Arcade-Scramble.sv

//============================================================================
//  Arcade: Scramble
//
//  Port to MiSTer
//  Copyright (C) 2017 Sorgelig
//
//  This program is free software; you can redistribute it and/or modify it
//  under the terms of the GNU General Public License as published by the Free
//  Software Foundation; either version 2 of the License, or (at your option)
//  any later version.
//
//  This program is distributed in the hope that it will be useful, but WITHOUT
//  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
//  more details.
//
//  You should have received a copy of the GNU General Public License along
//  with this program; if not, write to the Free Software Foundation, Inc.,
//  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//============================================================================

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  [45:0] 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)
	output        VGA_F1,

	//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
	
	// Open-drain User port.
	// 0 - D+/RX
	// 1 - D-/TX
	// 2..6 - USR2..USR6
	// Set USER_OUT to 1 to read from USER_IN.
	input   [6:0] USER_IN,
	output  [6:0] USER_OUT
	
	
);

assign VGA_F1    = 0;
assign USER_OUT  = '1;
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.SCRMBL;;",
	"H0O1,Aspect Ratio,Original,Wide;",
	"H0O2,Orientation,Vert,Horz;",
	"O35,Scandoubler Fx,None,HQ2x,CRT 25%,CRT 50%,CRT 75%;",
	"-;",
	//"O89,Lives,3,5,4,255(Cheat);",
	//"OB,Bonus Life,30k/70k,50k/80k;",
	//"OC,Cabinet,Upright,Cocktail;",	
	//"OD,Demo Sounds,Off,On;",
	//"OE,Test,Off,On;",	
	"-;",
	"R0,Reset;",
	"J1,Fire,Bomb,Start 1P,Start 2P,Coin;",
	"jn,A,B,Start,Select,R;",
	"V,v",`BUILD_DATE
};
wire [5:1] m_dip = {status[13],status[11],status[12],~status[9:8]};

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

wire clk_sys,clk_49;
wire pll_locked;

pll pll
(
        .refclk(CLK_50M),
        .rst(0),
        .outclk_0(clk_49),
        .outclk_1(clk_sys),
        .locked(pll_locked)
);


reg ce_6p, ce_6n, ce_12, ce_1p79;
always @(negedge clk_sys) begin
	reg [1:0] div = 0;
	reg [3:0] div179 = 0;
	
	div <= div + 1'd1;

	ce_12 <= div[0];
	ce_6p <= div[0] & ~div[1];
	ce_6n <= div[0] &  div[1];
	
   ce_1p79 <= 0;
   div179 <= div179 - 1'd1;
   if(!div179) begin
		div179 <= 13;
		ce_1p79 <= 1;
   end
end

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

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

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

wire [10:0] ps2_key;

wire [15:0] joystick_0, joystick_1;
wire [15:0] joy = joystick_0 | joystick_1;

wire [21:0] gamma_bus;


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),
        .status_menumask(direct_video),
        .forced_scandoubler(forced_scandoubler),
        .gamma_bus(gamma_bus),
        .direct_video(direct_video),

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

	.joystick_0(joystick_0),
	.joystick_1(joystick_1),
	.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_fire2       <= pressed; // space
			'h014: btn_fire1       <= pressed; // ctrl

			'h005: btn_one_player  <= pressed; // F1
			'h006: btn_two_players <= pressed; // F2
			// JPAC/IPAC/MAME Style Codes

			'h005: btn_one_player  <= pressed; // F1
			'h006: btn_two_players <= pressed; // F2
			'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_fire1_2     <= pressed; // A
         'h01B: btn_fire2_2     <= pressed; // S			
			'h02C: btn_test        <= pressed; // T
		endcase
	end
end

reg btn_up    = 0;
reg btn_down  = 0;
reg btn_right = 0;
reg btn_left  = 0;
reg btn_fire1 = 0;
reg btn_fire2 = 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_fire1_2=0;
reg btn_fire2_2=0;
reg btn_test=0;

wire no_rotate = status[2] & ~direct_video;


wire m_up     = no_rotate ? btn_left  | joy[1] : btn_up    | joy[3];
wire m_down   = no_rotate ? btn_right | joy[0] : btn_down  | joy[2];
wire m_left   = no_rotate ? btn_down  | joy[2] : btn_left  | joy[1];
wire m_right  = no_rotate ? btn_up    | joy[3] : btn_right | joy[0];
wire m_fire1  = btn_fire1 | joy[4];
wire m_fire2  = btn_fire2 | joy[5];

wire m_up_2     = no_rotate ? btn_left_2  | joy[1] : btn_up_2    | joy[3];
wire m_down_2   = no_rotate ? btn_right_2 | joy[0] : btn_down_2  | joy[2];
wire m_left_2   = no_rotate ? btn_down_2  | joy[2] : btn_left_2  | joy[1];
wire m_right_2  = no_rotate ? btn_up_2    | joy[3] : btn_right_2 | joy[0];
wire m_fire1_2  = btn_fire1_2|joy[4];
wire m_fire2_2  = btn_fire2_2|joy[5];


wire m_start1 = btn_one_player  | joy[6];
wire m_start2 = btn_two_players | joy[7];
wire m_coin   = m_start1 | m_start2 | joy[8];


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

reg ce_pix;
always @(posedge clk_49) begin
        reg [2:0] div;

        div <= div + 1'd1;
        ce_pix <= !div;
end

arcade_rotate_fx #(264,224,12,0) arcade_video
(
        .*,

        .clk_video(clk_49),

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

        .rotate_ccw(0),

        .fx(status[5:3])
);

wire [9:0] audio;
assign AUDIO_L = {audio, 6'd0};
assign AUDIO_R = AUDIO_L;
assign AUDIO_S = 0;

scramble_top scramble
(
	.O_VIDEO_R(r),
	.O_VIDEO_G(g),
	.O_VIDEO_B(b),
	.O_HSYNC(hs),
	.O_VSYNC(vs),
	.O_HBLANK(hblank),
	.O_VBLANK(vblank),

	.dn_addr(ioctl_addr[15:0]),
	.dn_data(ioctl_dout),
	.dn_wr(ioctl_wr),

	.O_AUDIO(audio),

	//.button_in(~{m_fire2, m_start2, m_fire1, m_coin, m_start1, m_right, m_left, m_down, m_up}),
	.ip_1p(~{m_start1|btn_start_1,m_fire2,m_fire1,m_left,m_right,m_up,m_down}),
	.ip_2p(~{m_start2|btn_start_2,m_fire2_2,m_fire1_2,m_left_2,m_right_2,m_up_2,m_down_2}),
	.ip_service(~status[14]),
	.ip_coin1(m_coin|btn_coin_1|btn_coin_2),
	.ip_coin2(1'b0),

	.RESET(RESET | status[0] | ioctl_download | buttons[1]),
	.clk(clk_sys),
	.ena_12(ce_12),
	.ena_6(ce_6p),
	.ena_6b(ce_6n),
	.ena_1_79(ce_1p79)
);

endmodule