diff --git a/pcsx2/CMakeLists.txt b/pcsx2/CMakeLists.txt
index 7c938f751b..bc811f360b 100644
--- a/pcsx2/CMakeLists.txt
+++ b/pcsx2/CMakeLists.txt
@@ -364,7 +364,6 @@ set(pcsx2USBHeaders
 	USB/proxybase.h
 	USB/deviceproxy.h
 	USB/configuration.h
-	USB/platcompat.h
 	USB/osdebugout.h
 	USB/helpers.h
 	USB/readerwriterqueue/readerwriterqueue.h
diff --git a/pcsx2/IopCounters.cpp b/pcsx2/IopCounters.cpp
index 1e7dd6afcf..59a5316489 100644
--- a/pcsx2/IopCounters.cpp
+++ b/pcsx2/IopCounters.cpp
@@ -22,6 +22,7 @@
 #include "IopCommon.h"
 #include "SPU2/spu2.h"
 #include "DEV9/DEV9.h"
+#include "USB/USB.h"
 
 #include <math.h>
 
@@ -149,12 +150,9 @@ void psxRcntInit()
 	psxCounters[6].CycleT = psxCounters[6].rate;
 	psxCounters[6].mode = 0x8;
 
-	if (USBasync != NULL)
-	{
-		psxCounters[7].rate = PSXCLK / 1000;
-		psxCounters[7].CycleT = psxCounters[7].rate;
-		psxCounters[7].mode = 0x8;
-	}
+	psxCounters[7].rate = PSXCLK / 1000;
+	psxCounters[7].CycleT = psxCounters[7].rate;
+	psxCounters[7].mode = 0x8;
 
 	for (i = 0; i < 8; i++)
 		psxCounters[i].sCycleT = psxRegs.cycle;
@@ -516,22 +514,19 @@ void psxRcntUpdate()
 		c -= difference;
 	psxNextCounter = c;
 	DEV9async(1);
-	if(USBasync)
-	{
-		const s32 difference = psxRegs.cycle - psxCounters[7].sCycleT;
-		s32 c = psxCounters[7].CycleT;
+    const s32 diffusb = psxRegs.cycle - psxCounters[7].sCycleT;
+    s32 cusb = psxCounters[7].CycleT;
 
-		if (difference >= psxCounters[7].CycleT)
-		{
-			USBasync(difference);
-			psxCounters[7].sCycleT = psxRegs.cycle;
-			psxCounters[7].CycleT = psxCounters[7].rate;
-		}
-		else
-			c -= difference;
-		if (c < psxNextCounter)
-			psxNextCounter = c;
-	}
+    if (diffusb >= psxCounters[7].CycleT)
+    {
+		USBasync(diffusb);
+		psxCounters[7].sCycleT = psxRegs.cycle;
+		psxCounters[7].CycleT = psxCounters[7].rate;
+    }
+    else
+		cusb -= diffusb;
+    if (cusb < psxNextCounter)
+		psxNextCounter = cusb;
 
 	for (i = 0; i < 6; i++)
 		_rcntSet(i);
diff --git a/pcsx2/IopIrq.cpp b/pcsx2/IopIrq.cpp
index b28e0d87e1..7560bd1f58 100644
--- a/pcsx2/IopIrq.cpp
+++ b/pcsx2/IopIrq.cpp
@@ -16,6 +16,7 @@
 #include "PrecompiledHeader.h"
 #include "IopCommon.h"
 #include "DEV9/DEV9.h"
+#include "USB/USB.h"
 
 using namespace R3000A;
 
@@ -33,8 +34,6 @@ void dev9Irq(int cycles)
 
 void usbInterrupt()
 {
-	if (usbHandler != NULL && (usbHandler() != 1)) return;
-
 	iopIntcIrq(22);
 }
 
diff --git a/pcsx2/R5900.cpp b/pcsx2/R5900.cpp
index 0c49a1c10c..7de0ee4bd6 100644
--- a/pcsx2/R5900.cpp
+++ b/pcsx2/R5900.cpp
@@ -32,6 +32,7 @@
 
 #include "Elfheader.h"
 #include "CDVD/CDVD.h"
+#include "USB/USB.h"
 #include "Patch.h"
 #include "GameDatabase.h"
 
@@ -109,8 +110,7 @@ void cpuReset()
 	ElfEntry = -1;
 
 	// Probably not the right place, but it has to be done when the ram is actually initialized
-	if(USBsetRAM != 0)
-		USBsetRAM(iopMem->Main);
+	USBsetRAM(iopMem->Main);
 
