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Atari7800.sv
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Atari7800.sv
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`default_nettype none
// k7800 (c) by Jamie Blanks
// k7800 is licensed under a
// Creative Commons Attribution-NonCommercial 4.0 International License.
// You should have received a copy of the license along with this
// work. If not, see http://creativecommons.org/licenses/by-nc/4.0/.
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 [48:0] HPS_BUS,
//Base video clock. Usually equals to CLK_SYS.
output CLK_VIDEO,
//Multiple resolutions are supported using different CE_PIXEL rates.
//Must be based on CLK_VIDEO
output CE_PIXEL,
//Video aspect ratio for HDMI. Most retro systems have ratio 4:3.
//if VIDEO_ARX[12] or VIDEO_ARY[12] is set then [11:0] contains scaled size instead of aspect ratio.
output [12:0] VIDEO_ARX,
output [12:0] VIDEO_ARY,
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,
output [1:0] VGA_SL,
output VGA_SCALER, // Force VGA scaler
input [11:0] HDMI_WIDTH,
input [11:0] HDMI_HEIGHT,
output HDMI_FREEZE,
`ifdef MISTER_FB
// Use framebuffer in DDRAM (USE_FB=1 in qsf)
// FB_FORMAT:
// [2:0] : 011=8bpp(palette) 100=16bpp 101=24bpp 110=32bpp
// [3] : 0=16bits 565 1=16bits 1555
// [4] : 0=RGB 1=BGR (for 16/24/32 modes)
//
// FB_STRIDE either 0 (rounded to 256 bytes) or multiple of pixel size (in bytes)
output FB_EN,
output [4:0] FB_FORMAT,
output [11:0] FB_WIDTH,
output [11:0] FB_HEIGHT,
output [31:0] FB_BASE,
output [13:0] FB_STRIDE,
input FB_VBL,
input FB_LL,
output FB_FORCE_BLANK,
`ifdef MISTER_FB_PALETTE
// Palette control for 8bit modes.
// Ignored for other video modes.
output FB_PAL_CLK,
output [7:0] FB_PAL_ADDR,
output [23:0] FB_PAL_DOUT,
input [23:0] FB_PAL_DIN,
output FB_PAL_WR,
`endif
`endif
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,
// I/O board button press simulation (active high)
// b[1]: user button
// b[0]: osd button
output [1:0] BUTTONS,
input CLK_AUDIO, // 24.576 MHz
output [15:0] AUDIO_L,
output [15:0] AUDIO_R,
output AUDIO_S, // 1 - signed audio samples, 0 - unsigned
output [1:0] AUDIO_MIX, // 0 - no mix, 1 - 25%, 2 - 50%, 3 - 100% (mono)
//ADC
inout [3:0] ADC_BUS,
//SD-SPI
output SD_SCK,
output SD_MOSI,
input SD_MISO,
output SD_CS,
input SD_CD,
//High latency DDR3 RAM interface
//Use for non-critical time purposes
output DDRAM_CLK,
input DDRAM_BUSY,
output [7:0] DDRAM_BURSTCNT,
output [28:0] DDRAM_ADDR,
input [63:0] DDRAM_DOUT,
input DDRAM_DOUT_READY,
output DDRAM_RD,
output [63:0] DDRAM_DIN,
output [7:0] DDRAM_BE,
output DDRAM_WE,
//SDRAM interface with lower latency
output SDRAM_CLK,
output SDRAM_CKE,
output [12:0] SDRAM_A,
output [1:0] SDRAM_BA,
inout [15:0] SDRAM_DQ,
output SDRAM_DQML,
output SDRAM_DQMH,
output SDRAM_nCS,
output SDRAM_nCAS,
output SDRAM_nRAS,
output SDRAM_nWE,
`ifdef MISTER_DUAL_SDRAM
//Secondary SDRAM
//Set all output SDRAM_* signals to Z ASAP if SDRAM2_EN is 0
input SDRAM2_EN,
output SDRAM2_CLK,
output [12:0] SDRAM2_A,
output [1:0] SDRAM2_BA,
inout [15:0] SDRAM2_DQ,
output SDRAM2_nCS,
output SDRAM2_nCAS,
output SDRAM2_nRAS,
output SDRAM2_nWE,
`endif
input UART_CTS,
output UART_RTS,
input UART_RXD,
output UART_TXD,
output UART_DTR,
input UART_DSR,
// 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,
input OSD_STATUS
);
assign BUTTONS = 0;
assign {UART_RTS, UART_TXD, UART_DTR} = 0;
assign AUDIO_S = 0;
assign AUDIO_MIX = status[3:2];
assign LED_USER = cart_download | bk_state | bk_pending;
assign LED_DISK = 0;
assign LED_POWER = 0;
assign VGA_SCALER = 0;
assign {UART_RTS, UART_TXD, UART_DTR} = 0;
assign {DDRAM_CLK, DDRAM_BURSTCNT, DDRAM_ADDR, DDRAM_DIN, DDRAM_BE, DDRAM_RD, DDRAM_WE} = 0;
assign {SD_SCK, SD_MOSI, SD_CS} = 'Z;
/////////////////////// CLOCK/RESET ///////////////////////////////////
wire clock_locked;
wire clk_vid;
wire clk_sys;
wire clk_tia;
pll pll
(
.refclk(CLK_50M),
.rst(0),
.outclk_0(clk_sys),
.outclk_1(clk_vid),
.outclk_2(clk_tia),
.locked(clock_locked)
);
// 7.1590909 = NTSC pixel clock
// 14.318189 = NTSC Master clock
// 7.093788 = PAL Pixel Clock // Skip every 109 cycles?
