diff --git a/host/scripts/inlretro.lua b/host/scripts/inlretro.lua
index 19e3457..9178f2e 100644
--- a/host/scripts/inlretro.lua
+++ b/host/scripts/inlretro.lua
@@ -139,7 +139,10 @@ function main ()
 		prg_rom_size_kb = 256 * 128,	-- Size of NES PRG-ROM in KByte
 		chr_rom_size_kb = 8,			-- Size of NES CHR-ROM in KByte
 		wram_size_kb = 0,				-- Size of NES PRG-RAM/WRAM in KByte
-		rom_size_kbyte = 8 * 128, 		-- Size of ROM in Megabits, used for non-NES consoles.
+		rom_size_kbyte = 8 * 128, 		-- Size of ROM in kilobytes, used for non-NES consoles.
+		
+		-- If more convienient, specifying size in megabits is also supported.
+		-- rom_size_kbyte = 8, 			-- Size of ROM in megabits, used for non-NES consoles.
 	}
 
 
diff --git a/host/source/inlprog.c b/host/source/inlprog.c
index a009701..505df59 100644
--- a/host/source/inlprog.c
+++ b/host/source/inlprog.c
@@ -27,9 +27,10 @@ const char *HELP =  "Usage: inlretro [options]\n\n"\
 					"  --dump_ram_filename=filename, -a filename\tIf provided write ram to this filename\n"\
 					"  --help, -h\t\t\t\t\tDisplays this message.\n"\
 					"  --lua_filename=filename, -s filename\t\tIf provided, use this script for main application logic\n"\
-					"  --mapper=mapper, -m mapper\t\t\tNES console only, mapper ASIC on cartridge\n"\
-					"  \t\t\t\t\t\t{action53,bnrom,cdream,cninja,cnrom,dualport,easynsf,fme7,\n"\
-					"  \t\t\t\t\t\t mapper30,mmc1,mmc3,mmc4,mmc5,nrom,unrom}\n"\
+					"  --mapper=mapper, -m mapper\t\t\tNES, GB consoles only, mapper ASIC on cartridge\n"\
+					"  \t\t\t\t\t\tNES:\t{action53,bnrom,cdream,cninja,cnrom,dualport,easynsf,fme7,\n"\
+					"  \t\t\t\t\t\t\t mapper30,mmc1,mmc3,mmc4,mmc5,nrom,unrom}\n"\
+					"  \t\t\t\t\t\tGB:\t{mbc1,romonly}\n"\
 					"  --nes_prg_rom_size_kbyte=size, -x size_kbytes\tNES-only, size of PRG-ROM in kilobytes\n"\
 					"  --nes_chr_rom_size_kbyte=size, -y size_kbytes\tNES-only, size of CHR-ROM in kilobytes\n"\
 					"  --rom_size_kbyte=size, -k size_kbytes\t\tSize of ROM in kilobytes, non-NES systems.\n"\