PTSCACHE Driver

Purpose:  Driver PTSCACHE provides hard disk caching (accelerates
          read/write operations due to temporary storing of data in XMS
          memory.

Syntax:   DEVICE = [drive:][path]PTSCACHE.SYS [<mem_parms>]
                   [/C[<cache_parms>]] [/H] [/Q[Q]] [/P] [/D]

Description:
<mem_parms>    - parameters for memory size configuration:
     <buf_size>    -  full XMS buffer size in kilobytes.
                      The minimum value is 128, the maximum is 14000.
                      By default all accessable XMS memory is occupied.
     <K:keep_size> -  buffer size, which the driver tries to reserve
                      for itself. Default value is 1/4 of full size.
     <W:win_size>  -  memory size that will be released for using in
                      WINDOWS. When running WINDOWS the lack of XMS
                      memory can occur. To avoid it set this parameter
                      equal to 600.

<cache_params> - parameters for cache configuration:
   U:<block_sec>   -  number of sectors in one cache block (1-8).
                      Default value is 8. Less number is recomended
                      if the buffer size is  less than 500 KBytes;
   T:<delay_ticks> -  write delay period in timer ticks (1/18 sec).
                      Default delay is 18 (1 second);
   B               -  sets write-back mode. In this case writing is
                      performed in background mode;
   I               -  in case of write back mode begins writing
                      immediately but in background mode;
   A               -  sets read-ahead mode. By default, read-ahead is ON;
   F               -  write stategy is set by FIFO order (First In -
                      First Out). By default, sectors are sorted in
                      ascending order before writing.
   L               -  write strategy is set by LRU order (Least Recently
                      Used).

/H             - instruction, to use HMA for table storing.

/Q             - instruction, not to display installation parameters (quiet
                 mode).

/QQ           -  like /Q, messages about not fatal errors are also
                 suppressed.


PTSCACHE is managed by PTSCTL program.