[Coco] help with drawing

[XYZ]

thanks for the help it worked

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----- Original Message ----- 
From: "Robert Gault" <robert.gault at worldnet.att.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Saturday, February 19, 2005 11:58 AM
Subject: Re: [Coco] help with drawing



> It is possible but tricky. You need to be more specific about your 

> request. Do you want to be in a text mode and draw on the graphics screen 

> or be in graphics mode and draw off screen?

>

> The former can be done by telling Basic which hres graphics mode to use 

> but not issuing an HSCREEN command. You must also prevent HSCREEN from 

> clearing the graphics screen, POKE &HE6C6,&H21. Then for example you can:

> POKE&HE6C6,&H21:POKE&HE6,2:HCLS

> HLINE(0,0)-(319,191),PSET

> Then run the program:

> 10 HSCREEN2

> 20 GOTO20

> To see how it works.

>

> If you want a graphics on screen while drawing off screen, you will need 

> to write code in assembly. However, you may be able to pre draw all needed 

> graphics, save them to disk, and load them into memory when your program 

> runs. Again this will take a thorough knowledge of the Coco and some 

> assembly language.

>

> XYZ wrote:

>> I am looking for a way to draw in the background without seeing it then 

>> using the hget hput to put it on the screen

>> I am using a coco3 on the hscreen2 does any body know of a way to do this

>>

>>

>

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