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VIZMARK.NEW
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1990-05-15
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What is new in version 1.61
~~~~~~~~~~~~~~~~~~~~~~~~~~~
To minor bugs of versions 1.50-1.60, one producing a text shift in the first of
a series of windows, and the other a spurious leading zero (and a decimal point
position error) when dividend and divisor were the same, have been fixed. Data
message has been modified and compressed a bit.
What is new in version 1.62
~~~~~~~~~~~~~~~~~~~~~~~~~~~
A bug making some screen writes unreadable when in graphics video mode has been
fixed. A missing grid line in the first ANSI display has been added. The cursor
positioning testing via ANSI sequences has been enhanced. In some DOS versions,
DOS interrupt 29h, which mediates a call to the BIOS teletype service, does not
restore the contents of the base register BX; version 1.62 avoids using BX when
making calls to this interrupt.
What is new in version 1.70
~~~~~~~~~~~~~~~~~~~~~~~~~~~
The code has been optimized using a software timer to select those instructions
providing faster execution time in situ, so as to correct for the time required
to fetch instructions from memory to speed up execution in 8086/8088 computers.
The code has also been realigned so that nearly all program procedures start at
memory addresses that are a multiple of 4, so as to speed up execution in 80286
and, especially, 80386 computers. Elapsed DOS times now represently exclusively
processing via interrupt 21h, function 40h, handle #1 (Standard Output device),
which is the preferred DOS-mediated video output service for DOS 2.0 or higher.
See VIZMARK.DOC for other details.