DR DOS and Stacker
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_______________________________________________________________________ STACKER NOTE Stac Electronics Technical Note Subject: DR DOS and Stacker Tech012 - 2/20/92 Page 1 OF 1 _______________________________________________________________________ Stacker is compatible with Digital Research Dos versions 5.0 and 6.0. However, there are some special considerations when using these operating systems. DR DOS 6: 1. DR DOS 6 comes with its own file compression program. This compression program cannot be used if you choose to use Stacker. Using Stacker will give you better speed, better compression, a smaller driver size, and more advanced features than the compression program that comes with DR DOS . 2. Installing DR DOS 6 after Stacker is installed may require a special procedure. See Tech023 for details. DR DOS 5 and 6: Using DR DOS 5 or 6, if you configure Stacker to use EMS for its cache, or if you load the Stacker device driver into upper memory, the following message is displayed by the Stacker device driver when you start your computer: "Note: In DR DOS, loading Stacker high (or using /EMS) may slow disk access. Please see the Stacker README file for help." This condition can be remedied using the /ND parameter on the STACKER.COM device line in Config.sys. Use the /ND parameter if your hard disk controller is NOT a bus-master controller. (If you are unsure of whether your disk controller is a bus-master, it probably isn't.) If you DO use a bus-master disk controller and it does not support virtual DMA, DO NOT use the /ND switch to increase disk performance. If you do not use the /ND parameter and wish to suppress the warning message, place the /NW (no warning) parameter on the Stacker DEVICE statement in the CONFIG.SYS file. DR DOS 5: Under DR DOS 5, the SSWAP option does not operate properly with Stacker versions 1.0-1.11. It recommended that you upgrade to version 1.12 or 2.0 in order to SSWAP the Stacker drives.