diff --git a/src/Makefile.am b/src/Makefile.am
index 5b62127..a45f83c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -40,7 +40,7 @@ vid_icd2061.c vid_ics2595.c vid_incolor.c vid_mda.c vid_olivetti_m24.c vid_oti03
 vid_pc1512.c vid_pc1640.c vid_pcjr.c vid_ps1_svga.c vid_s3.c vid_s3_virge.c vid_sdac_ramdac.c vid_sigma.c \
 vid_stg_ramdac.c vid_svga.c vid_svga_render.c vid_t1000.c vid_t3100e.c vid_tandy.c vid_tandysl.c vid_tgui9440.c \
 vid_tkd8001_ramdac.c vid_tvga.c vid_unk_ramdac.c vid_vga.c vid_voodoo.c video.c wd76c10.c vid_wy700.c \
-x86seg.c x87.c xi8088.c xtide.c sound_dbopl.cc sound_resid.cc
+x86seg.c x87.c xi8088.c xtide.c zenith.c sound_dbopl.cc sound_resid.cc
 
 # DOSBox
 pcem_SOURCES += dosbox/cdrom_image.cpp dosbox/dbopl.cpp dosbox/nukedopl.cpp dosbox/vid_cga_comp.c
diff --git a/src/Makefile.linux32-wx-sdl2 b/src/Makefile.linux32-wx-sdl2
index 3656f1c..450a3e6 100644
--- a/src/Makefile.linux32-wx-sdl2
+++ b/src/Makefile.linux32-wx-sdl2
@@ -20,7 +20,7 @@ vid_icd2061.o vid_ics2595.o vid_incolor.o vid_mda.o vid_olivetti_m24.o vid_oti03
 vid_pc1512.o vid_pc1640.o vid_pcjr.o vid_ps1_svga.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o vid_sigma.o \
 vid_stg_ramdac.o vid_svga.o vid_svga_render.o vid_t1000.o vid_t3100e.o vid_tandy.o vid_tandysl.o vid_tgui9440.o \
 vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o vid_vga.o vid_voodoo.o vid_wy700.o video.o wd76c10.o \
-x86seg.o x87.o xi8088.c xtide.o sound_dbopl.o sound_resid.o \
+x86seg.o x87.o xi8088.c xtide.o zenith.o sound_dbopl.o sound_resid.o \
 wx-main.o wx-config_sel.o wx-dialogbox.o wx-utils.o wx-app.o wx-sdl2-joystick.o wx-sdl2-mouse.o wx-sdl2-keyboard.o wx-sdl2-video.o wx-sdl2-midi.o \
 wx-sdl2.o wx-config.o wx-deviceconfig.o wx-status.o wx-sdl2-status.o wx-resources.o wx-thread.o wx-common.o wx-sdl2-display.o \
 wx-sdl2-video-renderer.o wx-sdl2-video-gl3.o wx-glslp-parser.o wx-shader_man.o wx-shaderconfig.o wx-joystickconfig.o wx-createdisc.o
diff --git a/src/Makefile.linux64-wx-sdl2 b/src/Makefile.linux64-wx-sdl2
index c4b6f3a..dab01f4 100644
--- a/src/Makefile.linux64-wx-sdl2
+++ b/src/Makefile.linux64-wx-sdl2
@@ -20,7 +20,7 @@ vid_icd2061.o vid_ics2595.o vid_incolor.o vid_mda.o vid_olivetti_m24.o vid_oti03
 vid_pc1512.o vid_pc1640.o vid_pcjr.o vid_ps1_svga.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o vid_sigma.o \
 vid_stg_ramdac.o vid_svga.o vid_svga_render.o vid_t1000.o vid_t3100e.o vid_tandy.o vid_tandysl.o vid_tgui9440.o \
 vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o vid_vga.o vid_voodoo.o vid_wy700.o video.o wd76c10.o \
-x86seg.o x87.o xi8088.c xtide.o sound_dbopl.o sound_resid.o \
+x86seg.o x87.o xi8088.c xtide.o zenith.o sound_dbopl.o sound_resid.o \
 wx-main.o wx-config_sel.o wx-dialogbox.o wx-utils.o wx-app.o wx-sdl2-joystick.o wx-sdl2-mouse.o wx-sdl2-keyboard.o wx-sdl2-video.o wx-sdl2-midi.o \
 wx-sdl2.o wx-config.o wx-deviceconfig.o wx-status.o wx-sdl2-status.o wx-resources.o wx-thread.o wx-common.o wx-sdl2-display.o \
 wx-sdl2-video-renderer.o wx-sdl2-video-gl3.o wx-glslp-parser.o wx-shader_man.o wx-shaderconfig.o wx-joystickconfig.o wx-createdisc.o
diff --git a/src/Makefile.mingw-wx-sdl2 b/src/Makefile.mingw-wx-sdl2
index 91c1a7c..cbf8c22 100644
--- a/src/Makefile.mingw-wx-sdl2
+++ b/src/Makefile.mingw-wx-sdl2
@@ -24,7 +24,7 @@ OBJ = 386.o 386_dynarec.o 386_dynarec_ops.o 808x.o acc2036.o acer386sx.o ali1429
 	vid_vga.o vid_voodoo.o vid_wy700.o video.o wd76c10.o x86seg.o x87.o xi8088.c xtide.o win-midi.o \
 	wx-main.o wx-config_sel.o wx-dialogbox.o wx-utils.o wx-app.o wx-sdl2-joystick.o wx-sdl2-mouse.o wx-sdl2-keyboard.o wx-sdl2-video.o \
 	wx-sdl2.o wx-config.o wx-deviceconfig.o wx-status.o wx-sdl2-status.o wx-resources.o wx-thread.o wx-common.o wx-sdl2-display-win.o \
-	wx-sdl2-video-renderer.o wx-sdl2-video-gl3.o wx-glslp-parser.o wx-shader_man.o wx-shaderconfig.o wx-joystickconfig.o wx-createdisc.o wx.res
+	wx-sdl2-video-renderer.o wx-sdl2-video-gl3.o wx-glslp-parser.o wx-shader_man.o wx-shaderconfig.o wx-joystickconfig.o wx-createdisc.o zenith.o wx.res
 DBOBJ = cdrom_image.o dbopl.o nukedopl.o vid_cga_comp.o
 SIDOBJ = convolve.o convolve-sse.o envelope.o extfilt.o filter.o pot.o sid.o voice.o wave6581__ST.o wave6581_P_T.o wave6581_PS_.o wave6581_PST.o wave8580__ST.o wave8580_P_T.o wave8580_PS_.o wave8580_PST.o wave.o
 
