//============================================================================ // // 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 [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 output VGA_DISABLE, // analog out is off input [11:0] HDMI_WIDTH, input [11:0] HDMI_HEIGHT, output HDMI_FREEZE, output HDMI_BLACKOUT, output HDMI_BOB_DEINT, `ifdef MISTER_FB // Use framebuffer in DDRAM // 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 ); ///////// Default values for ports not used in this core ///////// assign ADC_BUS = 'Z; assign USER_OUT = '1; assign {UART_RTS, UART_TXD, UART_DTR} = 0; assign {SD_SCK, SD_MOSI, SD_CS} = 'Z; assign {SDRAM_DQ, SDRAM_A, SDRAM_BA, SDRAM_CLK, SDRAM_CKE, SDRAM_DQML, SDRAM_DQMH, SDRAM_nWE, SDRAM_nCAS, SDRAM_nRAS, SDRAM_nCS} = 'Z; assign {DDRAM_CLK, DDRAM_BURSTCNT, DDRAM_ADDR, DDRAM_DIN, DDRAM_BE, DDRAM_RD, DDRAM_WE} = '0; assign VGA_F1 = 0; assign VGA_SCALER = 0; assign VGA_DISABLE = 0; assign HDMI_FREEZE = 0; assign HDMI_BLACKOUT = 0; assign HDMI_BOB_DEINT = 0; assign AUDIO_S = 1; assign AUDIO_L = AUDIO_R; assign AUDIO_MIX = 0; assign LED_DISK = (cart_download | bootrom_download | text_download) & ~ioctl_wait; assign LED_POWER = 0; assign LED_USER = kb_matrix ? ~pia_ca2 : ~pa_out[6]; assign BUTTONS = 0; ////////////////////////////////////////////////////////////////// `include "build_id.v" localparam CONF_STR = { "CreatiVision;;", "-;", "F1,rombin,Load Cartridge;", "FC2,rombin,Load Bios;", "F3,bas,Load BASIC;", "-;", "O[14:13],System Type,CreatiVision,Laser 2001,Custom;", "h1O[16:15],ZeroPage RAM,1k,4k,Mirrored 4k;", "h1O[18:17],Extra RAM,None,$4000,Both;", "h1O[19],Input Matrix,CreatiVision,Laser 2001;", "O[7],Video Region,NTSC,PAL;", "-;", "P1,Audio & Video;", "P1-;", "P1O[1],Border,Off,On;", "d0P1O[6],Vertical Crop,Disabled,216p(5x);", "d0P1O[12:9],Crop Offset,0,2,4,8,10,12,-12,-10,-8,-6,-4,-2;", "P1O[122:121],Aspect ratio,Original,Full Screen,[ARC1],[ARC2];", "P1O[3:2],Scandoubler Fx,None,HQ2x,CRT 25%,CRT 50%;", "P1O[5:4],Scale,Normal,V-Integer,Narrower HV-Integer,Wider HV-Integer;", "-;", "R8,Remove Cart;", "R0,Reset;", "J0,B,A,select,start;", "jn,B,A,Select,Start;", "jp,Y,B,Select,Start;", "V,v",`BUILD_DATE }; wire forced_scandoubler; wire [15:0] joystick_0, joystick_1; wire [1:0] buttons; wire [127:0] status; wire [10:0] ps2_key; wire [24:0] ioctl_addr; wire [7:0] ioctl_dout; wire [7:0] ioctl_index; wire ioctl_wr; wire ioctl_download; wire ioctl_wait; wire [21:0] gamma_bus; wire clk_sys; wire clk_vid; // Make a different clock to seperate intent in case the video rate needs change wire clock_locked; hps_io #(.CONF_STR(CONF_STR)) hps_io ( .clk_sys(clk_sys), .HPS_BUS(HPS_BUS), .gamma_bus(gamma_bus), .forced_scandoubler(forced_scandoubler), .buttons(buttons), .status(status), .status_menumask({status[14],en216p}), .ps2_key(ps2_key), .joystick_0(joystick_0), .joystick_1(joystick_1), .ioctl_download(ioctl_download), .ioctl_wr(ioctl_wr), .ioctl_addr(ioctl_addr), .ioctl_dout(ioctl_dout), .ioctl_wait(ioctl_wait), .ioctl_index(ioctl_index) ); /////////////////////// CLOCKS /////////////////////////////// pll pll ( .refclk(CLK_50M), .rst(0), .outclk_0(clk_sys) ); assign clk_vid = clk_sys; wire reset = RESET | status[0] | status[8] | buttons[1] | cart_download | bootrom_download; ////////////////////////////////////////////////////////////////// wire [7:0] R,G,B; wire HSync; wire VSync; wire HBlank; wire VBlank; wire ce_pix; wire [7:0] video; wire border = status[1]; wire [7:0] bootrom_dout, cart_dout; wire [15:0] cpu_addr_bus; wire bootrom_download = ioctl_download && ((ioctl_index[7:6] == 0 &&ioctl_index[5:0] == 0) || ioctl_index[5:0] == 2); wire cart_download = ioctl_download && ((ioctl_index[7:6] == 1 &&ioctl_index[5:0] == 0) || ioctl_index[5:0] == 1); wire text_download = ioctl_download && ioctl_index[5:0] == 3; reg [15:0] cart_mask = 0; reg [15:0] bios_mask = 0; always @(posedge clk_sys) begin if (cart_download && ioctl_wr) cart_mask <= ioctl_addr[15:0]; if (status[8]) cart_mask <= '0; end always @(posedge clk_sys) if (bootrom_download && ioctl_wr) bios_mask <= ioctl_addr[15:0]; wire [1:0] cart_wr; wire [7:0] cart_din; logic tape_adc; logic tape_adc_act; ltc2308_tape #(.CLK_RATE(42954545)) ltc2308_tape ( .clk(clk_sys), .reset(reset), .ADC_BUS(ADC_BUS), .dout(tape_adc), .active(tape_adc_act) ); // 16kb system ROM spram #(.addr_width(14), .mem_name("ROM")) bootrom ( .clock (clk_sys), .address (bootrom_download ? ioctl_addr : (cpu_addr_bus[13:0] & bios_mask[13:0])), .data (ioctl_dout), .enable (1), .wren (bootrom_download & ioctl_wr), .q (bootrom_dout), .cs (1) ); // 32kb cart ROM spram #(.addr_width(15), .mem_name("CART")) cartrom ( .clock (clk_sys), .address (cart_download ? ioctl_addr : cpu_addr_bus[14:0]), .data (cart_download ? ioctl_dout : cart_din), .enable (1), .wren (cart_download ? (cart_download & ioctl_wr) : |cart_wr), .q (cart_dout), .cs (1) ); wire [7:0] pa_out, pb_out; wire [7:0] pa_in, pb_in; wire pia_ca1, pia_ca2; wire [1:0] bank_mode = status[14] && !status[18] ? {1'b0, status[17]} : 2'b11; // Default to RAM unless cart. Why not? wire [1:0] page0_mode = status[14] ? status[16:15] : (status[13] ? 2'b10 : 2'b00); wire kb_matrix = status[14] ? status[19] : status[13]; assign pia_ca1 = kb_matrix ? tape_adc : 1'b1; creativision creativision ( .clk (clk_sys), .rom_size (cart_mask), .border (border), .pal (status[7]), .ca1_in (pia_ca1), .ca2_out (pia_ca2), .pa_out (pa_out), .pb_out (pb_out), .pa_in (kb_matrix ? pa_in : {tape_adc, pa_out[6:0]}), .pb_in (pb_in), .bank_mode (bank_mode), .page0_mode (page0_mode), .nmi (joystick_0[7] | joystick_1[7]), .reset (reset), .cart_write (cart_wr), .cart_dout (cart_din), .rom_do (cart_dout), .boot_do (bootrom_dout), .rom_addr (cpu_addr_bus), .audio (AUDIO_R), .red (R), .green (G), .blue (B), .VSync (VSync), .HSync (HSync), .VBlank (VBlank), .HBlank (HBlank), .ce_pix (ce_pix) ); assign CLK_VIDEO = clk_vid; wire [1:0] ar = status[122:121]; wire [3:0] vcopt = status[12:9]; wire [11:0] arx = (!ar) ? (border ? (status[7] ? 12'd2363 : 12'd142) : (status[7] ? 12'd512 : 12'd32)) : (ar - 1'd1); wire [11:0] ary = (!ar) ? (border ? (status[7] ? 12'd1868 : 12'd105) : (status[7] ? 12'd279 : 12'd21)) : 12'd0; wire [2:0] scale = status[3:2]; wire [2:0] sl = scale ? scale - 1'd1 : 3'd0; wire scandoubler = (scale || forced_scandoubler); assign VGA_SL = sl[1:0]; wire vcrop_en = status[6]; reg [4:0] voff; reg en216p; always @(posedge CLK_VIDEO) begin en216p <= ((HDMI_WIDTH == 1920) && (HDMI_HEIGHT == 1080) && !forced_scandoubler && !scale); voff <= (vcopt < 6) ? {vcopt,1'b0} : ({vcopt,1'b0} - 5'd24); end wire vga_de; video_freak video_freak ( .*, .VGA_DE_IN(vga_de), .ARX((!ar) ? arx : (ar - 1'd1)), .ARY((!ar) ? ary : 12'd0), .CROP_SIZE((en216p & vcrop_en) ? 10'd216 : 10'd0), .CROP_OFF(voff), .SCALE(status[5:4]) ); wire freeze_sync; video_mixer #(.LINE_LENGTH(372), .HALF_DEPTH(0), .GAMMA(1)) video_mixer ( .*, .VGA_DE(vga_de), .hq2x(scale==1), .HSync(HSync), .HBlank(HBlank), .VSync(VSync), .VBlank(VBlank), .R(R), .G(G), .B(B) ); wire [10:0] text_key; // 0x1800 big-endian 2 byte line sizes // 0x1400 big-endian 2 byte line sizes // FIXME: 0x1C00 to vram could probably be written directly filtering 0x0A newlines text_writer text_entry ( .clk (clk_sys), .reset (reset), .ascii_byte (ioctl_dout), .strobe (ioctl_wr), .input_wait (ioctl_wait), .ps2_key (text_key) ); cv_keyboard keyboard_from_hell ( .clk (clk_sys), .reset (reset), .ps2_key (text_download ? text_key[8:0] : ps2_key[8:0]), .ps2_keydown (text_download ? text_key[9] : ps2_key[9]), .ps2_strobe (text_download ? text_key[10] : ps2_key[10]), .joy1 (joystick_0), .joy2 (joystick_1), .select_a (pa_out), .select_b (pb_out), .code_b (pb_in), .code_a (pa_in) ); endmodule