A very rough prototype prototype, graphics based "invaders" type game.

This is a very old program to write out an ASCII table to a file - with the character, and the decimal, binary, octal, and hexadecimal indexes.

A very old character based very rough prototype "invaders" type game.

My very rough prototype character based prototype version of Columns.

Copy_File_Mod_DateTime copies the file modified date/time from all files in the current directory which have a particular extension to the same file with another extension.

Copy_File_Mod_DateTime is a console application for DOS which runs perfectly in a DOS shell, command line, DOS batch script, etc under Windows 95, 98, NT, 2000, XP, Vista, 7, 8, etc.

Why is this useful ? Why do this ? I do lots of video and picture conversions, and I wanted the converted files to have the same modified date/time as the original file. I did a bunch of internet searches, but these found no program or utility that did this. So, I wrote this program to do what I needed.

See the program's readme file and the "Sample Execution / Demo" in the program's readme file and the screen shot for further details.

This program is a Loan Analyser. You enter the Loan Principal, the Loan Interest Rate, the Loan Payments Per Year (eg. 52, 26, 12), the Loan Repayment Per Period, and an output Report File Name.

The program then writes the Repayment Analysis report to the file name you specify, and this report contains a detailed analysis of the cummulative interest, principal repayed, and all details of the loan on a period by period basis for the life on the loan.

Windows users - please use Real Estate Calculator.

This is a very old character based prototype "Security" program - suitable for a DOS environment.

Basically, it squawks like hell if you type in the wrong password. BTW, the password is XXXX or xxxx !

Sanitize Disk Space enables you to select any writable drive connected to your PC, such as any USB thumb drive, external harddrives, network drives, or any of your PC's harddrives or harddrive partitions, and then sanitize the free / unused space on this drive.

The following sanitization levels are supported by this program:

1. Prepare for Drive Imaging (1 pass)
2. Basic / Quick (1 Pass)
3. Medium (3 Passes)
4. High (9 Passes)
5. Industrial Strength (20 Passes)
6. Department of Defense (35 Passes)
7. You've Got to be Joking (100 Passes)

Once sanitized (at a high sanitization level), the data in your deleted files can never again be recovered, and no hacker - no matter how clever - should ever be able to view any data contained in your deleted files.

This processing should be highly desirable for anyone who is selling or replacing their PC - especially if the PC contained any sensitive or personal or confidential data.

This is the Windows Command Line version of this program. There is another version as well, see Sanitize Disk Space - the Windows Graphical User Interface (GUI) version.

This is a DOS memory resident (TSR) program, which allows you to grab TEXT from other DOS text based applications.

Basically, it pops up over the top of these applications and grabs their text screens, when you press the Hot-Key.

My prototype character based prototype version of Tetris.

The Tetris program includes various levels of play with different shape sets: Kids Tetris (easy), standard Tetris, hard Tetris, and Nightmare !