Re: How does the apple2 RGB card work?

["Bryan Parkoff" <none@nospam.net>]

"mdj" <mdj.mdj@gmail.com> wrote in message 
1148960973.360856.166780@j55g2000cwa.googlegroups.com">news:1148960973.360856.166780@j55g2000cwa.googlegroups.com...
> What am I, Google? ;-)
>
> http://bobsc5.home.comcast.net/aal/1986/aal8608.html#a6
>

    Thanks for the information.  Like I said earlier 160 Mode is on Mode 0. 
I think that 160 Mode is not true 640x200 because it has restricted to 
560x192.  When you put low nibble in $2000, four pixels will be displayed in 
position 0 through 3 and high nibble displays only three pixels in position 
4 through 6.  The fact is that it does read four bits in high nibble to 
select one of 16 colors, but it can't display 4 pixels.  It is what I refer 
shrinked from 8 pixels to 7 pixels each column.
    I think that 160 Mode is misconcept so it should be referred to 160 
columns shrinked into 140 Mode.  What do you think?
    Do AE RAMWorks III have optional RGB?  If yes, where should I start 
configuring it?
    I intend to write Video 7 RGB in emulator project.

Bryan Parkoff