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1993-10-19
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SCROLLit Advanced Scrollback Buffer October 19, 1993
─────────────────────────────────────────────────────────────────────────
New in SCROLLit 1.8
─────────────────────────────────────────────────────────────────────────
■ Your SCROLLit registration key can now be ordered with a credit card
by calling Public (software) Library at 800-242-4775 (orders only
please). You can also mail credit card orders to PsL at P.O. Box
35705, Houston, TX 77235-5705. For orders placed with PsL, in
addition to the US$17 SCROLLit registration fee, there is a US$6
surcharge to cover PsL's service fee.
■ SCROLLit's compression algorithm has been improved to provide 5-10%
more compression. Without compression, a line of text would take up
160 bytes in the scrollback buffer: 80 character bytes plus 80
color attribute bytes. SCROLLit compresses these lines, usually by
at least 60%, so that more than twice the number of lines of text
will fit in your scrollback buffer. Because of the overhead
involved in setting up the buffer, small buffers (less than 40k)
will not be compressed as much as large buffers.
■ In addition to capturing lines of text that scroll of the top of
the screen, SCROLLit captures the entire screen whenever a BIOS
'clear-screen' request is intercepted (video BIOS function 06h).
The screen is also cleared whenever a program changes video mode,
so SCROLLit will now capture the entire screen whenever the video
mode is changed (video BIOS function 00h). As a result, SCROLLit is
more likely to contain a complete record of your text activity.
■ SCROLLit was inserting two blank lines into the buffer if a blank
screen was cleared. This has been changed so that no lines are
inserted in the buffer when a blank screen is cleared.
■ A conflict has been discovered between SCROLLit and older programs
that use DOS function 00h to terminate. This function was
superseded by function 4Ch with the release of DOS 2.0 in March
1983. Fixed.
─────────────────────────────────────────────────────────────────────────
SCROLLit 1.7
─────────────────────────────────────────────────────────────────────────
■ Users can now select an alternate hotkey instead of the default
Scroll Lock hotkey. The /H command line switch is used to specify a
different hotkey at installation or to change the hotkey after
SCROLLit has already been installed. For example, to install
SCROLLit with a 100k buffer and set 'Alt S' as the hotkey, type:
SCROLLIT 100 /H=81F
Please refer to the documentation for more information.
■ SCROLLit's scrollback buffer can be stored in upper memory (instead
of EMS, XMS or lower conventional memory) by using 'high loading'
software such as DOS 5's LOADHIGH command or QEMM's LOADHI program.
In some situations, the attempt to load SCROLLit's buffer into upper
memory was unsuccessful, causing the buffer to reside in lower
conventional memory. Fixed.
■ A new feature has been added for Desqview users. Some Desqview users
have reported that installing SCROLLit within a Desqview window
slows down the performance of programs operating in other Desqview
windows, despite the fact that SCROLLit releases it's timeslice
during idle keyboard polling. It turns out that any program or TSR
that hooks the timer interrupt will cause this speed degradation in
remaining Desqview windows. Quarterdeck's API programming staff have
confirmed that Desqview will wait one extra tick before giving up
the timeslice to ensure that the timer itself is serviced. The /NT
(for NoTimer) command line switch has been added to SCROLLit, to
allow installation without hooking the timer interrupt (the BIOS
keyboard interrupt is hooked instead). For example, Desqview users
who wish to optimize the performance of their system would install
SCROLLit by typing:
SCROLLIT 100 /NT
Please refer to the documentation for more information.
─────────────────────────────────────────────────────────────────────────
SCROLLit 1.6
─────────────────────────────────────────────────────────────────────────
■ Please note our new mailing address. Don't worry if you have mailed
something to our old address: we will continue to check for mail at
the old address for at least a year, or as long as mail continues to
arrive there.
■ SCROLLit can now be registered online using Compuserve's shareware
registration service ('GO SWREG'). When you register with the
service, the US$17 registration fee (plus a $3 surcharge to cover
Compuserve's service charge) is added to your monthly Compuserve
bill. Your SCROLLit registration key will be sent to you by
Compuserve mail (unless you request postal mail).
■ By default, SCROLLit uses a color scheme of blue and white against a
cyan background. While this combination looks fine on a color
monitor, some users of LCD notebooks report that these color
attributes lack definition when translated into the shades of grey
that these machines use to represent different colors. Two new
command line parameters have been added to allow the user to specify
the color attributes used in color text mode 3 (/AC=) and in
monochrome text mode 7 (/AM=). These commands can be used to set the
color attributes during installation or after SCROLLit has already
been installed. For example, to install SCROLLit with a 100k buffer
and customized color attributes for use during color mode 3, type:
SCROLLit 100 /AC=20,27,2F,07
Please refer to the documentation for more information.
■ The operation of SCROLLit inside a Desqview window has been fine-
tuned. Desqview users should notice smoother scrolling when browsing
through SCROLLit's buffer.
■ The Ctrl-Home bookmark is designed to return you to the same
position within the scrollback buffer as when you last exited
SCROLLit. In some situations, SCROLLit was not saving the correct
location within the scrollback buffer. In these cases, pressing
Ctrl-Home would either return you to an incorrect location within
the buffer, or, with some computers, cause a lockup requiring a
reboot. Fixed.
■ In certain situations (relatively rare), SCROLLit would fail during
installation, issuing an 'unexpected error 31' message and causing a
lockup requiring a reboot. Fixed.
─────────────────────────────────────────────────────────────────────────
SCROLLit 1.5
─────────────────────────────────────────────────────────────────────────
■ Pressing Ctrl-Home allows you to return to the position in the
scrollback buffer when you last exited SCROLLit. This feature is
often referred to as a 'bookmark'. Older versions of SCROLLit were
only updating the buffer position when SCROLLit was exited with the
Esc key. If you exited with the Scroll Lock key, the bookmark was
not being updated. Fixed.
■ Two new command line switches, /- and /+, have been added to allow
SCROLLit's capturing of scrolling lines to be temporarily disabled
and then re-enabled.
■ A new command line switch, /R, has been added to provide more
information on how to register SCROLLit.
■ The /? command line switch will display a list of all command line
switches with a brief description of what they do.
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