PDP11, PDP1, TX-0: Added SDL based graphics support using sim_video.

Both VT11 and VS60 properly autoconfigure on the PDP11.
PDP11 now runs Lunar Lander on all SDL supported platforms.
Reworked refresh logic to not require internal delays in the display library

makefile

@@ -56,35 +56,32 @@ ifeq (old,$(shell gmake --version /dev/null 2>&1 | grep 'GNU Make' | awk '{ if (
   $(warning *** Warning *** GNU Make Version $(GMAKE_VERSION) is too old to)
   $(warning *** Warning *** fully process this makefile)
 endif
-# building the pdp11, or any vax simulator could use networking support
 BUILD_SINGLE := $(MAKECMDGOALS) $(BLANK_SUFFIX)
+# building the pdp1, pdp11, tx-0, or any microvax simulator could use video support
+ifneq (,$(or $(findstring XXpdp1XX,$(addsuffix XX,$(addprefix XX,$(MAKECMDGOALS)))),$(findstring pdp11,$(MAKECMDGOALS)),$(findstring tx-0,$(MAKECMDGOALS)),$(findstring microvax1,$(MAKECMDGOALS)),$(findstring microvax2,$(MAKECMDGOALS)),$(findstring microvax3900,$(MAKECMDGOALS)),$(findstring XXvaxXX,$(addsuffix XX,$(addprefix XX,$(MAKECMDGOALS))))))
+  VIDEO_USEFUL = true
+endif
+# building the besm6 needs both video support and fontfile support
+ifneq (,$(findstring besm6,$(MAKECMDGOALS)))
+  VIDEO_USEFUL = true
+  BESM6_BUILD = true
+endif
+# building the pdp11, or any vax simulator could use networking support
 ifneq (,$(or $(findstring pdp11,$(MAKECMDGOALS)),$(findstring vax,$(MAKECMDGOALS)),$(findstring all,$(MAKECMDGOALS))))
   NETWORK_USEFUL = true
-  ifneq (,$(or $(findstring microvax1,$(MAKECMDGOALS)),$(findstring microvax2,$(MAKECMDGOALS)),$(findstring microvax3900,$(MAKECMDGOALS)),$(findstring XXvaxXX,$(addsuffix XX,$(addprefix XX,$(MAKECMDGOALS))))))
-    VIDEO_USEFUL = true
-  endif
   ifneq (,$(findstring all,$(MAKECMDGOALS))$(word 2,$(MAKECMDGOALS)))
     BUILD_MULTIPLE = s
     VIDEO_USEFUL = true
+    BESM6_BUILD = true
   endif
-  ifneq (,$(findstring pdp11,$(MAKECMDGOALS))$(findstring all,$(MAKECMDGOALS)))
-    DISPLAY_USEFUL = true
-  endif
-else ifneq (,$(findstring besm6,$(MAKECMDGOALS)))
-  VIDEO_USEFUL = true
-  BESM6_BUILD = true
 else
   ifeq ($(MAKECMDGOALS),)
     # default target is all
     NETWORK_USEFUL = true
     VIDEO_USEFUL = true
-    DISPLAY_USEFUL = true
     BUILD_MULTIPLE = s
     BUILD_SINGLE := all $(BUILD_SINGLE)
-  else
-    ifneq (,$(or $(or $(findstring pdp1,$(MAKECMDGOALS)),$(findstring pdp11,$(MAKECMDGOALS))),$(findstring tx-0,$(MAKECMDGOALS))))
-      DISPLAY_USEFUL = true
-    endif
+    BESM6_BUILD = true
   endif
 endif
 find_lib = $(abspath $(strip $(firstword $(foreach dir,$(strip $(LIBPATH)),$(wildcard $(dir)/lib$(1).$(LIBEXT))))))
@@ -427,9 +424,12 @@ ifeq ($(WIN32),)  #*nix Environments (&& cygwin)
     endif
     ifneq (,$(call find_include,SDL2/SDL))
       ifneq (,$(call find_lib,SDL2))
-        VIDEO_CCDEFS += -DHAVE_LIBSDL -I$(dir $(call find_include,SDL2/SDL))
+        VIDEO_CCDEFS += -DHAVE_LIBSDL -DUSE_SIM_VIDEO -I$(dir $(call find_include,SDL2/SDL))
         VIDEO_LDFLAGS += -lSDL2
