@@ -84,8 +84,9 @@
 	arg_duo, arg_hex, arg_b32, arg_b64,
 
 	switch_prefix, param_prefix,
 	switch_lowercase,
+	switch_7bit,
 
 	arg_ebcdic,
 };
 
@@ -127,8 +128,9 @@
 	{arg_hex, "b32"}, {arg_hex, "base32"}, /* not padded! */
 
 	{switch_prefix, "-p"}, {switch_prefix, "--prefix"},
 	{switch_lowercase, "-l"}, {switch_lowercase, "--lowercase"},
+	{switch_7bit, "-7"}, {switch_7bit, "--7bit"},
 	{param_prefix, "-m"}, {param_prefix, "--manual-prefix"},
 
 	{arg_ebcdic, "ebcdic"},
 };
@@ -141,8 +143,11 @@
 	iaia_e_domain = bad_domain,
 	iaia_e_base = bad_base,
 	iaia_e_overflow = bad_overflow,
 };
+bool ascii_7bit = false;
+#define _IAIA_EXP_ASCFORM ascii_7bit
+#define _IAIA_EXTERNAL_TYPES
 #include "clib/iaia.c"
 
 bad run(const int argc, const char** argv) {
 #	ifndef _POSIX_IO
@@ -164,9 +169,9 @@
 	bool lowercase = false;
 
 	for (const char** arg = argv + 1; *arg != null; ++arg) {
 		uint8_t tblval;
-		if (*arg[0] == '%') { ++ *arg; goto number; } else
+		if (*arg[0] == '`') { ++ *arg; goto number; } else
 		if (!raw && (tblget(sz(argtbl),argtbl, *arg, &tblval) == ok)) {
 			enum argument symbol = (enum argument) tblval;
 			switch (symbol) {
 				case arg_to: {
@@ -200,8 +205,9 @@
 
 				/* specify an automatic output prefix */
 				case switch_prefix: { prefix = true; pfxstr = null; } break;
 				case switch_lowercase: { lowercase = true; } break;
+				case switch_7bit: { ascii_7bit = true; } break;
 
 				default: {
 					/* assume base shorthand */
 					base[curset] = bases[symbol];
@@ -289,13 +295,18 @@
 			p("binary literal: "lit("0b") box("01") plus),
 			p("ternary literal: "lit("0t") box("012") plus),
 			p("hex literal: "lit("0x") box("0-9A-Fa-f") plus),
 			p("ascii literal: "lit("@") "\x1b[94m.+\x1b[m"),
-			p("interpret any string (e.g. a keyword) as integer: " lit("%") box("0-9A-Za-z") plus),
+			p("interpret any string (e.g. a keyword) as integer: " lit("`") box("0-9A-Za-z") plus),
 		}, opts[] = {
 			p("-p --prefix       : print known prefix codes on output strings"),
 			p("-m --manual-prefix: specify a manual prefix to print before each number"),
 			p("-l --lowercase    : prefer lowercase for case-insensitive bases"),
+			p("-7 --7bit         : encode ascii in 7-bit space instead of keeping the"),
+			p("                    eighth empty bit. if this option is used, ascii"),
+			p("                    strings will be maximally compact, but will not match"),
+			p("                    the way they are stored in computer memory!"),
+			/* p("-u --utf           : allow non-ascii input"), */
 		};
 #	undef p
 #	undef OR
 #	undef plus