patch-2.2.0-pre2 linux/Documentation/Configure.help
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- Lines: 66
- Date:
Wed Dec 30 14:50:00 1998
- Orig file:
v2.2.0-pre1/linux/Documentation/Configure.help
- Orig date:
Mon Dec 28 15:00:51 1998
diff -u --recursive --new-file v2.2.0-pre1/linux/Documentation/Configure.help linux/Documentation/Configure.help
@@ -91,6 +91,9 @@
single-CPU machines. On a single-CPU machine, a non-SMP kernel
will run faster than an SMP kernel.
+ i486 based SMP boards don't boot CONFIG_M586/M686 kernels. CONFIG_M686
+ SMP kernels might not work on all Pentium based boards.
+
People using multiprocessor machines should also say Y to "Enhanced
Real Time Clock Support", below. The "Advanced Power Management"
code will be disabled in an SMP kernel.
@@ -1557,23 +1560,23 @@
This is the processor type of your CPU. This information is used for
optimizing purposes. In order to compile a kernel that can run on
all x86 CPU types (albeit not optimally fast), you can specify
- "386" here. If you specify one of "486" or "Pentium" or "PPro",
- then the kernel will run on all x86 architectures except on 386.
+ "386" here.
+
+ If you specify one of "486" or "Pentium" or "PPro", then the kernel
+ will not necessarily run on earlier architectures (ie a Pentium
+ optimized kernel will run on a PPro, but not necessarily on a i486).
Here are the settings recommended for greatest speed:
- "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX and
Cyrix/TI 486DLC/DLC2. Only "386" kernels will run on a 386 class
machine.
- "486" for the AMD/Cyrix/IBM/Intel DX4 or 486DX/DX2/SL/SX/SX2,
- AMD/Cyrix 5x86, NexGen Nx586 and UMC U5D or U5S
- - "Pentium" for the AMD K5, K6 and K6-3D, Cyrix MediaGX,
- Cyrix/IBM/National Semiconductor 6x86 and GXm, IDT Centaur
- WinChip C6, and Intel Pentium/Pentium MMX
+ AMD/Cyrix 5x86, NexGen Nx586 and UMC U5D or U5S.
+ - "586" for generic Pentium CPU's, possibly lacking the TSC register.
+ - "Pentium" for the Intel Pentium/Pentium MMX, AMD K5, K6 and K6-3D.
+ This option will assume that you have a time stamp counter.
- "PPro" for the Cyrix/IBM/National Semiconductor 6x86MX, MII and
- Intel Pentium II/Pentium Pro
-
- In rare cases, it can make sense to specify "Pentium" even if
- running on a 486: the kernel will be smaller but slower.
+ Intel Pentium II/Pentium Pro.
If you don't know what to do, choose "386".
@@ -3776,14 +3779,19 @@
given SCSI device. Go with the default unless you know what you're
doing. Minimum is 2 and maximum is 8.
-Future Domain 16xx SCSI/AHA 2920 support
+Future Domain 16xx SCSI/AHA-2920A support
CONFIG_SCSI_FUTURE_DOMAIN
This is support for Future Domain's 16-bit SCSI host adapters
(TMC-1660/1680, TMC-1650/1670, TMC-3260, TMC-1610M/MER/MEX) and
other adapters based on the Future Domain chipsets (Quantum
- ISA-200S, ISA-250MG; Adaptec AHA-2920; and at least one IBM board).
+ ISA-200S, ISA-250MG; Adaptec AHA-2920A; and at least one IBM board).
It is explained in section 3.7 of the SCSI-HOWTO, available via FTP
(user: anonymous) at ftp://metalab.unc.edu/pub/Linux/docs/HOWTO.
+
+ NOTE: Newer Adaptec AHA-2920C boards use the Adaptec AIC-7850 chip and
+ should use the aic7xxx driver (CONFIG_SCSI_AIC7XXX). The Future Domain
+ driver works with the older Adaptec AHA-2920A boards with a Future Domain
+ chip on them.
This driver is also available as a module ( = code which can be
inserted in and removed from the running kernel whenever you want).
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