 	// FIXME: LastELF should be reset on media changes as well as on CPU resets, in
 	// the very unlikely case that a user swaps to another media source that "looks"
diff --git a/pcsx2/USB/USB.cpp b/pcsx2/USB/USB.cpp
index 8553fce6c8..de5b7eb40f 100644
--- a/pcsx2/USB/USB.cpp
+++ b/pcsx2/USB/USB.cpp
@@ -22,9 +22,7 @@
 #include <cerrno>
 #include <cassert>
 
-#include "version.h" //CMake generated
 #include "USB.h"
-#include "platcompat.h"
 #include "osdebugout.h"
 #include "qemu-usb/USBinternal.h"
 #include "qemu-usb/desc.h"
@@ -33,8 +31,6 @@
 
 #define PSXCLK	36864000	/* 36.864 Mhz */
 
-static char libraryName[256];
-
 OHCIState *qemu_ohci = NULL;
 USBDevice *usb_device[2] = { NULL };
 bool configChanged = false;
@@ -195,14 +191,8 @@ s32 USBinit() {
 
 	if (conf.Log && !usbLog)
 	{
-		usbLog =
-#if _UNICODE
-			_wfopen(LogDir.c_str(), L"wb");// L"wb,ccs=UNICODE");
-#else
-			fopen(LogDir.c_str(), "w");
-#endif
+		usbLog = wfopen(LogDir.c_str(), "wb");// L"wb,ccs=UNICODE");
 		//if(usbLog) setvbuf(usbLog, NULL,  _IONBF, 0);
-		USB_LOG("usbqemu wheel mod plugin version %d.%d.%d\n", VER_REV, VER_BLD, VER_FIX);
 		USB_LOG("USBinit\n");
 	}
 
@@ -239,7 +229,6 @@ s32 USBopen(void *pDsp) {
 	{
 		usbLog = fopen("logs/usbLog.txt", "a");
 		//if(usbLog) setvbuf(usbLog, NULL,  _IONBF, 0);
-		USB_LOG("usbqemu wheel mod plugin version %d.%d.%d\n", VER_REV, VER_BLD, VER_FIX);
 	}
 
 	USB_LOG("USBopen\n");
diff --git a/pcsx2/USB/USB.h b/pcsx2/USB/USB.h
index 435c63e060..54abfeb042 100644
--- a/pcsx2/USB/USB.h
+++ b/pcsx2/USB/USB.h
@@ -23,7 +23,7 @@
 #include <string>
 #include <limits.h>
 
-#include "platcompat.h"
+#include "SaveState.h"
 #include "osdebugout.h"
 
 // ---------------------------------------------------------------------
diff --git a/pcsx2/USB/configuration.cpp b/pcsx2/USB/configuration.cpp
index 59bdc4fb92..5e2a3645d7 100644
--- a/pcsx2/USB/configuration.cpp
+++ b/pcsx2/USB/configuration.cpp
@@ -12,7 +12,7 @@ TSTDSTRING IniPath = TSTDSTRING(TEXT("./inis/")) + iniFile; // default path, jus
 TSTDSTRING LogDir;
 CIniFile ciniFile;
 
-EXPORT_C_(void) USBsetSettingsDir( const char* dir )
+void USBsetSettingsDir( const char* dir )
 {
 #ifdef _UNICODE
 	OSDebugOut(L"USBsetSettingsDir: %S\n", dir);
@@ -29,7 +29,7 @@ EXPORT_C_(void) USBsetSettingsDir( const char* dir )
 #endif
 }
 
-EXPORT_C_(void) USBsetLogDir( const char* dir )
+void USBsetLogDir( const char* dir )
 {
 #ifdef _UNICODE
 	OSDebugOut(L"USBsetLogDir: %S\n", dir);
diff --git a/pcsx2/USB/configuration.h b/pcsx2/USB/configuration.h
index 1bb7b5195c..88e1d0b97b 100644
--- a/pcsx2/USB/configuration.h
+++ b/pcsx2/USB/configuration.h
@@ -1,12 +1,54 @@
 #pragma once
 
