Clean up bochsrc.txt, add com1 logging

.gitignore

@@ -1 +1 @@
-bochs.log
+*.log

platform/i386_pc/bochsrc.txt

@@ -1,14 +1,22 @@
+# machine
 megs: 128
 cpu: model=pentium
+# roms
 romimage: file=/usr/share/bochs/BIOS-bochs-latest
 vgaromimage: file=/usr/share/bochs/VGABIOS-lgpl-latest.bin
-clock: sync=realtime
-display_library: x
+# device config
 ata0: enabled=1
 ata0-master: type=cdrom, path=out/i386_pc/mop3.iso, status=inserted
+com1: enabled=1, mode=file, dev=bochs-com1.log
+# clock
+clock: sync=realtime
+# boot device
 boot: cdrom
+# logging
 error: action=report
 panic: action=report
 info: action=report
 debug: action=ignore
 log: bochs.log
+# display
+display_library: x