Easter cleaning

src/site/wigiti/msx/memmap2.md

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+# MSX Memory Mapper 2
+
+Upgrade of MSX memory mapper system;
+
+* 144 bit page address
+* 14 bit page size
+* 18 bit width
+
+So the MSX page size goes from 16KB to about 36KB per page.
+
+Max addressable memory of a single mapper in yotta-bytes;
+
+	((2^14)*18*(2^144))/8/1024/1024/1024/1024/1024/1024/1024/1024
+	680020773533228910772224
+
+Google thinks that up to 2025, global data creation is projected  
+to grow to just a small 180 zettabytes, so having multiple copies all  
+human data on a single memory controller should be OK for the nx-01.
+
+![memmap2](images/msx4-memmapper.png "memmap2")
+