XPost: comp.sys.sinclair, comp.sys.atari.8bit, comp.sys.apple2   
   XPost: comp.sys.cbm   
   From: wizard@emeraldcity.gov   
      
   On Mon, 26 Dec 2005 04:09:32 -0800, Bill H wrote:   
      
      
   > Relying on my memory and a cursory check on a number of websites it   
   > appears that the majority of Z80 cpu based computers had black and   
   > white displays, where as the majority of 65xx computers had a color   
   > display.   
   >   
   > Now there are exceptions to this, but it makes me wonder, did the CPU   
   > influence the display?   
      
      
   	There is something nobody has talked about yet. Possibly because it might   
   not have made it out of Winnipeg. M$ made a CP/M card for the Apple//. It   
   worked in my ][+, sort of worked with my //e clone, and wouldn't work in   
   my GS. It was intended to be a text only display using the Apple as a   
   display unit. I think someone locally wrote a unit for Turbo Pascal which   
   used the Apples memory to display HGR graphics. I took a look at the calls   
   and figured out how the author did it. The M$ card had a special routine   
   which allowed the programmer to directly access the Apples soft switches.   
   The RAM wasn't on the CP/M card. The card just rearranged the available   
   memory from the Apple and had a limited amount of RAM and I guess ROM to   
   replace what was used by the Apple. The memory was allocated and the unit   
   was a series of routines which built on the plot of a single point. It   
   still displayed graphics in colour.   
      
   	The whole process was slower than an Assembly program on the Apple, but   
   faster than Applesoft.   
      
   				Later   
   				Mike   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)