diff --git a/src/Makefile.mingw-wx-sdl2-network b/src/Makefile.mingw-wx-sdl2-network
index b4421f8..41e90c3 100644
--- a/src/Makefile.mingw-wx-sdl2-network
+++ b/src/Makefile.mingw-wx-sdl2-network
@@ -21,7 +21,7 @@ OBJ = 386.o 386_dynarec.o 386_dynarec_ops.o 808x.o acc2036.o acer386sx.o ali1429
 	vid_olivetti_m24.o vid_oti037.c vid_oti067.o vid_paradise.o vid_pc1512.o vid_pc1640.o vid_pc200.o \
 	vid_pcjr.o vid_ps1_svga.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o vid_sigma.o vid_stg_ramdac.o vid_svga.o \
 	vid_svga_render.o vid_t1000.o vid_t3100e.o vid_tandy.o vid_tandysl.o vid_tgui9440.o vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o \
-	vid_vga.o vid_voodoo.o vid_wy700.o video.o wd76c10.o x86seg.o x87.o xi8088.c xtide.o win-midi.o \
+	vid_vga.o vid_voodoo.o vid_wy700.o video.o wd76c10.o x86seg.o x87.o xi8088.c xtide.o zenith.o win-midi.o \
 	wx-main.o wx-config_sel.o wx-dialogbox.o wx-utils.o wx-app.o wx-sdl2-joystick.o wx-sdl2-mouse.o wx-sdl2-keyboard.o wx-sdl2-video.o \
 	wx-sdl2.o wx-config.o wx-deviceconfig.o wx-hostconfig.o wx-status.o wx-sdl2-status.o wx-resources.o wx-thread.o wx-common.o wx-sdl2-display-win.o \
 	wx-sdl2-video-renderer.o wx-sdl2-video-gl3.o wx-glslp-parser.o wx-shader_man.o wx-shaderconfig.o wx-joystickconfig.o wx-createdisc.o wx.res
diff --git a/src/Makefile.osx64-wx-sdl2 b/src/Makefile.osx64-wx-sdl2
index 3587ce3..b0b3445 100644
--- a/src/Makefile.osx64-wx-sdl2
+++ b/src/Makefile.osx64-wx-sdl2
@@ -19,7 +19,7 @@ vid_icd2061.o vid_ics2595.o vid_incolor.o vid_mda.o vid_olivetti_m24.o vid_oti03
 vid_pc1512.o vid_pc1640.o vid_pcjr.o vid_ps1_svga.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o vid_sigma.o \
 vid_stg_ramdac.o vid_svga.o vid_svga_render.o vid_t1000.o vid_t3100e.o vid_tandy.o vid_tandysl.o vid_tgui9440.o \
 vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o vid_vga.o vid_voodoo.o vid_wy700.o video.o wd76c10.o \
-x86seg.o x87.o xi8088.c xtide.o sound_dbopl.o sound_resid.o \
+x86seg.o x87.o xi8088.c xtide.o zenith.o sound_dbopl.o sound_resid.o \
 wx-main.o wx-config_sel.o wx-dialogbox.o wx-utils.o wx-app.o wx-sdl2-joystick.o wx-sdl2-mouse.o wx-sdl2-keyboard.o wx-sdl2-video.o wx-sdl2-midi.o \
 wx-sdl2.o wx-config.o wx-deviceconfig.o wx-status.o wx-sdl2-status.o wx-resources.o wx-thread.o wx-common.o wx-sdl2-display.o \
 wx-sdl2-video-renderer.o wx-sdl2-video-gl3.o wx-glslp-parser.o wx-shader_man.o wx-shaderconfig.o wx-joystickconfig.o wx-createdisc.o
diff --git a/src/ibm.h b/src/ibm.h
index 177c923..110b755 100644
--- a/src/ibm.h
+++ b/src/ibm.h
@@ -465,6 +465,7 @@ enum
 	ROM_IBMPS2_M70_TYPE3,
 	ROM_IBMPS2_M70_TYPE4,
 	ROM_TULIP_TC7,
+	ROM_ZD_SUPERS,   /* [8088] Zenith Data Systems SupersPort */
                 	
