Arcade-Druaga.sv

//============================================================================
//  Arcade: The Tower of Druaga
//
//  Original implimentation and port to MiSTer by MiSTer-X 2019
//============================================================================

module emu
(
	//Master input clock
	input         CLK_50M,

	//Async reset from top-level module.
	//Can be used as initial reset.
	input         RESET,

	//Must be passed to hps_io module
	inout  [44:0] HPS_BUS,

	//Base video clock. Usually equals to CLK_SYS.
	output        VGA_CLK,

	//Multiple resolutions are supported using different VGA_CE rates.
	//Must be based on CLK_VIDEO
	output        VGA_CE,

	output  [7:0] VGA_R,
	output  [7:0] VGA_G,
	output  [7:0] VGA_B,
	output        VGA_HS,
	output        VGA_VS,
	output        VGA_DE,    // = ~(VBlank | HBlank)

	//Base video clock. Usually equals to CLK_SYS.
	output        HDMI_CLK,

	//Multiple resolutions are supported using different HDMI_CE rates.
	//Must be based on CLK_VIDEO
	output        HDMI_CE,

	output  [7:0] HDMI_R,
	output  [7:0] HDMI_G,
	output  [7:0] HDMI_B,
	output        HDMI_HS,
	output        HDMI_VS,
	output        HDMI_DE,   // = ~(VBlank | HBlank)
	output  [1:0] HDMI_SL,   // scanlines fx

	//Video aspect ratio for HDMI. Most retro systems have ratio 4:3.
	output  [7:0] HDMI_ARX,
	output  [7:0] HDMI_ARY,

	output        LED_USER,  // 1 - ON, 0 - OFF.

	// b[1]: 0 - LED status is system status OR'd with b[0]
	//       1 - LED status is controled solely by b[0]
	// hint: supply 2'b00 to let the system control the LED.
	output  [1:0] LED_POWER,
	output  [1:0] LED_DISK,

	output [15:0] AUDIO_L,
	output [15:0] AUDIO_R,
	output        AUDIO_S    // 1 - signed audio samples, 0 - unsigned
);

assign LED_USER  = ioctl_download;
assign LED_DISK  = 0;
assign LED_POWER = 0;

assign HDMI_ARX = status[1] ? 8'd16 : status[2] ? 8'd4 : 8'd3;
assign HDMI_ARY = status[1] ? 8'd9  : status[2] ? 8'd3 : 8'd4;

`include "build_id.v" 
localparam CONF_STR = {
	"A.Druaga;;",
	"F,rom;", // allow loading of alternate ROMs
   "-;",
	"O1,Aspect Ratio,Original,Wide;",
	"O2,Orientation,Vert,Horz;",
	"O35,Scandoubler Fx,None,HQ2x,CRT 25%,CRT 50%,CRT 75%;",
	//"-;",
	//"OAB,Life,3,2,1,5;",
	//"OI,Cabinet,Upright,Cocktail;",
	//"-;",
	//"OH,Service Mode,Off,On;",
	"-;",
	"R0,Reset;",
	"J1,Trig1,Trig2,Start 1P,Start 2P,Coin;",
	"V,v",`BUILD_DATE
};


////////////////////   CLOCKS   ///////////////////

wire clk_hdmi;
wire clk_48M;
wire clk_sys = clk_hdmi;

pll pll
(
	.rst(0),
	.refclk(CLK_50M),
	.outclk_0(clk_48M),
	.outclk_1(clk_hdmi)
);

///////////////////////////////////////////////////

wire [31:0] status;
wire  [1:0] buttons;
wire        forced_scandoubler;

wire        ioctl_download;
wire        ioctl_wr;
wire [24:0] ioctl_addr;
wire  [7:0] ioctl_dout;

wire [10:0] ps2_key;
wire [15:0] joystk1, joystk2;

hps_io #(.STRLEN($size(CONF_STR)>>3)) hps_io
(
	.clk_sys(clk_sys),
	.HPS_BUS(HPS_BUS),

	.conf_str(CONF_STR),

	.buttons(buttons),
	.status(status),
	.forced_scandoubler(forced_scandoubler),

	.ioctl_download(ioctl_download),
	.ioctl_wr(ioctl_wr),
	.ioctl_addr(ioctl_addr),
	.ioctl_dout(ioctl_dout),

