Update a7800.cpp

Proper external source reference

README.md

@@ -6,8 +6,17 @@ A7800 is a fork of the MAME Atari 7800 driver, with several enhancements added.
 
 * Support for emulation of Proline Joysticks, VCS Joysticks, Lightguns, Paddles, Driving Controllers, Keypads, Trak-Balls, Amiga Mice, and ST Mice.
 * Maria DMA timing has been improved further, with the addition of accurate DMA hole penalties.
-* Improved saturated/normalized colors with palette selection.
-* Streamlined UI including menu options to have an Atari 7800 system focus.
 * A bug in the existing RIOT emulation has been fixed.
+* POKEY sound emulation improvements.
+* SALLY (CPU) and MARIA (Graphics chip) performance adjustments.
+* Selectable and improved palettes with enhanced screen options.
+* Audio indication of no ROM loaded silenced.
+* BIOS file(s) no longer required and made optional.
+* Streamlined UI including menu options to have an Atari 7800 system focus.
+* Implementation of XM control registers updated.
+* Graphical register updates made mid-scanline are now displayed mid-scanline.
+* Bankset bankswitching support added.
+* POKEY@800 added for non-banked, supergame, and bankset formats.
+* Machine targets a7800dev and a7800pdev added, which display DMA usage per-scanline.
 
 MAME compatibility and syntax has been maintained, to allow for the reuse of MAME configuration files and front-ends.

makefile

@@ -1553,14 +1553,14 @@ endif
 
 ifeq (posix,$(SHELLTYPE))
 $(GENDIR)/version.cpp: $(GENDIR)/git_desc | $(GEN_FOLDERS)
-	@echo '#define BARE_BUILD_VERSION "5.0"' > $@
+	@echo '#define BARE_BUILD_VERSION "5.2"' > $@
 	@echo 'extern const char bare_build_version[];' >> $@
 	@echo 'extern const char build_version[];' >> $@
 	@echo 'const char bare_build_version[] = BARE_BUILD_VERSION;' >> $@
 	@echo 'const char build_version[] = BARE_BUILD_VERSION " A7800";' >> $@
 else
 $(GENDIR)/version.cpp: $(GENDIR)/git_desc
-	@echo #define BARE_BUILD_VERSION "5.0" > $@
+	@echo #define BARE_BUILD_VERSION "5.2" > $@
 	@echo extern const char bare_build_version[]; >> $@
 	@echo extern const char build_version[]; >> $@
 	@echo const char bare_build_version[] = BARE_BUILD_VERSION; >> $@

makefile-osx

@@ -1559,14 +1559,14 @@ endif
 
 ifeq (posix,$(SHELLTYPE))
 $(GENDIR)/version.cpp: $(GENDIR)/git_desc | $(GEN_FOLDERS)
-	@echo '#define BARE_BUILD_VERSION "5.0"' > $@
+	@echo '#define BARE_BUILD_VERSION "5.2"' > $@
 	@echo 'extern const char bare_build_version[];' >> $@
 	@echo 'extern const char build_version[];' >> $@
 	@echo 'const char bare_build_version[] = BARE_BUILD_VERSION;' >> $@
 	@echo 'const char build_version[] = BARE_BUILD_VERSION " A7800";' >> $@
 else
 $(GENDIR)/version.cpp: $(GENDIR)/git_desc
-	@echo #define BARE_BUILD_VERSION "5.0" > $@
+	@echo #define BARE_BUILD_VERSION "5.2" > $@
 	@echo extern const char bare_build_version[]; >> $@
 	@echo extern const char build_version[]; >> $@
 	@echo const char bare_build_version[] = BARE_BUILD_VERSION; >> $@

src/devices/bus/a7800/a78_slot.cpp

@@ -517,7 +517,7 @@ image_init_result a78_cart_slot_device::call_load()
 			m_cart->rom_alloc(len, tag());
 			fread(m_cart->get_rom_base(), len);
 
