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- TM
- Shareware PC-Kwik Disk Accelerator
- Program Copyright 1986, Multisoft Corporation
-
- INTRODUCTION
-
- The main benefit of personal computers has always been
- increased productivity. And yet, as we become familiar with
- the advantages of personal computers we begin to notice that we
- spend an increasing amount of time waiting for the computer to
- finish its task. This is partly due to the natural human
- tendency to always want more. But, there is a more objective
- reason as well. Usually, when we begin an activity on a
- computer, we begin small -- a small document, a small
- spreadsheet, a small database, or a few weeks of accounting
- information. Inevitably the data grows, resulting in slower
- responses from the computer, especially when disk access is
- involved.
-
- Fortunately, there is a way to increase the performance of
- applications that use larger amounts of information. The
- technique is called disk caching. Put simply, a disk cache is
- a collection of copies of recently used disk sectors. By
- keeping a copy of recently used disk sectors in extra RAM
- memory, a disk cache can reduce the number of times the
- application actually accesses the disk. This, in turn, can
- dramatically speed up the performance of the application.
-
- The Shareware PC-Kwik program increases the performance of
- diskette and hard disk access by setting up a disk cache. In
- other words, copies of frequently accessed portions of your
- disks are kept in memory. Even though this results in a
- substantial decrease in transfers from your disks and a
- corresponding increase in application performance, the disks
- themselves are constantly being kept up to date. This means
- you receive a performance boost similar to a RAM disk without
- the complexity and the risk of loss of data associated with a
- separate "virtual" drive.
-
- The Shareware PC-Kwik program is designed to work on the IBM
- PC, XT, AT, and PCjr as well as lap-tops, PS/2s, and
- AT-compatible 386 systems. It has been successfully tested
- with IBM DOS Version 2.0 through 3.3. You should notice an
- improvement in the performance in a wide variety of
- applications. In particular, applications that re-read the
- same data should run more quickly. Likewise, if you switch
- back and forth between applications, you should find that
- loading times improve.
-
- To invoke the Shareware PC-Kwik program, simply type SHAREPCK
- followed by an enter key. A series of information screens will
- be displayed. You will be requested to press a key to continue
- after each screen has been displayed. After the program has
- been installed you will receive the DOS prompt again. To
- obtain measurements after running your applications, simply
- re-invoke the program.
-
- The program should dramatically improve the responsiveness of
- your system. The performance gain will be largest when you are
- using programs that frequently access the disk. Programs that
- spend less time accessing the disk such as spreadsheets will
- receive little or no benefit. On the other hand, database
- programs, accounting systems, and similar applications may
- receive a performance increase of a factor of two or more.
- Because of the way it keeps track of disk transfers, the longer
- you use Shareware PC-Kwik in any one session, the greater
- benefit you should receive.
-
- Following are some useful facts about Shareware PC-Kwik:
-
- (1) All reads are cached, not just single-sector reads. This
- means the cache can provide its performance gain regardless
- of how your applications happen to access the disk.
-
- (2) All writes are cached. This means that a copy of data
- written to disk by one phase an application program is
- saved in memory so that later requests for the data can be
- serviced directly from the cache.
-
- (3) All write requests are written through to the disk
- immediately. This means that your disk are constantly kept
- up to date. This eliminates any special concerns about
- power failure.
-
- (4) Diskette changes are automatically detected. This means
- that you can change diskettes whenever you normally would.
- Data from the diskette you have removed will automatically
- be purged from the cache. There is one exception to this
- rule: if you have only one diskette drive, do not use the
- DOS DISKCOPY command to copy a diskette without first
- rebooting DOS without Shareware PC-Kwik.
-
- (5) The program automatically allocates memory for itself,
- leaving 360K bytes for your applications. As a practical
- matter, this means that you will need at least 512K bytes
- to use Shareware PC-Kwik. Applications which will run on a
- 384K system will have enough room to run after Shareware
- PC-Kwik is loaded. If you have applications which require
- more memory, see the information about the other versions
- of PC-Kwik under Upgrades below.
-
-
- WARNING ABOUT LARGE DISK DRIVES
-
- First, the bottom line: We do NOT recommend that Shareware
- PC-Kwik be used with drives which use a physical sector size
- other than the standard 512 bytes.