// 14.187576 = PAL Master Clock
logic reset;
logic use_tape;
always @(posedge clk_vid) begin
if (status[48])
use_tape <= 1;
if (cart_download)
use_tape <= 0;
reset <= RESET | buttons[1] | status[0] | cart_download | bios_download || status[48];
end
wire cart_download = ioctl_download & (ioctl_index[5:0] == 6'd1);
wire bios_download = ioctl_download & ((ioctl_index[5:0] == 6'd0) && (ioctl_index[7:6] == 0)) || (ioctl_index[5:0] == 2);
wire pal_download = ioctl_download & (ioctl_index[5:0] == 6'd3);
reg old_cart_download;
//////////////////////////// HPS I/O //////////////////////////////////
// Status Bit Map:
// 0 1 2 3 4 5 6
// 01234567890123456789012345678901 23456789012345678901234567890123
// 0123456789ABCDEFGHIJKLMNOPQRSTUV 0123456789ABCDEFGHIJKLMNOPQRSTUV
// XXXXXXXX XXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX XXXXXXXX
`include "build_id.v"
parameter CONF_STR = {
"ATARI7800;;",
"FS1,A78A26BIN;",
"FC2,ROMBIN,Load BIOS;",
"-;",
"OFG,Region,Auto,NTSC,PAL;",
"OC,Difficulty Right,A,B;",
"OD,Difficulty Left,A,B;",
"-;",
"P1,Audio & Video;",
"P1-;",
"P1O23,Stereo Mix,None,25%,50%,100%;",
"P1O4,Stereo TIA,No,Yes;",
"d0P1OM,Vertical Crop,Disabled,216p(5x);",
"d0P1ONQ,Crop Offset,0,2,4,8,10,12,-12,-10,-8,-6,-4,-2;",
"P1ORS,Scale,Normal,V-Integer,Narrower HV-Integer,Wider HV-Integer;",
"P1-;",
"P1oIJ,Aspect ratio,Original,Full Screen,[ARC1],[ARC2];",
"P1O9B,Scandoubler Fx,None,HQ2x,CRT 25%,CRT 50%,CRT 75%;",
"P1OT,Show Overscan,No,Yes;",
"P1OE,Show Border,Yes,No;",
"P1OK,Composite Blending,No,Yes;",
"P1OUV,Temperature Colors,Warm,Cool,Hot,Custom;",
"H3P1FC3,PAL,Load Palette;",
"P2,Peripherals;",
"P2OIJ,High Score Cart,Auto,On,Off;",
"P2O7,Swap Joysticks,No,Yes;",
"P2-;",
"P2o69,Port1 Input,Auto,None,Joystick,Lightgun,Paddle,Trakball,Keypad,Driving,STMouse,AmigaMouse,BoosterGrip,Robotron,SaveKey,SNAC;",
"P2oAD,Port2 Input,Auto,None,Joystick,Lightgun,Paddle,Trakball,Keypad,Driving,STMouse,AmigaMouse,BoosterGrip,Robotron,SaveKey,SNAC;",
"h1P2O5,SNAC Analog,Yes,No;",
"h1P2O6,Sega Phaser Mode,No,Yes;",
"P2oH,Swap Paddle A<->B,No,Yes;",
"P2oE,Quadtari,Off,On;",
"P2-;",
"P2o01,Gun Control,Joy1,Joy2,Mouse;",
"P2o2,Gun Fire,Joy,Mouse;",
"P2o45,Cross,Small,Medium,Big,None;",
"D2P4,Atari2600;",
"D2P4oT,Flickerblend,Off,On;",
"D2P4oV,Stabilize Video,On,Off;",
"D2P4oF,De-comb,Off,On;",
"D2P4oU,Black & White,Off,On;",
"D2P4oOS,Bankswitching,Auto,F8,F6,FE,E0,3F,F4,P2,FA,CV,2K,UA,E7,F0,32,AR,3E,SB,WD,EF;",
"D2P4-;",
"D2P4rG,Load Tape From ADC;",
"P3,Advanced;",
"P3OH,Bypass Bios,Yes,No;",
"P3O1,Clear Memory,Zero,Random;",
"P3O7,Pokey IRQ Enabled,No,Yes;",
"D2P3OL,CPU Driver,TIA,Maria;",
"-;",
"o3,Pause Core on OSD,Off,On;",
"-;",
"R0,Hard Reset;",
"J,Fire1,Fire2,Pause/B&W,Select,Reset(Start),Paddle Button,Diff L,Diff R,Halt;",
"jn,A,B,R,Select,Start,X|P;",
"jp,B,Y,R,Select,Start,X|P;",
"I,",
"Paddle 1A Assigned,",
"Paddle 1B Assigned,",
"Paddle 2A Assigned,",
"Paddle 2B Assigned,",
"Difficulty Right: A,",
"Difficulty Right: B,",
"Difficulty Left: A,",
"Difficulty Left: B,",
"Black and White: Off,",