	.joystick_0(joystk1),
	.joystick_1(joystk2),
	.ps2_key(ps2_key)
);

wire       pressed = ps2_key[9];
wire [8:0] code    = ps2_key[8:0];
always @(posedge clk_sys) begin
	reg old_state;
	old_state <= ps2_key[10];
	
	if(old_state != ps2_key[10]) begin
		casex(code)
			'hX75: btn_up          <= pressed; // up
			'hX72: btn_down        <= pressed; // down
			'hX6B: btn_left        <= pressed; // left
			'hX74: btn_right       <= pressed; // right
			'h029: btn_trig1       <= pressed; // space
			'h014: btn_trig2       <= pressed; // ctrl
			'h005: btn_one_player  <= pressed; // F1
			'h006: btn_two_players <= pressed; // F2

			// JPAC/IPAC/MAME Style Codes
			'h016: btn_start_1     <= pressed; // 1
			'h01E: btn_start_2     <= pressed; // 2
			'h02E: btn_coin_1      <= pressed; // 5
			'h036: btn_coin_2      <= pressed; // 6
			'h02D: btn_up_2        <= pressed; // R
			'h02B: btn_down_2      <= pressed; // F
			'h023: btn_left_2      <= pressed; // D
			'h034: btn_right_2     <= pressed; // G
			'h01C: btn_trig1_2     <= pressed; // A
			'h01B: btn_trig2_2     <= pressed; // S
		endcase
	end
end

reg btn_up    = 0;
reg btn_down  = 0;
reg btn_right = 0;
reg btn_left  = 0;
reg btn_trig1 = 0;
reg btn_trig2 = 0;
reg btn_one_player  = 0;
reg btn_two_players = 0;

reg btn_start_1 = 0;
reg btn_start_2 = 0;
reg btn_coin_1  = 0;
reg btn_coin_2  = 0;
reg btn_up_2    = 0;
reg btn_down_2  = 0;
reg btn_left_2  = 0;
reg btn_right_2 = 0;
reg btn_trig1_2  = 0;
reg btn_trig2_2  = 0;


//wire bCabinet  = status[18];
wire bCabinet  = 1'b0;	// (upright only)

wire m_up2     = btn_up_2    | joystk2[3];
wire m_down2   = btn_down_2  | joystk2[2];
wire m_left2   = btn_left_2  | joystk2[1];
wire m_right2  = btn_right_2 | joystk2[0];
wire m_trig21  = btn_trig1_2 | joystk2[4];
wire m_trig22  = btn_trig2_2 | joystk2[5];

wire m_start1  = btn_one_player  | joystk1[6] | joystk2[6] | btn_start_1;
wire m_start2  = btn_two_players | joystk1[7] | joystk2[7] | btn_start_2;

wire m_up1     = btn_up      | joystk1[3] | (bCabinet ? 1'b0 : m_up2);
wire m_down1   = btn_down    | joystk1[2] | (bCabinet ? 1'b0 : m_down2);
wire m_left1   = btn_left    | joystk1[1] | (bCabinet ? 1'b0 : m_left2);
wire m_right1  = btn_right   | joystk1[0] | (bCabinet ? 1'b0 : m_right2);
wire m_trig11  = btn_trig1   | joystk1[4] | (bCabinet ? 1'b0 : m_trig21);
wire m_trig12  = btn_trig2   | joystk1[5] | (bCabinet ? 1'b0 : m_trig22);

wire m_coin1   = btn_one_player | btn_coin_1 | joystk1[8];
wire m_coin2   = btn_two_players| btn_coin_2 | joystk2[8];


///////////////////////////////////////////////////

wire hblank, vblank;
wire ce_vid;
wire hs, vs;
wire [3:0] r,g,b;

reg ce_pix;
always @(posedge clk_hdmi) begin
	reg old_clk;
	old_clk <= ce_vid;
	ce_pix  <= old_clk & ~ce_vid;
end

arcade_rotate_fx #(288,224,12,0) arcade_video
(
	.*,

	.clk_video(clk_hdmi),

	.RGB_in({r,g,b}),
	.HBlank(hblank),
	.VBlank(vblank),
	.HSync(~hs),
	.VSync(~vs),

