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- ID:VG Discussion of DESQview Video Modes
-
- 1) Available font sizes: 25, 30, 50, 60
-
- a) Text fonts: 25, 50
-
- b) Graphics fonts: 30, 60
-
- 2) Ways to use different font sizes
-
- a) ALT-Rearrange-Video displays font size choices in Desqview
-
- b) Setting the program itself to a certain font size should be
- respected in Desqview, but you may need to adjust 'Maximum
- Height' to an appropriate number of lines or 'Text Pages to
- 2 or greater, but if 'Text Pages' is set to greater than 1,
- 'Maximum Height' is limited to 25. It sometimes works better
- to set 'Text Pages' to '2', and sometimes 'Maximum Height'
- set to the higher number works better. These settings are
- in 'Change-a-Program', 'Advanced Options.
-
- 3) Ways programs write to the screen
-
- a) Directly to Video Memory (Write directly to the screen)
-
- b) Ask to BIOS to write to screen (Screen writing managed by BIOS)
-
- 4) Which programs write directly to the screen
-
- a) All Graphics Programs
-
- b) About half of all text programs
-
- 5) What the screen can display at any one time
-
- a) One text font
-
- b) Any number of graphic fonts and graphic images
-
-
- 6) How to tell if a program writes directly to the screen
-
- a) If it's a graphic program, it writes directly
-
- b) Set 'Change-a-Program', 'Writes Text directly to the screen?'
- to 'N'. Now start the program and try to put it in a small
- window. If it writes outside of the Desqview borders, that
- means the program writes directly and 'Writes Text Directly...'
- must be set to 'Y'.
-
- 7) When you need to set 'Virtualize Text and Graphics' to 'Y'
-
- a) Virtualization is only for Direct Screen Write programs
-
- b) You only need to Virtualize if you want the progam to stay
- running while it's in the background or stay running while
- it's in a small window.
-
- c) Virtualizing slows programs down, so if your program doesn't
- need to stay running in the background or in a small window,
- you would want 'Virtualize...' set to 'N'.
-
- d) Virtualizing requires Expanded Memory. If the machine is
- low on Expanded memory, the screen could behave poorly
- when a Virtualized window is displayed.
-
- e) If a program is not a Direct Screen Writer, 'Writes Text
- Directly...' and Virtualize...' should both be set to 'N'.
- Desqview can run these programs in a small window and in
- the background without any special adjustments.
-
- 8) Switching Video Modes
-
- a) When switching from a window that is using a Graphic mode to
- a window that is using the 25 line Text mode, the Text program
- will sometimes display 25 lines on a 30 line screen. When
- this happens, the bottom 5 lines of the screen will display
- the program that is in the background. Because there is no 25
- line Graphic mode, Desqview has to do it this way. When the
- screen is in a graphic mode, Desqview has to display Text
- programs as a Graphic also. In graphic mode only 30 and 60
- line fonts are available.
-
- b) One way to run a Graphic program and still have your Text
- program display in a 25 line font is to do ALT-Rearrange-Hide
- before switching away from the Graphic program. This will
- hide it from the screen and allow the Monitor to switch to
- the 25 line Text font. A hidden program that writes directly
- to the screen (all Graphics programs) will not be able to run
- while it is hidden.
-
- c) Another way to use a Graphic program and switch to a 25 line
- Text program is to run the Desqview 'Setup' program and set
- '..display Text and Graphics at the same time?' to 'N'. Now
- when you switch from the Graphic program to the Text program,
- Desqview will put a Curtain over your Graphic program and
- allow the Monitor to return to the Text mode. Virtualization
- will not be possible when this option is selected.
-
- 9) Extended VGA Modes
-
- a) The highest resolution in the IBM VGA Specification is 640x480.
-
- b) Some VGA cards have the capability of displaying resolutions
- of 700X420, 800X600, and 1024X768. These modes are not
- standardized and most of the manufacturers of these cards
- impliment these resolutions differently - consequently
- Desqview cannot fully support these modes.
-
- c) Desqview will support 640X480 in that it can Save and Restore
- screen when programs are switched away from and back to. It
- can also Virtualize this resolution, meaning it will allow a
- 'Direct Screen Write' program to stay running in a small
- window or in the background without bleeding through the
- foreground window.
-
- d) Desqview can Save and Restore 800X600 on some VGA cards if
- 'Graphic Pages' in 'Change-a-Program' is set to 4, but it
- cannot Virtualize it. I'ts sometimes O.K. to set 'Runs in
- Background' to 'Y' and not Virtualize for purposes of printing
- in the background if the program doesn't do screen updates
- or only does minor screen updates while it's printing.
-