ISE PlanAheadで遊んだ
ERROR:Pack:2811 - Directed packing was unable to obey the user design
constraints (LOC=SLICE_X26Y78) which requires the combination of the symbols
listed below to be packed into a single SLICEL component.
というエラーが発生。
それぞれ、SLICEを別に配置しないと悪いみたい?