On Fri, 19 Oct 2018 08:51:09 -0000 (UTC), Martijn van Buul wrote:   
   >   
   > * Andreas Kohlbach:   
   >> On 17 Oct 2018 21:05:34 GMT, Etienne von Wettingfeld wrote:   
   >   
   >>> It has an Assembler monitor, but I think Lucifer means two screens at once.   
   >>>   
   >>> It actually can, one using the 40 collumn mode and one the 80 character   
   one.   
   >>   
   >> But not at the same time AFAIK. When you switch the mode the content what   
   >> was displayed in the mode before just froze on the other display.   
   >   
   > Well, that depends on your point of view. There are a few gotchas:   
   >   
   > The 40 column screen used a video chip closely related to the one in the   
   > C64. As such, it could only operate on 1MHz - if you wanted to use the   
   > 128's higher clockspeed (a blazing fast 2MHz), you were forced to blank   
   > the 40 colum screen and use the 80 column screen instead (as it used a   
   > separate video chip which didn't have this limitation).   
   >   
   > So it did make sense to disable the 40 column screen, if the user switched   
   > over to 80. This is assuming that the user didn't really have 2 monitors   
   > to begin with, but only switched input source on their monitor - the 40   
   > column output would go to waste anyway.   
   >   
   > But that doesn't mean it couldn't be done to have both outputs active. In   
   > fact, it was quite normal for software development.   
   >   
   > A random demo I found on the interwebs:   
   >   
   > https://www.youtube.com/watch?v=s2dcqkM-jeM   
      
   Thanks for the information.   
      
   I was watching a video on Youtube a while ago where the presenter showed   
   how the 40 column froze when switching to 80 columns. I just took 20   
   minutes to find it but was unsuccessful.   
   --   
   Andreas   
      
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