AMD K6, K6-2, K6-III OS/2 driver

AMD K6, K6-2, K6-III OS/2 driver v1.11 ======================================= This driver is designed to enable the AMD K6-xx cpu's "write-allocate" feature according to the amount of main memory installed. Usually this should be done already by the mainboard's bios. But if the K6-xx is used as an upgrade solution in old Pentium boards, the bios might not be aware of this performance enhancement feature. There is an additional feature present in all K6-III and certain K6-2 cpus, called "write-combine". This may speed-up access to the memory buffer of your pci or agp graphics card. Normally this feature should be enabled by the video driver when decting a suitable cpu... K6.SYS does not stay resident after initial load. So it does not occupy any system resources, except for a few milliseconds delay at boot-up. Installation ------------ Copy K6.SYS to the \OS2\BOOT directory of your OS/2 Warp3 or Warp4 system. Add the following statement to CONFIG.SYS: BASEDEV=K6.SYS CONFIG.SYS command line options ------------------------------- /V show screen output /w???????? enable first write-combine region using given hex value /W???????? enable second write-combine region using given hex value how to calculate the write-combine value ---------------------------------------- 1.Find out the physical address and size of your graphic card's memory buffer. There are some tools available to do this, like SCANPCI.EXE 2.Read the K6-2 or K6-III data sheet available as .PDF from AMD and calculate the appropriate value. 3.If you don't have or don't understand the data sheet, you may try this: BASEDEV=K6.SYS /V /w??01FE02 where ?? is the leading two hex digits of the video memory's physical address. revision history ---------------- v1.0 Jun-20-1999 initial version: support for write allocate feature v1.1 Jul-09-1999 added support for write combine feature v1.11 Jul-26-1999 fixed: memory size rounding Robert Lalla, Loerrach, Germany rlalla@stepnet.de !! Warning: The use of K6.SYS is at your own risk !!