Index: tools/ew.py
===================================================================
--- tools/ew.py	(revision 0ceeac31d0c28d06ca57cb1ae49e239b6f40e069)
+++ tools/ew.py	(revision 826a0a97b8e4e1bf926ddd80f683b9a6c3a158b7)
@@ -212,4 +212,7 @@
 		cmdline += ' -nographic'
 
+	if (is_override('bigmem')):
+		cmdline += ' -m 4G'
+
 	if cfg['image'] == 'image.iso':
 		cmdline += ' -boot d -cdrom image.iso'
@@ -334,4 +337,6 @@
 	print("-noxhci\tDisable XHCI support, if applicable.")
 	print("-notablet\tDisable USB tablet (use only relative-position PS/2 mouse instead), if applicable.")
+	print("-nographic\tDisable graphical output. Serial port output must be enabled for this to be useful.")
+	print("-bigmem\tSets maximum RAM size to 4GB.")
 
 def fail(platform, machine):
@@ -387,4 +392,6 @@
 		elif sys.argv[i] == '-nographic':
 			overrides['nographic'] = True
+		elif sys.argv[i] == '-bigmem':
+			overrides['bigmem'] = True
 		elif sys.argv[i] == '-qemu_path' and i < len(sys.argv) - 1:
 			expect_qemu = True