-			if (m_type == A78_TYPE6 || m_type == A78_TYPE8)
+			if (m_type == A78_TYPE6 || m_type == A78_TYPE8 || m_type == A78_TYPE6_POK800 )
 				m_cart->ram_alloc(0x4000);
 			if (m_type == A78_MEGACART || (m_type == A78_BANKSET_SG_BANKRAM) || (m_type == A78_BANKSET_SG_BANKRAM_POK800) || (m_type == A78_BANKSET_BANKRAM) || (m_type == A78_BANKSET_BANKRAM_POK800) || (m_type >= A78_VERSABOARD && m_type <= A78_VERSA_POK450))
 				m_cart->ram_alloc(0x8000);

src/devices/bus/a7800/rom.cpp

@@ -47,7 +47,7 @@ DEFINE_DEVICE_TYPE(A78_ROM_P450_SG9,    a78_rom_p450_sg9_device,    "a78_p450_ta
 DEFINE_DEVICE_TYPE(A78_ROM_P800,        a78_rom_p800_device,        "a78_p800_t0",  "Atari 7800 ROM Carts w/POKEY @ 0x0800")
 DEFINE_DEVICE_TYPE(A78_ROM_P800_POKEY,  a78_rom_p800_pokey_device,  "a78_p800_t1",  "Atari 7800 ROM Carts w/no Bankswitch + POKEY + POKEY @ 0x0800")
 DEFINE_DEVICE_TYPE(A78_ROM_P800_SG,     a78_rom_p800_sg_device,     "a78_p800_t2",  "Atari 7800 ROM Carts w/SuperGame Bankswitch + POKEY @ 0x0800")
-DEFINE_DEVICE_TYPE(A78_ROM_P800_SG_RAM, a78_rom_p800_sg_ram_device, "a78_p800_t6",  "Atari 7800 ROM Carts w/SuperGame Bankswitch + RAM + POKEY @ 0x0800")
+DEFINE_DEVICE_TYPE(A78_ROM_P800_SG_RAM, a78_rom_p800_sg_ram_device, "a78_p800_t6",  "Atari 7800 ROM Carts w/SuperGame Bankswitch + RAM0 0x800")
 DEFINE_DEVICE_TYPE(A78_ROM_P800_SG9,    a78_rom_p800_sg9_device,    "a78_p800_ta",  "Atari 7800 ROM Carts w/SuperGame 9Banks + POKEY @ 0x0800")
 
 

src/devices/sound/pokey.cpp

@@ -2,13 +2,21 @@
 // copyright-holders:Brad Oliver, Eric Smith, Juergen Buchmueller
 /*****************************************************************************
  *
- *  POKEY chip emulator 4.7 (a7800)
+ *  POKEY chip emulator 4.9 (a7800)
  *
  *  Based on original info found in Ron Fries' Pokey emulator,
  *  with additions by Brad Oliver, Eric Smith and Juergen Buchmueller,
  *  paddle (a/d conversion) details from the Atari 400/800 Hardware Manual.
  *  Polynomial algorithms according to info supplied by Perry McFarlane.
  *
+ *  4.9 (a7800):
+ *  - Two-tone mode updated for better accuracy. 
+ *
+ *  4.8 (a7800):
+ *  - Poly5 related modes had a pitch shift issue. The poly4/5 init routine 
+ *    was replaced with one based on Altira's implementation, which resolved
+ *    the issue.
+ *
  *  4.7 (a7800):
  *    [1] https://www.virtualdub.org/downloads/Altirra%20Hardware%20Reference%20Manual.pdf
  *  - updated to reflect that borrowing cycle delays only impacts voices
@@ -91,9 +99,9 @@
 #define POKEY_DEFAULT_GAIN (32767/11/4)
 
 #define VERBOSE         0
-#define VERBOSE_SOUND   0
+#define VERBOSE_SOUND   1
 #define VERBOSE_TIMER   0
-#define VERBOSE_POLY    1
+#define VERBOSE_POLY    0
 #define VERBOSE_RAND    0
 
 #define LOG(x) do { if (VERBOSE) logerror x; } while (0)
@@ -242,8 +250,8 @@ void pokey_device::device_start()
 	 */
 
 	/* initialize the poly counters */
-	poly_init_4_5(m_poly4, 4, 1, 0);
-	poly_init_4_5(m_poly5, 5, 2, 1);
+	poly_init_4_5(m_poly4, 4);
+	poly_init_4_5(m_poly5, 5);
 
 	/* initialize 9 / 17 arrays */
 	poly_init_9_17(m_poly9,   9);
@@ -258,7 +266,7 @@ void pokey_device::device_start()
 	 */
 
 	m_KBCODE = 0x09;         /* Atari 800 'no key' */
-	m_SKCTL = SK_RESET;  /* let the RNG run after reset */
+	m_SKCTL = 0;
 	m_SKSTAT = 0;
 	/* This bit should probably get set later. Acid5200 pokey_setoc test tests this. */
 	m_IRQST = IRQ_SEROC;
@@ -661,41 +669,6 @@ uint32_t pokey_device::step_one_clock(void)
 			step_keyboard();
 	}
 
-	if (m_channel[CHAN1].check_borrow())
-	{
-		int isJoined = (m_AUDCTL & CH12_JOINED);
-
-		if (isJoined)
-			m_channel[CHAN2].inc_chan(1);
-		else
-			m_channel[CHAN1].reset_channel();
-
-		process_channel(CHAN1);
-
-		// check if some of the requested timer interrupts are enabled
-		if ((m_IRQST & IRQ_TIMR1) && !m_irq_f.isnull())
-			m_irq_f(IRQ_TIMR1);
-	}
-
-
-	if (m_channel[CHAN2].check_borrow())
-	{
-		int isJoined = (m_AUDCTL & CH12_JOINED);
-		if (isJoined)
-			m_channel[CHAN1].reset_channel();
-
-		if (m_SKCTL & SK_TWOTONE)
-			m_channel[CHAN1].reset_channel();
-
-		m_channel[CHAN2].reset_channel();
-
-		process_channel(CHAN2);
-
-		// check if some of the requested timer interrupts are enabled
-		if ((m_IRQST & IRQ_TIMR2) && !m_irq_f.isnull())
-				m_irq_f(IRQ_TIMR2);
-	}
-
 	if (m_channel[CHAN3].check_borrow())
 	{
 		int isJoined = (m_AUDCTL & CH34_JOINED);
@@ -703,6 +676,7 @@ uint32_t pokey_device::step_one_clock(void)
 			m_channel[CHAN4].inc_chan(1);
 		else
 			m_channel[CHAN3].reset_channel();
+
 		process_channel(CHAN3);
 		/* is this a filtering channel (3/4) and is the filter active? */
 		if (m_AUDCTL & CH1_FILTER)
@@ -728,6 +702,42 @@ uint32_t pokey_device::step_one_clock(void)
 			m_irq_f(IRQ_TIMR4);
 	}
 
+	if ( (m_SKCTL & SK_TWOTONE) && (m_channel[CHAN2].m_borrow_cnt == 1) )
+		m_channel[CHAN1].reset_channel();
+
+	if (m_channel[CHAN1].check_borrow())
+	{
+		int isJoined = (m_AUDCTL & CH12_JOINED);
+
+		if (isJoined)
+			m_channel[CHAN2].inc_chan(1);
+		else
+			m_channel[CHAN1].reset_channel();
+
+		// TODO: If two-tone is enabled *and* serial output == 1 then reset the channel 2 timer.
+
+		process_channel(CHAN1);
+
+		// check if some of the requested timer interrupts are enabled
+		if ((m_IRQST & IRQ_TIMR1) && !m_irq_f.isnull())
+			m_irq_f(IRQ_TIMR1);
+	}
+
+	if (m_channel[CHAN2].check_borrow())
+	{
+		int isJoined = (m_AUDCTL & CH12_JOINED);
+		if (isJoined)
+			m_channel[CHAN1].reset_channel();
+
+		m_channel[CHAN2].reset_channel();
+
+		process_channel(CHAN2);
+
+		// check if some of the requested timer interrupts are enabled
+		if ((m_IRQST & IRQ_TIMR2) && !m_irq_f.isnull())
+				m_irq_f(IRQ_TIMR2);
+	}
+
 
 	for (ch = 0; ch < 4; ch++)
 	{
@@ -1230,38 +1240,48 @@ void pokey_device::vol_init()
 
 }
 
-void pokey_device::poly_init_4_5(uint32_t *poly, int size, int xorbit, int invert)
+void pokey_device::poly_init_4_5(uint32_t *poly, int size)
 {
         int mask = (1 << size) - 1;
         int i;
         uint32_t lfsr = 0;
 
         LOG_POLY(("poly %d\n", size));
-        for( i = 0; i < mask; i++ )
-        {
-                // calculate next bit
-                int in = !((lfsr >> 0) & 1) ^ ((lfsr >> xorbit) & 1);
-                lfsr = lfsr >> 1;
-                lfsr = (in << (size-1)) | lfsr;
-                *poly = lfsr ^ invert;
-                LOG_POLY(("%05x: %02x\n", i, *poly));
-                poly++;
-        }
+
+	if(size==4)
+	{
+        	for( i = 0; i < mask; i++ )
+		{
+			lfsr = (lfsr+lfsr) + (~((lfsr >> 2) ^ (lfsr >> 3)) & 1);
+                	*poly = lfsr & mask;
+			poly++;
+		}
+	}
+	if(size==5)
+	{
+        	for( i = 0; i < mask; i++ )
+		{
+			lfsr = (lfsr+lfsr) + (~((lfsr >> 2) ^ (lfsr >> 4)) & 1);
+                	*poly = lfsr & mask;
+			poly++;
+		}
+	}
 }
 
 void pokey_device::poly_init_9_17(uint32_t *poly, int size)
 {
 	int mask = (1 << size) - 1;
 	int i;
-	uint32_t lfsr =mask;
+	uint32_t lfsr = mask;
 
 	LOG_RAND(("rand %d\n", size));
 
+
+
 	if (size == 17)
 	{
 		for( i = 0; i < mask; i++ )
 		{
-			// calculate next bit
 			int in8 = ((lfsr >> 8) & 1) ^ ((lfsr >> 13) & 1);
 			int in = (lfsr & 1);
 			lfsr = lfsr >> 1;
@@ -1272,7 +1292,7 @@ void pokey_device::poly_init_9_17(uint32_t *poly, int size)
 			poly++;
 		}
 	}
-	else
+	else // size == 9
 	{
 		for( i = 0; i < mask; i++ )
 		{

src/devices/sound/pokey.h

@@ -268,7 +268,7 @@ private:
 		uint8_t m_div2;           /* division by 2 */
 
 		inline void sample(void)            { m_filter_sample = m_output; }
-		inline void reset_channel(void)     { m_counter = m_AUDF ^ 0xff; }
+		inline void reset_channel(void)     { m_counter = m_AUDF ^ 0xff; m_borrow_cnt = 0;  }
 
 		inline void inc_chan(int cycles)
 		{
@@ -301,7 +301,7 @@ private:
 	void step_keyboard();
 	void step_pot();
 