         ROM_MAX
 };
diff --git a/src/mem_bios.c b/src/mem_bios.c
index f258602..0df10e6 100644
--- a/src/mem_bios.c
+++ b/src/mem_bios.c
@@ -950,6 +950,13 @@ int loadbios()
                 biosmask = 0x7fff;
                 return 1;
 				
+                case ROM_ZD_SUPERS:  /* [8088] Zenith Data Systems SupersPort */
+                f=romfopen("zdsupers/z184m v3.1d.10d","rb");
+                if (!f) break;
+                romfread(rom, 32768, 1, f);
+                fclose(f);
+                biosmask = 0x7fff;
+                return 1;
         }
         printf("Failed to load ROM!\n");
         if (f) fclose(f);
diff --git a/src/model.c b/src/model.c
index b5af7e1..dc15b0a 100644
--- a/src/model.c
+++ b/src/model.c
@@ -63,6 +63,7 @@
 #include "vid_t1000.h"
 #include "wd76c10.h"
 #include "xi8088.h"
+#include "zenith.h"
 
 void             xt_init();
 void           pcjr_init();
@@ -108,6 +109,7 @@ void      at_pb520r_init();
 void       at_pb570_init();
 void     compaq_pip_init();
 void      xt_xi8088_init();
+void      xt_zenith_init();
 int model;
 
