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                                   VIZMARK
                                   -------
                   Copyright (c) 1989-1991 FM de Monasterio 
                             All rights reserved


Version 2.23

Decreased direct-writing testing overhead to further reduce variability in 486
machines.  Fixed error in null display for zero measurements, and error in the
label type of a procedure.

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Version 2.22

Decreased testing overhead and timing jitter to reduce variability in fast 486
machines (33 Mhz).  Fixed error in the positioning of the date/time run stamp.

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Version 2.21

Fixed problem triggered by bug in some old 8088's BIOS (the register SI is not
preserved during video BIOS interrupt 10h). Changed switches to a more logical
format: /T (text) tests BIOS text functions only, and /A (ANSI) tests standard
ANSI escape sequences only.

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Version 2.20

Modified code to increase timing performance and to decrease data variability,
and to allow execution in old PCs.

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Version 2.10

Added support for the extended VGA text modes (132x25 and 132x43) for PARADISE
VGA cards.  The code for some of the tests was tightened with a software timer
to speed up performance.

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Version 2.00

Separated the pathway for interrupt 21h, function 40h, handle #1 (Standard Out-
put device) from that for interrupt 29h, the undocumented DOS' backdoor to the
BIOS teletype service, to better assess DOS and CON video output.

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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.

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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.

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Version 1.61

Two minor bugs of version 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.

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