"Black and White: On,",
"Paddle Mode Enabled,",
"Joystick Mode Enabled;",
"V,v",`BUILD_DATE
};
wire [1:0] buttons;
logic [63:0] status, status_in;
wire status_set;
wire forced_scandoubler;
wire img_mounted;
wire img_readonly;
wire [63:0] img_size;
wire ioctl_download;
wire [24:0] ioctl_addr;
wire [7:0] ioctl_dout;
wire ioctl_wr;
wire [7:0] ioctl_index;
wire [21:0] gamma_bus;
wire [15:0] joy0,joy1,joy2,joy3;
wire [15:0] joya_0,joya_1,joya_2,joya_3,joyar_0,joyar_1,joyar_2,joyar_3;
wire [7:0] pd_0,pd_1,pd_2,pd_3;
wire ioctl_wait;
reg [31:0] sd_lba[1];
reg sd_rd;
reg sd_wr;
wire sd_ack;
wire [8:0] sd_buff_addr;
wire [7:0] sd_buff_dout;
wire [7:0] sd_buff_din[1];
wire sd_buff_wr;
reg en216p;
wire [24:0] ps2_mouse;
logic [10:0] ps2_key;
logic [15:0] ps2_mouse_ext;
logic is_snac0, is_snac1;
logic info_req;
logic [7:0] info;
logic [1:0] last_paddle;
logic pad0_assigned, pad1_assigned, pad2_assigned, pad3_assigned;
logic old_auto_paddle, auto_paddle;
hps_io #(.CONF_STR(CONF_STR)) hps_io
(
.clk_sys (clk_sys),
.HPS_BUS (HPS_BUS),
.buttons (buttons),
.forced_scandoubler (forced_scandoubler),
.gamma_bus (gamma_bus),
.joystick_0 (joy0),
.joystick_1 (joy1),
.joystick_2 (joy2),
.joystick_3 (joy3),
.joystick_l_analog_0 (joya_0),
.joystick_l_analog_1 (joya_1),
.joystick_l_analog_2 (joya_2),
.joystick_l_analog_3 (joya_3),
.joystick_r_analog_0 (joyar_0),
.joystick_r_analog_1 (joyar_1),
.joystick_r_analog_2 (joyar_2),
.joystick_r_analog_3 (joyar_3),
.paddle_0 (pd_0),
.paddle_1 (pd_1),
.paddle_2 (pd_2),
.paddle_3 (pd_3),
.info_req (info_req),
.info (info),
.ps2_mouse (ps2_mouse),
.ps2_mouse_ext (ps2_mouse_ext),
.ps2_key (ps2_key),
.status (status),
.status_set (status_set),
.status_in (status_in),
.status_menumask ({status[31:30] != 3,~tia_en,(is_snac0 | is_snac1),en216p}),
.ioctl_addr (ioctl_addr),
.ioctl_dout (ioctl_dout),
.ioctl_wr (ioctl_wr),
.ioctl_download (ioctl_download),
.ioctl_index (ioctl_index),
.ioctl_wait (ioctl_wait),
.sd_lba (sd_lba),
.sd_rd (sd_rd),
.sd_wr (sd_wr),
.sd_ack (sd_ack),
.sd_buff_addr (sd_buff_addr),
.sd_buff_dout (sd_buff_dout),
.sd_buff_din (sd_buff_din),
.sd_buff_wr (sd_buff_wr),
.img_mounted (img_mounted),
.img_readonly (img_readonly),
.img_size (img_size)
);
//////////////////////////// SYSTEM ///////////////////////////////////
logic tia_en;
logic [3:0] idump;
logic [1:0] ilatch;
logic [7:0] PAin, PBin, PAout, PBout;
wire [7:0] R,G,B;
wire HSync;
wire VSync;
wire HBlank;
wire VBlank;
wire [15:0] bios_addr;
reg [7:0] cart_data, bios_data;
reg [7:0] joy0_type, joy1_type, cart_region, cart_save;
logic [15:0] cart_flags;
logic [39:0] cart_header;
logic [31:0] cart_size;
logic [24:0] cart_addr;
logic [7:0] cart_xm;
logic cart_busy;
logic cart_read;
logic [7:0] cart_data_sd;
reg cart_loaded = 0;
logic RW;
logic cart_is_7800;
logic [7:0] hsc_ram_dout, din;
logic hsc_ram_cs;
logic tia_mode;
logic ce_pix_raw;
logic [7:0] cart_din;
logic cart_rw;
wire [4:0] force_bs;
wire sc;
logic [15:0] rnd;
wire PAread;
lfsr #(.N(15)) random(rnd);
wire region_select = ~|status[16:15] ? (tia_en ? tia_pal : cart_region[0]) : status[16];