         VIDEO_FEATURES = - video capabilities provided by libSDL2 (Simple Directmedia Layer)
+        DISPLAYL = ${DISPLAYD}/display.c $(DISPLAYD)/sim_ws.c
+        DISPLAYVT = ${DISPLAYD}/vt11.c
+        DISPLAY_OPT += -DUSE_DISPLAY $(VIDEO_CCDEFS) $(VIDEO_LDFLAGS)
         $(info using libSDL2: $(call find_lib,SDL2) $(call find_include,SDL2/SDL))
         ifeq (Darwin,$(OSTYPE))
           VIDEO_LDFLAGS += -lobjc -framework cocoa -DSDL_MAIN_AVAILABLE
@@ -438,9 +438,12 @@ ifeq ($(WIN32),)  #*nix Environments (&& cygwin)
     else
       ifneq (,$(call find_include,SDL/SDL))
         ifneq (,$(call find_lib,SDL))
-          VIDEO_CCDEFS += -DHAVE_LIBSDL -I$(dir $(call find_include,SDL/SDL))
+          VIDEO_CCDEFS += -DHAVE_LIBSDL -DUSE_SIM_VIDEO -I$(dir $(call find_include,SDL/SDL))
           VIDEO_LDFLAGS += -lSDL
           VIDEO_FEATURES = - video capabilities provided by libSDL (Simple Directmedia Layer)
+          DISPLAYL = ${DISPLAYD}/display.c $(DISPLAYD)/sim_ws.c
+          DISPLAYVT = ${DISPLAYD}/vt11.c
+          DISPLAY_OPT += -DUSE_DISPLAY $(VIDEO_CCDEFS) $(VIDEO_LDFLAGS)
           $(info using libSDL: $(call find_lib,SDL) $(call find_include,SDL/SDL))
           ifeq (Darwin,$(OSTYPE))
             VIDEO_LDFLAGS += -lobjc -framework cocoa -DSDL_MAIN_AVAILABLE
@@ -461,27 +464,6 @@ ifeq ($(WIN32),)  #*nix Environments (&& cygwin)
       $(info *** Info ***)
     endif
   endif
-  ifneq (,$(DISPLAY_USEFUL))
-    ifeq (,$(WIN32))
-      ifneq (,$(call find_include,X11/Intrinsic))
-        ifneq (,$(call find_lib,Xt))
-          DISPLAYL = ${DISPLAYD}/display.c $(DISPLAYD)/x11.c
-          DISPLAYVT = ${DISPLAYD}/vt11.c
-          DISPLAY_OPT += -DUSE_DISPLAY -I$(dir $(call find_include,X11/Intrinsic))/include -lXt -lX11 -lm
-          $(info using display: $(call find_lib,Xt) $(call find_include,X11/Intrinsic))
-        endif
-        ifneq (,$(GCC_WARNINGS_CMD)$(CLANG_VERSION))
-          ifneq (,$(CLANG_VERSION)$(findstring -Wdeprecated-declarations,$(shell $(GCC_WARNINGS_CMD))))
-            DISPLAY_OPT += -Wno-deprecated-declarations
-          endif
-        endif
-      endif
-    else
-      DISPLAYL = ${DISPLAYD}/display.c $(DISPLAYD)/win32.c
-      DISPLAYVT = ${DISPLAYD}/vt11.c
-      DISPLAY_OPT = -DUSE_DISPLAY -lgdi32
-    endif
-  endif
   ifneq (,$(NETWORK_USEFUL))
     ifneq (,$(call find_include,pcap))
       ifneq (,$(shell grep 'pcap/pcap.h' $(call find_include,pcap) | grep include))
@@ -926,10 +908,13 @@ DISPLAYD = display
 # Emulator source files and compile time options
 #
 PDP1D = PDP1
+ifneq (,$(DISPLAY_OPT))
+  PDP1_DISPLAY_OPT = -DDISPLAY_TYPE=DIS_TYPE30 -DPIX_SCALE=RES_HALF
+endif
 PDP1 = ${PDP1D}/pdp1_lp.c ${PDP1D}/pdp1_cpu.c ${PDP1D}/pdp1_stddev.c \
 	${PDP1D}/pdp1_sys.c ${PDP1D}/pdp1_dt.c ${PDP1D}/pdp1_drm.c \
 	${PDP1D}/pdp1_clk.c ${PDP1D}/pdp1_dcs.c ${PDP1D}/pdp1_dpy.c ${DISPLAYL}
-PDP1_OPT = -I ${PDP1D} $(DISPLAY_OPT)
+PDP1_OPT = -I ${PDP1D} $(DISPLAY_OPT) $(PDP1_DISPLAY_OPT)
 
 
 NOVAD = NOVA