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-
- Part of the ENHANCER series of programs EGACHG.COM Ver. 1.1, Feb 17, 1986
-
- Copyright (C) I. B. Miller 1985, 1986
-
- If you find this of value and use it please send a
- contribution ($25.00) suggested.
-
- To: Enhancers It is suggested that companies contribute
- 231 Otonabee Ave. more for use on more than one machine.
- Willowdale, Ontario, Canada
- M2M-2S9 Please contact me for a site license
- Phone (416) 226-9753
-
- EGACHG is a program which provides a means to preset 12 palette color
- combinations for EGACLR.COM a companion program which Controls the seventeen
- palette registers on the enhanced color card ( Enhanced Graphics Adapter),
- 12 different user selected color combinations of any 16 of the 64 colors
- available can be made active by use of the Alt key at the same time as any of
- the number keys 1 to = at the top of the qwerty keyboard. EGACHG will change
- the colors in the Palette registers so that you can see what is available but
- unless you use EGACLR these will be lost at the next video reset called by
- any program.
-
- The actual colors available to you depend on your actual hardware set
- up and so may be different. As an example if you have only a regular monitor
- you will have only standard colors though you will be able to swap them around.
- In my experience THE limiting factor for text display is the monitor. Though
- for graphic display memory size is also a limiting factor.
-
-
- General Information
- -------------------
-
- With the Enhanced Monitor color coding is as follows.
-
- Bit Hex
- --- ---
- 1 is Medium Blue - 01
- 2 is Medium Green - 02
- 3 is Medium Red - 04
- 4 is Low intensity Blue - 08
- 5 is Low intensity Green - 10
- 6 is Low intensity Red - 20
- 1+4 is High intensity Blue - 09 Low and medium add to give
- 2+5 is High intensity Green - 12 high - this is the basic
- 3+6 is High intensity Red - 24 principle the card works on
-
- Following is the standard color palette combination.
- ----------------------------------------------------
- B B G C R M B W G High intensity colors O
- l l r y e a r h r --------------------- v
- a u e a d g o i e B G C R M B W e
- c e e n e w t y l r y e a r h r
- k n n n e u e a d g o i s
- t e e n e w t c
- a n t n e a
- a n
- palette
- register # = 0 1 2 3 4 5 6 7 8 9 A B C D E F 10
- ^-this is the
- Seventeenth or in hex it
- is 10. It really cannot be used
- in Enhanced Mode because of a seeming
- bug in the EGA. I cannot believe IBM
- wanted it that way. Try it and see.
-
- How the program works
- ---------------------
-
- The program works by loading in the entire EGACLR.COM file
- and then selecting the color controlling bytes which are all near
- the start as initial values for setting the colors. It then follows
- the user through the registersets updating them in memory and
- changing them and the colors on display as the user dictates.
-
- Once the user is finished changing colors to his liking and
- has pressed the End key EGACHG first checks to see how high in the
- sequence of possible EGACLR1.COM to EGACLR99.COM exists on the disk.
- once found it increments this and writes out a temporary file. After
- it has succeeded in the write it renames the original EGACLR.COM to
- EGACLR(whatever #).COM and then renames the temporary file to
- EGACLR.COM. In theory you could change names and have almost unlimited
- numbers of color combinations which can be made active by using these
- variants of EGACLR.COM, but in practice I find it adequate to have
- a few and use the command parameters with EGACLR.COM to change <alt 1>
-
-
- Instructions
- ------------
-
- EGACHG has been written to work on the EGACLR.COM file on the
- same drive as EGACHG.COM. Make sure both are present on the same disk.
-
- Important: Unless you use the EGACLR o command line to turn off auto reset,
- or have not yet activated EGACLR, then EGACLR will proceed to
- not allow this program to show the colors to you. You must
- Deactivate (or not start) EGACLR before starting EGACHG.
-
- The program will proceed to load into itself the EGACLR.COM file.
