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Amiga computer related discussion => Amiga Software Issues and Discussion => Topic started by: AmigaMance on August 20, 2007, 04:58:55 PM

Title: Explanation needed on the SAVEMEM var of CGFX
Post by: AmigaMance on August 20, 2007, 04:58:55 PM
Hi.
 As the subject suggests, i am not sure about the effects of this option. Ok, from its name alone, it's pretty obvious that it reduces memory consumption. Of which memory though? I don't notice ANY difference in my fast-ram, thus i will have to assume that it reduces the consumption of the video ram of the gfx card.. or not? :-? (There is no way to measure the free video ram on CGFX)

 Furthermore, saving memory is always a good thing. There's got to be a disadvantage to this option, because otherwise it would be enabled by default.
 From the CyberGraphX.guide:
 "CyberGraphX will reduce memory consumption in less or equal 16 colour modes, CyberGraphX keeps a planar representation of the screen bitmap in fast memory and a chunky representation in video memory."

(Edit: I suppose that by 16 colour modes, it means 16bit colour modes?)

 Well, i don't really understand this . Could someone give me a simple explanation on what are the pros and cons?
Title: Re: Explanation needed on the SAVEMEM var of CGFX
Post by: zipper on August 20, 2007, 05:55:03 PM
No, it means 8bit modes, if you want to use just 16 colours, saving memory. (well, why would someone need it?)
Title: Re: Explanation needed on the SAVEMEM var of CGFX
Post by: AmigaMance on August 20, 2007, 06:22:51 PM
Quote
No, it means 8bit modes, if you want to use just 16 colours, saving memory.

 So, it means 16 colours (4bit) afterall..

Quote
(well, why would someone need it?)

 Yeah, 4bit screens on CGFX... :-D :-D
Title: Re: Explanation needed on the SAVEMEM var of CGFX
Post by: zipper on August 20, 2007, 09:19:09 PM
As a matter of fact some floppy games could be forced to run on RTG screens when promoted for example via ModePro using the Force Planar option, and SysInfo needed the same trick to show properly on RTG screens. At least when using P96.