FYI, I just upgraded from a Pentium/P54C at 133MHz on a Tyan Titan-III
motherboard to an AMD K6-III CPU at 450Mhz (100MHz bus speed) on a
Tyan S1590S "Trinity 100" AT-form factor motherboard.  Runs really
good!

I previously built a machine with a K6-2 at 350MHz on an FIC VA-503+
motherboard for FreeBSD testing and as the Windoze 98 platform for
Total Annihilation game playing, and was very happy at how that worked
out.  So, when it came time to upgrade the old Pentium, I did the AMD
thing again.

The on-board 256K L2 cache and 100MHz bus really makes this machine
quite spritely.  Even with the crummy old SCSI fast (non wide, non ultra)
disk, there's a very noticable improvement.

At boot:

CPU: AMD-K6(tm) 3D+ Processor (450.92-MHz 586-class CPU)
  Origin = "AuthenticAMD"  Id = 0x591  Stepping=1
  Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
AMD Extended Features=0x808029bf<FPU,VME,DE,PSE,TSC,K6MSR,MCE,CX8,SYSCALL,PGE,M
MX,3DNow!>
Data TLB: 128 entries, 2-way associative
Instruction TLB: 64 entries, 1-way associative
L1 data cache: 32 kbytes, 32 bytes/line, 2 lines/tag, 2-way associative
L1 instruction cache: 32 kbytes, 32 bytes/line, 2 lines/tag, 2-way associative
L2 (on-CPU) cache: 256 kbytes, 32 bytes/line, 2 lines/tag, 4-way associative
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Write Allocate Enable Limit: 128M bytes
Write Allocate 15-16M bytes: Enable

The Tyan has a 1MB cache (now L3) of it's own.  This combination is
recommended (by me, at least).  After doing computer surgery to swap
motherboards it came right up with no problems at all.  I was surprised.

I've submitted a PR with a patch to add support for the L2 cache display
above for -CURRENT.

louie




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