Sellam,
   Actually, the /4A used a different video chip.  The one used in the
original /4 was a TMS9918, the /4A used the TMS9918A, which added a 
192x256 pixel bit mapped mode.
   Later,
     Frank
     (Who subscribes to the 99/4A mailing list, too, since I still
     have my original 99/4A)
Sellam Ismail wrote:
> 
> 
> From my understanding, the TI-99/4 and 99/4a are the same save for the
> keyboard.
> 
> Are there any motherboard differences?  I wouldn't think so.
> 
> Sellam Ismail                                        Vintage Computer Festival
Received on Sun Apr 14 2002 - 21:48:04 BST
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