Re: A83: Re: SpRiTes ?


[Prev][Next][Index][Thread]

Re: A83: Re: SpRiTes ?




True, but there _isn't_ any video ram on the 83! The virtual screen is
actually plotsscreen. Then when you call grbufcpy_v, that buffer is copied to
the display. So for some reason, this guy must be doing several intermediate
calls to grbufcpy_v.

Linus

On 22-Oct-98, David Phillips wrote:

>Two words:  Virtual Screen

>A virtual screen is an off-screen buffer that is the same size as the
>screen.  You draw all of your sprites there, then you dump the virtual
>screen to video memory using a LDIR instruction when you are done drawing
>all of them:

>ld hl,VirtScr
>ld de,VIDEO_RAM
>ld bc,768
>ldir

>-----Original Message-----
>From: yean yean <yhean@mailcity.com>
>To: assembly-83@lists.ticalc.org <assembly-83@lists.ticalc.org>
>Date: Thursday, October 22, 1998 1:48 PM
>Subject: A83: SpRiTes ?


>>
>>Hi !! :)
>>That's me again (the french guy...).I'm still learning ASM
>>and problems come to me (why???):
>>-sprites' problems
>>When my sprite is moving (right/left/up/down, whatever),
>>it flash..?
>>How can I avoid that ?
>>
>>THX ;)
>>
>>yhean
>>
>>(thanks to Linus and Alan C Johnson for their answers about Zasmload)
>>
>>
>>
>>Get your FREE E-mail at http://mailcity.lycos.com
>>Get your PERSONALIZED START PAGE at http://personal.lycos.com




References: