diff --git a/src/chipset/opti283.c b/src/chipset/opti283.c
new file mode 100644
index 000000000..a4dad3d29
--- /dev/null
+++ b/src/chipset/opti283.c
@@ -0,0 +1,175 @@
+/*
+ * 86Box	A hypervisor and IBM PC system emulator that specializes in
+ *		running old operating systems and software designed for IBM
+ *		PC systems and compatibles from 1981 through fairly recent
+ *		system designs based on the PCI bus.
+ *
+ *		This file is part of the 86Box distribution.
+ *
+ *		Implementation of the OPTi 82C283 chipset.
+ *
+ *
+ *
+ *      Authors: Tiseno100
+ *
+ *		Copyright 2020 Tiseno100
+ *
+ */
+
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#define HAVE_STDARG_H
+#include <86box/86box.h>
+#include "cpu.h"
+#include <86box/timer.h>
+#include <86box/io.h>
+#include <86box/device.h>
+#include <86box/keyboard.h>
+#include <86box/mem.h>
+#include <86box/fdd.h>
+#include <86box/fdc.h>
+#include <86box/port_92.h>
+#include <86box/chipset.h>
+
+typedef struct
+{
+    uint8_t	index,
+	regs[256];
+} opti283_t;
+
+static void opti283_shadow_recalc(opti283_t *dev)
+{
+uint32_t base;
+uint32_t shflags, i = 0;
+
+shadowbios = 0;
+shadowbios_write = 0;
+
+    /* F0000 - FFFFF segmentation */
+if(!(dev->regs[0x11] & 0x80)){
+        shadowbios = 1;
+        shadowbios_write = 0;
+        mem_set_mem_state(0xf0000, 0x10000, MEM_READ_INTERNAL | MEM_WRITE_DISABLED);
+} else {
+        shadowbios = 0;
+        shadowbios_write = 1;
+        mem_set_mem_state(0xf0000, 0x10000, MEM_READ_EXTANY | MEM_WRITE_INTERNAL);
+}
+
+    /* C0000 - CFFFF segmentation */
+for(i = 4; i < 8; i++){
+    base = 0xc0000 + ((i-4) << 14);
+
+    if((dev->regs[0x13] & (1 << i)) & (dev->regs[0x11] & 0x10)){
+        shflags = MEM_READ_INTERNAL;
+        shflags |= (!(dev->regs[0x11] & 0x01)) ? MEM_WRITE_INTERNAL : MEM_WRITE_DISABLED;
+        mem_set_mem_state_both(base, 0x4000, shflags);
+    } else {
+        mem_set_mem_state_both(base, 0x4000, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
+}
+}
+
+    /* D0000 - DFFFF segmentation */
+for(i = 0; i < 4; i++){
+    base = 0xd0000 + (i << 14);
+    if((dev->regs[0x12] & (1 << i)) & (dev->regs[0x11] & 0x20)){
+        shflags = MEM_READ_INTERNAL;
+        shflags |= (!(dev->regs[0x11] & 0x02)) ? MEM_WRITE_INTERNAL : MEM_WRITE_DISABLED;
+        mem_set_mem_state(base, 0x4000, shflags);
+    } else mem_set_mem_state(base, 0x4000, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
+}
+
+    /* E0000 - EFFFF segmentation */
+for(i = 4; i < 8; i++){
+    base = 0xe0000 + ((i-4) << 14);
+    if((dev->regs[0x12] & (1 << i)) & (dev->regs[0x11] & 0x40)){
+        shflags = MEM_READ_INTERNAL;
+        shflags |= (!(dev->regs[0x11] & 0x04)) ? MEM_WRITE_INTERNAL : MEM_WRITE_DISABLED;
+        mem_set_mem_state(base, 0x4000, shflags);
+    } else mem_set_mem_state(base, 0x4000, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
+}
+
+}
+
+static void
+opti283_write(uint16_t addr, uint8_t val, void *priv)
+{
+    opti283_t *dev = (opti283_t *) priv;
+
+    switch (addr) {
+	case 0x22:
+		dev->index = val;
+		break;
+	case 0x24:
+        /*pclog("OPTi 283: dev->regs[%02x] = %02x\n", dev->index, val);*/
+		dev->regs[dev->index] = val;
+
+        switch(dev->index){
+            case 0x10:
+            cpu_update_waitstates();
+
+            case 0x11:
+            case 0x12:
+            case 0x13:
+            opti283_shadow_recalc(dev);
+            break;
+        }
+		break;
+    }
+}
+
+
+static uint8_t
+opti283_read(uint16_t addr, void *priv)
+{
+    uint8_t ret = 0xff;
+    opti283_t *dev = (opti283_t *) priv;
+
+    switch (addr) {
+	case 0x24:
+		ret = dev->regs[dev->index];
+		break;
+    }
+
+    return ret;
+}
+
+
+static void
+opti283_close(void *priv)
+{
+    opti283_t *dev = (opti283_t *) priv;
+
+    free(dev);
+}
+
+
+static void *
+opti283_init(const device_t *info)
+{
+    opti283_t *dev = (opti283_t *) malloc(sizeof(opti283_t));
+    memset(dev, 0, sizeof(opti283_t));
+
+    io_sethandler(0x022, 0x0001, opti283_read, NULL, NULL, opti283_write, NULL, NULL, dev);
+    io_sethandler(0x024, 0x0001, opti283_read, NULL, NULL, opti283_write, NULL, NULL, dev);
+
+    dev->regs[0x10] = 0x3f;
+    dev->regs[0x11] = 0xf0;
+    opti283_shadow_recalc(dev);
+    
+    return dev;
+}
+
+
+const device_t opti283_device = {
+    "OPTi 82C283",
+    0,
+    0,
+    opti283_init, opti283_close, NULL,
+    NULL, NULL, NULL,
+    NULL
+};
diff --git a/src/include/86box/chipset.h b/src/include/86box/chipset.h
index de25fca32..c2e4b8fe0 100644
--- a/src/include/86box/chipset.h
+++ b/src/include/86box/chipset.h
@@ -60,6 +60,7 @@ extern const device_t	slc90e66_device;
 extern const device_t	ioapic_device;
 
