OVLSIZE

 The main PCBoard executable file is overlaid.  This means that only a portion
 of the executable is in memory at any given time. How much of the executable
 can be held in memory depends on two factors:  1) How much of it is resident
 (not in the overlay) and 2) How big the overlay buffer is.  You can determine
 how big of an overlay buffer you want to set for each executable using this
 utility.

 A setting of 16 sets up a 64K overlay buffer.  This setting allows PCBoard to
 swap pieces of the executable file in and out of memory keeping up to 64K of
 it in the overlay buffer.

 Syntax

 OVLSIZE [filename] [buffer size]

  [filename] = This is the filename you want to update the overlay
               buffers on.  Enter the location of your PCBOARD.EXE
               or PCBSM.EXE.  If OVLSIZE cannot find the file you
               specify, it will print unable to open file specified.

  [buffer]   = This parameter represents the new buffer size.  See
               Buffer Sizes for a list of valid buffer values.  If
               you do not specify a buffer size, the current overlay
               buffer size will be printed to the screen.

 Buffer Sizes

 The following chart in this section will show you the valid
 buffer sizes that you may select:

 Value  Size    Value   Size    Value   Size    Value   Size
 -----   ----    -----   ----    -----   ----    -----   ----
 1       4K      9       36K     17      68K     25      100K
 2       8K      10      40K     18      72K     26      104K
 3       12K     11      44K     19      76K     27      108K
 4       16K     12      48K     20      80K     28      112K
 5       20K     13      52K     21      84K     29      116K
 6       24K     14      56K     22      88K     30      120K
 7       28K     15      60K     23      92K     31      124K
 8       32K     16      64K     24      96K     32      128K


 A higher value allows more of the executable file to be held in memory.  The
 highest possible value, of course, would simply load the entire executable
 file into memory and would never access the hard disk.  An overlay buffer of
 this size would be wasteful of memory.

 Lower values may hurt performance by causing PCBoard to continually swap
 code in from disk - creating more disk activity than would otherwise be
 necessary.

 You may want to use a smaller value such as 16.  This lets PCBoard pull in
 the code that is running, when it is needed, and leave the rest of the code
 on disk until it is needed.

 Allowing you to pick the buffer size allows you to tune your system to meet
 your memory and performance needs.  If you need more memory, go for a lower
 overlay buffer size.  If you need more performance, go for a higher buffer
 size.

 NOTE:  The minimum value that you should select is 14 for PCBoard to operate
 properly.  If you plan to execute any PPE files, the minimum value you should
 select is 16.