Re: RGB's Pixel Misalignment

["Bryan Parkoff" <nospam@nospam.com>]

"mdj" <mdj.mdj@gmail.com> wrote in message 
1151390274.055215.158040@y41g2000cwy.googlegroups.com">news:1151390274.055215.158040@y41g2000cwy.googlegroups.com...
>
> Bryan Parkoff wrote:
>> Hello,
>>
>>     It is about Apple //e's 80 col & RGB card.  I know that I have been
>> discussing for a while.  I find this interesting why pixel position is in
>> misalignment.  I wonder if Matt knows the answer.
>>     Think about Apple IIgs.  DHGR can set color and monochrome while it
>> remains in the same position 0 through position 559 however Apple //e's 
>> 80
>> col & RGB card does not.
>>     When you set monochrome only or color only, it stays in position 0
>> through 559.  If you set mixed monochrome and color, it is in position 0
>> through 563.  Between position 560 and position 563 have extra 4 pixels.
>
> I don't recall any such artifacting myself... How are you producing
> these results?
>
>> Left pixels are in monochrome and right pixels are in color.  I have
>> unexplained answer why Video 7 decides to do it.  It should be in 
>> position 0
>> through position 559 without any extra 4 pixels.  In my opinion, 80 
>> column
>> text might be unreadable in monochrome when it is very closer beside to 
>> the
>> color pixel's edges.
>
> I'm not really sure what you mean here. With what programs are you
> getting these results?
>
>>     You may notice that four lines in 80 column is in position 0 through
>> position 559 while LGR in column is in position 7 through position 566.
>>     Can you please provide your opinion?  Is it possible that Video 7 
>> made
>> mistake to design RGB card?  Or...it was up to their decision how to 
>> design
>> it?
>
> I think the 'shifting' slightly to the right is the result of a slight
> delay induced by the RGB colour decoder circuitry. I'll have a bit of a
> play with my IIe sometime this week and let you know how my adaptor
> behaves.
>
> Matt
>
Matt,

    I would like to discuss with you personally via e-mail so I can send you 
my demo disk according to my own programming.  It does include Mode 0 
(640x192) through Mode 3.
    My e-mail address is bparkoff(symbol)attglobal(symbol)com.  Replace 
(symbol) with @ and dot.  Change from com to net and from att to sbc.

Bryan Parkoff