-	void poly_init_4_5(uint32_t *poly, int size, int xorbit, int invert);
+	void poly_init_4_5(uint32_t *poly, int size);
 	void poly_init_9_17(uint32_t *poly, int size);
 
 	void vol_init();

src/frontend/mame/ui/ui.cpp

@@ -1442,7 +1442,7 @@ std::vector<ui::menu_item> mame_ui_manager::slider_init(running_machine &machine
 		std::string str = string_format(_("%1$s Brightness"), screen_desc);
 		sliders.push_back(slider_alloc(machine, SLIDER_ID_BRIGHTNESS + slider_index, str.c_str(), 100, 1000, 2000, 10, param));
 		str = string_format(_("%1$s Contrast"), screen_desc);
-		sliders.push_back(slider_alloc(machine, SLIDER_ID_CONTRAST + slider_index, str.c_str(), 100, 1000, 2000, 50, param));
+		sliders.push_back(slider_alloc(machine, SLIDER_ID_CONTRAST + slider_index, str.c_str(), 100, 1000, 2000, 10, param));
 		str = string_format(_("%1$s Gamma"), screen_desc);
 		sliders.push_back(slider_alloc(machine, SLIDER_ID_GAMMA + slider_index, str.c_str(), 100, 1000, 3000, 50, param));
 
@@ -1453,13 +1453,13 @@ std::vector<ui::menu_item> mame_ui_manager::slider_init(running_machine &machine
 		//str = string_format(_("%1$s Horiz Position"), screen_desc);
 		str = string_format(_("%1$s Horizontal Position: Shift Left <-> Default <-> Shift Right"), screen_desc);
 		sliders.push_back(slider_alloc(machine, SLIDER_ID_XOFFSET + slider_index, str.c_str(), -500, defxoffset, 500, 1, param));
+		//str = string_format(_("%1$s Vert Stretch"), screen_desc);
+		str = string_format(_("%1$s Height: <-- Crop Less Lines | Crop More Lines -->"), screen_desc);
+		//sliders.push_back(slider_alloc(machine, SLIDER_ID_YSCALE + slider_index, str.c_str(), 500, defyscale, 1500, 2, param));
+		sliders.push_back(slider_alloc(machine, SLIDER_ID_YSCALE + slider_index, str.c_str(), 1000, defyscale, 1216, 9, param));
 		//str = string_format(_("%1$s Vert Position"), screen_desc);
 		str = string_format(_("%1$s Vertical Position: Shift Up <-> Default <-> Shift Down"), screen_desc);
 		sliders.push_back(slider_alloc(machine, SLIDER_ID_YOFFSET + slider_index, str.c_str(), -500, defyoffset, 500, 1, param));
-		//str = string_format(_("%1$s Vert Stretch"), screen_desc);
-		str = string_format(_("%1$s Height Lines Cropped: 0 <-> 8 <-> 16 <-> 24 <-> 32 <-> 40 <-> 48"), screen_desc);
-		//sliders.push_back(slider_alloc(machine, SLIDER_ID_YSCALE + slider_index, str.c_str(), 500, defyscale, 1500, 2, param));
-		sliders.push_back(slider_alloc(machine, SLIDER_ID_YSCALE + slider_index, str.c_str(), 1000, defyscale, 1216, 36, param));	
 		slider_index++;
 	}
 

src/mame/mame.lst

@@ -257,13 +257,13 @@ a6809                           //
 a7150                           //
 
 @source:a7800.cpp
-a7800							// Atari 7800 NTSC Cool
-a7800u1							// Atari 7800 NTSC Warm
-a7800u2							// Atari 7800 NTSC Hot
-a7800dev						// Atari 7800 NTSC Hot
+a7800							// Atari 7800 NTSC Hot
+a7800a1							// Atari 7800 NTSC Warm
+a7800a2							// Atari 7800 NTSC Cool
+a7800dev						// Atari 7800 NTSC Developer Mode
 a7800p							// Atari 7800 PAL Cool
-a7800pu1						// Atari 7800 PAL Warm
-a7800pu2						// Atari 7800 PAL Hot
+a7800pa1						// Atari 7800 PAL Warm
+a7800pa2						// Atari 7800 PAL Hot
 a7800pdev						// Atari 7800 PAL Developer Mode
 
 @source:aa310.cpp

src/mame/video/maria.cpp

@@ -2,49 +2,57 @@
 // copyright-holders:Dan Boris, Fabio Priuli, Mike Saarna, Robert Tuccitto
 /***************************************************************************
 
-  Atari MARIA video emulation
+Atari MARIA video emulation.
 