logic [3:0] iout;
logic tia_hsync;
logic tia_pal, tia_f1;
logic [7:0] rval;
always @(posedge clk_sys) begin
rval <= rnd[7:0];
old_cart_download <= cart_download;
end
logic tape_adc;
logic tape_adc_act;
ltc2308_tape #(.CLK_RATE(14318182)) ltc2308_tape
(
.clk(clk_sys),
.reset(reset),
.ADC_BUS(ADC_BUS),
.dout(tape_adc),
.active(tape_adc_act)
);
wire [17:0] cartram_addr;
wire cartram_wr;
wire [7:0] cartram_wrdata;
wire cartram_rd;
wire [7:0] cartram_data;
wire cartram_busy;
logic [3:0] i_read;
logic halted;
logic use_sk;
logic core_paused;
logic freeze_sync;
logic cpu_ce;
always_ff @(posedge clk_sys) begin :core_sync
reg old_sync;
old_sync <= freeze_sync;
if (old_sync ^ freeze_sync)
core_paused <= (status[35] && OSD_STATUS) || halted;
end
assign HDMI_FREEZE = core_paused;
Atari7800 main
(
.clk_sys (clk_sys),
.reset (reset),
.loading (cart_download || bios_download),
.pause (core_paused),
// Video
.RED (R),
.GREEN (G),
.BLUE (B),
.HSync (HSync),
.VSync (VSync),
.HBlank (HBlank),
.VBlank (VBlank),
.ce_pix (ce_pix_raw),
.show_border (~status[14]),
.show_overscan(status[29]),
.PAL (region_select),
.pal_temp (status[31:30]),
.tia_mode (tia_mode && ~status[17]),
.bypass_bios (~status[17]),
.pokey_irq (status[7]),
.hsc_en (~use_sk && (~|status[19:18] && (|cart_save || cart_xm[0]) ? 1'b1 : status[18])),
.hsc_ram_dout (hsc_ram_dout),
.hsc_ram_cs (hsc_ram_cs),
// Audio
.AUDIO_R (AUDIO_R), // 16 bit
.AUDIO_L (AUDIO_L), // 16 bit
// Cart Interface
.cart_out (cart_download ? ioctl_dout[7:0] : (cart_loaded ? cart_data_sd : cart_data)),
.cart_read (cart_read),
.cart_size (cart_size),
.cart_addr_out(cart_addr),
.cart_flags (cart_is_7800 ? cart_flags[15:0] : 16'd0),
.cart_save (cart_save),
.cart_din (cart_din),
.cart_xm (cart_is_7800 ? cart_xm : 8'h0),
.ps2_key (ps2_key),
.cartram_addr (cartram_addr),
.cartram_wr (cartram_wr),
.cartram_rd (cartram_rd),
.cartram_wrdata (cartram_wrdata),
.cartram_data (cartram_data),
// BIOS
.bios_out (bios_data),
.AB (bios_addr), // Address
.RW (RW), // inverted write
.dout (din),
// Tia
.idump (idump), // Paddle {A0, B0, A1, B1}
.ilatch (ilatch), // Buttons {FireB, FireA}
.i_out (iout),
.tia_en (tia_en),
.tia_hsync (tia_hsync),
.use_stereo (status[4]),
.cpu_driver (~status[21]),
.tia_f1 (tia_f1),
.tia_pal (tia_pal),
.tia_stab (status[63]),
// RIOT
.PAin (PAin), // Direction {RA, LA, DA, UA, RB, LB, DB, UB}
.PBin (PBin), // Port B input
.PAout (PAout), // Port A output
.PBout (PBout), // Peanut butter
.PAread (PAread),
// 2600 Cart Flags from detect2600
.force_bs (use_tape ? BANKAR : force_bs),
.sc (sc),
.clearval (status[1] ? rval : 8'h00),
.random (rval),
.decomb (status[47]),
.mapper (status[60:56]),
.tape_in ({use_tape, tape_adc}),
// Palette loading
.pal_load (pal_download),
.pal_addr (ioctl_addr[9:0]),
.pal_wr (ioctl_wr),
.pal_data (ioctl_dout[7:0]),
.blend (status[61]),
.i_read (i_read)
);
//////////////////////////// MEMORY ///////////////////////////////////
logic [14:0] bios_mask;
detect2600 detect2600
(
.clk (clk_sys),
.addr (ioctl_addr[15:0]),
