mm2: update notes about turbokit, chess*: small tweaks

src/mame/hegenerglaser/mm2.cpp

@@ -7,8 +7,9 @@ Mephisto MM II series chesscomputers
 
 TODO:
 - rebel5 unknown read from 0x4002, looks like leftover bookrom check
-- need to emulate TurboKit properly, also for mm5p (it's not as simple as a CPU
+- need to emulate TurboKit properly as a slot device, also for mm5p (it's not as
-  overclock plus ROM patch)
+  simple as a CPU overclock), TK20 EPROM is dumped for the common version (6502
+  Mephisto/Fidelity/Novag/etc.) and for the SciSys Maestro/Analyst version
 - correct rom labels (applies to the filenames with .bin extension)
 
 ================================================================================
@@ -38,6 +39,9 @@ There is an undumped MM V Turbo Kit, which will be the exact same except for loc
 of the patches. The mm5tk just needs the normal mm5 ROM swapped out for that one to
 blinks the LEDs a little slower.
 
+Correction: The real TK20 TurboKit does not patch the ROM, so mm4tk (and a possible
+mm5 version of this) is more likely a SteveUK hack.
+
 The MM V prototype was the program that Ed Schröder participated with as "Rebel" at
 the 1989 WMCCC in Portorose. It was used with the TK20 TurboKit.
 For more information, see: http://chesseval.com/ChessEvalJournal/PrototypeMMV.htm

src/mame/novag/svip.cpp

@@ -265,7 +265,7 @@ void svip_state::svip(machine_config &config)
 
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_SVG));
 	screen.set_refresh_hz(60);
-	screen.set_size(1920/3, 606/3);
+	screen.set_size(1920/2.5, 606/2.5);
 	screen.set_visarea_full();
 
 	config.set_default_layout(layout_novag_svip);

src/mame/saitek/edames.cpp

@@ -202,7 +202,7 @@ void edames_state::p7_w(u8 data)
 	update_display();
 
 	// P74: speaker out
-	m_dac->write(BIT(data, 4));
+	m_dac->write(BIT(~data, 4));
 }
 
 

src/mame/saitek/intchess.cpp

@@ -123,10 +123,10 @@ INPUT_CHANGED_MEMBER(intchess_state::reset_button)
 
 void intchess_state::init_palette(palette_device &palette) const
 {
-	palette.set_pen_color(0, 0xb0, 0xd0, 0xff);
+	palette.set_pen_color(0, 0xb0, 0xd0, 0xff); // cyan
-	palette.set_pen_color(1, 0x00, 0x00, 0x00);
+	palette.set_pen_color(1, 0x00, 0x00, 0x00); // black
-	palette.set_pen_color(2, 0x88, 0xa8, 0x50);
+	palette.set_pen_color(2, 0x88, 0xa8, 0x50); // green
-	palette.set_pen_color(3, 0xff, 0xff, 0xff);
+	palette.set_pen_color(3, 0xff, 0xff, 0xff); // white
 }
 
 u32 intchess_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)

src/mame/saitek/leonardo.cpp

@@ -14,10 +14,10 @@ hardware button that disconnects the battery), there is no known method to
 force a cold boot. So if NVRAM somehow becomes broken, remove the NVRAM files.
 
 They called the expansion capability "OSA", for "Open Systems Architecture".
-A serial port for linking to a PC, and a parallel port for expansion modules.
+A serial port for linking to a PC or homecomputer, and a parallel port for
-The expansion modules are basically entire chesscomputers, making the whole
+expansion modules. The expansion modules are basically entire chesscomputers,
-thing combined a 'dual brain' chesscomputer. The embedded chess engine is by
+making the whole thing combined a 'dual brain' chesscomputer. The embedded chess
-Julio Kaplan and Craig Barnes, same as the one in SciSys Turbo S-24K.
+engine is by Julio Kaplan and Craig Barnes, same as the one in Turbo S-24K.
 
 OSA serial link transmission format: 1 start bit, 8 data bits, 1 stop bit, no
 parity. The default baudrate is 1200. To establish a connection, command "o" must