BUG REPORTS
    ~~~~~~~~~~~
   When using version 1.50 thru 1.60, a bug causes the text line on the bottom
    row of the first window scroll to shift left by 1 place. (It has been fixed
    in version 1.61).

   When using version 1.52 thru 1.60, an incomplete sign test yields an output 
    of 0.100 instead of 1.00, when the divisor and dividiend are the same.  (It
    has been fixed in version 1.61).

   Version 1.61 displayed unreadable characters in graphic mode for writes via
    interrupt 10h, functions 9h and Ah.

   Version 2.00 could not handle VGA extended text modes (132 columns by 25 or
    43 rows). Version 2.10 accepts the Paradise extended VGA video modes 54-55h
    (color text) and 56-57h (monochrome text).

   Versions prior to 2.21 did not work well in some old 8088 machines in which
    the BIOS video interrupt 10h did not preserve the contents of register SI.

   Versions prior to 2.23 failed to display a zero result when the timings was
    less than 0.01 seconds. Corrected a stack error produced by erroneous label
    type of a procedure (2.22 only).

                                 ----------------

   UPGRADES & HISTORY
   ~~~~~~~~~~~~~~~~~~
   1.00  -  Not circulated. Bug city in 32-bit floating, no overflow division.
   1.10  -  Not circulated. Beta testing of 086 version. DDT
   1.20  -  Not circulated. Beta testing of 086 and 286 version. DDT
   1.30  -  Not circulated. Beta testing of 286 version. Queue timings changed
   1.40  -  Not circulated. Used for optimizing VIZ.COM versions.
   1.50  -  Not circulated. Used for optimizing VIZ.COM versions.
   1.60  -  First release of 086 version. Brief doc added for DOS-line help.
   1.61  -  Fixed two bugs, one that affected the display of the quotient when
            divisor and dividend where the same (ja insted of jae), the other
            producing a lateral shift of bottom row first scrolled window.
   1.62  -  Modified null graphic mode attribute for 10h/9h and 10h/Ah.
   1.70  -  Software timer optimizations and realignments of code.
   1.80  -  Software timer optimizations and realignments of code.
   1.90  -  Software timer optimizations and realignments of code.
   2.00  -  Completed modifications in separating int-21h/40h and int-29h data
            to assess separately DOS video out and CON video out.
   2.10  -  Added extended VGA text mode support. Tightened the code for faster
            performance.
   2.20  -  Timer readings are made directly from the BIOS registers 6C-6Eh
            instead of via int 1Ah (not available in some early PCs). Timings
            now wait for a timer tick to occur (every 55 ms) before starting,
            in order to decrease variability.  Additional code tightening and
            realignment.
   2.21  -  Changed code to preserve SI before interrupt-10h calls.
   2.22  -  Modified code for less overheard and jitter.
   2.23  -  Further overhead reduction of code. Corrected error in the timing
            display routine for t < 0.01. Corrected far label error in a near
            procedure introduced in 2.22.