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*** Warning *** Do NOT use these kernels on Pentium Pro systems.

[Moderator note: As always these are not officially supported by IBM unless they tell you to use them.

Download from ftp://testcase.boulder.ibm.com/ps/fromibm/os2/

**** Please send any followup to comp.os.os2.bugs on usenet. ****

Also note that files are only on IBM's testcase for 2-3 days, so if you want to try these get them now. Make certain you back up any files replaced and don't try these on a production system. Read any readme file before applying any changes. If your system is working well, and you have no problems addressed by these updates, do yourself a favour and don't mess with this. You have been warned.

The UNI and SMP files are for WSeB/ACP/eCS Pro (SMP kernel) and the W4 files are for post FP15/MCP versions, including eComStation. Only use the SMP kernel on a machine with more then one CPU.]

>From the readme file:

20041103 14.100d
WITHDRAWN

20041105 14.100e
****** WARNING: Do NOT use this version on a Pentium Pro machine.
For the benefit of everyone else, I have temporarily removed a workaround for a P-Pro chip bug. This will improve performance under heavy load by a few percent for all other machines by correctly aligning the IDT entry.

JR20486 More sys3175 during bootup on Pentium 4s (and maybe Opterons?) with >512mb of RAM

- changedd vmco_s to be 8 bytes instead of 5. This will break tools that depended on that length and will use an extra 184kb of resident memory.
However, it greatly speeds up some memory management operations.

20041210 14.100g
20041214 14.100h
20041215 14.100i
WITHDRAWN (kernel causes machines with older CPUs to hang on boot)

20041216 14.100j

20041216 14.100k
****** SEE WARNING UNDER 20041105
** Experimental: Changed realmode transition code again to try to make all CPUs happy with APM and TESTCFG.

JR20486 (again): Even more P4-related changes. Athlon64 likely still not working reliably (or supported).
- os2dump and os2ldr LBA changes in 20041105 backed out
- *Very* small timing hole caused trap 3 in SwitchNPX

20050112 14.100m
****** SEE WARNING UNDER 20041105
PJ30111 Trap 000E in _vmAliasToAlias (only during debugging?)

20050113 14.100n
****** SEE WARNING UNDER 20041105
- IPE _SelFreeGDT invalid selector when freeing a ring 3 GDT selector that is also the highest allocated gsel.

20050129 14.100o
****** SEE WARNING UNDER 20041105
- Ring 3 NPX error could result in trap 000e

Source: OS2VOICE

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