misc/freeway.cpp: added very preliminary drawing

src/mame/misc/freeway.cpp

@@ -9,13 +9,15 @@
 *********************************************************************/
 
 #include "emu.h"
+
 #include "bus/rs232/rs232.h"
 #include "cpu/i86/i86.h"
 #include "machine/ins8250.h"
 #include "machine/pit8253.h"
 #include "machine/pic8259.h"
 #include "machine/timekpr.h"
 #include "video/mc6845.h"
+
 #include "emupal.h"
 #include "screen.h"
 
@@ -31,6 +33,8 @@ class freeway_state : public driver_device
 		, m_pic(*this, "pic")
 		, m_charram(*this, "charram")
 		, m_colorram(*this, "colorram")
+		, m_gfx_rom(*this, "gfx")
+		, m_color_rom(*this, "cor")
 		, m_lamps(*this, "lamp%u", 1U)
 	{
 	}
@@ -56,6 +60,9 @@ class freeway_state : public driver_device
 	required_shared_ptr<u8> m_charram;
 	required_shared_ptr<u8> m_colorram;
 
+	required_region_ptr<u8> m_gfx_rom;
+	required_region_ptr<u8> m_color_rom;
+
 	output_finder<3> m_lamps;
 };
 
@@ -64,8 +71,32 @@ void freeway_state::machine_start()
 	m_lamps.resolve();
 }
 
+// TODO: just the minimum to show errors on screen
 MC6845_UPDATE_ROW(freeway_state::update_row)
 {
+	uint16_t x = 0;
+
+	for (uint8_t cx = 0; cx < x_count; cx++)
+	{
+		int const attr = m_colorram[ma & 0xfff];
+		int addr = ((m_charram[ma & 0xfff] | ((attr & 0x10) << 5)) << 3) | (ra & 0x07);
+
+		uint8_t const *const data = m_gfx_rom;
+
+		for (int i = 7; i >= 0; i--)
+		{
+			int col = 0;
+			col |= (BIT(data[0x0000 | addr], i) << 2);
+			col |= (BIT(data[0x8000 | addr], i) << 1);
+			col |= (BIT(data[0x10000 | addr], i) << 0);
+
+			const u32 pen = (BIT(col, 2) ? 0xff : 0) | (BIT(col, 1) ? 0xff00 : 0) | (BIT(col, 0) ? 0xff0000 : 0);
+			bitmap.pix(y, x) = pen;
+
+			x++;
+		}
+		ma++;
+	}
 }
 
 void freeway_state::lamps_w(u8 data)
@@ -83,8 +114,8 @@ void freeway_state::mem_map(address_map &map)
 {
 	map(0x00000, 0x07fff).ram();
 	map(0x08000, 0x09fff).rw("timekpr", FUNC(timekeeper_device::read), FUNC(timekeeper_device::write));
-	map(0xa0000, 0xa0fff).ram().share("charram");
-	map(0xa4000, 0xa4fff).ram().share("colorram");
+	map(0xa0000, 0xa0fff).ram().share(m_charram);
+	map(0xa4000, 0xa4fff).ram().share(m_colorram);
 	map(0xf0000, 0xfffff).rom().region("program", 0);
 }
 
@@ -95,6 +126,7 @@ void freeway_state::io_map(address_map &map)
 	map(0x0040, 0x0047).rw("uart", FUNC(ns16450_device::ins8250_r), FUNC(ns16450_device::ins8250_w));
 	map(0x00a3, 0x00a3).w(FUNC(freeway_state::lamps_w));
 	map(0x00d0, 0x00d0).portr("CONFIG");
+	map(0x00d1, 0x00d1).portr("INPUTS");
 	map(0x03d0, 0x03d0).w("crtc", FUNC(mc6845_device::address_w));
 	map(0x03d1, 0x03d1).w("crtc", FUNC(mc6845_device::register_w));
 }
@@ -107,6 +139,30 @@ static INPUT_PORTS_START(freeway)
 	PORT_BIT(0x08, 0x08, IPT_UNKNOWN)
 	PORT_BIT(0xf6, 0xf6, IPT_UNKNOWN) // probably unused
 
+	PORT_START("INPUTS")
+	PORT_DIPNAME( 0x01, 0x01, "IN0.1" )
+	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_GAMBLE_BOOK ) // brings up the 'auditoria' screen in freeway
+	PORT_DIPNAME( 0x04, 0x04, "IN0.3" )
+	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x08, 0x08, "IN0.4" )
+	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x10, 0x10, "IN0.5" ) // increases the 'num dias' value in freeway
+	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x20, 0x20, "IN0.6" )
+	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x40, 0x40, "IN0.7" )
+	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x80, 0x80, "IN0.8" )
+	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+
 	PORT_START("RESET")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_MEMORY_RESET) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, freeway_state, nmi_w)
 INPUT_PORTS_END