GrayScale routine

Contents:

Introduction

Hello, my name is Davy and I come from Belgium. If you find any mistakes in this document, please let me know. My English is not very good. The story begun 2 weeks ago. I was asking around on the internet with the question was: "How can I make a title screen in grayscale". Nobody could help me so I started to write a little grayscale routine. The routine itself is very, very, very easy to understand. All you need is a TI-83+ (off course), IStudio and Z80 Workshop by Ben Ryves(not necessary). Just a good compiler. If you got this. You can start.

My Routine

First, an explanation of the routine:

The routine itself is easy to understand and it's made for MirageOS. It just prints 2 screens (made with IStudio) very fast after each other to the graph buffer (the graph-screen in basic). After the first screen is copied, the graphbuffer will be cleared and then the second screen is copied. If you want a 4-level greyscale title screen, you have to screens. And when you want 8-level greyscale, you need 3 screens. To make the screens, follow these steps:

Making a title screen

  1. Open IStudio and load your picture. The picture must be in BMP format, otherwise it won't work. The size doesn't matter. But don't go over 96x64 pixels. Otherwise you will get some strange effects.
  2. Click on File ... Export and a window will appear.
  3. Select Text File for export options, Z80 (.db) for ASM format.
  4. Save now your picture (the file is converted to .asm format).
  5. Open Z80 Workshop.
  6. Click File, New from template and select MirageOS Prgrm.
  7. Now put this in (Click on the link)
  8. Remember: Layer1 and Layer2 is from the .asm file that you converted with IStudio.
  9. Save your file.
  10. Click on Compile and your program will be compiled.
  11. So it's ready. Send the file to your TI-83+.

This was simple he.

Problems

If there are problems, errors, ... Send me an e-mail.

davy_anthonissen@hotmail.com

feel free to mail.