.reset (~old_cart_download && cart_download),
.cart_size (cart_size),
.enable (ioctl_wr & cart_download),
.data (ioctl_dout),
.force_bs (force_bs),
.sc (sc)
);
initial begin
cart_header = "ATARI";
cart_size = 32'h00008000;
cart_flags = 0;
cart_region = 0;
bios_mask = 0;
cart_save = 0;
cart_xm = 0;
tia_mode = 0;
end
always_ff @(posedge clk_sys) begin
cart_is_7800 <= (cart_header == "ATARI");
if (bios_download && ioctl_wr) // This assumes bootrom is always power of two
bios_mask <= ioctl_addr[14:0];
if (cart_download && ioctl_wr)
cart_size <= (ioctl_addr - (cart_is_7800 ? 8'd128 : 1'b0)) + 1'd1; // 32 bit 1
if (cart_download) begin
tia_mode <= ioctl_index[7:6] != 0;
cart_loaded <= 1;
if (!tia_mode) begin
case (ioctl_addr)
'd01: cart_header[39:32] <= ioctl_dout;
'd02: cart_header[31:24] <= ioctl_dout;
'd03: cart_header[23:16] <= ioctl_dout;
'd04: cart_header[15:8] <= ioctl_dout;
'd05: cart_header[7:0] <= ioctl_dout;
// 'd49: hcart_size[31:24] <= ioctl_dout;
// 'd50: hcart_size[23:16] <= ioctl_dout;
// 'd51: hcart_size[15:8] <= ioctl_dout;
// 'd52: hcart_size[7:0] <= ioctl_dout;
'd53: cart_flags[15:8] <= ioctl_dout;
'd54: cart_flags[7:0] <= ioctl_dout;
'd55: joy0_type <= ioctl_dout; // 0=none, 1=joystick, 2=lightgun
'd56: joy1_type <= ioctl_dout;
'd57: cart_region <= ioctl_dout; // 0=ntsc, 1=pal
'd58: cart_save <= ioctl_dout; // 0=none, 1=high score cart, 2=savekey
'd63: cart_xm <= ioctl_dout; // 1 = Has XM
endcase
if (!cart_is_7800) begin
joy0_type <= 8'd1;
joy1_type <= 8'd1;
end
end else begin
joy0_type <= 8'd1;
joy1_type <= 8'd1;
cart_header <= '0;
cart_flags <= 0;
cart_region <= 0;
cart_save <= 0;
cart_xm <= 0;
end
end
end
logic [24:0] cart_write_addr, fixed_addr;
assign cart_write_addr = (ioctl_addr >= 8'd128) && cart_is_7800 ? (ioctl_addr[24:0] - 8'd128) : ioctl_addr[24:0];
spram #(
.addr_width(14),
.mem_name("Cart"),
.mem_init_file("mem0.mif")
) cart
(
.address (cart_addr),
.clock (clk_sys),
.data (),
.wren (),
.q (cart_data)
);
spram #(.addr_width(15), .mem_name("BIOS")) bios
(
.address (bios_download ? ioctl_addr : (bios_addr[14:0] & bios_mask)),
.clock (clk_sys),
.data (ioctl_dout),
.wren (ioctl_wr & bios_download),
.q (bios_data)
);
always @(posedge clk_vid)
ioctl_wait <= cart_download && cart_busy;
sdram sdram
(
.*,
// system interface
.clk ( clk_vid ),
.init ( !clock_locked ),
// cpu/chipset interface
.ch0_addr (cart_download ? cart_write_addr : cart_addr),
.ch0_wr (cart_download ? (ioctl_wr & cart_download) : 1'b0),
.ch0_din (cart_download ? ioctl_dout : cart_din),
.ch0_rd (cart_read & ~cart_download & ~reset),
.ch0_dout (cart_data_sd),
.ch0_busy (cart_busy),
.ch1_addr (/*cartram_addr*/),
.ch1_wr (/*cartram_wr*/),
.ch1_din (/*cartram_wrdata*/),
.ch1_rd (/*cartram_rd*/),
.ch1_dout (/*cartram_data*/),
.ch1_busy (/*cartram_busy*/),
// reserved for backup ram save/load
.ch2_addr ( ),
.ch2_wr ( ),
.ch2_din ( ),
.ch2_rd ( ),
.ch2_dout ( ),
.ch2_busy ( )
);
////////////////////////////// IO /////////////////////////////////////
// RIOT Ports:
// 4 bits of PA are used for first stick, other 4 bits for second stick.