- It will then paint a window on the top half of the screen showing the
- palette colors currently in use with EGACLR use of <Alt 1> which
- I call registerset # 1. The program will next paint the bottom window
- which is the working area and will display the current register of the 17
- included in the current registerset as well as the current value in that
- register displayed in both decimal and Hex. It will also show the RGB comp-
- onents of the color corresponding to that value.
-
- The screen painted appears approximately as follows with of course the
- addition of color.
-
-
- EGACHG.COM A program to change colors to any 16 of 64 available on the EGA
- for use with a companion program EGACLR.COM which must be on same drive.
- Register 0 1 2 3 4 5 6 7
- _______________________________________________________________________
- | | | | | | | | |
- | | | | | | | | |
- | Blocks of colors appear here and change as palette registers change |
- |________|_______|________|________|________|________|________|________|
- | | | | | | | | |
- | under the control of the operator | | | |
- | | | | | | | | |
- |________|_______|________|________|________|________|________|________|
-
- Register 8 9 A B C D E F
- Below is current color being worked on.
- ____________________________________________________________________________
- | |
- | |
- | |
- |__________________________________________________________________________|
- PgUp & PgDn change registerset, Up & Dn change registers, + & - change colors,
- End to quit & save , Q to quit & not save! ,W to write BAT file ,R,G,B to vary
- Current Palette Registerset is : 5 10,11,12 are 0,-,=
- Current Palette Register is : 01 Color is: 2 Color in Hex is : 02
- Current RGB values are : R= off
- G= med
- B= off
-
-
- From then on you are in the part of the program that does all the
- work and the following keys are the only ones which will do anything.
-
- PgUp Moves Up one registerset from 1 to 12 then back to 1
- PgDn Moves Down one registerset from 12 to 1 then back to 12
-
- Up-Arrow Moves up one Pallette register from 0 to 16 then back to 0
- 0 to 10 Hex
- Dn-Arrow Moves Down one Pallette register from 16 to 0 then back to 16
- 10 to 0 Hex
-
- + Increases value in Pallette register from 0 to 63 then back to 0
- 0 to 3F hex
- - Decreases value in Pallette register from 63 to 0 then back to 63
- 3F to 0 hex
-
- R Changes Red component of color through off, low, med, high & back
- G Changes Green component of color through off, low, med, high & back
- B Changes Blue component of color through off, low, med, high & back
-
- Q Allows you to quit without creating an output file
-
- S Standardizes colors In current Registerset
-
- W writes out a .BAT file to reset colors in Alt 1 . A sample appears
- here.
-
- EGACLR 02A,126,202,337,404,505,614,707,818,919,A1A,B1B,C3C,D2D,E36,F3F,s00
-
- End Writes out all the values to an EGACLR.COM files while saving the
- previous ones as EGACLR1.COM up to EGACLR99.COM
-
-
- Use the End key when you have completed your selection.
- the program will then update EGACLR.COM with your selected
- colors available from <alt 1> to <alt =>.
-
- you may then activate the colors by entering at the DOS prompt
- EGACLR R
-
-
- Disclaimer
- ----------
- For obvious reasons the user is totally responsible for use of this
- program and determining that it is suitable for use by him, and he uses this
- program with no warranty from myself.
-
- It should work properly with the EGA from IBM or any card which later
- maintains compatibility with it
-
- This program and EGACLR.COM are used by myself with LOTUS Development
- programs and work well solving a colors shift bug (or less than perfect EGA
- driver routine) but obviously LOTUS does not support it.
-
- General
- --------
-
- Again please note that if you have the regular monitor or the Enhanced
- Monitor operating in regular mode none of the non-standard colors are available
- to you!
-
-
- Of Course
- ----------
- The program EGACHG.COM will allow you to work with many colors and
- see them on screen interactively without any of the work involved in
- remembering all the numbers and color coding schemes. I believe it will
- make color control easy.
-
-
- If you have any comments or suggestions please contact
- me either at Home in the evenings at (416) 226-9753
- or at the following BBS's PCanada(pc-1266) (416) 751-6337
- SGV-BBS (416) 673-0557
-
- I am also on Compuserve as 72167,2563
-
- Ivor B. Miller