diff --git a/src/Makefile b/src/Makefile
index 9518942b2..929612271 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -98,7 +98,6 @@ ALL_SYSTEMS=\
 	MINGW64\
 	HAIKU\
 	DUMMY\
-	DJGPPDOS\
 	MINGW\
 	UNIX\
 	LINUX\
@@ -622,8 +621,6 @@ asm:
 	$(REMOVE) $(OBJDIR)/tmp.exe
 
 # executable
-# NOTE: DJGPP's objcopy do not have --add-gnu-debuglink
-
 $(BIN)/$(EXENAME): $(POS) $(OBJS)
 	-$(MKDIR) $(BIN)
 	$(call echo,Linking $(EXENAME)...)
diff --git a/src/d_main.h b/src/d_main.h
index 81de0634d..4e5df87e3 100644
--- a/src/d_main.h
+++ b/src/d_main.h
@@ -40,10 +40,6 @@ void D_SRB2Main(void);
 
 // Called by IO functions when input is detected.
 void D_PostEvent(const event_t *ev);
-#if defined (PC_DOS) && !defined (DOXYGEN)
-void D_PostEvent_end(void);    // delimiter for locking memory
-#endif
-
 void D_ProcessEvents(void);
 
 const char *D_Home(void);
diff --git a/src/d_netfil.c b/src/d_netfil.c
index 8f661bb5f..4729eb09d 100644
--- a/src/d_netfil.c
+++ b/src/d_netfil.c
@@ -15,7 +15,7 @@
 
 #include <time.h>
 
-#if defined (_WIN32) || defined (__DJGPP__)
+#ifdef _WIN32
 #include <io.h>
 #include <direct.h>
 #else
@@ -30,10 +30,6 @@
 #elif defined (_WIN32)
 #include <sys/utime.h>
 #endif
-#ifdef __DJGPP__
-#include <dir.h>
-#include <utime.h>
-#endif
 
 #include "doomdef.h"
 #include "doomstat.h"
diff --git a/src/doomdef.h b/src/doomdef.h
index 52abc9597..5f36f2d69 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -100,7 +100,7 @@
 #include <sys/stat.h>
 #include <ctype.h>
 
-#if defined (_WIN32) || defined (__DJGPP__)
+#ifdef _WIN32
 #include <io.h>
 #endif
 
diff --git a/src/doomtype.h b/src/doomtype.h
index 950f50856..ffaa540b1 100644
--- a/src/doomtype.h
+++ b/src/doomtype.h
@@ -54,17 +54,6 @@ typedef long ssize_t;
 		#define PDWORD_PTR PDWORD
 	#endif
 #endif
-#elif defined (__DJGPP__)
-#define UINT8 unsigned char
-#define SINT8 signed char
-
-#define UINT16 unsigned short int
-#define INT16 signed short int
-
-#define INT32 signed long
-#define UINT32 unsigned long
-#define INT64  signed long long
-#define UINT64 unsigned long long
 #else
 #define __STDC_LIMIT_MACROS
 #include <stdint.h>
@@ -136,7 +125,7 @@ char *strcasestr(const char *in, const char *what);
 	#endif
 #endif //macintosh
 
-#if defined (PC_DOS) || defined (_WIN32) || defined (__HAIKU__)
+#if defined (_WIN32) || defined (__HAIKU__)
 #define HAVE_DOSSTR_FUNCS
 #endif
 
diff --git a/src/i_addrinfo.c b/src/i_addrinfo.c
index e77774549..ff0dfbd32 100644
--- a/src/i_addrinfo.c
+++ b/src/i_addrinfo.c
@@ -20,7 +20,7 @@
 #else
 #include <winsock.h>
 #endif
-#elif !defined (__DJGPP__)
+#else
 #include <sys/socket.h>
 #include <arpa/inet.h>
 #include <netdb.h>
diff --git a/src/i_tcp.c b/src/i_tcp.c
index ab8a69a9f..a9f617dc9 100644
--- a/src/i_tcp.c
+++ b/src/i_tcp.c
@@ -107,15 +107,6 @@
 		#endif
 	#endif // USE_WINSOCK
 