-
- Now, some background: DOS was designed with a limit that each
- disk drive be no larger than 65,536 512-byte sectors (about 32
- million bytes). The BIOS support for disk transfers was
- designed with similar but less severe limitations. When a
- driver is written to support a drive with more than 32 million
- bytes, various techniques are used to get around the DOS and/or
- BIOS size limitations. One technique is to set up the drive
- with a logical (DOS-level) sector size larger than the 512
- bytes. Another technique that may be used is to partition the
- drive into multiple "logical drives." Shareware PC-Kwik was
- designed to support both of these techniques.
-
- A third technique for supporting large disks involves formatting
- them with a physical (BIOS-level) sector size larger than 512
- bytes. Shareware PC-Kwik should not be used with such drives.
- If you are not sure whether your disk drives use a physical
- sector size greater other than 512 bytes you should check with
- your dealer or vendor before using the Shareware PC-Kwik
- program.
-
-
- DISCLAIMER
-
- This program is provided "as is" with no warranties whatsoever,
- either expressed or implied, including without limitation,
- warranties of merchantability or fitness for a particular
- purpose. The entire risk as to the quality and performance of
- the program is with you. Should this program be defective, you
- assume the entire cost of all necessary servicing, repair or
- correction.
-
-
-
-
-
- SHAREWARE POLICY
-
- You have probably obtained this copy of the program free of
- charge or for the cost of the diskette and duplication.
-
- We encourage you to make copies of the program and the files
- associated with it for friends and co-workers. If you find this
- program useful and wish to support the concept of Shareware, we
- hope you will become a registered user. The cost is low and
- the benefits are real. Registered users of the PC-Kwik
- product:
-
- (1) receive a copy of the latest Shareware version.
-
- (2) receive printed documentation.
-
- (3) receive notification of future updates.
-
- (4) become entitled to telephone support.
-
- (5) support the concept of Shareware products.
-
-
- UPGRADES AVAILABLE
-
- Instead of registering the Shareware version, you may want to
- order one of three commercial versions of PC-Kwik. All three
- versions:
-
- (1) allow you to specify the cache size and otherwise tune
- the product to your hardware and software environment.
-
- (2) allow you to install the software from a batch file.
-
- (3) allow you to un-install the software and re-claim the
- memory it uses without rebooting.
-
- (4) provide a greater performance boost.
-
- (5) do not display promotional screens when they are
- installed.
-
- Personal PC-Kwik allows you to set up the cache in conventional
- memory (the first 640K). Standard PC-Kwik adds the choice of
- placing the cache in Lotus/Intel/Microsoft (or AST) expanded
- memory or AT extended memory. Super PC-Kwik adds a unique
- feature called advanced support of writes. This feature means
- that applications which write as well as read can receive
- double the performance boost provided by other cache products.
-
- Here's a table showing the differences between Personal PC-
- Kwik, Standard PC-Kwik, and Super PC-Kwik:
-
- Version Memory Supported Advanced Price
- 640K Expanded Extended Writes
-
- Personal Yes No No No $39.95
- Standard Yes Yes Yes No $49.95
- Super Yes Yes Yes Yes $79.95
-
-
- ORDERING INFORMATION
-
- To become a registered user of the Shareware version, to obtain
- additional information, or to order one of the commercial
- versions of PC-Kwik, contact:
-
- Multisoft Corporation
- 18220 S.W. Monte Verdi Blvd
- Beaverton, OR 97007
- (503) 642-7108
-
- As of May 16, 1987, prices were as follows:
-
- Shareware PC-Kwik registration fee..........$19.95
-
- Personal PC-Kwik (including registration)...$39.95
-
- Standard PC-Kwik (including registration)...$49.95
-
- Super PC-Kwik (including registration)......$79.95
-
- Visa and MasterCard are accepted on telephone orders. If you
- are not satisfied with any of the above products you may return
- it within 30-days and receive a full refund of the price paid.
-
-
- DISTRIBUTION POLICY
-
- Following is some information for personal computer clubs and
- bulletin board operators:
-
- Multisoft Corporation hereby grants you permission to distrib
- ute copies of this program provided that:
-
- (1) You either
-
- (a) make the program available free of charge, or
-
- (b) charge only for media, duplication, and/or
- distribution, and you identify your charges as
- such.
-
- (2) You make the documentation files associated with it
- available on the same diskette or in the same download
- area or equivalent.
-
- (3) You make no changes to the program or its
- documentation.
-
- If you have any questions about our distribution policy please
- contact us at:
-
- Multisoft Corporation
- 18220 S.W. Monte Verdi Blvd
- Beaverton, OR 97007
- (503) 642-7108