From cfcb2417b6855605205b5a897c4aa61a5fecdabb Mon Sep 17 00:00:00 2001
From: Curt Coder <curtcoder@mail.com>
Date: Wed, 15 Apr 2020 21:24:58 +0300
Subject: [PATCH] abc800c, abc800m: Fixed HR graphics. [Curt Coder]

---
 hash/abc800.xml             | 4 ++--
 src/mame/drivers/abc80x.cpp | 8 ++++----
 src/mame/video/abc800.cpp   | 5 ++---
 3 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/hash/abc800.xml b/hash/abc800.xml
index b278aafe65e..c1da1e14bc1 100644
--- a/hash/abc800.xml
+++ b/hash/abc800.xml
@@ -189,8 +189,8 @@ license:CC0
 		<info name="serial" value="68 20018-41" />
 
 		<part name="flop" interface="floppy_5_25">
-			<dataarea name="flop" size="85140">
-				<rom name="demo11.td0" size="85140" crc="77fd2490" sha1="ba953cf6496633c449b2b49ad707469a763e1fd3"/>
+			<dataarea name="flop" size="163840">
+				<rom name="demo11.dsk" size="163840" crc="f57d142d" sha1="f9c67904ddc8fa598353dcdcd8c0bc3eb4e91524"/>
 			</dataarea>
 		</part>
 	</software>
diff --git a/src/mame/drivers/abc80x.cpp b/src/mame/drivers/abc80x.cpp
index c4763923e9d..5300abf869c 100644
--- a/src/mame/drivers/abc80x.cpp
+++ b/src/mame/drivers/abc80x.cpp
@@ -193,7 +193,7 @@ READ8_MEMBER( abc800_state::read )
 {
 	uint8_t data = 0xff;
 	
-	if (offset < 0x4000 && !m_keydtr)
+	if (offset < 0x4000 && (!m_keydtr || m_fetch_charram))
 	{
 		data = m_video_ram[offset];
 	}
@@ -219,7 +219,7 @@ READ8_MEMBER( abc800_state::read )
 
 WRITE8_MEMBER( abc800_state::write )
 {
-	if (offset < 0x4000 && !m_keydtr)
+	if (offset < 0x4000 && (!m_keydtr || m_fetch_charram))
 	{
 		m_video_ram[offset] = data;
 	}
@@ -1121,7 +1121,7 @@ void abc800c_state::abc800c(machine_config &config)
 	subdevice<abcbus_slot_device>(ABCBUS_TAG)->set_default_option("abc830");
 
 	// internal ram
-	RAM(config, RAM_TAG).set_default_size("16K").set_extra_options("32K");
+	RAM(config, RAM_TAG).set_default_size("32K");
 }
 
 
@@ -1150,7 +1150,7 @@ void abc800m_state::abc800m(machine_config &config)
 	subdevice<abcbus_slot_device>(ABCBUS_TAG)->set_default_option("abc830");
 
 	// internal ram
-	RAM(config, RAM_TAG).set_default_size("16K").set_extra_options("32K");
+	RAM(config, RAM_TAG).set_default_size("32K");
 }
 
 
diff --git a/src/mame/video/abc800.cpp b/src/mame/video/abc800.cpp
index 2322030cba3..412890a5f18 100644
--- a/src/mame/video/abc800.cpp
+++ b/src/mame/video/abc800.cpp
@@ -12,10 +12,9 @@
 
 
 
-// these are needed because the MC6845 emulation does
+// this is needed because the MC6845 emulation does
 // not position the active display area correctly
 #define HORIZONTAL_PORCH_HACK   115
-#define VERTICAL_PORCH_HACK     29
 
 
 
@@ -188,7 +187,7 @@ void abc800m_state::hr_update(bitmap_rgb32 &bitmap, const rectangle &cliprect)
 
 	const pen_t *pen = m_palette->pens();
 
-	for (int y = m_hrs + VERTICAL_PORCH_HACK; y < std::min(cliprect.max_y + 1, m_hrs + VERTICAL_PORCH_HACK + 240); y++)
+	for (int y = m_hrs; y < std::min(cliprect.max_y + 1, m_hrs + 240); y++)
 	{
 		int x = HORIZONTAL_PORCH_HACK;