Posted By
indi
on 2008-10-29
16:12:49
|  Re: plus/4 raster interrupt
The reason for 2 seprate IRQ's is that BASIC can do a split screen graphic mode (can't remember the graphic mode off hand). This allowed things like graphics adventures to be written in basic as most of the top part of the screen was a bitmap, and the lower area characters.
Pretty neat for a default basic command....
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