QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Eliminating delays in the QNX Loaders |
| Ref. No. |
QNX.000009534 |
| Category(ies) |
Utilities, Filesystem, Configuration |
| Issue |
Instructions on how to eliminate delays in the QNX Loaders
========================================================
The QNX Loader installs with a Primary and Secondary Loader. The Primary Loader builds in a 2 second delay, so that the operator can choose which partition to boot from. The secondary Loader builds in a 2 second delay so that the operater can choose the alternate boot.
The Primary Loader is always found on /dev/hd0, the Secondary Loader is always found on the boot partition, in this case, /dev/hd0t78.
To effectively eliminate the loader's delay, use the spatch utility on the required partitions. See examples below.
|
| Solution |
Primary Partition:
==================
a> spatch /dev/hd0
Edit Next Prev Home Lastblk Goto Find Continue Save Addr Display Mark Quit
000001:000: FA 33 C0 8E D0 BC 00 7C 8B F4 8E C0 8E D8 FB FC .3.....|........
000001:010: BF 00 06 B9 00 01 F2 A5 EA 1D 06 00 00 BE BE 07 ................
000001:020: B3 04 80 7C 00 80 74 0F 80 7C 00 00 75 1E 83 C6 ...|..t..|..u...
000001:030: 10 FE CB 75 ED CD 18 8B 54 00 8B 4C 02 8B EE 83 ...u....T..L....
000001:040: C6 10 FE CB 74 2E 80 7C 00 00 74 F3 BE 18 07 E8 ....t..|..t.....
000001:050: 02 00 EB FE 51 32 ED AC 8A C8 AC E8 04 00 E2 FA ....Q2..........
000001:060: 59 C3 50 53 51 56 55 BB 07 00 B4 0E CD 10 5D 5E Y.PSQVU.......]^
000001:070: 59 5B 58 C3 BE EE 07 2B F5 D1 EE D1 EE D1 EE D1 Y[X....+........
000001:080: EE B8 31 00 03 C6 A2 84 07 BE 68 07 E8 C5 FF B9 ..1.......h.....
000001:090: 24 00 B4 01 55 51 CD 16 59 5D 75 17 06 BA 40 00 $...UQ..Y]u...@.
^^
b> Find the above hex signature.
c> Use the edit menu item to edit the above line. Change the
24 to 01
000001:0a0: 8E C2 26 8B 16 6C 00 26 3B 16 6C 00 74 F9 07 E2 ..&..l.&;.l.t...
000001:0b0: E1 EB 20 B4 00 CD 16 3C 31 72 18 3C 34 77 14 E8 .. ....<1r.<4w..
000001:0c0: A0 FF 2C 31 B4 00 D1 E0 D1 E0 D1 E0 D1 E0 BD EE ..,1............
000001:0d0: 07 2B E8 B0 0D E8 8A FF B0 0A E8 85 FF BF 05 00 .+..............
000001:0e0: 8B F5 8B 54 00 B2 80 8B 4C 02 BB 00 7C B8 01 02 ...T....L...|...
000001:0f0: 57 CD 13 5F 73 0D 33 C0 CD 13 4F 75 ED BE 30 07 W.._s.3...Ou..0.
BLOCK: /dev/hd0
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Secondary Partition:
====================
a> spatch /dev/hd0t78
Edit Next Prev Home Lastblk Goto Find Continue Save Addr Display Mark Quit
000001:000: EB 4A 90 48 51 4E 58 34 46 53 20 00 02 01 EF FF .J.HQNX4FS .....
000001:010: 01 40 00 00 00 F8 10 00 3F 00 40 00 C1 36 05 00 .@......?.@..6..
000001:020: C0 36 06 00 80 00 29 FA 7D 47 34 50 72 65 73 73 .6....).}G4Press
000001:030: 20 45 73 63 20 66 6F 72 20 61 6C 74 65 72 6E 61 Esc for alterna
000001:040: 74 65 20 4F 53 00 00 18 3F 00 00 00 E8 00 00 CD te OS...?.......
000001:050: 12 83 E8 04 C1 E0 06 0E 1F 5E 83 EE 4F 8E C0 31 .........^..O..1
000001:060: FF B9 00 01 FA F3 A5 FB 06 68 6D 00 CB 0E 1F 0E .........hm.....
000001:070: 17 BC 00 08 BE 2B 00 AC 08 C0 74 05 E8 75 01 EB .....+....t..u..
000001:080: F6 A1 1A 00 F6 26 18 00 A3 27 00 B8 02 00 99 BF .....&...'......
000001:090: 01 00 BB 00 02 E8 C0 00 8E D9 B9 24 00 B8 00 01 ...........$....
^^
b> Find the above hex signature.
c> Use the edit menu item to edit the above line. Change the
24 to 01
000001:0a0: CD 16 75 0C 8B 16 6C 04 3B 16 6C 04 74 FA E2 ED ..u...l.;.l.t...
000001:0b0: 0E 1F BE 80 02 3C 1B 75 0E 80 0E 03 00 20 83 7C .....<.u..... .|
000001:0c0: 70 00 74 03 83 C6 40 8B 4C 30 8B 44 14 8B 54 16 p.t...@.L0.D..T.
000001:0d0: BB 00 04 E8 82 00 8B 2E 0A 04 89 2E 29 00 8B 44 ............)..D
000001:0e0: 1C 8B 54 1E A3 00 04 89 16 02 04 C6 06 08 04 01 ..T.............
000001:0f0: 83 C6 14 EB 1E 83 C6 08 FE 0E 08 04 75 15 A1 00 ............u...
BLOCK: /dev/hd0t78
-----------------------------------------------------------------------------
Note: after making the above changes, it is still possible to chose the alternate boot, or a different boot partition - you just need to have the appropriate keys pressed before the boot loader messages come up on the screen. |
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