Re: My ColourPET Project

I am currently disassembling and commenting both 40 and 80 column roms, but I don't have a lot of experience with the DIN roms. I think there is extra code in there. 
Which ROM did you try to modify?
 
It seems the following are issues to watch out for:
 
- CRTC vs NON-CRTC (not much of an issue now)
- 9" vs 12" Monitor Size- Screen standard (NTSC / PAL / Custom)
  > First PET had NTSC, rest seem to have custom (ie: 20kHz)
- 40 / 80 column:
   > screen line linking
   > screen line address table
   > default character set (text / graphics)
- Keyboard Tables (N / B / DIN / Custom)
  > Custom - C64 keyboard (see my PET Keyboard Replacement Project)
- Extra features:
  >  80 column (windowing, erase to start/end, scroll up/down)
  > DIN has CTRL key
- 50/60 Hz:
  > 50 Hz has additional clock adjustment routine
  > CRTC registers
 
Can anyone think of any other known differences?
 
Steve
 
 

>________________________________
> From: Christian Dirks <Toast_r@IdeaLine.info>
>To: cbm-hackers@musoftware.de 
>Sent: Sunday, April 14, 2013 9:09:25 AM
>Subject: Re: My ColourPET Project
>  
>
>
>Hi Steve,
>this would help me. I tried to do it myself, but it only works in
      part.
>
>Christian
>
>Am 13.04.2013 18:23, schrieb Steve Gray:
> 
>Hi, 
>>  
>>I haven't seen an official one, but if you give me a few days I can create one for you. 
>>  
>>Steve 
>>  
>>PS: For those interested in building a ColourPET I have posted a new edit ROM with correct timing for NTSC monitors, as well as the CRTC Explorer program on my webpage. 
>>
>>
>>From: Christian Dirks mailto:Toast_r@IdeaLine.info
>>>To: cbm-hackers@musoftware.de 
>>>Sent: Friday, April 12, 2013 6:19:01 PM
>>>Subject: Re: My ColourPET Project
>>>  
>>>
>>>Am 12.04.2013 16:21, schrieb Steve Gray:
>>>> Actually, it would be nice if someone in PAL
                  country could help me with the PAL timing values. I
                  will make the software you see in the screenshots
                  available to download.
>>>Since I have no 4032 around, I am switching a 8032 to
                  4032.
>>>It has the business keyboard, so I need a editor rom
                  edit-4-40-b-50Hz.
>>>DIN would be perfect, but I can also use a ascii
                  keyboard.
>>>Does anyone have a suitable .bin around ?
>>>
>>>Christian
>>>
>>>-- Christian Dirks
>>>Toast_r@Idealine.info
>>>
>>>
>>>
>>>      Message was sent through the cbm-hackers mailing
                  list
>>>
>>>
>>>       
>
>
>-- 
Christian Dirks Toast_r@Idealine.info  
>
>    

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