so is unreadable!

Those random garbage characters aren’t (or shouldn’t be) the help text. The first bunch of garbage is (I think) the system font being redefined, and the second bunch is all the VDU commands being used to render the desktop.

But if it ran the boot sequence then at least we know USB is working :)

Looks like JK’s latest posts to your thread might help:

Nope. RISC OS uses (or should be using!) the DSI PLL, not DPLL4 (which is what u-boot uses). Assuming everything is working right the DSI PLL should be configured to take its input from the system clock. And according to some of the earlier debug output Chris posted the system clock rate is being correctly detected as 13MHz.

Chris: Can you post the output of *videoregs? I think that should list the contents of all the relevant registers, except for a few PRCM registers which I’d have to look up the address of when I get home.

This hack unfortunately gives an ‘out of scan’ on my monitor :(

But, as you say, it is wholly irrelevant to RISC OS!

>**videoregs
f9e50010: 00000001 dss.sysconfig
f9e50014: 00000001 dss.sysstatus
f9e50018: 00000000 dss.irqstatus
f9e50040: 00000001 dss.control
f9e50044: 00000000 dss.sdi_control
f9e50048: 00000000 dss.pll_control
f9e5005c: 00000082 dss.sdi_status
f9e50410: 00000001 dispc.sysconfig
f9e50414: 00000001 dispc.sysstatus
f9e50418: 000021ac dispc.irqstatus
f9e5041c: 00005642 dispc.irqenable
f9e50440: 00018309 dispc.control
f9e50444: 0000be00 dispc.config
f9e5044c: 00000000 dispc.default_color[0]
f9e50450: 00000000 dispc.default_color[1]
f9e50454: 00000001 dispc.trans_color[0]
f9e50458: 00000001 dispc.trans_color[1]
f9e5045c: 00000098 dispc.line_status
f9e50460: 00000000 dispc.line_number
f9e50464: 02d02d4f dispc.timing_h
f9e50468: 01500102 dispc.timing_v
f9e5046c: 00000028 dispc.pol_freq
f9e50470: 00010002 dispc.divisor
f9e50474: 00000000 dispc.global_alpha
f9e50478: 00000000 dispc.size_dig
f9e5047c: 0257031f dispc.size_lcd
f9e50480: 80000000 dispc.gfx.ba[0]
f9e50484: 80000000 dispc.gfx.ba[1]
f9e50488: 00000000 dispc.gfx.position
f9e5048c: 0257031f dispc.gfx.size
f9e504a0: 00004087 dispc.gfx.attributes
f9e504a4: 03ff03c0 dispc.gfx.fifo_threshold
f9e504a8: 00000400 dispc.gfx.fifo_size_status
f9e504ac: 00000001 dispc.gfx.row_inc
f9e504b0: 00000001 dispc.gfx.pixel_inc
f9e504b4: 00000000 dispc.gfx.window_skip
f9e504b8: 82400020 dispc.gfx.table_ba
f9e504bc: 00000000 dispc.vid1.ba[0]
f9e504c0: 00000000 dispc.vid1.ba[1]
f9e504c4: 00000000 dispc.vid1.position
f9e504c8: 00000000 dispc.vid1.size
f9e504cc: 00000000 dispc.vid1.attributes
f9e504d0: 03ff03c0 dispc.vid1.fifo_threshold
f9e504d4: 00000400 dispc.vid1.fifo_size_status
f9e504d8: 00000001 dispc.vid1.row_inc
f9e504dc: 00000001 dispc.vid1.pixel_inc
f9e504e0: 00000000 dispc.vid1.fir
f9e504e4: 00000000 dispc.vid1.picture_size
f9e5054c: 82400420 dispc.vid2.ba[0]
f9e50550: 82400420 dispc.vid2.ba[1]
f9e50554: 0166012c dispc.vid2.position
f9e50558: 001f001f dispc.vid2.size
f9e5055c: 00000000 dispc.vid2.attributes
f9e50560: 03ff03c0 dispc.vid2.fifo_threshold
f9e50564: 00000400 dispc.vid2.fifo_size_status
f9e50568: 00000001 dispc.vid2.row_inc
f9e5056c: 00000001 dispc.vid2.pixel_inc
f9e50570: 00000000 dispc.vid2.fir
f9e50574: 001f001f dispc.vid2.picture_size
f9e505d4: 00000000 dispc.data_cycle[0]
f9e505d8: 00000000 dispc.data_cycle[1]
f9e505dc: 00000000 dispc.data_cycle[2]
f9e50620: 00000100 dispc.cpr_coef_r
f9e50624: 00080000 dispc.cpr_coef_g
f9e50628: 40000000 dispc.cpr_coef_b
f9e5062c: 00000060 dispc.gfx_preload
f9e50630: 00000060 dispc.vid_preload[0]
f9e50634: 00000100 dispc.vid_preload[1]
f9e4ff00: 00000000 dsi_pll.control
f9e4ff04: 00000082 dsi_pll.status
f9e4ff08: 00000000 dsi_pll.go
f9e4ff0c: 07e18c0f dsi_pll.configuration1
f9e4ff10: 0001210c dsi_pll.configuration2
Ban state: 00000000
>

