diff --git a/src/mame/drivers/apple2e.cpp b/src/mame/drivers/apple2e.cpp
index d60d91076d4..dc0ea99767e 100644
--- a/src/mame/drivers/apple2e.cpp
+++ b/src/mame/drivers/apple2e.cpp
@@ -761,6 +761,7 @@ void apple2e_state::machine_reset()
 {
 	m_page2 = false;
 	m_video->m_page2 = false;
+	m_video->m_monohgr = false;
 	m_an0 = m_an1 = m_an2 = m_an3 = false;
 	m_vbl = m_vblmask = false;
 	m_slotc3rom = false;
@@ -1080,17 +1081,24 @@ void apple2e_state::update_slotrom_banks()
 		if (!m_intcxrom)
 		{
 			m_c100bank->set_bank(3);
-			m_c300bank->set_bank(3);
 			m_c400bank->set_bank(3);
 			m_c800bank->set_bank(3);
 		}
 		else
 		{
 			m_c100bank->set_bank(4);
-			m_c300bank->set_bank(4);
 			m_c400bank->set_bank(4);
 			m_c800bank->set_bank(4);
 		}
+
+		if ((m_intcxrom) || (!m_slotc3rom))
+		{
+			m_c300bank->set_bank(4);
+		}
+		else
+		{
+			m_c300bank->set_bank(3);
+		}
 	}
 }
 
@@ -2039,6 +2047,15 @@ WRITE8_MEMBER(apple2e_state::c080_w)
 				if (data != m_cec_bank)
 				{
 					m_cec_bank = data;
+					if (data & 0x10)
+					{
+						m_video->m_monohgr = false;
+					}
+					else
+					{
+						m_video->m_monohgr = true;
+					}
+
 					auxbank_update();
 					update_slotrom_banks();
 				}
@@ -2778,7 +2795,7 @@ WRITE_LINE_MEMBER(apple2e_state::ay3600_data_ready_w)
 		m_transchar = decode[trans];
 		m_strobe = 0x80;
 
-//      printf("new char = %04x (%02x)\n", m_lastchar, m_transchar);
+		//printf("new char = %04x (%02x)\n", m_lastchar, m_transchar);
 	}
 }
 
@@ -3057,8 +3074,8 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_K)  PORT_CHAR('K') PORT_CHAR('k')
 	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_S)  PORT_CHAR('S') PORT_CHAR('s')
 	PORT_BIT(0x080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F4) PORT_NAME("F4")
-	PORT_BIT(0x240, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE)  PORT_CHAR(' ')
+	PORT_BIT(0x240, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X1")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1)      PORT_CHAR('1') PORT_CHAR('!')
@@ -3068,7 +3085,7 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_L)  PORT_CHAR('L') PORT_CHAR('l')
 	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_T)  PORT_CHAR('T') PORT_CHAR('t')
 	PORT_BIT(0x080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F5) PORT_NAME("F5")
-	PORT_BIT(0x340, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE)  PORT_CHAR(' ')
+	PORT_BIT(0x340, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X2")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2)  PORT_CHAR('2') PORT_CHAR('\"')
@@ -3079,7 +3096,7 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_U)  PORT_CHAR('U') PORT_CHAR('u')
 	PORT_BIT(0x040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F7) PORT_NAME("CN")
 	PORT_BIT(0x080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Esc")      PORT_CODE(KEYCODE_ESC)      PORT_CHAR(27)
-	PORT_BIT(0x300, IP_ACTIVE_HIGH, IPT_KEYBOARD)
+	PORT_BIT(0x300, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X3")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3)  PORT_CHAR('3') PORT_CHAR('#')
@@ -3089,7 +3106,7 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_N)  PORT_CHAR('N') PORT_CHAR('n')
 	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_V)  PORT_CHAR('V') PORT_CHAR('v')
 	PORT_BIT(0x080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Tab")      PORT_CODE(KEYCODE_TAB)      PORT_CHAR(9)
-	PORT_BIT(0x340, IP_ACTIVE_HIGH, IPT_KEYBOARD)
+	PORT_BIT(0x340, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X4")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4)  PORT_CHAR('4') PORT_CHAR('$')
@@ -3101,7 +3118,7 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F8) PORT_NAME("EN")
 	PORT_BIT(0x080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F9) PORT_NAME("STOP")
 	PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(UTF8_LEFT)      PORT_CODE(KEYCODE_LEFT)
-	PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYBOARD)
+	PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X5")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5)  PORT_CHAR('5') PORT_CHAR('%')
@@ -3112,7 +3129,7 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_X)  PORT_CHAR('X') PORT_CHAR('x')
 	PORT_BIT(0x040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F1) PORT_NAME("F1")
 	PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(UTF8_UP)        PORT_CODE(KEYCODE_UP)
-	PORT_BIT(0x280, IP_ACTIVE_HIGH, IPT_KEYBOARD)
+	PORT_BIT(0x280, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X6")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6)  PORT_CHAR('6') PORT_CHAR('&')
@@ -3123,7 +3140,7 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y)  PORT_CHAR('Y') PORT_CHAR('y')
 	PORT_BIT(0x040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F2) PORT_NAME("F2")
 	PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(UTF8_DOWN)      PORT_CODE(KEYCODE_DOWN)     PORT_CHAR(10)
-	PORT_BIT(0x280, IP_ACTIVE_HIGH, IPT_KEYBOARD)
+	PORT_BIT(0x280, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X7")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7)  PORT_CHAR('7') PORT_CHAR('\'')
@@ -3135,7 +3152,7 @@ static INPUT_PORTS_START( ceci )
 	PORT_BIT(0x040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F3) PORT_NAME("F3")
 	PORT_BIT(0x080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Return")   PORT_CODE(KEYCODE_ENTER)    PORT_CHAR(13)
 	PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(UTF8_RIGHT)     PORT_CODE(KEYCODE_RIGHT)
-	PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYBOARD)
+	PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("X8")
 	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_UNUSED)
diff --git a/src/mame/video/apple2.cpp b/src/mame/video/apple2.cpp
index 19d07343d00..a88bdabd748 100644
--- a/src/mame/video/apple2.cpp
+++ b/src/mame/video/apple2.cpp
@@ -1368,6 +1368,12 @@ void a2_video_device::hgr_update(screen_device &screen, bitmap_ind16 &bitmap, co
 				artifact_map_ptr = &m_hires_artifact_map[((vram_row[col + 1] & 0x80) >> 7) * 16];
 			}
 
+			// CEC mono HGR mode
+			if ((m_monohgr) && (mon_type == 0))
+			{
+				mon_type = 1;
+			}
+
 			switch (mon_type)
 			{
 				case 0:
diff --git a/src/mame/video/apple2.h b/src/mame/video/apple2.h
index b9bc4b5f44f..d843ce78887 100644
--- a/src/mame/video/apple2.h
+++ b/src/mame/video/apple2.h
@@ -28,6 +28,8 @@ public:
 	bool m_80col;
 	bool m_altcharset;
 	bool m_an2;
+	bool m_monohgr;
+
 	std::unique_ptr<uint16_t[]> m_hires_artifact_map;
 	std::unique_ptr<uint16_t[]> m_dhires_artifact_map;