diff --git a/textio/txInput.c b/textio/txInput.c
index 5ecb63b8..569f5520 100644
--- a/textio/txInput.c
+++ b/textio/txInput.c
@@ -1225,36 +1225,29 @@ TxGetLine(
  * ----------------------------------------------------------------------------
  */
 
-#if defined(SYSV) || defined(CYGWIN)
-
 void
 txGetTermState(
-    struct termio *buf)
-{
-    ioctl( fileno( stdin ), TCGETA, buf);
-}
-
-#elif defined (__OpenBSD__) || defined(EMSCRIPTEN)
-
-void
-txGetTermState(
-    struct termios *buf)
-{
-    (void) tcgetattr(fileno(stdin), buf);
-}
-
+#if defined(HAVE_TERMIOS_H)
+    struct termios *buf
+#elif defined(HAVE_TERMIO_H)
+    struct termio *buf
 #else
-
-void
-txGetTermState(
-    txTermState *buf)
+    txTermState *buf
+#endif
+)
 {
+#if defined(HAVE_TERMIOS_H) /* POSIX */
+    (void) tcgetattr(fileno(stdin), buf);
+#elif defined(HAVE_TERMIO_H) /* SYSV */
+    ioctl( fileno( stdin ), TCGETA, buf);
+#else /* fallback to sgtty-style */
     ASSERT(TxStdinIsatty, "txGetTermState");
     /* save the current terminal characteristics */
     (void) ioctl(fileno(stdin), TIOCGETP, (char *) &(buf->tx_i_sgtty) );
     (void) ioctl(fileno(stdin), TIOCGETC, (char *) &(buf->tx_i_tchars) );
+#endif
 }
-#endif /* SYSV */
+
 
 
 /*
@@ -1273,24 +1266,24 @@ txGetTermState(
 
 void
 txSetTermState(
-#if defined(SYSV) || defined(CYGWIN)
-    struct termio *buf
-#elif defined (__OpenBSD__) || defined(EMSCRIPTEN)
+#if defined(HAVE_TERMIOS_H)
     struct termios *buf
+#elif defined(HAVE_TERMIO_H)
+    struct termio *buf
 #else
     txTermState *buf
-#endif /* SYSV */
-    )
+#endif
+)
 {
-#if defined(SYSV) || defined(CYGWIN)
-    ioctl( fileno(stdin), TCSETAF, buf );
-#elif defined (__OpenBSD__) || defined(EMSCRIPTEN)
+#if defined(HAVE_TERMIOS_H) /* POSIX */
     (void) tcsetattr( fileno(stdin), TCSANOW, buf );
-#else
+#elif defined(HAVE_TERMIO_H) /* SYSV */
+    ioctl( fileno(stdin), TCSETAF, buf );
+#else /* fallback to sgtty-style */
     /* set the current terminal characteristics */
     (void) ioctl(fileno(stdin), TIOCSETN, (char *) &(buf->tx_i_sgtty) );
     (void) ioctl(fileno(stdin), TIOCSETC, (char *) &(buf->tx_i_tchars) );
-#endif /* SYSV */
+#endif
 }
 
 
@@ -1313,37 +1306,36 @@ txSetTermState(
 
 void
 txInitTermRec(
-#if defined(SYSV) || defined(CYGWIN)
-    struct termio *buf
-#elif defined (__OpenBSD__) || defined(EMSCRIPTEN)
+#if defined(HAVE_TERMIOS_H)
     struct termios *buf
+#elif defined(HAVE_TERMIO_H)
+    struct termio *buf
 #else
     txTermState *buf
-#endif /* SYSV */
-    )
+#endif
+)
 {
-#if defined(SYSV) || defined(CYGWIN) || defined(__OpenBSD__) || defined(EMSCRIPTEN)
+#if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H)
     buf->c_lflag = ISIG;    /* raw: no echo and no processing, allow signals */
     buf->c_cc[ VMIN ] = 1;
     buf->c_cc[ VTIME ] = 0;
-#else
+#else /* sgtty-style interface */
     /* set things up for us, turn off echo, turn on cbreak, no EOF */
     buf->tx_i_sgtty.sg_flags |= CBREAK;
     buf->tx_i_sgtty.sg_flags &= ~ECHO;
     buf->tx_i_tchars.t_eofc = -1;
 
-#endif /* SYSV */
+#endif
 }
 
 
-
-#if defined(SYSV) || defined(CYGWIN)
-struct termio closeTermState;
-#elif defined (__OpenBSD__) || defined(EMSCRIPTEN)
+#if defined(HAVE_TERMIOS_H)
 struct termios closeTermState;
+#elif defined(HAVE_TERMIO_H)
+struct termio closeTermState;
 #else
 static txTermState closeTermState;
-#endif /* SYSV */
+#endif
 
 static bool haveCloseState = FALSE;
 