-#ifndef CONFIGURATION_H
-#define CONFIGURATION_H
+
+#ifdef _WIN32
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#include <windows.h>
+#define wfopen _wfopen
+#define fseeko64 _fseeki64
+#define ftello64 _ftelli64
+#define TSTDSTRING std::wstring
+#define TSTDSTRINGSTREAM std::wstringstream
+#define TSTDTOSTRING std::to_wstring
+
+#ifdef _MSC_VER
+typedef SSIZE_T ssize_t;
+#endif
+
+//FIXME narrow string fmt
+#ifdef UNICODE
+#define SFMTs "S"
+#endif
+
+#define __builtin_constant_p(p) false
+
+#else //_WIN32
+
+#define MAX_PATH PATH_MAX
+#define __inline inline
+
+//#ifndef TEXT
+//#define TEXT(x) L##x
+//#endif
+//FIXME narrow string fmt
+#define SFMTs "s"
+#define TEXT(val) val
+#define TCHAR char
+#define wfopen fopen
+#define TSTDSTRING std::string
+#define TSTDSTRINGSTREAM std::stringstream
+#define TSTDTOSTRING std::to_string
+
+void SysMessage(const char *fmt, ...);
+
+#endif //_WIN32
+
 #include <vector>
 #include <string>
 #include <map>
 #include <sstream>
-#include "platcompat.h"
 #include "osdebugout.h"
 
 #define RESULT_CANCELED 0
@@ -71,6 +113,9 @@ bool LoadSettingValue(const TSTDSTRING& ini, const TSTDSTRING& section, const TC
 bool SaveSettingValue(const TSTDSTRING& ini, const TSTDSTRING& section, const TCHAR* param, const std::string& value);
 #endif
 
+void USBsetSettingsDir( const char* dir );
+void USBsetLogDir( const char* dir );
+
 template<typename Type>
 bool LoadSetting(const char* dev_type, int port, const std::string& key, const TCHAR* name, Type& var)
 {
@@ -163,4 +208,8 @@ bool SaveSetting(const TCHAR* section, const TCHAR* key, const Type var)
 	return ret;
 }
 
-#endif
+template <class T, std::size_t N>
+constexpr std::size_t countof(const T (&)[N]) noexcept
+{
+    return N;
+}
diff --git a/pcsx2/USB/osdebugout.h b/pcsx2/USB/osdebugout.h
index 544e8a11fc..ad3ea84604 100644
--- a/pcsx2/USB/osdebugout.h
+++ b/pcsx2/USB/osdebugout.h
@@ -8,7 +8,6 @@
 void __Log(const char* fmt, ...);
 
 #ifdef _WIN32
-#include "platcompat.h"
 