That looks OK, apart from the fact that we’re writing to a field that’s now been removed. I doubt that will affect things, but just in case I’ve uploaded a new ROM image

Also, what monitor are you using? It looks like you’re using a 75Hz 800×600 mode from one of the AKF MDFs. But those modes all specify border values, which the video driver currently ignores – so instead of getting 75Hz (with a 46.8kHz line rate) you’re getting 81.5Hz (with a 50.9kHz line rate). But that won’t explain why you’re not getting any video from before the boot sequence has run :( (Unless it’s just a simple case of your monitor not liking the startup mode, which isn’t quite standard VGA timings according to that calculator thing)

Also, can you give the output of these commands:

*memory p 48004a40 + 4
*memory p 48004d00 + 4
*memory p 48004d20 + 4
*memory p 48004d40 + 14
*memory p 48004e00 + 4
*memory p 48004e10 + 4
*memory p 48004e20 + 4
*memory p 48004e30 + 4
*memory p 48004e40 + 10

I think that’s all the registers that are relevant to the video clocks…

New ROM image (as above).

My monitor is a 1920×1080 Dell P2310H - it says no signal (it says something different if there is a signal but with timing out of spec).

It starts up (screen still blank):

No keyboard present - autobooting
Boot:Utils.UnplugTbox
Boot:Choices.Boot.PreDesk.!+Resource
Boot:Choices.BooDesk.ARPlayer

Boot:Choices.Boot.PreDesk.DALimit
Boot:Choices.Boot.PreDesk.NewLook

Bo:Choices.Boot.PreDesk.SetupNet

Boot:Choices.Boot.PreDesk.~SetupMimeMap

Boot:Choices.Boot.PreDesk.Configure

Boot:Choices.Boot.PreDesk.SoftSCSI

OMAPVideo: dispc_set_lcdmode: rate=49500000 syncpol=4
                                                     OMAPVideo: hsw=80 hfp=46 hb
p=46 width=800
              OMAPVideo: vsw=3 vfp=1 vbp=21 height=600
                                                      OMAPVideo: Disabling LCD p
rior to update
              OMAPVideo: dsi_pll_program_for_dispc: Changing pixel rate from 251
75000 to 49500000
                 OMAPVideo: REGM=396 REGN=7 REGM3=12 REGM4=15
                                                             OMAPVideo: Fint=162
5000
    OMAPVideo: dsi_pll_program_for_dispc: Done
                                              OMAPVideo: dispc_set_lcdmode: Done
 (0)
    ÿÿ™ÿ@¿ƒþ’’ò‚‚þ„f™B™fˆ(OO(‰òòŠ<$$çB$‹$Bç$$<ÿÿ™ÿø·eRð¿eJòÁeH®~-®~Œ~Œ,®,®~
°€‹+°€‹+M°€‹+°€%‹€%‹+%°+%°€²‚%‰‚%‰)%²)%²‚´ ‡'›°€‹+´ %‡ %‡'%´'%´ ¶"%…"%…%%¶%%¶"´„
‡É°€‹+´„%‡„%‡%´%´„¶†%…†%…%¶%¶†¬¼ç²Ï°€‹+,˜¢°€‹+¶v•}¶v”v”$¶$¶vŽ~•%¶v”v”$¶$¶v¸x“}Ž~
5Vþ†?u.?¯Ž&?-vµ}~­-–v?%†?u.?¯Ž&?-vµ}~­-–v?%?…>>„„=ƒ­o­)­of=UoAUo&=ƒ=ƒ>>„„=ƒ­o­­o
5V€J-®~µ%¶v•%®&-®~µ%¶v•%.?¯Ž&?-vµ}~­-–v?%
    *