@@ -1366,21 +1358,18 @@ static bool haveCloseState = FALSE;
 void
 txSaveTerm(void)
 {
-#if defined(SYSV) || defined(CYGWIN)
-    ioctl( fileno( stdin ), TCGETA, &closeTermState);
-    txEraseChar = closeTermState.c_cc[VERASE];
-    txKillChar =  closeTermState.c_cc[VKILL];
-    TxEOFChar = closeTermState.c_cc[VEOF];
-    TxInterruptChar = closeTermState.c_cc[VINTR];
-    haveCloseState = TRUE;
-#elif defined (__OpenBSD__) || defined(EMSCRIPTEN)
+#if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H)
+#  if defined(HAVE_TERMIOS_H)
     (void) tcgetattr( fileno( stdin ), &closeTermState);
+#  else /* HAVE_TERMIO_H */
+    ioctl( fileno( stdin ), TCGETA, &closeTermState);
+#  endif /* HAVE_TERMIOS_H || HAVE_TERMIO_H */
     txEraseChar = closeTermState.c_cc[VERASE];
     txKillChar =  closeTermState.c_cc[VKILL];
     TxEOFChar = closeTermState.c_cc[VEOF];
     TxInterruptChar = closeTermState.c_cc[VINTR];
     haveCloseState = TRUE;
-#else
+#else /* sgtty-style interface */
     struct ltchars lt;
     txGetTermState(&closeTermState);
     (void) ioctl(fileno(stdin), TIOCGLTC, (char *) &lt);
@@ -1393,7 +1382,7 @@ txSaveTerm(void)
     TxEOFChar = closeTermState.tx_i_tchars.t_eofc;
     TxInterruptChar = closeTermState.tx_i_tchars.t_intrc;
     haveCloseState = TRUE;
-#endif /* SYSV */
+#endif
 }
 
 
@@ -1414,13 +1403,13 @@ txSaveTerm(void)
 void
 TxSetTerminal(void)
 {
-#if defined(SYSV) || defined(CYGWIN)
-    struct termio buf;
-#elif defined (__OpenBSD__) || defined(EMSCRIPTEN)
+#if defined(HAVE_TERMIOS_H)
     struct termios buf;
+#elif defined(HAVE_TERMIO_H)
+    struct termio buf;
 #else
     txTermState buf;
-#endif /* SYSV */
+#endif
 
 #ifdef MAGIC_WRAPPER
     /* If using Tk console, don't mess with the terminal settings;	  */
diff --git a/utils/magsgtty.h b/utils/magsgtty.h
index 59e0678a..a0847d74 100644
--- a/utils/magsgtty.h
+++ b/utils/magsgtty.h
@@ -21,44 +21,18 @@
 #ifndef	_MAGIC__UTILS__MAGSGTTY_H
 #define _MAGIC__UTILS__MAGSGTTY_H
 
-/* maybe this can be #ifndef HAVE_TERMIO_H */
-#if !defined(SYSV) && !defined(CYGWIN)
-
-# ifdef	ALPHA
-# undef MAX
-# undef MIN
+#if defined(HAVE_TERMIOS_H) /* POSIX */
+# include <termios.h>
+#elif defined(HAVE_TERMIO_H) /* SYSV */
+# include <termio.h>
+# include <sys/ioctl.h>
+#else /* Fallback for older BSD/V7 systems */
+# if defined(HAVE_SGTTY_H)
+#  include <sgtty.h>
+# elif defined(HAVE_SYS_IOCTL_COMPAT_H)
+#  include <sys/ioctl_compat.h>
 # endif
-
-/* unclear what platform requires this OpenBSD/FreeBSD ? */
-# ifndef COMPAT_43TTY
-# define COMPAT_43TTY
-# endif
-
-#ifdef HAVE_SYS_IOCTL_H
-#include <sys/ioctl.h>
+# include <sys/ioctl.h>
 #endif
 
-#if defined(HAVE_TERMIOS_H)
-#include <termios.h>
-#elif defined(HAVE_SYS_IOCTL_COMPAT_H)
-/* unclear which platform(s) require <sys/ioctl_compat.h> and the structure
- *  of this file is such that it will try to include it by default, better
- *  to invert the #if and only select this on the known platforms that need
- *  it so that <termios.h> goes by default, which exists on MacOSX, Linux, etc..
- * many possible solutions to make this work by default:
- *   HAVE_SYS_IOCTL_COMPAT_H ?  HAVE_TERMIOS_H ?  !defined(linux) at top (MaxOSX is BSD type)
- */
-#include <sys/ioctl_compat.h> /* replaced sgtty.h */
-#elif defined(HAVE_SGTTY_H)
-#include <sgtty.h> /* legacy - struct sgttyb{} defn */
-#endif
-
-#else
-
-#if defined(HAVE_TERMIO_H)
-#include <termio.h>
-#endif
-
-#endif /* !SYSV && !CYGWIN */
-
 #endif	/* _MAGIC__UTILS__MAGSGTTY_H */