 #include <vector>
 void _OSDebugOut(const TCHAR *psz_fmt, ...);
diff --git a/pcsx2/USB/platcompat.h b/pcsx2/USB/platcompat.h
deleted file mode 100644
index 09dbe991fb..0000000000
--- a/pcsx2/USB/platcompat.h
+++ /dev/null
@@ -1,143 +0,0 @@
-#ifndef PLATCOMPAT_H
-#define PLATCOMPAT_H
-
-// Annoying defines
-// ---------------------------------------------------------------------
-// make sure __POSIX__ is defined for all systems where we assume POSIX
-// compliance
-#if defined(__linux__) || defined(__APPLE__) || defined(__unix__) || defined(__CYGWIN__) || defined(__LINUX__)
-#if !defined(__POSIX__)
-#define __POSIX__ 1
-#endif
-#endif
-
-#ifdef _WIN32
-#	define CALLBACK			__stdcall
-#else
-#	define CALLBACK			__attribute__((stdcall))
-#endif
-
-#ifndef EXPORT_C_
-#ifdef _MSC_VER
-#define EXPORT_C_(type) extern "C" type CALLBACK
-#else
-#define EXPORT_C_(type) extern "C" __attribute__((stdcall,externally_visible,visibility("default"))) type
-//#define EXPORT_C_(type) extern "C" __attribute__((stdcall,visibility("default"))) type
-#endif
-#endif
-
-#ifdef _WIN32
-#ifndef NOMINMAX
-#define NOMINMAX
-#endif
-#include <windows.h>
-#define wfopen _wfopen
-#define fseeko64 _fseeki64
-#define ftello64 _ftelli64
-#define TSTDSTRING std::wstring
-#define TSTDSTRINGSTREAM std::wstringstream
-#define TSTDTOSTRING std::to_wstring
-
-#ifdef _MSC_VER
-typedef SSIZE_T ssize_t;
-#endif
-
-//FIXME narrow string fmt
-#ifdef UNICODE
-#define SFMTs "S"
-#else
-#define SFMTs "s"
-#endif
-
-#define __builtin_constant_p(p) false
-
-#if _UNICODE
-void SysMessageW(const wchar_t *fmt, ...);
-#define SysMessage SysMessageW
-#else
-void SysMessageA(const char *fmt, ...);
-#define SysMessage SysMessageA
-#endif
-
-#ifndef _T
-#define _T(x) L##x
-#endif
-
-#else //_WIN32
-
-#define MAX_PATH PATH_MAX
-#define __inline inline
-
-//#ifndef TEXT
-//#define TEXT(x) L##x
-//#endif
-//FIXME narrow string fmt
-#define SFMTs "s"
-#define TEXT(val) val
-#define _T(x) x
-#define TCHAR char
-#define wfopen fopen
-#define TSTDSTRING std::string
-#define TSTDSTRINGSTREAM std::stringstream
-#define TSTDTOSTRING std::to_string
-
-void SysMessage(const char *fmt, ...);
-
-#endif //_WIN32
-
-#if __MINGW32__
-
-#define DBL_EPSILON 2.2204460492503131e-16
-#define FLT_EPSILON 1.1920928955078125e-7f
-
-template <size_t size>
-errno_t mbstowcs_s(
-	size_t *pReturnValue,
-	wchar_t (&wcstr)[size],
-	const char *mbstr,
-	size_t count
-)
-{
-	return mbstowcs_s(pReturnValue, wcstr, size, mbstr, count);
-}
-
-template <size_t size>
-errno_t wcstombs_s(
-	size_t *pReturnValue,
-	char (&mbstr)[size],
-	const wchar_t *wcstr,
-	size_t count
-)
-{
-	return wcstombs_s(pReturnValue, mbstr, size, wcstr, count);
-}
-
-#endif //__MINGW32__
-
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0])))
-#endif
-
-#include <cstddef>
-
-template <class T, std::size_t N>
-constexpr std::size_t countof(const T (&)[N]) noexcept
-{
-    return N;
-}
-
-template <class T>
-constexpr std::size_t countof(const T N)
-{
-    return N.size();
-}
-
-//TODO Idk, used only in desc.h and struct USBDescriptor should be already packed anyway
-#if defined(_WIN32) && !defined(__MINGW32__)
-#define PACK(def,name) __pragma( pack(push, 1) ) def name __pragma( pack(pop) )
-#elif defined(__clang__)
-#define PACK(def,name) def __attribute__((packed)) name
-#else
-#define PACK(def,name) def __attribute__((gcc_struct, packed)) name
-#endif
-#endif
diff --git a/pcsx2/USB/qemu-usb/bus.cpp b/pcsx2/USB/qemu-usb/bus.cpp
index 3728e16297..3e3ae548ed 100644
--- a/pcsx2/USB/qemu-usb/bus.cpp
+++ b/pcsx2/USB/qemu-usb/bus.cpp
@@ -1,4 +1,3 @@
-#include "platcompat.h"
 #include "USBinternal.h"
 #include "vl.h"
 
@@ -128,4 +127,4 @@ void usb_device_free_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps)
     if (klass->free_streams) {
         klass->free_streams(dev, eps, nr_eps);
     }
-}
\ No newline at end of file
+}
diff --git a/pcsx2/USB/qemu-usb/core.cpp b/pcsx2/USB/qemu-usb/core.cpp
index f7c977cd2b..495a7eb32c 100644
--- a/pcsx2/USB/qemu-usb/core.cpp
+++ b/pcsx2/USB/qemu-usb/core.cpp
@@ -23,7 +23,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "platcompat.h"
 #include "osdebugout.h"
 #include "vl.h"
 #include "iov.h"
diff --git a/pcsx2/USB/qemu-usb/desc.cpp b/pcsx2/USB/qemu-usb/desc.cpp
index 5edfafe53c..07e612f215 100644
--- a/pcsx2/USB/qemu-usb/desc.cpp
+++ b/pcsx2/USB/qemu-usb/desc.cpp
@@ -1,5 +1,3 @@
-#include "platcompat.h"
-
 #include "vl.h"
 #include "desc.h"
 #include "glib.h"
@@ -848,4 +846,4 @@ int usb_desc_handle_control(USBDevice *dev, USBPacket *p,
 		break;
 	}
 	return ret;
-}
\ No newline at end of file
+}
diff --git a/pcsx2/USB/qemu-usb/desc.h b/pcsx2/USB/qemu-usb/desc.h
index b23d4c437f..6cb2ed7862 100644
--- a/pcsx2/USB/qemu-usb/desc.h
+++ b/pcsx2/USB/qemu-usb/desc.h
@@ -1,10 +1,16 @@
-#ifndef QEMU_HW_USB_DESC_H
-#define QEMU_HW_USB_DESC_H
+#pragma once
 