Output from the serial terminal at the supervisor prompt (after pressing f12 after RISC OS has booted):

*help
> Help on keyword Help
*Help <subjects> attempts to give useful information on the selected topics. Spe
cial keywords
include:
Commands        List all the available utility commands
FileCommands    List all the filing system-specific commands
Modules         List the module titles
Syntax          Explain the syntax message format
*fx0
RISC OS 5.17 (19 Jan 2010)
*help memory
> Help on keyword Memory
Memory displays the values in the memory in ARM words.
Syntax: Memory P <addr1> [[|-] <addr2> [ <addr3>]]
memory p 48004a40 + 4

	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004A40 :    0000130A                                     : ....
memory p 48004d00 + 4


	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004D00 :    00370037                                     : 7.7.
memory p 48004d20 + 4



	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004D20 :    00001E3F                                     : ?...
memory p 48004d40 + 14


	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004D40 :    094C0C00    0483600C    00000009    0000780C : ..L..`ƒ…...x..
48004D50 :    00000001                                     : ....
memory p 48004e00 + 4



	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004E00 :    00000007                                     : ....
memory 48004e10 + 4


	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004E10 :    00000000                                     : ....
memory p 48004e20 + 4



	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004E20 :    00000000                                     : ....
memory p 48004e30 + 4


	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004E30 :    00000000                                     : ....
memory p 48004e40 + 10



	
Address  :     3 2 1 0     7 6 5 4     B A 9 8     F E D C :    ASCII Data
48004E40 :    00001009    00000000    00000000    00000001 : ................
status
Configuration status:


	
Baud       4
Boot
No Caps
Data       4
Delay      32
No Directory
DumpFormat 4
FontSize   256K
Ignore     10
Language   11
Mode       Auto
MonitorType Auto
MouseStep  2
MouseType  7
Print      1
PrinterBufferSize 1K
Quiet
RamFSSize  0K
Repeat     8
RMASize    0K
ScreenSize 160K
Scroll
SpriteSize 0K
Sync       0
SystemSize 32K
TV         0,1
WimpMode   Auto
FileSystem SCSI
Truncate   on
Territory  1
GMT
TimeZone   +0:0
WimpFlags  111
WimpFont   8
WimpDragDelay  5  1/10 second
WimpDragMove  32 OS Units
WimpDoubleClickDelay  10  1/10 second
WimpDoubleClickMove  32 OS Units
WimpAutoMenuDelay  10  1/10 second
WimpMenuDragDelay  10  1/10 second
WimpIconBarSpeed  200 OS Units / second
WimpIconBarAcceleration  100 OS Units / second²
WimpSpritePrecedence  RAM
WimpButtonType  Click
WimpIconiseButton  Off
WimpAutoFrontIconBar  On
WimpAutoFrontDelay  5  1/10 second
WimpAutoScrollDelay  5  1/10 second
WimpClickSubmenu  Off
Cache      On
FontMax1   16 points
FontMax2   36 points
FontMax3   36 points
FontMax4   16 points
FontMax5   0 points
FontMax    4096k
Country    UK
SoundSystem  16bit Oversampled
SoundDefault 1 7 1
SCSIFSDirCache 255K
SCSIFSDrive 0
BootNet    Off
FreewayAutoAddress On
FS           <unset>
LMTransport  NetBEUI
LMNameServer <unset>
CDROMBuffers 256K
CDROMDrives 0


Use Configure to set the options.

You will now find that the Beaglebaord will boot up into: ... (2) RISC OS if the USER button is pressed when prompted (about 6 sec after start)

I’m following the above. Rather than create a new demo image (as I don’t have a 4Gb card to hand) I copied the necessary supplied files to a fresh FAT32 card. (In the order listed here .)

