diff --git a/sys/amiga/amidos.c b/sys/amiga/amidos.c
index 9de6a0810..47b793762 100644
--- a/sys/amiga/amidos.c
+++ b/sys/amiga/amidos.c
@@ -20,10 +20,8 @@
 
 #undef COUNT
 
-#if defined(__SASC_60) || defined(__GNUC__)
 #include <proto/exec.h>
 #include <proto/dos.h>
-#endif
 
 /* POSIX stubs needed by libnix (-noixemul) */
 #ifdef __noixemul__
@@ -85,11 +83,6 @@ free_nhuuid(void)
     }
 }
 
-#ifdef AZTEC_50
-#include <functions.h>
-#undef strcmpi
-#endif
-
 /* Prototypes */
 #ifndef CROSS_TO_AMIGA
 #include "NH:sys/amiga/amiwind.p"
@@ -107,9 +100,7 @@ extern struct window_procs amii_procs;
 struct ami_sysflags sysflags = {0};
 FILE *fopenp(const char *, const char *);
 
-#ifndef __SASC_60
 int Enable_Abort = 0; /* for stdio package */
-#endif
 
 /* Initial path, so we can find NetHack.cnf */
 char PATH[PATHLEN] = "NetHack:";
diff --git a/sys/amiga/amigst.c b/sys/amiga/amigst.c
index 8f6a74f64..6e6697111 100644
--- a/sys/amiga/amigst.c
+++ b/sys/amiga/amigst.c
@@ -17,25 +17,10 @@
 #include <string.h>
 #include <errno.h>
 
-#ifdef __SASC
-#include <dos.h> /* for __emit */
-#include <string.h>
-#include <proto/dos.h>
-#include <proto/exec.h>
-#include <proto/graphics.h>
-#include <proto/intuition.h>
-#include <proto/diskfont.h>
-#include <proto/console.h>
-#endif
-
 #include "hack.h"
 #include "winprocs.h"
 #include "winami.h"
 
-#ifdef AZTEC
-#include <functions.h>
-#endif
-
 #ifndef CROSS_TO_AMIGA
 #include "NH:sys/amiga/winami.p"
 #include "NH:sys/amiga/amiwind.p"
diff --git a/sys/amiga/amirip.c b/sys/amiga/amirip.c
index 5f4aa52af..6c23a4f6c 100644
--- a/sys/amiga/amirip.c
+++ b/sys/amiga/amirip.c
@@ -28,20 +28,10 @@ static struct RastPort *rp;
 #undef NULL
 #define NULL 0
 
-#ifdef AZTEC_C
-#include <functions.h>
-#else
-#ifdef _DCC
-#include <clib/dos_protos.h>
-#include <clib/exec_protos.h>
-#include <clib/console_protos.h>
-#include <clib/diskfont_protos.h>
-#else
 #include <proto/dos.h>
 #include <proto/exec.h>
 #include <proto/console.h>
 #include <proto/diskfont.h>
-#endif
 
 static BitMapHeader tomb_bmhd;
 static struct BitMap *tombimg = NULL;
@@ -58,14 +48,8 @@ static int xoff, yoff; /* image centering */
 #undef red
 #undef green
 #undef blue
-#ifdef _DCC
-#include <clib/graphics_protos.h>
-#include <clib/intuition_protos.h>
-#else
 #include <proto/graphics.h>
 #include <proto/intuition.h>
-#endif
-#endif /* AZTEC_C */
 
 static struct Window *ripwin = 0;
 static void tomb_text(char *);
diff --git a/sys/amiga/amistack.c b/sys/amiga/amistack.c
index 690bea07c..50abff355 100644
--- a/sys/amiga/amistack.c
+++ b/sys/amiga/amistack.c
@@ -2,30 +2,15 @@
 /* Copyright (c) Janne Salmijärvi, Tampere, Finland, 2000		*/
 /* NetHack may be freely redistributed.  See license for details.	*/
 
-/*
- * Increase stack size to allow deep recursions.
- *
- * Note: This is SAS/C specific, using other compiler probably
- * requires another method for increasing stack.
- *
- */
-
-#ifdef __SASC_60
-#include <dos.h>
-#endif
-
 /*
  * Increase stack size to allow deep recursions.
  * NetHack 5.0 with Lua needs significantly more stack than 3.6.
+ *
+ * libnix needs __stkinit referenced to pull swapstack.o from libnix.a.
  */
 
