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1991-04-23
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page 1 of 3 4/23/91
DVD Documentation
===================
Len Wilson, Netmail c/o 1:104/425
*** FREE SOFTWARE ***
This program is free and is presented with no guarantees
or warrantees. The author accepts no liability for problems
real or imagined, resulting from its use. This is not
intended to convey any rights other than the free use of
DVDAYS (DVD.COM).
Requirements
------------
386 Compatible
Desqview 2.xx
Contents
--------
DVD.DOC - This file
DVD.COM - The program
DVDAYS is a perpetual calendar and calendar calculator
specifically written to run in a Desqview window. Its
date2days and days2date algorithms are perfect and
very efficient. * These algorithms account for 4 yr leap
cycles, 400 yr leap cycles and 100 yr no-leap cycles.
DVD can handle dates from 01/01/0000 through 12/31/65534
It's range is limited by the size of the computer var-
iable chosen for the year ( 16 bits ).
* Note
------
The gregorian calendar ( the one we use ) was established by
papal decree in the mid-1500's. Therefore, date calculations
by DVD for dates before that time will be mathematically
correct but not historically valid.
page 2 of 3
Special Keys
------------
1. F1 - F4 are menu selections ( self-explanatory ).
2. PGUP and PGDN change the displayed calendar a year
at a time.
3. UPARROW and DNARROW change the displayed calendar
a month at a time.
Entering Dates
--------------
DVD expects dates to have the following format:
MONTH(separator)DAY(separator)YEAR. The separators
can be just about any non-numeric character.
Examples
Enter DVD assumes
----- -----------
01-23-1990 = 01-23-1990
1 23 = 01-23-[current year]
1-23-1 = 01-23-1991 (assumes current decade)
1 23 01 = 01-23-1901 (assumes current century)
[RET] = Current date
page 3 of 3
Just copy DVD.COM to your hard disk and use the following
Desqview setup (for best results).
Change a Program
Program Name............: ANYTHING
Keys to Use on Open Menu: ANY KEYS Memory Size (in K): 15
─────────────────────────────────────────────────────────────────────────
Program...: C:\your_dir\DVD.COM
Parameters:
Directory.:
─────────────────────────────────────────────────────────────────────────
Options:
Writes text directly to screen.......: [N]
Displays graphics information........: [N]
Virtualize text/graphics (Y,N,T).....: [T]
Uses serial ports (Y,N,1,2)..........: [N]
Requires floppy diskette.............: [N]
Change a Program Advanced Options
Window Position:
Maximum Height: 25 Starting Height: 0 Starting Row...: 0
Maximum Width.: 80 Starting Width.: 0 Starting Column: 0
Close on exit (Y,N,blank)......: [Y] Uses its own colors..............: [Y]
Allow Close Window command.....: [Y] Runs in background (Y,N,blank)...: [N]
Uses math coprocessor..........: [N] Keyboard conflict (0-F)..........: [0]
Share CPU when foreground......: [Y] Share EGA when foreground/zoomed.: [Y]
Can be swapped out (Y,N,blank).: [Y] Protection level (0-3)...........: [0]
END