+Dan Boris
 
-  - some history:
+History:
 
-    2014-12-01 Mike Saarna, Robert Tuccitto Implemented "colorburst kill" bit
-                of the MARIA CTRL register.
+2002/05/12 kubecj
+        -Added cases for 0x01-160A, 0x05-160B as stated by docs.
 
-    2014-10-05 Mike Saarna, Robert Tuccitto Last Line DMA value corrected
-                to 6. GCC and Atari docs both show a difference between
-                Other Line and Last Line as +6 at the lowest part of the
-                range.
-                Blank scanlines are drawn when DMA is off, like real
-                hardware.
-                If MARIA hits the DMA limit, the CPU doesn't run until
-                the next scanline.
+2002/05/13 kubecj
+        -Fixed 320C mode - displayed 2 pixels instead of one!
+        -Noticed that Jinks uses 0x02-320D mode, implemented the
+         mode - completely unsure if good!
+        -Implemented some Maria CTRL variables.
 
-    2014-09-03 Mike Saarna, Robert Tuccitto reorganized DMA penalties to
-                support new rendering timeout code.
+2002/05/14 kubecj
+        -Vblank dma stop fix.
 
-    2014-08-29 Mike Saarna Timeout rendering added.
+2003/06/23 ericball
+        -Kangaroo mode & 320 mode & other stuff.
 
-    2014-08-26 Fabio Priuli Converted to device
+2013/05/08 huygens
+        -Rewrite to emulate line ram buffers (mostly fixes Kung-Fu Master).
+        -Started DMA cycle stealing implementation.
 
-    2014-05-06 Mike Saarna Added interrupts to DMA cycle eating. Updates to
-                LL, OL, and spin accounting for HALT behavior.
+2014/03/24 Mike Saarna
+        -Fixed DMA regarding startup, shutdown and cycle stealing.
 
-    2014-03-24 Mike Saarna Fixed DMA regarding startup, shutdown and
-                            cycle stealing.
+2014/05/06 Mike Saarna
+        -Added interrupts to DMA cycle eating.
+        -Updates to LL, OL, and spin accounting for HALT behavior.
 
-    2013-05-08 huygens rewrite to emulate line ram buffers (mostly fixes Kung-Fu Master
-                            Started DMA cycle stealing implementation
+2014/08/26 Fabio Priuli
+        -Converted to device.
 
-    2003-06-23 ericball Kangaroo mode & 320 mode & other stuff
+2014/08/29 Mike Saarna
+        -Timeout rendering added.
 
-    2002-05-14 kubecj vblank dma stop fix
+2014/09/03 Mike Saarna/Robert Tuccitto
+        -Reorganized DMA penalties to support new rendering timeout code.
 
-    2002-05-13 kubecj   fixed 320C mode (displayed 2 pixels instead of one!)
-                            noticed that Jinks uses 0x02-320D mode
-                            implemented the mode - completely unsure if good!
-                            implemented some Maria CTRL variables
+2014/10/05 Mike Saarna/Robert Tuccitto
+        -Last Line DMA value corrected to 6. GCC and Atari docs both show
+         a difference between Other Line and Last Line as +6 at the lowest
+         part of the range.
+        -Blank scanlines are drawn when DMA is off, like real hardware.
+        -If MARIA hits the DMA limit, the CPU doesn't run until the next 
+         scanline.
 
-    2002-05-12 kubecj added cases for 0x01-160A, 0x05-160B as stated by docs
+2014/12/01 Mike Saarna/Robert Tuccitto
+        -Implemented "colorburst kill" bit of the MARIA CTRL register.
 
 ***************************************************************************/