Add 8080-to-8086 translation

docs/api/custom-platform.md

@@ -32,6 +32,9 @@ if a line ends with a backslash character, the value continues to the next line.
     * `i8080` (Intel 8080; experimental, buggy and very incomplete)
     
     * `gameboy` (Sharp LR35902; experimental, buggy and very incomplete)
+    
+    * `i8086` (Intel 8086; very experimental, very buggy and very, very incomplete –
+    see the [8086 support disclaimer](../lang/x86disclaimer.md))
 
 * `encoding` – default encoding for console I/O, one of 
 `ascii`, `pet`/`petscii`, `petscr`/`cbmscr`, `atascii`, `bbc`, `jis`/`jisx`, `apple2`,

docs/api/target-platforms.md

@@ -87,6 +87,8 @@ The compiler emits COM files.
 
 * `cpm_z80` – CP/M on Z80
 
+* `dos_com` – a COM file for DOS on IBM PC. (very experimental)
+
 The primary and most tested platform is Commodore 64.
 
 Currently, targets that assume that the program will be loaded from disk or tape are better tested.