diff --git a/src/devices/machine/ldv4200hle.cpp b/src/devices/machine/ldv4200hle.cpp
index db8f86a2a03..cebdd5739c2 100644
--- a/src/devices/machine/ldv4200hle.cpp
+++ b/src/devices/machine/ldv4200hle.cpp
@@ -801,7 +801,7 @@ TIMER_CALLBACK_MEMBER(pioneer_ldv4200hle_device::process_vbi_data)
 				int32_t old_delta = (int32_t)m_mark_frame - (int32_t)old_frame;
 				int32_t curr_delta = (int32_t)m_mark_frame - (int32_t)m_curr_frame;
 				LOGMASKED(LOG_STOPS, "%s: Stop Mark is currently %d, old frame is %d, current frame is %d, old delta %d, curr delta %d\n", machine().describe_context(), m_mark_frame, old_frame, m_curr_frame, old_delta, curr_delta);
-				if (curr_delta == 0 || std::signbit(old_delta) != std::signbit(curr_delta))
+				if (curr_delta == 0 || std::signbit((double)old_delta) != std::signbit((double)curr_delta))
 				{
 					m_mark_frame = ~uint32_t(0);
 					if (is_cav_disc())
@@ -919,7 +919,7 @@ int32_t pioneer_ldv4200hle_device::player_update(const vbi_metadata &vbi, int fi
 			int32_t jump_frame = (int32_t)m_curr_frame + elapsed_tracks;
 			int32_t curr_delta = (int32_t)m_mark_frame - (int32_t)m_curr_frame;
 			int32_t next_delta = (int32_t)m_mark_frame - (int32_t)jump_frame;
-			if (std::signbit(curr_delta) != std::signbit(next_delta))
+			if (std::signbit((double)curr_delta) != std::signbit((double)next_delta))
 			{
 				elapsed_tracks = curr_delta;
 			}
diff --git a/src/mame/nintendo/vsnes.cpp b/src/mame/nintendo/vsnes.cpp
index 7044c909e7c..90dc1fc3000 100644
--- a/src/mame/nintendo/vsnes.cpp
+++ b/src/mame/nintendo/vsnes.cpp
@@ -949,9 +949,12 @@ void vs_dual_state::vsdual_vrom_banking(u8 data)
 	// switch vrom
 	m_chr_banks[Side]->set_entry(BIT(data, 2));
 
+#if 0
+	// SFR Removed
 	// bit 1 ( data & 2 ) triggers irq on the other cpu
 	auto cpu = (Side == SUB) ? m_maincpu : m_subcpu;
 	cpu->set_input_line(0, (data & 2) ? CLEAR_LINE : ASSERT_LINE);
+#endif
 
 	// move along
 	vsnes_in0_w(data);
diff --git a/src/mame/sinclair/atm.cpp b/src/mame/sinclair/atm.cpp
index 3be353b43ee..c87b4ab8179 100644
--- a/src/mame/sinclair/atm.cpp
+++ b/src/mame/sinclair/atm.cpp
@@ -352,11 +352,14 @@ void atm_state::atm_update_screen_tx(screen_device &screen, bitmap_ind16 &bitmap
 			u8 fg = ((attr & 0x40) >> 3) | (attr & 0x07);
 			u8 bg = (((attr & 0x80) >> 1) | (attr & 0x38)) >> 3;
 
+#if 0
+// SFR Removed
 			u8 chunk = *(m_char_rom + (*symb_location << 3) + (y & 0x07));
 			for (u8 i = 0x80; i; i >>= 1)
 			{
 				bitmap.pix(vpos, hpos++) = (chunk & i) ? fg : bg;
 			}
+#endif
 		}
 	}
 }
diff --git a/src/mame/sony/news_r4k.cpp b/src/mame/sony/news_r4k.cpp
index a83e7c3f468..caece8d1b6a 100644
--- a/src/mame/sony/news_r4k.cpp
+++ b/src/mame/sony/news_r4k.cpp
@@ -442,11 +442,14 @@ void news_r4k_state::machine_common(machine_config &config)
 				escc1_int_status = status ? 0x8 : 0x0; // guess
 			});
 
+#if 0
+	// SFR Removed
 	CXD8452AQ(config, m_sonic3, 0);
 	m_sonic3->set_addrmap(0, &news_r4k_state::sonic3_map);
 	m_sonic3->irq_out().set(FUNC(news_r4k_state::irq_w));
 	m_sonic3->set_bus(m_cpu, 0);
 	m_sonic3->set_apbus_address_translator(FUNC(news_r4k_state::apbus_virt_to_phys));
+#endif
 
 	// TODO: actual clock frequency - there is a 20MHz crystal nearby on the board, but traces need to be confirmed
 	DP83932C(config, m_sonic, 20'000'000);
@@ -476,10 +479,13 @@ void news_r4k_state::machine_common(machine_config &config)
 			[this] ()
 			{ return uint32_t(m_fdc->dma_r()); });
 
+#if 0
+	// SFR Removed
 	DMAC3(config, m_dmac, 0);
 	m_dmac->set_apbus_address_translator(FUNC(news_r4k_state::apbus_virt_to_phys));
 	m_dmac->set_bus(m_cpu, 0);
 	m_dmac->irq_out().set(FUNC(news_r4k_state::irq_w));
+#endif
 
 	NSCSI_BUS(config, m_scsibus0);
 	NSCSI_BUS(config, m_scsibus1);