Zortech C++ Tools
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This is version 3.0 of C++ Tools

This file contains any last minute information concerning the V3.0 version
of ZCV. You should read this file before continuing.
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Version : V3.0r1 Release
Date    : June 19, 1991

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CHANGE NOTES
Modified disp_peekbox/ disp_pokebox references for new prototypes.

Modified zEQ::pending to deal with bioskey(1) return value of -1
as a special case (is this a DOS4+ innovation?).

Modified zBitVec to add extra operator= functions to avoid compiler
generated ones.

Modified zMoneyNN to minimise rounding errors on division/ multiplication
by doubles with no fractional part.
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KNOWN PROBLEMS
PharLap does not handle chained interrupts correctly. RTCTEST will fail
unless RTC.CPP is modified to eliminate chaining.  This will then hold
out any pop-up TSR's which use the timer tick.

There appear to be problems with our dos extender and the mouse if some
other interrupt is happening frequently.  In ETEST0 the mouse will
sometimes die during the period before the timer expires.  The timer
uses the clock tick.  A keyboard interrupt seems to start the mouse
stuff working again.
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MAKING LIBRARIES
We have supplied large and small model libraries for MSDOS and OS/2
(not Dos & Windows Edtion) to make additional libraries, move to
the TOOLS\SOURCE subdirectory and type:

For MSDOS use:
MAKEALL <.BAT>         to make all of the libraries
or
MAKE MODEL=L OS=__MSDOS__          to make the large model library alone.

For OS/2 use:
MAKEALL <.CMD>         to make all of the libraries
or
MAKE A=^^^& MODEL=C OS=__OS2__     to make the compact model library alone.

Most prototypes have been changed from int to INT16. This is a define
in tools.hpp. On DOS386 it is defined to short, on MSDOS and OS/2 it
is defined to int.
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MSDOS VERSION
There are some changes from the description in the manual which
are largely to do with maintaining a uniform interface under DOS
and OS/2.

The Text User Interface classes no longer use class zTextMouse.
Instead, all of these classes include EVENT.HPP, and thus pull
in the event queue which now initializes the mouse.

The event queue now also attempts to record the state of the shift
keys for keyboard events. It will not be able to do this if you
have typed ahead, but for deliberate commands - like SHIFT+ESC -
or something of the sort, it should be fine. Test program ETEST0.CPP
has been added.

The event queue now has functions zEQ.hidemouse() and zEQ.showmouse().
These may be used instead of calls to the Zortech library mouse
package, though you can use the direct calls to the mouse package
if you prefer.
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OS/2 VERSION
There are some changes from the description in the manual which
are largely to do with maintaining a uniform interface under DOS
and OS/2.

The Text User Interface classes no longer use class zTextMouse.
Instead, all of these classes include EVENT.HPP, and thus pull
in the event queue which now initializes the mouse.

The event queue now has functions zEQ.hidemouse() and zEQ.showmouse().
These should be used instead of calls to the Zortech library mouse
package, which should NOT be used with the text user interface classes.
Similarly the disp package from the C library should NOT be used with
the event queue or the text user interface classes. Use the facilities
provided by zScreenArea, or if you need to go to a lower level, use the
OS/2 Vio functions etc. For examples see the zScreenArea source code.

The event queue now also records the state of the shift keys for keyboard
events so you can decipher key strokes like SHIFT+ESC etc.

The classes which mess with the interrupt vectors are not supported
at present under OS/2, that is the real time clock class, the critical
error handler class, and the interrupt vector class.
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EOF