-#include "platcompat.h"
 #include <wchar.h>
 #include <vector>
 
+#if defined(_WIN32) && !defined(__MINGW32__)
+#define PACK(def,name) __pragma( pack(push, 1) ) def name __pragma( pack(pop) )
+#elif defined(__clang__)
+#define PACK(def,name) def __attribute__((packed)) name
+#else
+#define PACK(def,name) def __attribute__((gcc_struct, packed)) name
+#endif
+
 /* binary representation */
 PACK(typedef struct  USBDescriptor {
 	uint8_t                   bLength;
@@ -244,4 +250,3 @@ int usb_desc_handle_control(USBDevice *dev, USBPacket *p,
 
 int usb_desc_set_config(USBDevice *dev, int value);
 int usb_desc_set_interface(USBDevice *dev, int index, int value);
-#endif /* QEMU_HW_USB_DESC_H */
\ No newline at end of file
diff --git a/pcsx2/USB/qemu-usb/iov.cpp b/pcsx2/USB/qemu-usb/iov.cpp
index b2a71e345d..6d343425eb 100644
--- a/pcsx2/USB/qemu-usb/iov.cpp
+++ b/pcsx2/USB/qemu-usb/iov.cpp
@@ -16,7 +16,6 @@
  * GNU GPL, version 2 or (at your option) any later version.
  */
 
-#include "platcompat.h"
 #include "vl.h"
 //#include "qemu-common.h"
 #include "iov.h"
diff --git a/pcsx2/USB/qemu-usb/iov.h b/pcsx2/USB/qemu-usb/iov.h
index 082a41d915..3d843992b8 100644
--- a/pcsx2/USB/qemu-usb/iov.h
+++ b/pcsx2/USB/qemu-usb/iov.h
@@ -13,7 +13,6 @@
 
 #ifndef IOV_H
 #define IOV_H
-#include "platcompat.h" /* ssize_t */
 
 #if !defined(_BITS_UIO_H) && !defined(__iovec_defined) /* /usr/include/bits/uio.h */
 struct iovec {
diff --git a/pcsx2/USB/qemu-usb/usb-ohci.cpp b/pcsx2/USB/qemu-usb/usb-ohci.cpp
index aed8098f73..628241e5eb 100644
--- a/pcsx2/USB/qemu-usb/usb-ohci.cpp
+++ b/pcsx2/USB/qemu-usb/usb-ohci.cpp
@@ -31,7 +31,6 @@
 #include "vl.h"
 #include "queue.h"
 #include "USBinternal.h"
-#include "platcompat.h"
 #include "../osdebugout.h"
 
 #define DMA_DIRECTION_TO_DEVICE 0
diff --git a/pcsx2/USB/shared/rawinput.cpp b/pcsx2/USB/shared/rawinput.cpp
index de98a2766b..2d97a49e90 100644
--- a/pcsx2/USB/shared/rawinput.cpp
+++ b/pcsx2/USB/shared/rawinput.cpp
@@ -2,7 +2,6 @@
 #include <cstdio>
 #include <vector>
 #include <algorithm>
-#include "platcompat.h"
 #include "osdebugout.h"
 
 extern HINSTANCE hInst;
@@ -270,4 +269,4 @@ void Uninitialize()
 	eatenWnd = nullptr;
 }
 
-}} //namespace
\ No newline at end of file
+}} //namespace
diff --git a/pcsx2/USB/shared/ringbuffer.cpp b/pcsx2/USB/shared/ringbuffer.cpp
index 1809ba6f1e..87662e78b4 100644
--- a/pcsx2/USB/shared/ringbuffer.cpp
+++ b/pcsx2/USB/shared/ringbuffer.cpp
@@ -2,7 +2,6 @@
 #include <cstring>
 #include <cassert>
 #include "osdebugout.h"
-#include "platcompat.h"
 
 #if 0
 #define DPRINTF OSDebugOut
diff --git a/pcsx2/USB/usb-hid/usb-hid.h b/pcsx2/USB/usb-hid/usb-hid.h
index c4b275a37c..40a1fc6276 100644
--- a/pcsx2/USB/usb-hid/usb-hid.h
+++ b/pcsx2/USB/usb-hid/usb-hid.h
@@ -1,6 +1,6 @@
 #pragma once
 #include "../configuration.h"
-#include "qemu-usb/hid.h"
+#include "../qemu-usb/hid.h"
 #include <list>
 #include <string>
 
@@ -73,4 +73,4 @@ public:
     static int Freeze(int mode, USBDevice *dev, void *data);
 };
 
-}
\ No newline at end of file
+}