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VisiCorp Visi On
Visi On was the first full GUI for the IBM PC. First demonstrated by
VisiCorp at Fall Comdex 1982 and released at the end of 1983, just prior
to the Apple Macintosh, it pre-dated the release of Microsoft Windows by
In many ways, Visi On was very advanced for its time. It featured graphical
overlapping windowing, common user interface controls, a custom filing
system, a portable virtual machine, an integrated office suite, and supported
third party application development.
In part, the demo and release of Visi On motivated a massive response
from Microsoft, promoting their still vaporware Windows product. Between
that, Apple fanfare, and both business and technical issues on the part
of VisiCorp, Visi On failed to gain popularity and was buried in obscurity.
It was forgotten by everyone, and seemed like the last copy had dropped
off of the face of the earth....
Until I got my hands on a copy of VisiCorp Visi On!
I finally have Transcopy images that can reproduce workable install
disks, with its ugly copy protection in place! Writing these disk images
requires a Central Point Deluxe Option Board, although the SuperCard Pro
or Kryoflux may eventually be able to write them. Transcopy images are
also supported by the PCE emulator.
For the sake of historic software preservation please click the links
archives with Transcopy disk images! Transcopy images are writable
with a Central Point Deluxe Option Board and usable with the PCE emulator.
Visi On Applications Manager
Visi On Calc
Visi On Graph
Visi On Word
preconfigured emulator - PCE pre-installed and ready to run with an
unmodified copy protected installation.
An unprotected preconfigured zip file -
A zip of the installed program files and applications with an unprotect
applied so you do not need a keydisk, and executable hacked for ATs. Just
unzip these to a FAT12 partition on a PC or PC emulator that uses a Mouse
Systems compatible mouse, and you are all set!
A Bootable 1.4 meg disk image - of Visi
On with the tutorial and the word processor (requires Mouse Systems/PC
Mouse compatible serial mouse). Includes executable hacked for ATs.
old unprotection notes and other information sources.
CHD Hard drive image for use with MESS.
- Includes the unprotect an extra hack to work with the serial port in
MESS. Note that as of MESS 0.131 the CHD format changed, so you must use
the CHDMAN utility to update the image. Use the "PC (CGA)" emulation and
be sure to select the "Mouse Systems" mouse type.
mess1001_w95.zip - A custom version of
MESS that is known to work right with the above image. Also modified to
run under Windows 95.
IBM5150.ZIP - ROM images you may need to to run
Please note these important hardware requirements:
A Mouse Systems PCMouse or compatible connected to COM1 (not Microsoft
A PC/XT for 100% compatibility, NOT an AT (My 1.44mb boot disk contains
an executable hacked for ATs)
A drive with a FAT12 file system (FAT12 file systems are 15 MEGS or less
in size) and at least 1.6 megs free. Not FAT16 or FAT32.
What is VisiCorp Visi On?
VisiCorp Visi On was the first full featured desktop GUI for the IBM
PC. Legend has it Bill Gates saw a demo of this running at the 1982 comdex
running on an IBM PC. He freaked out because Microsoft didn't have anything
like this yet, ran back to Microsoft Headquarters, and had them start work
on what became Windows.
The Visi On 1.0 files, interestingly, are dated December of 1983, the
same month the "Microsoft Windows" article appeared in Byte Magazine. As
we know Windows 1.0 was not released until 1985. If this was an attempt
to keep people away from Visi On, it worked. In august 1984 VisiCorp sold
Visi On to Control Data Corp, where it was apparently never heard from
The Visi On product was apparently not intended for the home user. It
was designed and priced for high end corporate workstations. The hardware
it required was quite a bit for 1983. It required a minimum of 512k of
ram and a hard drive (5 megs of space).
A very interesting feature of Visi On is the way it was designed. It
was designed to be portable to other OSes such as CP/M or Unix, or to other
CPUs besides the 8086. It did this by providing a kind of non machine specific
"virtual machine" (called the Visi Machine) that all applications were
written for. Only the very core of Visi On (called the Visi Host) was machine
Applications were developed in "Visi C", a fairly restricted subset
of C designed for maximum portability. The development environment was
Unix based and included a non-graphical version of the Visi-Host that let
portions of Visi-On applications be run and tested on Unix.
Sounds kind of like Java or .Net doesn't it?
Unfortunately, aside from the incomplete Visi Host included with the
development software, Visi On was never ported to any other platform besides
IBM PC compatibles running MS-DOS.
Another unique aspect of Visi On was that outside developers were encouraged
to write applications for Visi On. At the time many companies tried to
keep tight control on there development environments, but anyone with enough
money and a Unix system could purchase a copy of the Visi On development
The Visi On GUI:
Provided a consistent interface between all applications.
