diff --git a/src/devices/imagedev/floppy.cpp b/src/devices/imagedev/floppy.cpp
index 85841bcfdd9..5852a1bbdb6 100644
--- a/src/devices/imagedev/floppy.cpp
+++ b/src/devices/imagedev/floppy.cpp
@@ -2419,7 +2419,7 @@ bool mac_floppy_device::wpt_r()
 	// actual_ss may have changed after the phases were set
 	m_reg = (m_reg & 7) | (actual_ss ? 8 : 0);
 
-	if(1 || (m_reg != 4 && m_reg != 12 && m_reg != 5 && m_reg != 13))
+	if(0 && (m_reg != 4 && m_reg != 12 && m_reg != 5 && m_reg != 13))
 		logerror("fdc disk sense reg %x %s %p\n", m_reg, regnames[m_reg], image.get());
 
 	switch(m_reg) {
diff --git a/src/devices/machine/iwm.cpp b/src/devices/machine/iwm.cpp
index 5cb6490c970..34508b10530 100644
--- a/src/devices/machine/iwm.cpp
+++ b/src/devices/machine/iwm.cpp
@@ -230,7 +230,8 @@ u8 iwm_device::control(int offset, u8 data)
 		if(s == 0xc0 && m_active)
 			slot = "write load / write data";
 
-		logerror("control %c%c %c%c %c%c%c%c (%s) [%s, %s] whd=%02x data=%02x\n",
+		logerror("%s control %c%c %c%c %c%c%c%c (%s) [%s, %s] whd=%02x data=%02x\n",
+				 machine().time().to_string(),
 				 m_control & 0x80 ? '1' : '0',
 				 m_control & 0x40 ? '1' : '0',
 				 m_control & 0x20 ? 'b' : 'a',
@@ -391,7 +392,8 @@ void iwm_device::sync()
 
 				} else if(m_rsh >= 0x80) {
 					m_data = m_rsh;
-					//					logerror("%s DATAR %02x\n", cycles_to_time(m_last_sync).to_string(), m_data);
+					m_async_update = 0;
+					//					logerror("%s %010d DATAR %s %02x\n", cycles_to_time(m_last_sync).to_string(), m_last_sync, m_floppy->tag(), m_data);
 					m_rsh = 0;
 				}
 				break;
@@ -404,9 +406,8 @@ void iwm_device::sync()
 			m_sync_update = 0;
 		}
 		if(m_async_update && m_async_update <= m_last_sync) {
-			if(!is_sync()) {
+			if(!is_sync())
 				m_data = 0;
-			}
 			m_async_update = 0;
 		}
 		break;
diff --git a/src/lib/formats/ap_dsk35.cpp b/src/lib/formats/ap_dsk35.cpp
index 8b76097211c..4e7ac40298d 100644
--- a/src/lib/formats/ap_dsk35.cpp
+++ b/src/lib/formats/ap_dsk35.cpp
@@ -1431,10 +1431,10 @@ bool apple_gcr_format::load(io_generic *io, uint32_t form_factor, const std::vec
 			for(int i=0; i<ns; i++) {
 				sectors[si].track = track;
 				sectors[si].head = head;
-				sectors[si].sector = si;
+				sectors[si].sector = i;
 				sectors[si].info = head_count == 2 ? 0x22 : 0x02;
 				sectors[si].tag = nullptr;
-				sectors[si].data = sdata + 512*si;
+				sectors[si].data = sdata + 512*i;
 				si = (si + 2) % ns;
 				if(si == 0)
 					si++;
diff --git a/src/mame/drivers/apple2gs.cpp b/src/mame/drivers/apple2gs.cpp
index 92e5862e960..65135077e9a 100644
--- a/src/mame/drivers/apple2gs.cpp
+++ b/src/mame/drivers/apple2gs.cpp
@@ -720,7 +720,7 @@ private:
 
 #define slow_cycle() \
 {   \
-	if (m_last_speed) \
+	if (!machine().side_effects_disabled() && m_last_speed) \
 	{\
 		m_slow_counter += 0x0001999a; \
 		int cycles = (m_slow_counter >> 16) & 0xffff; \