 /* OPTi */
+extern const device_t	opti283_device;
 extern const device_t	opti493_device;
 extern const device_t	opti495_device;
 extern const device_t	opti802g_device;
diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index fc423786a..055679bac 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -252,6 +252,8 @@ extern int	machine_at_asus386_init(const machine_t *);
 extern int  machine_at_ecs386_init(const machine_t *);
 extern int	machine_at_micronics386_init(const machine_t *);
 
+extern int	machine_at_rycleopardlx_init(const machine_t *);
+
 extern int	machine_at_pb410a_init(const machine_t *);
 
 extern int	machine_at_acera1g_init(const machine_t *);
diff --git a/src/machine/m_at_386dx_486.c b/src/machine/m_at_386dx_486.c
index 0f47126ee..9876fd498 100644
--- a/src/machine/m_at_386dx_486.c
+++ b/src/machine/m_at_386dx_486.c
@@ -102,6 +102,25 @@ machine_at_ecs386_init(const machine_t *model)
     return ret;
 }
 
+int
+machine_at_rycleopardlx_init(const machine_t *model)
+{
+    int ret;
+
+    ret = bios_load_linear(L"roms/machines/rycleopardlx/486-RYC-Leopard-LX.BIN",
+			   0x000f0000, 65536, 0);
+
+    if (bios_only || !ret)
+	return ret;
+
+    machine_at_common_init(model);
+
+    device_add(&opti283_device);
+    device_add(&keyboard_at_ami_device);
+    device_add(&fdc_at_device);
+
+    return ret;
+}
 
 int
 machine_at_pb410a_init(const machine_t *model)
diff --git a/src/machine/machine_table.c b/src/machine/machine_table.c
index 8a0488c0d..80828826d 100644
--- a/src/machine/machine_table.c
+++ b/src/machine/machine_table.c
@@ -197,6 +197,7 @@ const machine_t machines[] = {
     { "[ACC 2168] Packard Bell PB410A",		"pb410a",		MACHINE_TYPE_486,		{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, MACHINE_ISA | MACHINE_AT | MACHINE_PS2 | MACHINE_HDC | MACHINE_VIDEO,			  	  4,   36,   1, 127,	       machine_at_pb410a_init, NULL			},    
 
     /* 486 machines */
+    { "[OPTi 283] RYC Leopard LX",		"rycleopardlx",		MACHINE_TYPE_486,		{{"IBM", cpus_IBM486SLC},      {"",      NULL}, {"",      NULL},{"",      NULL},     {"",      NULL}}, MACHINE_ISA | MACHINE_AT | MACHINE_HDC,						  1,   16,   1, 127,	      machine_at_rycleopardlx_init, NULL			},    
     { "[OPTi 495] Award 486 clone",		"award486",		MACHINE_TYPE_486,		{{"Intel", cpus_i486S1},      {"AMD", cpus_Am486S1}, {"Cyrix", cpus_Cx486S1},{"",      NULL},     {"",      NULL}}, MACHINE_ISA | MACHINE_VLB | MACHINE_AT | MACHINE_HDC,						  1,   32,   1, 127,	      machine_at_opti495_init, NULL			},    
     { "[OPTi 495] MR 486 clone",		"mr486",		MACHINE_TYPE_486,		{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, MACHINE_ISA | MACHINE_VLB | MACHINE_AT | MACHINE_HDC,						  1,   32,   1, 127,	   machine_at_opti495_mr_init, NULL			},
     { "[OPTi 495] Dataexpert SX495 (486)",	"ami486",		MACHINE_TYPE_486,		{{"Intel", cpus_i486S1},      {"AMD", cpus_Am486S1}, {"Cyrix", cpus_Cx486S1},{"",      NULL},     {"",      NULL}}, MACHINE_ISA | MACHINE_VLB | MACHINE_AT | MACHINE_HDC,						  1,   32,   1, 127,	  machine_at_opti495_ami_init, NULL			},
diff --git a/src/win/Makefile.mingw b/src/win/Makefile.mingw
index f497103fb..69983be69 100644
--- a/src/win/Makefile.mingw
+++ b/src/win/Makefile.mingw
@@ -572,7 +572,7 @@ CPUOBJ		:= cpu.o cpu_table.o \
 CHIPSETOBJ	:= acc2168.o cs8230.o ali1429.o headland.o i82335.o \
 		    intel_420ex.o intel_4x0.o intel_sio.o intel_piix.o ioapic.o \
 		    neat.o opti495.o opti895.o opti5x7.o scamp.o scat.o \
-		    sis_85c310.o sis_85c471.o sis_85c496.o \
+		    sis_85c310.o sis_85c471.o sis_85c496.o opti283.o \
 		    via_apollo.o via_vpx.o via_vt82c586b.o via_vt82c596b.o wd76c10.o vl82c480.o \
 			amd640.o