Changes
/* The Vectored Interrupt Bug */
The bug relates to the raster interrupt. When a raster interrupt is acknowledged sometimes the vector will be 6 (for raster interrupt) or 4 (for dma channel 0 - the lowest priority interrupt).
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* If the instruction at the time of interrupt acknowledge is located in a memory region where A13=0 then the bug happens. The bug is not dependent on RAM or ROM or I register value. The location of the interrupt handler code is also not important. The location of the instruction is important. The bug also doesn't
* If the instruction at the time of interrupt acknowledge is located in a memory region where A13=1 then the bug doesn't happen. Therefore to workaround the issue put your code between &2000-&3fff, &6000-&7fff, &a000-&bfff, &e000-&ffff. You can place your I value anywhere and the code for your interrupt handlers can
be anywhere.
== Technical ==
