--- a/atc/include.h
+++ b/atc/include.h
@@ -69,3 +69,12 @@
 #include "struct.h"
 #include "extern.h"
 #include "tunable.h"
+
+#ifdef __EMSCRIPTEN__
+/*
+ * fredygames.com: there are no signals and no tty in the browser. Keys come from the page and the update timer
+ * (setitimer/alarm) is run by atc_getchar() while it waits for a key (atc.web.c).
+ */
+extern int atc_getchar(void);
+#define getchar() atc_getchar()
+#endif
--- a/atc/input.c
+++ b/atc/input.c
@@ -58,7 +58,11 @@
 
 #define RETTOKEN	'\n'
 #define REDRAWTOKEN	'\014'	/* CTRL(L) */
+#ifdef __EMSCRIPTEN__
+#define	SHELLTOKEN	0x7fff	/* fredygames.com: no shell escape (no fork) */
+#else
 #define	SHELLTOKEN	'!'
+#endif
 #define HELPTOKEN	'?'
 #define ALPHATOKEN	256
 #define NUMTOKEN	257
--- a/atc/main.c
+++ b/atc/main.c
@@ -154,6 +154,10 @@
 
 	tcgetattr(fileno(stdin), &tty_start);
 	tty_new = tty_start;
+#ifdef __EMSCRIPTEN__
+	tty_new.c_cc[VERASE] = 8;	/* fredygames.com: Backspace is ^H, ^U kills the line */
+	tty_new.c_cc[VKILL] = 21;
+#endif
 	tty_new.c_lflag &= ~(ICANON|ECHO);
 	tty_new.c_iflag |= ICRNL;
 	tty_new.c_cc[VMIN] = 1;