// 2600: Bits PB 0,1,3,6,7 are used for reset, select, b/w, left diff, right diff
// 7800: Bits PB 0,1,3,6,7 are used for reset, select, pause, left diff, right diff
// 7800: Bits PB 2 & 4 are used for output to select 2 button mode.
assign info_req = pad0_assigned | pad1_assigned | pad2_assigned |
pad3_assigned | toggle_bw | toggle_ldiff | toggle_rdiff | toggle_paddle;
always_comb begin
info = 8'd0;
if (pad0_assigned)
info = 8'd1;
if (pad1_assigned)
info = 8'd2;
if (pad2_assigned)
info = 8'd3;
if (pad3_assigned)
info = 8'd4;
if (toggle_rdiff)
info = status[12] ? 8'd5: 8'd6;
if (toggle_ldiff)
info = status[13] ? 8'd7: 8'd8;
if (toggle_bw)
info = status[62] ? 8'd9: 8'd10;
if (toggle_paddle)
info = (auto_paddle ? 8'd11 : 8'd12);
end
assign PBin[7] = ~status[12]; // Right diff
assign PBin[6] = ~status[13]; // Left diff
assign PBin[5] = PBout[5]; // Unused (Not connected)
assign PBin[4] = PBout[4]; // Unused (used for 2 button sensing)
assign PBin[3] = tia_en ? ~status[62] : (~joya[6] & ~joyb[6]); // Pause/B&W
assign PBin[2] = PBout[2]; // Unused (used for 2 button sensing)
assign PBin[1] = (~joya[7] & ~joyb[7] & ~keyselect); // Select
assign PBin[0] = (~joya[8] & ~joyb[8] & ~keystart); // Start/Reset
wire [7:0] porta_type, portb_type;
wire [1:0] gun_mode = status[33:32];
wire gun_btn_mode = status[34];
wire gun_port = (portb_type == 2) ? 1'b1 : 1'b0;
wire gun_en = (porta_type == 2 || portb_type == 2);
wire gun_target;
wire gun_sensor;
wire gun_trigger;
lightgun lightgun
(
.CLK(clk_sys),
.RESET(reset),
.MOUSE(ps2_mouse),
.MOUSE_XY(gun_mode[1]),
.LIGHT (|R[7:4] || |G[7:4] || |B[7:4]),
.H_WIDTH(tia_en ? 9'd160 : 9'd372),
.JOY_X(~|gun_mode ? joya_0[7:0] : joya_1[7:0]),
.JOY_Y(~|gun_mode ? joya_0[15:8] : joya_1[15:8]),
.JOY_TRIG(~|gun_mode ? (joya[4] || joya[5]) :(joyb[4] || joyb[5])),
.HDE(~HBlank),
.VDE(~VBlank),
.CE_PIX(ce_pix_raw),
.BTN_MODE(gun_btn_mode),
.SIZE(status[37:36]),
.SENSOR_DELAY(tia_en ? 21 : 46),
.LINE_DELAY(tia_en ? 8 : 8),
.TARGET(gun_target),
.SENSOR(gun_sensor),
.TRIGGER(gun_trigger)
);
logic [3:0] pad_b;
logic [7:0] pad_ax[4];
logic [3:0] pad_wire;
logic [15:0] joya_a, joya_b, joya_c, joya_d;
logic [7:0] pd_a, pd_b, pd_c, pd_d;
logic sb_a, sb_b, sb_c, sb_d;
logic pdb_a, pdb_b, pdb_c, pdb_d;
wire [3:0] paddle_mask = {(portb_type == 2'd3 ? 2'b11 : 2'b00), (porta_type == 2'd3 ? 2'b11 : 2'b00)};
paddle_chooser paddles
(
.clk (clk_sys),
.reset (reset),
.mask (paddle_mask),