-#ifdef __SASC_60
-long __stack = 256 * 1024;
-#else
-/* libnix needs __stkinit referenced to pull swapstack.o from libnix.a */
 unsigned long __stack = 256 * 1024;
 #ifdef CROSS_TO_AMIGA
 extern void __stkinit(void);
 void *__nh_force_stkinit = __stkinit;
 #endif
-#endif
diff --git a/sys/amiga/amitty.c b/sys/amiga/amitty.c
index 22036c8f5..e47f3b693 100644
--- a/sys/amiga/amitty.c
+++ b/sys/amiga/amitty.c
@@ -13,13 +13,6 @@
 #include <stdio.h>
 #include <proto/dos.h>
 
-#ifdef _DCC
-#define getch() getchar()
-#endif
-#ifdef __SASC_60
-#include <clib/dos_protos.h>
-#endif
-
 void tty_change_color(void);
 char *tty_get_color_string(void);
 
diff --git a/sys/amiga/amiwind.c b/sys/amiga/amiwind.c
index d931697b7..beaf3cb89 100644
--- a/sys/amiga/amiwind.c
+++ b/sys/amiga/amiwind.c
@@ -711,7 +711,6 @@ amii_cleanup(void)
 void
 Abort(long rc)
 {
-    int fault = 1;
 #ifdef CHDIR
     extern char orgdir[];
     chdir(orgdir);
@@ -724,38 +723,11 @@ Abort(long rc)
     } else
 #endif
         printf("\n\nAbort with alert code %08lx...\n", rc);
-/* Alert(rc);              this is too severe */
-#ifdef __SASC
-#ifdef INTUI_NEW_LOOK
-    if (IntuitionBase->LibNode.lib_Version >= 37) {
-        struct EasyStruct es = {
-            sizeof(struct EasyStruct), 0, "NetHack Panic Request",
-            "NetHack is Aborting with code == 0x%08lx",
-            "Continue Abort|Return to Program|Clean up and exit",
-        };
-        fault = EasyRequest(NULL, &es, NULL, (long) rc);
-        if (fault == 2)
-            return;
-    }
-#endif
-    if (fault == 1) {
-        /*  __emit(0x4afc); */ /* illegal instruction */
-        __emit(0x40fc);        /* divide by */
-        __emit(0x0000);        /*  #0  */
-        /* NOTE: don't move amii_cleanup() above here - */
-        /* it is too likely to kill the system     */
-        /* before it can get the SnapShot out, if  */
-        /* there is something really wrong.    */
-    }
-#endif
 #ifdef AMII_GRAPHICS
     if (windowprocs.win_init_nhwindows == amii_procs.win_init_nhwindows)
         amii_cleanup();
 #endif
 #undef exit
-#ifdef AZTEC_C
-    _abort();
-#endif
     exit((int) rc);
 }
 
diff --git a/sys/amiga/winami.c b/sys/amiga/winami.c
index e1276e986..c190a7c39 100644
--- a/sys/amiga/winami.c
+++ b/sys/amiga/winami.c
@@ -1161,17 +1161,7 @@ amii_display_file(const char *fn, boolean complain)
 
     if ((fp = dlb_fopen(fn, RDTMODE)) == (dlb *) NULL) {
         if (complain) {
-            sprintf(buf, "Can't display %s: %s", fn,
-#if defined(_DCC) || defined(__GNUC__)
-                    strerror(errno)
-#else
-#ifdef __SASC_60
-                    __sys_errlist[errno]
-#else
-                    sys_errlist[errno]
-#endif
-#endif
-                    );
+            sprintf(buf, "Can't display %s: %s", fn, strerror(errno));
             amii_addtopl(buf);
         }
         return;
diff --git a/sys/amiga/winchar.c b/sys/amiga/winchar.c
index 7e17ea574..c2281c914 100644
--- a/sys/amiga/winchar.c
+++ b/sys/amiga/winchar.c
@@ -7,9 +7,7 @@
 #include <exec/types.h>
 #include <libraries/iffparse.h>
 #include <graphics/scale.h>
-#ifndef _DCC
 #include <proto/iffparse.h>
-#endif
 
