Rounded out the PC8080 portion of the tree

devices/pc8080/rom/README.md

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+---
+layout: page
+title: 8080-Based ROMs
+permalink: /devices/pc8080/rom/
+---
+
+8080-Based ROMs
+---
+
+ROMs are added to machines by including one *[ROM](/docs/pcjs/rom/)* component in the machine XML configuration file
+for each ROM in the machine; eg:
+
+	<rom id="romH" addr="0x0000" size="0x0800" file="/devices/pc8080/rom/invaders/INVADERS-H.json"/>
+
+The project currently contains the following 8080-based ROMs:
+
+ * [Space Invaders (1978)](invaders/)
+ * [8080 Exerciser Tests](exerciser/)

devices/pc8080/rom/exerciser/README.md

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+---
+layout: page
+title: 8080 Exerciser Tests
+permalink: /devices/pc8080/rom/exerciser/
+---
+
+8080 Exerciser Tests
+---
+
+* [8080EX1](8080EX1.MAC)
+* [8080EXER](8080EXER.MAC)
+* [8080PRE](8080PRE.MAC)
+
+Our [8080 Exerciser Test Machine](/devices/pc8080/machine/exerciser/) runs the [8080EX1](8080EX1.MAC),
+since it is the most comprehensive test, and was designed specifically for the Intel 8080. 

devices/pc8080/rom/invaders/README.md

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+---
+layout: page
+title: Space Invaders (1978) ROMs
+permalink: /devices/pc8080/rom/invaders/
+---
+
+Space Invaders (1978) ROMs
+---
+
+The original [Space Invaders (1978)](/devices/pc8080/machine/invaders/) contains 4 2Kb ROMs:
+
+* [INVADERS-H](INVADERS-H.json) (loaded at 0x0000)
+* [INVADERS-G](INVADERS-G.json) (loaded at 0x0800)
+* [INVADERS-F](INVADERS-F.json) (loaded at 0x1000)
+* [INVADERS-E](INVADERS-E.json) (loaded at 0x1800)