.enable0 (1'b1),
.enable1 (1'b1),
.mouse (ps2_mouse),
.analog ({joya_3, joya_2, joya_1, joya_0}),
.paddle ({pd_3, pd_2, pd_1, pd_0}),
.buttons_in ({joy3[9], joy2[9], joy1[9], joy0[9]}),
.assigned ({pad3_assigned, pad2_assigned, pad1_assigned, pad0_assigned}),
.pd_out ({pad_ax[3], pad_ax[2], pad_ax[1], pad_ax[0]}),
.paddle_but (pad_b)
);
logic [31:0] difference0, difference1, difference2, difference3;
wire [3:0] pread_mux1 = status[49] ? {i_read[2], i_read[3], i_read[0], i_read[1]} : i_read;
wire [3:0] pread_mux2 = status[7] ? {pread_mux1[1:0], pread_mux1[3:2]} : pread_mux1;
paddle_timer pt0 (clk_sys, 1, reset || ~paddle_mask[0], {1'b0, pad_ax[0][7:0]}, ~iout[1], pread_mux2[0], pad_wire[0], difference0);
paddle_timer pt1 (clk_sys, 1, reset || ~paddle_mask[1], {1'b0, pad_ax[1][7:0]}, ~iout[1], pread_mux2[1], pad_wire[1], difference1);
paddle_timer pt2 (clk_sys, 1, reset || ~paddle_mask[2], {1'b0, pad_ax[2][7:0]}, ~iout[1], pread_mux2[2], pad_wire[2], difference2);
paddle_timer pt3 (clk_sys, 1, reset || ~paddle_mask[3], {1'b0, pad_ax[3][7:0]}, ~iout[1], pread_mux2[3], pad_wire[3], difference3);
logic [7:0] mouse_x, mouse_y;
logic dir_x, dir_y;
logic ep_do;
logic [3:0] trackball;
logic trackball_button;
wire pada_0, pada_1, padb_0, padb_1;
wire is_rdiff = joya[11] | joyb[11] | keyrdiff;
wire is_ldiff = joya[10] | joyb[10] | keyldiff;
wire is_halt = joya[12] | joyb[12] | keyhalt;
wire is_bw = (joya[6] | joyb[6] | keybw) && tia_en;
logic old_rdiff, old_ldiff, old_bw, old_halt;
wire toggle_rdiff = ~old_rdiff && is_rdiff;
wire toggle_ldiff = ~old_ldiff && is_ldiff;
wire toggle_bw = ~old_bw && is_bw;
wire toggle_paddle = old_auto_paddle != auto_paddle;
wire toggle_halt = old_halt && ~is_halt;
assign status_set = toggle_rdiff || toggle_ldiff || toggle_bw;
always_comb begin
status_in = status;
status_in[62] = tia_en && toggle_bw ? ~status[62] : status[62];
status_in[12] = toggle_rdiff ? ~status[12] : status[12];
status_in[13] = toggle_ldiff ? ~status[13] : status[13];
end
always @(posedge clk_sys) begin
logic ps2_old;
logic xtog, ytog;
old_rdiff <= is_rdiff;
old_ldiff <= is_ldiff;
old_bw <= is_bw;
old_halt <= is_halt;
old_auto_paddle <= auto_paddle;
if (toggle_halt)
halted <= ~halted;
if (joya[4])
auto_paddle <= 0;
if (joya[9] && ~|status[41:38] && tia_en)
auto_paddle <= 1;
if (~tia_en || reset)
auto_paddle <= 0;
ps2_old <= ps2_mouse[24];
// Feed out the trackball movement one pixel per cpu cycle.
