superxavix CRTC(?) logging

src/mame/tvgames/xavix.cpp

@@ -447,6 +447,9 @@ void xavix_state::superxavix_lowbus_map(address_map &map)
 	map(0x6f7e, 0x6f7e).rw(FUNC(xavix_state::superxavix_bitmap_pal_saturation_r), FUNC(xavix_state::superxavix_bitmap_pal_saturation_w)); // SgdPalBmpSat
 	map(0x6f7f, 0x6f7f).rw(FUNC(xavix_state::superxavix_bitmap_pal_lightness_r), FUNC(xavix_state::superxavix_bitmap_pal_lightness_w)); // SgdPalBmpLgt
 
+	map(0x6f80, 0x6f99).rw(FUNC(xavix_state::superxavix_crtc_1_r), FUNC(xavix_state::superxavix_crtc_1_w)).share("sx_crtc_1"); // Super XaviX CRTC?
+	map(0x6fa0, 0x6fa7).rw(FUNC(xavix_state::superxavix_crtc_2_r), FUNC(xavix_state::superxavix_crtc_2_w)).share("sx_crtc_2"); // maybe more CRTC regs?
+
 	map(0x6fb0, 0x6fc7).ram().share("bmp_base");
 
 	// extended external bus stuff (possible banking control?)

src/mame/tvgames/xavix.h

@@ -115,7 +115,9 @@ class xavix_state : public driver_device
 		m_anport(*this, "anport"),
 		m_math(*this, "math"),
 		m_xavix2002io(*this, "xavix2002io"),
-		m_sx_plt_loc(*this, "sx_plt_loc")
+		m_sx_plt_loc(*this, "sx_plt_loc"),
+		m_sx_crtc_1(*this, "sx_crtc_1"),
+		m_sx_crtc_2(*this, "sx_crtc_2")
 	{ }
 
 	void xavix(machine_config &config);
@@ -420,6 +422,11 @@ class xavix_state : public driver_device
 
 	void spriteregs_w(uint8_t data);
 
+	void superxavix_crtc_1_w(offs_t offset, uint8_t data);
+	uint8_t superxavix_crtc_1_r(offs_t offset);
+	void superxavix_crtc_2_w(offs_t offset, uint8_t data);
+	uint8_t superxavix_crtc_2_r(offs_t offset);
+
 	void superxavix_plt_loc_w(offs_t offset, uint8_t data);
 	uint8_t superxavix_plt_loc_r(offs_t offset);
 
@@ -617,6 +624,8 @@ class xavix_state : public driver_device
 	required_device<xavix_math_device> m_math;
 	optional_device<xavix2002_io_device> m_xavix2002io;
 	optional_shared_ptr<uint8_t> m_sx_plt_loc;
+	optional_shared_ptr<uint8_t> m_sx_crtc_1;
+	optional_shared_ptr<uint8_t> m_sx_crtc_2;
 
 	uint8_t m_extbusctrl[3]{};
 

src/mame/tvgames/xavix_v.cpp

@@ -111,9 +111,32 @@ void xavix_state::spriteram_w(offs_t offset, uint8_t data)
 	}
 }
 
+void xavix_state::superxavix_crtc_1_w(offs_t offset, uint8_t data)
+{
+	logerror("%s superxavix_crtc_1_w %02x %02x\n", machine().describe_context(), offset, data);
+	m_sx_crtc_1[offset] = data;
+}
+
+uint8_t xavix_state::superxavix_crtc_1_r(offs_t offset)
+{
+	return m_sx_crtc_1[offset];
+}
+
+void xavix_state::superxavix_crtc_2_w(offs_t offset, uint8_t data)
+{
+	logerror("%s superxavix_crtc_2_w %02x %02x\n", machine().describe_context(), offset, data);
+	m_sx_crtc_2[offset] = data;
+}
+
+uint8_t xavix_state::superxavix_crtc_2_r(offs_t offset)
+{
+	return m_sx_crtc_2[offset];
+}
+
+
 void xavix_state::superxavix_plt_loc_w(offs_t offset, uint8_t data)
 {
-	logerror("%s superxavix_plt_loc_w %02x %08x\n", machine().describe_context(), offset, data);
+	logerror("%s superxavix_plt_loc_w %02x %02x\n", machine().describe_context(), offset, data);
 
 	m_sx_plt_loc[offset] = data;
 	if (offset == 3)