	.fx(status[5:3]),
	.no_rotate(status[2])
);

wire			PCLK;
wire  [8:0] HPOS,VPOS;
wire [11:0] POUT;
HVGEN hvgen
(
	.HPOS(HPOS),.VPOS(VPOS),.PCLK(PCLK),.iRGB(POUT),
	.oRGB({b,g,r}),.HBLK(hblank),.VBLK(vblank),.HSYN(hs),.VSYN(vs)
);
assign ce_vid = PCLK;


wire [15:0] AOUT;
assign AUDIO_L = AOUT;
assign AUDIO_R = AUDIO_L;
assign AUDIO_S = 0; // unsigned PCM


///////////////////////////////////////////////////

wire	iRST = RESET | status[0] | buttons[1] | ioctl_download;

wire ORIENT = status[2];

function [3:0] STKROT;
input O;
input [3:0] STK;

	STKROT = O ? {STK[2],STK[1],STK[0],STK[3]} : STK;

endfunction

wire			CABI = ~bCabinet;
/*
wire  		FRZE = 1'b0;

wire  [1:0] COIA = 2'b00;				// 1coin/1credit
wire  [1:0] COIB = 2'b00;				// 1coin/1credit (COIN-B not works)

wire  [1:0] LIFE = status[11:10];
wire        SERV = status[17];		// Service-SW

wire  [7:0] DSW0 = {COIA,LIFE,4'h0};
wire  [7:0] DSW1 = {CABI,3'h0,COIB,1'b0,FRZE};
wire	[7:0] DSW2 = {4'h0,SERV,3'h0};
*/
wire  [7:0] DSW0 = 0;
wire  [7:0] DSW1 = 0;
wire	[7:0] DSW2 = 0;

wire  [5:0]	INP0 = { m_trig12, m_trig11, STKROT(ORIENT,{m_left1, m_down1, m_right1, m_up1})};
wire  [5:0]	INP1 = { m_trig22, m_trig22, STKROT(ORIENT,{m_left2, m_down2, m_right2, m_up2})};
wire	[2:0]	INP2 = { (m_coin1|m_coin2), m_start2, m_start1 };


wire  [7:0] oPIX;
wire  [7:0] oSND;

fpga_druaga GameCore ( 
	.RESET(iRST),.MCLK(clk_48M),
	.PH(HPOS),.PV(VPOS),.PCLK(PCLK),.POUT(oPIX),
	.SOUT(oSND),

	.INP0(INP0),.INP1(INP1),.INP2(INP2),
	.DSW0(DSW0),.DSW1(DSW1),.DSW2(DSW2),
	
	.ROMCL(clk_sys),.ROMAD(ioctl_addr),.ROMDT(ioctl_dout),.ROMEN(ioctl_wr)
);

assign POUT = {oPIX[7:6],2'b00,oPIX[5:3],1'b0,oPIX[2:0],1'b0};
assign AOUT = {oSND,8'h0};

endmodule


module HVGEN
(
	output  [8:0]		HPOS,
	output  [8:0]		VPOS,
	input 				PCLK,
	input	 [11:0]		iRGB,

	output reg [11:0]	oRGB,
	output reg			HBLK = 1,
	output reg			VBLK = 1,
	output reg			HSYN = 1,
	output reg			VSYN = 1
);

reg [8:0] hcnt = 0;
reg [8:0] vcnt = 0;

assign HPOS = hcnt;
assign VPOS = vcnt;

always @(posedge PCLK) begin
	case (hcnt)
		  1: begin HBLK <= 0; hcnt <= hcnt+1; end
		290: begin HBLK <= 1; hcnt <= hcnt+1; end
		311: begin HSYN <= 0; hcnt <= hcnt+1; end
		342: begin HSYN <= 1; hcnt <= 471;    end
		511: begin hcnt <= 0;
			case (vcnt)
				223: begin VBLK <= 1; vcnt <= vcnt+1; end
				226: begin VSYN <= 0; vcnt <= vcnt+1; end
				233: begin VSYN <= 1; vcnt <= 483;	  end
				511: begin VBLK <= 0; vcnt <= 0;		  end
				default: vcnt <= vcnt+1;
			endcase
		end
		default: hcnt <= hcnt+1;
	endcase
	oRGB <= (HBLK|VBLK) ? 12'h0 : iRGB;
end

endmodule