Texas Instruments X-Loader 1.4.4ss (Aug 19 2010 - 02:49:27)
Beagle xM Rev A
Reading boot sector
Loading u-boot.bin from mmc

U-Boot 2010.03-dirty (Aug 20 2010 - 20:50:46)

OMAP3630/3730-GP ES1.0, CPU-OPP2, L3-165MHz, 
OMAP3 Beagle board + LPDDR/NAND
I2C:   ready
DRAM:  512 MB
NAND:  256 MiB
*** Warning - bad CRC or NAND, using default environment

In:    serial
Out:   serial
Err:   serial

Probing for expansion boards, if none are connected you'll see a harmless I2C error.

No EEPROM on expansion board
Beagle xM Rev A
Die ID #008e0000061000000156166b0a022005
Hit any key to stop autoboot:  3  2  1  0 
mmc1 is available
The user button is currently NOT pressed.
reading boot.scr

435 bytes read
Running bootscript from mmc ...
## Executing script at 80200000
Press USER button to enter RISC OS
mmc1 is available
The user button is currently PRESSED.
reading riscos

0 bytes read
## Starting application at 0x80100000 ...

The Angstrom Distribution beagleboard ttyS2

Angstrom 2010.7-test-20100820 beagleboard ttyS2

beagleboard login: root
root@beagleboard:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                63.0M     46.0M     13.8M  77% /
devtmpfs                218.7M    172.0K    218.5M   0% /dev
none                    218.7M    172.0K    218.5M   0% /dev
/dev/mmcblk0p1          239.2M     26.3M    212.9M  11% /media/mmcblk0p1
tmpfs                   218.7M     28.0K    218.7M   0% /var/volatile
tmpfs                   218.7M         0    218.7M   0% /dev/shm
tmpfs                   218.7M         0    218.7M   0% /media/ram
root@beagleboard:~# cd /media/mmcblk0p1
root@beagleboard:/media/mmcblk0p1# ls
MLO         combi       riscos      uImage
boot.scr    ramdisk.gz  u-boot.bin  user.scr
root@beagleboard:/media/mmcblk0p1# du -csh *
24.0K    MLO
2.0K    boot.scr
2.0K    combi
19.0M    ramdisk.gz
4.0M    riscos
206.0K    u-boot.bin
3.0M    uImage
2.0K    user.scr
26.3M    total
root@beagleboard:/media/mmcblk0p1# 

I know this may be silly but is the HDMI signal simply in power down mode? Could this be a side effect of diverting the supervisor prompt (temporarily) to the serial terminal?

Be aware that there is an issue on the XM (revision A) that the ‘DVI power down signal is not operational’.

Clearly there is a work around as the demo image for the beagleboard (the Linux GUI) has overcome this as pressing any key on the keyboard wakes up the monitor if it times out and the HDMI signal switches off.

After all if the !Boot image is seen and executed correctly, RISC OS must think it is displaying a screen with no errors, and it then responds correctly to ‘f12’ giving a ’*’ prompt on the serial terminal.

Back to the Sony monitor MDM-M61 and a little more useful information:

Out of scan range: 6.68kHz / 11 Hz

So… there is a video signal but the clocks are even further out!

Do you need another dump of memory and video settings (or will they just be the same?).

And doing a

*Wimpmode 20

*Wimpmode 0

Any bright ideas?

...follow Chris’s instructions to the letter!

And Jeffrey’s too.

*Wimpmode 20 Any bright ideas?

*loadmodefile <path>.<MDF file> – or is that already taken care of?

Any bright ideas?

Only to list the possible problems, and a little observation. Either the video clock is being generated from too low a frequency (possibly the wrong clock, possible a clock that’s been set to too low a frequency), or the source is being divided down too much before being applied to the PLL, or the clock is subsequently being divided before use.

My observation is that the line and field scan rates seem to be out by different ratios, which I can’t understand. That’s assuming we can believe the accuracy of the scan frequencies as shown by the monitor. I also can’t understand why the frequencies don’t seem to be a nice submultiple of the correct values.