-	#ifdef __DJGPP__
-		#ifdef WATTCP // Alam_GBC: Wattcp may need this
-			#include <tcp.h>
-			#define strerror strerror_s
-		#else // wattcp
-			#include <lsck/lsck.h>
-		#endif // libsocket
-	#endif // djgpp
-
 	typedef union
 	{
 		struct sockaddr     any;
@@ -149,25 +140,15 @@
 
 #include "doomstat.h"
 
-// win32 or djgpp
-#if defined (USE_WINSOCK) || defined (__DJGPP__)
+// win32
+#ifdef USE_WINSOCK
 	// winsock stuff (in winsock a socket is not a file)
 	#define ioctl ioctlsocket
 	#define close closesocket
 #endif
 
 #include "i_addrinfo.h"
-
-#ifdef __DJGPP__
-
-#ifdef WATTCP
 #define SELECTTEST
-#endif
-
-#else
-#define SELECTTEST
-#endif
-
 #define DEFAULTPORT "5029"
 
 #if defined (USE_WINSOCK) && !defined (NONET)
@@ -184,7 +165,7 @@
 
 #ifndef NONET
 	// define socklen_t in DOS/Windows if it is not already defined
-	#if (defined (WATTCP) && !defined (__libsocket_socklen_t)) || defined (USE_WINSOCK1)
+	#ifdef USE_WINSOCK1
 		typedef int socklen_t;
 	#endif
 	static SOCKET_TYPE mysockets[MAXNETNODES+1] = {ERRSOCKET};
@@ -207,19 +188,6 @@ static const char *serverport_name = DEFAULTPORT;
 static const char *clientport_name;/* any port */
 