Unlike the Xerox Star or the Apple Lisa which existed at the time, Visi
On did not use icons.
Used the IBM CGA 640*200 monochrome graphics mode.
Although graphical, seems to be very text oriented.
Can work with multiple applications at the same time.
Visi On applications can share data between each other.
Built in help.
Built in installer.
The Visi On Boot screen. With modern mice calibration is not necessary,
all that is needed here is to just move the mouse. Original Mouse Systems
mice had to be moved in circles several times to "calibrate" the sensitivity
before they could be used.
A few technical notes about getting Visi On to run:
To properly run VisiCorp Visi On you must have a PC/XT with at least
512k of ram, MS-DOS 2.00 (or higher), A hard drive (or other large disk)
formatted with the FAT12 file system, and the Visi On model S1, model M1
or other Mouse Systems compatible mouse.
Visi On will not run properly on a PC/AT (286) or later because Visi
On revectors several software interrupts that are used by IRQ 8-15 on these
machines. I disabled the revectoring and made the "VISIONAT.EXE" version
of the executable that will run on later machines, however these interrupts
are required by applications such as Visi On Graph. As a result Graph can
not run at all on newer machines but at least now the rest of the
software can more or less run.
Visi On requires a Mouse System compatible mouse. Mouse Systems mice
were the first mice available for IBM PC. When Microsoft introduced their
mouse, they used their own communications protocol. At the end of 1983,
Microsoft mice were still fairly new and uncommon. The documentation refers
to a "Visi On" mouse, which is just a VisiCorp OEM rebranded Mouse Systems
The Visi On software has its own built in mouse driver, and can not
make use of DOS mouse drivers. However, in some cases Visi On may fail
to properly initialize clone serial ports or mice, and loading the Mouse
Systems DOS driver first may help work around this problem.
Microsoft serial mice, PS/2 mice, and USB mice are not Mouse Systems
compatible. Some generic 3-button serial mice from the 1990s include Mouse
Systems (also called PC Mouse) compatibility. Some have a switch on the
bottom that you can just flip to switch between Microsoft and Mouse System
protocols. Others can be placed in Mouse Systems mode by holding down the
first mouse button when the computer is powered on and/or during mouse
initialization. Some other serial mice (especially cheap ones) used the
same hardware but left out the switch, these can be set to Mouse Systems
compatibility mode by connecting pin 3 to pin 8 of the IC chip if you know
what your are doing. Some are also switchable using software but the methods
for doing so can vary.
Also, Visi On bypasses the DOS file system for some operations. As such
it requires a FAT12 partition. This was the only type available under DOS
2.x when Visi On was released.
The original disks are heavily copy protected, and can not be duplicated
without special hardware. At startup Visi On requires that you have the
key disk in drive A:. The zip archives above include a partial unprotect
that removes this requirement.
This is the Visi On Application Manager. The Application Manager includes
the GUI and the core of the Visi On system. Without the Application Manager
you can not run the other Visi On applications.
The entire Visi On suite consists of:
Visi On Application Manager (the GUI)
Visi On Accessories (bundled with Application Manager)
Visi On Graph (Graphing program)
Visi On Word (Word processing program)
Visi On Calc (Spreadsheet program)
When Visi On starts, it displays the Services window. This windows lists
all installed programs, and provides facilities for installing and removing
software as well as configuring printers and managing drives. This window
also has the "Exit" option to exit Visi On, however this is hidden by the
default size of this window. To use it you must either resize the window,
scroll the menu with the right mouse button, or use the keyboard to activate
When you first Install the Visi On Application Manager the only installed
program is the "Archives" utility. All others are installed separately.
In Visi On there are no windowing controls on the windows. Instead
windowing functions are controlled by the menu at the bottom of the screen.
HELP - Launches the built in help program and displays the help for
whatever object is selected.
CLOSE - Minimizes the size of a window and places it in the upper right
of the screen.
OPEN - Restores a "closed" window.
FULL - Makes a window take up the entire screen.
FRAME - Resizes the selected window.
OPTIONS - Displays any preferences or options for the program.
TRANSFER - Used to transfer information between applications.
STOP - Cancels a menu action if it has not been completed.
This example shows a window being resized. This is done by clicking
"Frame" then selecting the window to resize, selecting the upper left corner
of the new window location, then selecting the lower right corner.
There are no scroll bars in Visi On. Instead, text is dragged using
the right mouse button. Scrolling on modern systems can be too fast, but
on slower systems you may get a nice "smooth scrolling" effect.
Interestingly long menus like the one on the service windows can be
scrolled horizontally using the right mouse button.
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