diff --git a/bsnes/sfc/coprocessor/icd/icd.cpp b/bsnes/sfc/coprocessor/icd/icd.cpp
index d5a7f12d..ab2f7462 100644
--- a/bsnes/sfc/coprocessor/icd/icd.cpp
+++ b/bsnes/sfc/coprocessor/icd/icd.cpp
@@ -48,10 +48,7 @@ namespace SameBoy {
 }
 
 auto ICD::synchronizeCPU() -> void {
-  if(clock >= 0) {
-    scheduler.desynchronize();
-    co_switch(cpu.thread);
-  }
+  if(clock >= 0) scheduler.resume(cpu.thread);
 }
 
 auto ICD::Enter() -> void {
diff --git a/bsnes/sfc/coprocessor/sa1/sa1.cpp b/bsnes/sfc/coprocessor/sa1/sa1.cpp
index 5e487f7a..de9593e7 100644
--- a/bsnes/sfc/coprocessor/sa1/sa1.cpp
+++ b/bsnes/sfc/coprocessor/sa1/sa1.cpp
@@ -12,10 +12,7 @@ namespace SuperFamicom {
 SA1 sa1;
 
 auto SA1::synchronizeCPU() -> void {
-  if(clock >= 0) {
-    scheduler.desynchronize();
-    co_switch(cpu.thread);
-  }
+  if(clock >= 0) scheduler.resume(cpu.thread);
 }
 
 auto SA1::Enter() -> void {
diff --git a/bsnes/sfc/smp/smp.cpp b/bsnes/sfc/smp/smp.cpp
index 9a746b9a..4002855a 100644
--- a/bsnes/sfc/smp/smp.cpp
+++ b/bsnes/sfc/smp/smp.cpp
@@ -9,10 +9,7 @@ SMP smp;
 #include "serialization.cpp"
 
 auto SMP::synchronizeCPU() -> void {
-  if(clock >= 0) {
-    scheduler.desynchronize();
-    co_switch(cpu.thread);
-  }
+  if(clock >= 0) scheduler.resume(cpu.thread);
 }
 
 auto SMP::synchronizeDSP() -> void {
diff --git a/libco/amd64.c b/libco/amd64.c
index 686b8565..e56924f3 100755
--- a/libco/amd64.c
+++ b/libco/amd64.c
@@ -168,20 +168,6 @@ void co_switch(cothread_t handle) {
   co_swap(co_active_handle = handle, co_previous_handle);
 }
 
-unsigned int co_size(unsigned int size) {
-  size += 512;
-  size &= ~15;
-  return size;
-}
-
-void co_save(cothread_t handle, void* memory, unsigned int size) {
-  memcpy(memory, handle, size);
-}
-
-void co_load(cothread_t handle, const void* memory, unsigned int size) {
-  memcpy(handle, memory, size);
-}
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/libco/libco.h b/libco/libco.h
index 0a5db70a..b7f60852 100755
--- a/libco/libco.h
+++ b/libco/libco.h
@@ -18,9 +18,6 @@ cothread_t co_derive(void*, unsigned int, void (*)(void));
 cothread_t co_create(unsigned int, void (*)(void));
 void co_delete(cothread_t);
 void co_switch(cothread_t);
-unsigned int co_size(unsigned int);
-void co_save(cothread_t, void*, unsigned int);
-void co_load(cothread_t, const void*, unsigned int);
 
 #ifdef __cplusplus
 }