Added VT100 ROM disassembly

devices/pc8080/machine/vt100/README.md

@@ -24,6 +24,8 @@ p. 4-15, 8Kb (0x2000) of ROM is located at 0x0000, and 3Kb (0x0C00) of RAM immed
 0x0000 contains all the VT100's 8080 code.  The VT100 also contains a 2Kb character generator ROM, but that ROM is not
 addressable by the CPU; it is used directly by the Video Processor.
 
+See [DEC VT100 ROMs](/devices/pc8080/rom/vt100/) for more information about the ROMs.
+
 [vt100romhax](http://vt100romhax.tumblr.com/post/90697428973/the-vt100-memory-map-and-8080-disassembly)
 (aka [phooky](https://github.com/phooky) aka Adam Mayer) further explains VT100 memory usage:
 
@@ -125,3 +127,5 @@ Additional VT100 Resources
 --------------------------
 
 [VT100 Publications](/pubs/dec/vt100/)
+
+[D52 Microcontroller Disassemblers](http://www.brouhaha.com/~eric/software/d52/) ([Manual](http://www.bipom.com/documents/dis51/d52manual.html))

devices/pc8080/rom/vt100/README.md

@@ -35,3 +35,15 @@ And sure enough, concatenating those four DEC ROM dumps produces a perfect match
 [VT100.bin](http://trmm.net/images/2/20/VT100.bin).
 
 The VT100 also used one 2Kb character generator ROM, which is stored in [23-018E2.json](23-018E2.json).
+
+Disassembling the 8080 Code
+---------------------------
+
+Following in the footsteps of [vt100romhax](http://vt100romhax.tumblr.com/post/90697428973/the-vt100-memory-map-and-8080-disassembly),
+I disassembled the ROM, using `dz80` from [D52 source code](http://www.brouhaha.com/~eric/software/d52/) ([manual](http://www.bipom.com/documents/dis51/d52manual.html)):
+
+	dz80 -80 archive/VT100.bin
+
+This produced VT100.d80, which I renamed to [VT100.asm](VT100.asm).  I also appeared to run into the same problem that
+**vt100romhax** did: references to `X2000` that needed to be changed to `2000h`.
+