Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.sys.apple2.programmer > #767

Announce: Aztec C ProDOS Architecture Example - OVERLAYS and Graphing Program

Show all headers | View raw

Available for Download:

http://www.aztecmuseum.ca/GRAPH.zip

ReadMe for C:\AppleX\Programs\GRAPH

This directory contains a prototype framework for a charting system.

The prototype demo program is called linegraf. Read the source code and make 
file and run the program on the disk image provided for more information.

The idea here is break the program up into functional pieces called overlays 
because the Apple II hasn't enough memory for a complex calculation and 
charting system.

There is a main module (linegraf.sys) and 3 pieces (ovr files) in this 
prototype. Additional modules such as a main menu and other display and data 
entry overlay modules can be added to this framework.

I have kept this demo very simple and the modules is this demo are not very 
functional but exercise the basic function of this framework.

If a programmer wanted to write a complex calculation program and then 
display a calculated series of numbers in a graph, he could use this same 
framework to separate his calculation modules from his display modules and 
would not run-out of memory if he was careful. He could also expand the 
functionality to load data sets from file, to save data sets to file, and to 
save and re-load and display or print graphs as screen images. He could have 
black and white or color charting modules, all without running out of 
memory.

The Apple II is a low memory environment. Complex programs must be 
structured modularly to save memory.

Bill Buckels
July 2013 

Back to comp.sys.apple2.programmer | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Announce: Aztec C ProDOS Architecture Example -  OVERLAYS and Graphing Program "Bill Buckels" <bbuckels@mts.net> - 2013-07-24 10:52 -0500
  Re: Announce: Aztec C ProDOS Architecture Example -  OVERLAYS and Graphing Program "Bill Buckels" <bbuckels@mts.net> - 2013-07-24 20:13 -0500

csiph-web