remived some redundant assignments (also fixes uninitialized array in karnov) (no whatsnew)

src/emu/debug/dvmemory.c

@@ -750,7 +750,6 @@ void debug_view_memory::set_bytes_per_chunk(UINT8 chunkbytes)
 	pos.m_shift += 8 * ((pos.m_address % m_bytes_per_chunk) ^ ((source.m_endianness == ENDIANNESS_LITTLE) ? 0 : (m_bytes_per_chunk - 1)));
 	pos.m_address -= pos.m_address % m_bytes_per_chunk;
 
-	m_recompute = m_update_pending = true;
 	end_update_and_set_cursor_pos(pos);
 }
 

src/emu/machine/8237dma.c

@@ -135,7 +135,6 @@ void i8237_device::device_reset()
 	m_command = 0;
 	m_drq = 0;
 	m_mask = 0x00;
-	m_status = 0x0F;
 	m_hrq = 0;
 	m_hlda = 0;
 	m_chan[0].m_mode = 0;

src/emu/machine/amigafdc.c

@@ -86,7 +86,6 @@ void amiga_fdc::device_reset()
 	adkcon = 0;
 	dmacon = 0;
 	dskpt = 0;
-	dsklen = 0x4000;
 	pre_dsklen = 0x4000;
 	dma_value = 0;
 	dma_state = DMA_IDLE;

src/emu/video/mc6845.c

@@ -814,17 +814,12 @@ void mc6845_device::device_start()
 	m_horiz_disp = m_vert_disp = 0;
 	m_vert_sync_pos = 0;
 	m_vert_total_adj = 0;
-	m_cursor_start_ras = m_cursor_end_ras = 0;
+	m_cursor_start_ras = m_cursor_end_ras = m_cursor_addr = 0;
 	m_cursor_blink_count = 0;
 	m_cursor_state = 0;
 	m_update_ready_bit = 0;
-	m_cursor_state = 0;
-	m_raster_counter = 0;
-	m_cursor_start_ras = 0;
-	m_cursor_end_ras = m_cursor_addr = 0;
 	m_line_address = 0;
 	m_current_disp_addr = 0;
-	m_line_address = 0;
 
 	save_item(NAME(m_hpixels_per_column));
 	save_item(NAME(m_register_address_latch));

src/mame/drivers/halleys.c

@@ -422,7 +422,7 @@ if (0) {
 
 	// clip objects against the visible area
 	yclip = y; xclip = x; hclip = h; wclip = w;
-	src_yskip = src_xskip = dst_skip = 0;
+	src_yskip = src_xskip = 0;
 	if (yclip < VIS_MINY) { src_yskip = VIS_MINY - yclip; yclip = VIS_MINY; hclip -= src_yskip; }
 	if (yclip + hclip > VIS_MAXY+1) { hclip = VIS_MAXY+1 - yclip; }
 	if (xclip < VIS_MINX) { src_xskip = VIS_MINX - xclip; xclip = VIS_MINX; wclip -= src_xskip; }

src/mame/drivers/karnov.c

@@ -799,7 +799,7 @@ static MACHINE_RESET( karnov )
 
 	state->m_flipscreen = 0;
 	state->m_scroll[0] = 0;
-	state->m_scroll[0] = 0;
+	state->m_scroll[1] = 0;
 }
 
 

src/mame/machine/acitya.c

@@ -33,7 +33,6 @@ static void acitya_decrypt_rom_8(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		/* Direct inversion */
 		newbyte  = (inverted_oldbyte & 0x80) >> 2;
@@ -68,7 +67,6 @@ static void acitya_decrypt_rom_9(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		/* Direct inversion */
 		newbyte  = (inverted_oldbyte & 0x80) >> 0;
@@ -101,7 +99,6 @@ static void acitya_decrypt_rom_A(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		newbyte  = (inverted_oldbyte & 0x80) >> 2;
 		newbyte |= (inverted_oldbyte & 0x40) >> 2;
@@ -134,7 +131,6 @@ static void acitya_decrypt_rom_B(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		/* Direct inversion */
 		newbyte  = (inverted_oldbyte & 0x80) >> 0;

src/mame/machine/theglobp.c

@@ -82,7 +82,6 @@ static void theglobp_decrypt_rom_8(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		/* Direct inversion */
 		newbyte  = (inverted_oldbyte & 0x04) >> 1;
@@ -118,7 +117,6 @@ static void theglobp_decrypt_rom_9(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		/* Direct inversion */
 		newbyte  = (inverted_oldbyte & 0x04) >> 1;
@@ -153,7 +151,6 @@ static void theglobp_decrypt_rom_A(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		/* Direct inversion */
 		newbyte  = (inverted_oldbyte & 0x04) >> 1;
@@ -188,7 +185,6 @@ static void theglobp_decrypt_rom_B(running_machine &machine)
 		/*  Note: D2 is inverted and connected to D1, D5 is inverted and
             connected to D0.  The other six data bits are converted by a
             PAL10H8 driven by the counter. */
-		newbyte = 0;
 
 		/* Direct inversion */
 		newbyte  = (inverted_oldbyte & 0x04) >> 1;