Documentation updates

devices/pc/rom/README.md

@@ -6,16 +6,22 @@ redirect_from:
   - /devices/pc/bios/
 ---
 
-BASIC ROMs
+IBM PC 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="romBIOS" addr="0xf0000" size="0x10000" alias="0xff0000" file="/devices/pc/rom/5170/bios/1984-01-10/ATBIOS-REV1.json"/>
+
+### BASIC ROMs
+
 The project contains the following IBM PC BASIC ROMs:
 
  * [IBM BASIC 1.00](5150/basic/BASIC100.json)
  * [IBM BASIC 1.10](5160/basic/BASIC110.json)
 
-BIOS ROMs
----
+### BIOS ROMs
 
 The project contains the following IBM PC BIOS ROMs:
 
@@ -25,7 +31,14 @@ The project contains the following IBM PC BIOS ROMs:
  * [Model 5160: Nov 08, 1982](5160/bios/1982-11-08/XTBIOS-REV1.json)
  * [Model 5160: May 09, 1986](5160/bios/1986-05-09/XTBIOS-REV3.json)
 
-As well as BIOS ROMs, with more detailed information, for the following machines:
+The project also contains BIOS ROMs, along with more detailed information, for the following machines:
 
  * [IBM PC AT Model 5170](5170/bios/)
  * [COMPAQ Portable and DeskPro Machines](compaq/bios/)
+
+### Other ROMs
+
+The project contains other ROMs, including IBM [EGA](/devices/pc/video/ibm/ega/#ibm-ega-rom) and
+[VGA](/devices/pc/video/ibm/vga/#ibm-vga-rom) ROMs, the Xebec Hard Disk Controller ROM used in
+the PC XT, etc, but those ROMs seemed more appropriately filed in their respective component folders;
+eg, [IBM PC Video Devices](/devices/pc/video/).