 #ifndef NONET
-
-#ifdef WATTCP
-static void wattcp_outch(char s)
-{
-	static char old = '\0';
-	char pr[2] = {s,0};
-	if (s == old && old == ' ') return;
-	else old = s;
-	if (s == '\r') CONS_Printf("\n");
-	else if (s != '\n') CONS_Printf(pr);
-}
-#endif
-
 #ifdef USE_WINSOCK
 // stupid microsoft makes things complicated
 static char *get_WSAErrorStr(int e)
@@ -764,11 +732,7 @@ static SOCKET_TYPE UDP_Bind(int family, struct sockaddr *addr, socklen_t addrlen
 	int opt;
 	socklen_t opts;
 #ifdef FIONBIO
-#ifdef WATTCP
-	char trueval = true;
-#else
 	unsigned long trueval = true;
-#endif
 #endif
 	mysockaddr_t straddr;
 	struct sockaddr_in sin;
@@ -1138,61 +1102,7 @@ boolean I_InitTcpDriver(void)
 		CONS_Debug(DBG_NETPLAY, "WinSock description: %s\n",WSAData.szDescription);
 		CONS_Debug(DBG_NETPLAY, "WinSock System Status: %s\n",WSAData.szSystemStatus);
 #endif
-#ifdef __DJGPP__
-#ifdef WATTCP // Alam_GBC: survive bootp, dhcp, rarp and wattcp/pktdrv from failing to load
-		survive_eth   = 1; // would be needed to not exit if pkt_eth_init() fails
-		survive_bootp = 1; // ditto for BOOTP
-		survive_dhcp  = 1; // ditto for DHCP/RARP
-		survive_rarp  = 1;
-		//_watt_do_exit = false;
-		//_watt_handle_cbreak = false;
-		//_watt_no_config = true;
-		_outch = wattcp_outch;
-		init_misc();
-//#ifdef DEBUGFILE
-		dbug_init();
-//#endif
-		switch (sock_init())
-		{
-			case 0:
-				init_tcp_driver = true;
-				break;
-			case 3:
-				CONS_Debug(DBG_NETPLAY, "No packet driver detected\n");
-				break;
-			case 4:
-				CONS_Debug(DBG_NETPLAY, "Error while talking to packet driver\n");
-				break;
-			case 5:
-				CONS_Debug(DBG_NETPLAY, "BOOTP failed\n");
-				break;
-			case 6:
-				CONS_Debug(DBG_NETPLAY, "DHCP failed\n");
-				break;
-			case 7:
-				CONS_Debug(DBG_NETPLAY, "RARP failed\n");
-				break;
-			case 8:
-				CONS_Debug(DBG_NETPLAY, "TCP/IP failed\n");
-				break;
-			case 9:
-				CONS_Debug(DBG_NETPLAY, "PPPoE login/discovery failed\n");
-				break;
-			default:
-				CONS_Debug(DBG_NETPLAY, "Unknown error with TCP/IP stack\n");
-				break;
-		}
-		hires_timer(0);
-#else // wattcp
-		if (__lsck_init())
-			init_tcp_driver = true;
-		else
-			CONS_Debug(DBG_NETPLAY, "No TCP/IP driver detected\n");
-#endif // libsocket
-#endif // __DJGPP__
-#ifndef __DJGPP__
 		init_tcp_driver = true;
-#endif
 	}
 #endif
 	if (!tcp_was_up && init_tcp_driver)
@@ -1217,10 +1127,8 @@ static void SOCK_CloseSocket(void)
 		if (mysockets[i] != (SOCKET_TYPE)ERRSOCKET
 		 && FD_ISSET(mysockets[i], &masterset))
 		{
-#if !defined (__DJGPP__) || defined (WATTCP)
 			FD_CLR(mysockets[i], &masterset);
 			close(mysockets[i]);
-#endif
 		}
 		mysockets[i] = ERRSOCKET;
 	}
@@ -1237,14 +1145,6 @@ void I_ShutdownTcpDriver(void)
 	WS_addrinfocleanup();
 	WSACleanup();
 #endif
-#ifdef __DJGPP__
-#ifdef WATTCP // wattcp
-	//_outch = NULL;
-	sock_exit();
-#else
-	__lsck_uninit();
-#endif // libsocket
-#endif // __DJGPP__
 	CONS_Printf("shut down\n");
 	init_tcp_driver = false;
 #endif
diff --git a/src/m_fixed.h b/src/m_fixed.h
index 289ca442a..f634028c7 100644
--- a/src/m_fixed.h
+++ b/src/m_fixed.h
@@ -71,7 +71,7 @@ FUNCMATH FUNCINLINE static ATTRINLINE fixed_t FloatToFixed(float f)
 		value   [eax]       \
 		modify exact [eax edx]
 #elif defined (__GNUC__) && defined (__i386__) && !defined (NOASM)
-	// DJGPP, i386 linux, cygwin or mingw
+	// i386 linux, cygwin or mingw
 	FUNCMATH FUNCINLINE static inline fixed_t FixedMul(fixed_t a, fixed_t b) // asm
 	{
 		fixed_t ret;
diff --git a/src/m_misc.c b/src/m_misc.c
index ad2d133ab..a9defab3c 100644
--- a/src/m_misc.c
+++ b/src/m_misc.c
@@ -64,8 +64,6 @@ typedef off_t off64_t;
 #define PRIdS "u"
 #elif defined (_WIN32)
 #define PRIdS "Iu"
-#elif defined (DJGPP)
-#define PRIdS "u"
 #else
 #define PRIdS "zu"
 #endif
diff --git a/src/s_sound.c b/src/s_sound.c
index 392a5b453..7f644b12c 100644
--- a/src/s_sound.c
+++ b/src/s_sound.c
@@ -1033,11 +1033,9 @@ void S_SetSfxVolume(INT32 volume)
 
 void S_ClearSfx(void)
 {
-#ifndef DJGPPDOS
 	size_t i;
 	for (i = 1; i < NUMSFX; i++)
 		I_FreeSfx(S_sfx + i);
-#endif
 }
 
 static void S_StopChannel(INT32 cnum)