 int AMSTRAD, AT, PCI, TANDY;
@@ -131,6 +133,7 @@ MODEL models[] =
         {"[8088] Thomson TO16 PC",        ROM_TO16_PC,          "to16_pc",        { {"",      cpus_8088},        {"",    NULL},         {"",      NULL}},        MODEL_GFX_NONE,                                                  512,  640, 128,             xt_init, NULL},
         {"[8088] Toshiba T1000",          ROM_T1000,            "t1000",          { {"",      cpus_8088},        {"",    NULL},         {"",      NULL}},        MODEL_GFX_FIXED,                                                 512, 1280, 768,       xt_t1000_init, &t1000_device},
         {"[8088] VTech Laser Turbo XT",   ROM_LTXT,             "ltxt",           { {"",      cpus_8088},        {"",    NULL},         {"",      NULL}},        MODEL_GFX_NONE,                                                   64, 1152,  64,     xt_laserxt_init, NULL},
+        {"[8088] Zenith Data SupersPort", ROM_ZD_SUPERS,        "zdsupers",       { {"",      cpus_8088},        {"",    NULL},         {"",      NULL}},        MODEL_GFX_NONE,                                                  128,  640, 128,      xt_zenith_init, NULL},
         {"[8088] Xi8088",                 ROM_XI8088,           "xi8088",         { {"",      cpus_8088},        {"",    NULL},         {"",      NULL}},        MODEL_GFX_NONE|MODEL_AT|MODEL_PS2,                                64, 1024, 128,      xt_xi8088_init, &xi8088_device},
 
         {"[8086] Amstrad PC1512",         ROM_PC1512,           "pc1512",         { {"",      cpus_pc1512},      {"",    NULL},         {"",      NULL}},        MODEL_GFX_FIXED|MODEL_AMSTRAD,                                   512,  640, 128,            ams_init, NULL},
@@ -377,6 +380,22 @@ void xt_laserxt_init()
         laserxt_init();
 }
 
+void xt_zenith_init() /* [8088] Zenith Data Systems SupersPort */
+{
+        dma_init();
+        fdc_add();
+        lpt_init();
+        lpt2_remove(); /* only one parallel port */
+        pic_init();
+        pit_init();
+        serial1_init(0x3f8, 4); /* only one serial port */
+        mem_add_bios();
+        device_add(&zenith_scratchpad_device);
+        pit_set_out_func(&pit, 1, pit_refresh_timer_xt);
+        keyboard_xt_init();
+        nmi_init();
+}
+
 void xt_xi8088_init()
 {
         /* TODO: set UMBs? See if PCem always sets when we have > 640KB ram and avoids conflicts when a peripheral uses the same memory space */
diff --git a/src/zenith.c b/src/zenith.c
new file mode 100644
index 0000000..f7f361b
--- /dev/null
+++ b/src/zenith.c
@@ -0,0 +1,50 @@
+#include <stdlib.h>
+#include "ibm.h"
+#include "device.h"
+#include "mem.h"
+#include "zenith.h"
+
+static uint8_t *zenith_scratchpad_ram;
+static mem_mapping_t zenith_scratchpad_mapping;
+
+static uint8_t zenith_scratchpad_read(uint32_t addr, void *p)
+{
+        return zenith_scratchpad_ram[addr & 0x3fff];
+}
+static void zenith_scratchpad_write(uint32_t addr, uint8_t val, void *p)
+{
+        zenith_scratchpad_ram[addr & 0x3fff] = val;
+}
+
+static void *zenith_scratchpad_init()
+{
+        zenith_scratchpad_ram = malloc(0x4000);
+
+        mem_mapping_disable(&bios_mapping[4]);
+        mem_mapping_disable(&bios_mapping[5]);
+        
+        mem_mapping_add(&zenith_scratchpad_mapping, 0xf0000, 0x4000,
+                        zenith_scratchpad_read, NULL, NULL,
+                        zenith_scratchpad_write, NULL, NULL,
+                        zenith_scratchpad_ram,  MEM_MAPPING_EXTERNAL, NULL);
+
+        return zenith_scratchpad_ram;
+}
+
+static void zenith_scratchpad_close(void *p)
+{
+        free(p);
+}
+
+device_t zenith_scratchpad_device =
+{
+        "Zenith scratchpad RAM",
+        0,
+        zenith_scratchpad_init,
+        zenith_scratchpad_close,
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        NULL
+};
diff --git a/src/zenith.h b/src/zenith.h
new file mode 100644
index 0000000..0e58f45
--- /dev/null
+++ b/src/zenith.h
@@ -0,0 +1 @@
+device_t zenith_scratchpad_device;