ROM/RAM, LEON2

今日は例の8bit CPUにROMとRAMをインプリメント．
設計段階でチップイネーブル(CE)を忘れたと捨て台詞を残して行かれた
上司の方が一足先にお休みに入って仕舞ったので，
取り敢えず，アドレスバスから1bit拝借して再実装． :P
[Today, I implemented ROM/RAM to the stupid 8bit CPU.
My boss said to me "Well, I forgot to designing it has CE, though."
And then, my boss is already enjoying his vacation.
So, I've re-used a bit which is MSB of address bus as its CE. :P]

で，Gaisler Researchさんから
LEON2のVHDLを拝借してモニョろうかと思ったら，
オリジナルでバンドルされているMakefileがGHDLに対応しているよ． :o
さくっとテストベンチまで走る．
相当ヤヴァいな，この会社． ;P
[And then,
I got LEON2 VHDL source from Gaisler Research
for poke it with GHDL.
Fortunately, its Makefile already has GHDL target.
And then it can run its test-bench without any editing. :o
Well, it should be awesome, IMHO. ;P]