With acknowledgment to Jason Kridner, and assuming: (working with http://www.epanorama.net/faq/vga2rgb/calc.html)

Clock: 96MHz

HFP (horizontal frontporch): 36

HSW (horizontal sync): 201

HBP (backporch): 676

VFP (vertical): 5

VSW: 9

VBP: 44

H freq: 49.56kHz (1024×768 VESA = 48.36kHz)

V freq: 60Hz (matches VESA)

timing_h: 676 << 20 | 36 << 8 | 201 = 0×1A4024C9

timing_v: 44 << 20 | 5 << 8 | 9 = 0×02C00509

OMAP3 beagleboard.org # mw.l 0x48050440 0x00018308
OMAP3 beagleboard.org # mw.l 0x48050464 0x1A4024C9
OMAP3 beagleboard.org # mw.l 0x48050468 0x02C00509
OMAP3 beagleboard.org # mw.l 0x48050470 0x00010002
OMAP3 beagleboard.org # mw.l 0x48050440 0x0001830b 

should produce 49.56 kHz / 60 Hz but it actually produces ‘out of scan 28.5kHz / 34 Hz’ on my monitor, a Sony SDM-M61, so the calculations must be flawed….

I don’t understand this, just hoping it will give some ideas.

In the Beaglebaord documentation I can only see reference to 26MHz and 60MHz clocks, not 96MHz. Where does the 96MHz come from?

...Where does the 96MHz come from?

AM37/DM37x TRM ‘3.5.3 PRCM Clock Manager Functional Description’ (pgs 289-350)?

Edit: Note, this doc is in Revision B (dated August 2010)

DPLL4 generates clocks for the peripherals, supplying five clock sources:
• 96-MHz always-on source clock for the PRM
• 54-MHz to TV DAC
• Display functional clock
• Camera sensor clock
• Emulation trace clock

Edit: red herring – this just accounts for uboot behaviour

Trevor: Remember that there’s also my SD creator program to try. Although admittedly that won’t work if you want to create a card with multiple partitions (i.e. for the Angstrom/RISC OS dual boot).

Do you need another dump of memory and video settings (or will they just be the same?).

They’ll be the same. (Well, they won’t be the same, but they will indicate the same thing – that nothing has gone wrong in the registers that the video driver alters)

Either the video clock is being generated from too low a frequency (possibly the wrong clock, possible a clock that’s been set to too low a frequency), or the source is being divided down too much before being applied to the PLL, or the clock is subsequently being divided before use.

Yes, it’ll be a problem like that. But the trouble is working out exactly where the problem is, since the OMAP clock tree is a complex beast.

I’m currently looking through the *memory dump that I asked Chris for, I’ll let you know if I find anything.

...there’s also my SD creator program to try.

Thanks for the reminder. I don’t have USB on the RiscPC but now I’m overcoming the rev.C4 problems, I ought to be able to use it on that.

...won’t work… with multiple partitions…

That’s OK. I’m not too fussed about that in the short term.

RISC OS uses (or should be using!) the DSI PLL, not DPLL4 (which is what u-boot uses).

Extract from Table 7-19 (in ‘Display Subsystem Integration’, pg 1601):

Clock Signal     Attribute         Module   Frequency                    Comment
DSS2_ALWON_FCLK  Functional clock  DSI PLL  12/13/16.8/19.2/26/38.4 MHz  From PRCM: SYS_CLK

Edit(s): Possibly not relevant either (but I don’t know what I’m looking for the way you guys do): “The DSI PLL is also used to generate the 74.25-MHz frequency used for HDTV applications.” – 7.4.4.1 DSI PLL Controller Overview, pg 1665. Also note ‘Figure 7-139. DSI PLL Programming Sequence’ (pg 1736) which refers to the setting of REG factors… and ‘7.6.3 How to Configure the DSI PLL in Video Mode’ (pg 1774)

Those *memory values look fine (except where you forgot the ‘p’ for 48004e10, causing the command to report the contents of a logical address instead of physical; but that’s OK because if 48004e10 was 0 instead of the correct value of 1 then the video driver would have crashed straight away with a data abort).

However, when checking the *videoregs output against what my beagleboard produces, I’ve spotted one obvious discrepancy that I didn’t spot earlier – on the -XM the DSI_BYPASSACKZ bit of DSI_PLL_STATUS isn’t set, which means that the HSDIVIDER (which feeds the DSI PLL output to DISPC) is using the bypass clock instead of the DSI PLL (and the bypass clock would be the 13MHz system clock – which when divided by two by the DISPC module would produce a 6.5MHz pixel clock, which would match the 6.68KHz line rate your monitor complained about with your 75Hz 800×600 mode)

So now we just have to work out why the HSDIVIDER isn’t using the right clock…