 #ifdef TESTING
 #include "hack.h"
diff --git a/sys/amiga/windefs.h b/sys/amiga/windefs.h
index cb6cbd3db..617c095f1 100644
--- a/sys/amiga/windefs.h
+++ b/sys/amiga/windefs.h
@@ -5,9 +5,6 @@
 #include <exec/types.h>
 #include <exec/memory.h>
 #include <exec/io.h>
-#if !defined(_DCC) && !defined(__GNUC__)
-#include <dos.h>
-#endif
 #include <exec/alerts.h>
 #include <exec/devices.h>
 #include <exec/execbase.h>
@@ -19,25 +16,10 @@
 #include <libraries/gadtools.h>
 #include <libraries/dosextens.h>
 #include <libraries/asl.h>
-/* stddef.h is included in the precompiled version of hack.h .  If we include
- * it here normally (through string.h) we'll get an "illegal typedef" later
- * on.  This is the easiest way I can think of to fix it without messing
- * around with the rest of the #includes.  --AMC
- */
-#if defined(_DCC) && !defined(HACK_H)
-#define ptrdiff_t ptrdiff_t_
-#define size_t size_t_
-#define wchar_t wchar_t_
-#endif
 #include <ctype.h>
 #undef strcmpi
 #include <string.h>
 #include <errno.h>
-#if defined(_DCC) && !defined(HACK_H)
-#undef ptrdiff_t
-#undef size_t
-#undef wchar_T
-#endif
 
 #ifdef IDCMP_CLOSEWINDOW
 #ifndef INTUI_NEW_LOOK
@@ -62,17 +44,6 @@ CLIPPING must be defined for the AMIGA version
 /*#define   TOPL_GETLINE	/* Don't use a window for getlin() */
 /*#define   WINDOW_YN		/* Use a window for y/n questions */
 
-#ifdef AZTEC_C
-#include <functions.h>
-#else
-#ifdef _DCC
-#include <clib/dos_protos.h>
-#include <clib/exec_protos.h>
-#include <clib/console_protos.h>
-#include <clib/layers_protos.h>
-#include <clib/diskfont_protos.h>
-#include <clib/gadtools_protos.h>
-#else
 #include <proto/dos.h>
 #include <proto/exec.h>
 #include <proto/console.h>
@@ -80,28 +51,13 @@ CLIPPING must be defined for the AMIGA version
 #include <proto/diskfont.h>
 #include <proto/gadtools.h>
 #include <proto/asl.h>
-#endif
 
 /* kludge - see amirip for why */
 #undef red
 #undef green
 #undef blue
-#ifdef _DCC
-#include <clib/graphics_protos.h>
-#else
 #include <proto/graphics.h>
-#endif
-
-#ifdef _DCC
-#define __asm /* DICE doesn't like __asm */
-#endif
-
-#ifdef _DCC
-#include <clib/intuition_protos.h>
-#else
 #include <proto/intuition.h>
-#endif
-#endif
 
 #ifdef SHAREDLIB
 #include "NH:sys/amiga/lib/libmacs.h"
diff --git a/sys/amiga/winfuncs.c b/sys/amiga/winfuncs.c
index 788964b77..aec3939c7 100644
--- a/sys/amiga/winfuncs.c
+++ b/sys/amiga/winfuncs.c
@@ -252,7 +252,6 @@ struct FillParams {
     WORD offsety;
 };
 
-#ifdef __GNUC__
 #ifdef __PPC__
 void PPC_LayerFillHook(void);
 struct EmulLibEntry LayerFillHook = { TRAP_LIB, 0,
@@ -281,16 +280,6 @@ void
 LayerFillHook_impl(struct Hook *hk, struct RastPort *rp,
                     struct FillParams *fp)
 {
-#endif
-#else
-void
-#ifndef _DCC
-    __interrupt
-#endif
-        __saveds __asm LayerFillHook(__a0 struct Hook *hk,
-                                     __a2 struct RastPort *rp,
-                                     __a1 struct FillParams *fp)
-{
 #endif
 
     long x, y, xmax, ymax;
@@ -828,7 +817,6 @@ amii_create_nhwindow(int type)
     return (newid);
 }
 
-#ifdef __GNUC__
 #ifdef __PPC__
 int PPC_SM_Filter(void);
 struct EmulLibEntry SM_Filter = { TRAP_LIB, 0,
@@ -857,16 +845,6 @@ int
 SM_Filter_impl(struct Hook *hk, ULONG modeID,
                struct ScreenModeRequester *smr)
 {
-#endif
-#else
-int
-#ifndef _DCC
-    __interrupt
-#endif
-        __saveds __asm SM_Filter(
-            __a0 struct Hook *hk, __a1 ULONG modeID,
-            __a2 struct ScreenModeRequester *smr)
-{
 #endif
     struct DimensionInfo dims;
     struct DisplayInfo disp;