if (PAread) begin
if (mouse_y > 0) begin
ytog <= ~ytog;
mouse_y <= mouse_y - 1'd1;
end
if (mouse_x > 0) begin
xtog <= ~xtog;
mouse_x <= mouse_x - 1'd1;
end
trackball <= {ytog, dir_y, xtog, dir_x};
end
if (ps2_old != ps2_mouse[24]) begin
trackball_button <= ps2_mouse[0] | ps2_mouse[1]; // Allow either right or left button to trigger
mouse_x <= ps2_mouse[4] ? ~ps2_mouse[15:8] : ps2_mouse[15:8]; // Record the absolute values of the 2's complement numbers
mouse_y <= ps2_mouse[5] ? ~ps2_mouse[23:16] : ps2_mouse[23:16];
dir_x <= ~ps2_mouse[4]; // Record the directions (x is inverted for this trackball)
dir_y <= ps2_mouse[5];
end
end
logic [6:0] st_mouse;
logic [3:0] st_m_cnt;
always @(posedge clk_sys)
st_m_cnt <= st_m_cnt + 1'd1;
ps2 mouse_st (
.clk (clk_sys),
.ce (!st_m_cnt),
.reset (reset),
.ps2_key (ps2_key),
.ps2_mouse (ps2_mouse),
.ps2_mouse_ext (ps2_mouse_ext),
.mouse_atari (st_mouse)
);
wire joya_b2 = ~PBout[2] && ~tia_en && joy0_type != 5;
wire joyb_b2 = ~PBout[4] && ~tia_en && joy1_type != 5;
logic [15:0] joya, joyb;
assign joya = (status[46] && ~iout[0]) ? joy2 : (status[7] ? joy1 : joy0);
assign joyb = (status[46] && ~iout[0]) ? joy3 : (status[7] ? joy0 : joy1);
// Col0 Col1 Col2
logic key3, key2, key1; // Row 0
logic key6, key5, key4; // Row 1
logic key9, key8, key7; // Row 2
logic keyh, key0, keya; // Row 3
logic keystart, keyselect, keyhalt, keyrdiff, keyldiff, keybw;
// Follows the format of il, id[1:0], pa[3:0]
logic [6:0] keypad0, keypad1;
wire [3:0] kp_out0 = PAout[7:4];
wire [3:0] kp_out1 = PAout[3:0];
logic [3:0] robor, robol;
// 1,2,3 ---> 1,2,3
// 4,5,6 ---> Q,W,E
// 7,8,9 ---> A,S,D
// *,0,# ---> Z,X,C
// Matrix-ify the keypad
always @(posedge clk_sys) begin
logic last_ps2key10;
if(last_ps2key10 != ps2_key[10]) begin
last_ps2key10 <= ps2_key[10];
case (ps2_key[8:0])
9'h16: key1 <= ps2_key[9]; // 1
9'h1E: key2 <= ps2_key[9]; // 2
9'h26: key3 <= ps2_key[9]; // 3
// Number row
9'h25: key4 <= ps2_key[9]; // 4
9'h2E: key5 <= ps2_key[9]; // 5
9'h36: key6 <= ps2_key[9]; // 6
9'h3D: key7 <= ps2_key[9]; // 7
9'h3E: key8 <= ps2_key[9]; // 8
9'h46: key9 <= ps2_key[9]; // 9
9'h45: key0 <= ps2_key[9]; // 0
9'h4E: keyh <= ps2_key[9]; // -
9'h55: keya <= ps2_key[9]; // =
// Numpad Layout
9'h15: key4 <= ps2_key[9]; // Q
9'h1d: key5 <= ps2_key[9]; // W
9'h24: key6 <= ps2_key[9]; // E
9'h1c: key7 <= ps2_key[9]; // A
9'h1b: key8 <= ps2_key[9]; // S
9'h23: key9 <= ps2_key[9]; // D
9'h1a: keya <= ps2_key[9]; // Z
9'h22: key0 <= ps2_key[9]; // X
9'h21: keyh <= ps2_key[9]; // C
// Numeric Keypad Layout
9'h77: key1 <= ps2_key[9]; // Numlock
9'h4A: key2 <= ps2_key[9]; // Divide
9'h7C: key3 <= ps2_key[9]; // Times
9'h6C: key4 <= ps2_key[9]; // Num 7
9'h75: key5 <= ps2_key[9]; // Num 8
9'h7D: key6 <= ps2_key[9]; // Num 9
9'h6B: key7 <= ps2_key[9]; // Num 4
9'h73: key8 <= ps2_key[9]; // Num 5
9'h74: key9 <= ps2_key[9]; // Num 6
9'h69: keya <= ps2_key[9]; // Num 1
9'h72: key0 <= ps2_key[9]; // Num 2
9'h7A: keyh <= ps2_key[9]; // Num 3
9'h05: keyselect <= ps2_key[9]; // F1
9'h06: keystart <= ps2_key[9]; // F2
9'h04: keybw <= ps2_key[9]; // F3
9'h0C: keyldiff <= ps2_key[9]; // F4
9'h03: keyrdiff <= ps2_key[9]; // F5
9'h0B: keyhalt <= ps2_key[9]; // F6
endcase
end
if (reset)
{key1, key2, key3, key4, key5, key6, key7, key8, key9, key0, keyh, keya, keystart, keyselect, keybw, keyldiff, keyrdiff, keyhalt} <= '0;
// These have pull-ups in an undisturbed state
keypad0 <= '1;
keypad1 <= '1;
// Row 0
if (key3) begin keypad0[6] <= kp_out0[0]; keypad1[6] <= kp_out1[0]; end
if (key2) begin keypad0[5] <= kp_out0[0]; keypad1[5] <= kp_out1[0]; end
if (key1) begin keypad0[4] <= kp_out0[0]; keypad1[4] <= kp_out1[0]; end