mirror of
https://github.com/UzixLS/TSConf_MiST.git
synced 2025-07-18 14:51:25 +03:00
356 lines
8.1 KiB
Systemverilog
356 lines
8.1 KiB
Systemverilog
//============================================================================
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// Atari 800 replica
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//
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// Port to MiSTer
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// Copyright (C) 2017,2018 Sorgelig
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//
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// This program is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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//============================================================================
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module emu
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(
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//Master input clock
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input CLK_50M,
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//Async reset from top-level module.
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//Can be used as initial reset.
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input RESET,
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//Must be passed to hps_io module
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inout [44:0] HPS_BUS,
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//Base video clock. Usually equals to CLK_SYS.
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output CLK_VIDEO,
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//Multiple resolutions are supported using different CE_PIXEL rates.
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//Must be based on CLK_VIDEO
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output CE_PIXEL,
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//Video aspect ratio for HDMI. Most retro systems have ratio 4:3.
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output [7:0] VIDEO_ARX,
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output [7:0] VIDEO_ARY,
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output [7:0] VGA_R,
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output [7:0] VGA_G,
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output [7:0] VGA_B,
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output VGA_HS,
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output VGA_VS,
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output VGA_DE, // = ~(VBlank | HBlank)
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output LED_USER, // 1 - ON, 0 - OFF.
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// b[1]: 0 - LED status is system status OR'd with b[0]
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// 1 - LED status is controled solely by b[0]
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// hint: supply 2'b00 to let the system control the LED.
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output [1:0] LED_POWER,
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output [1:0] LED_DISK,
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output [15:0] AUDIO_L,
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output [15:0] AUDIO_R,
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output AUDIO_S, // 1 - signed audio samples, 0 - unsigned
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output [1:0] AUDIO_MIX, // 0 - no mix, 1 - 25%, 2 - 50%, 3 - 100% (mono)
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input TAPE_IN,
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// SD-SPI
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output SD_SCK,
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output SD_MOSI,
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input SD_MISO,
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output SD_CS,
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input SD_CD,
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//High latency DDR3 RAM interface
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//Use for non-critical time purposes
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output DDRAM_CLK,
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input DDRAM_BUSY,
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output [7:0] DDRAM_BURSTCNT,
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output [28:0] DDRAM_ADDR,
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input [63:0] DDRAM_DOUT,
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input DDRAM_DOUT_READY,
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output DDRAM_RD,
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output [63:0] DDRAM_DIN,
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output [7:0] DDRAM_BE,
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output DDRAM_WE,
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//SDRAM interface with lower latency
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output SDRAM_CLK,
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output SDRAM_CKE,
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output [12:0] SDRAM_A,
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output [1:0] SDRAM_BA,
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inout [15:0] SDRAM_DQ,
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output SDRAM_DQML,
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output SDRAM_DQMH,
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output SDRAM_nCS,
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output SDRAM_nCAS,
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output SDRAM_nRAS,
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output SDRAM_nWE
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);
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assign {DDRAM_CLK, DDRAM_BURSTCNT, DDRAM_ADDR, DDRAM_DIN, DDRAM_BE, DDRAM_RD, DDRAM_WE} = '0;
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assign LED_USER = vsd_sel & sd_act;
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assign LED_DISK = {1'b1, ~vsd_sel & sd_act};
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assign LED_POWER = 0;
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assign VIDEO_ARX = status[5] ? 8'd16 : 8'd4;
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assign VIDEO_ARY = status[5] ? 8'd9 : 8'd3;
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`include "build_id.v"
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localparam CONF_STR = {
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"TSConf;;",
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"O5,Aspect ratio,4:3,16:9;",
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"O12,Scandoubler Fx,None,HQ2x,CRT 25%,CRT 50%;",
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"O34,Stereo mix,None,25%,50%,100%;",
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"OS,General Sound,Enabled,Disabled;",
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"-;",
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"O67,CPU Speed,3.5MHz,7MHz,14MHz;",
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"O8,CPU Cache,On,Off;",
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"O9A,#7FFD span,128K,128K Auto,1024K,512K;",
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"OLN,ZX Palette,Default,B.black,Light,Pale,Dark,Grayscale,Custom;",
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"OPR,INT Offset,2,3,4,5,6,7,0,1;",
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"-;",
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"OBD,F11 Reset,boot.$C,sys.rom,ROM #00,ROM #04,RAM #F8;",
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"OEF, bank,TR-DOS,Basic 48,Basic 128,SYS;",
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"OGI,Shift+F11 Reset,ROM #00,ROM #04,RAM #F8,boot.$C,sys.rom;",
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"OJK, bank,Basic 128,SYS,TR-DOS,Basic 48;",
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"-;",
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"R0,Reset and apply settings;",
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"J,Fire 1,Fire 2;",
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"V,v1.10.",`BUILD_DATE
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};
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wire [27:0] CMOSCfg;
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// fix default values
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assign CMOSCfg[5:0] = 0;
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assign CMOSCfg[7:6] = status[7:6];
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assign CMOSCfg[8] = ~status[8];
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assign CMOSCfg[10:9] = status[10:9] + 1'd1;
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assign CMOSCfg[13:11]= (status[13:11] < 2) ? status[13:11] + 3'd3 : status[13:11] - 3'd2;
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assign CMOSCfg[15:14]= status[15:14];
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assign CMOSCfg[18:16]= status[18:16];
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assign CMOSCfg[20:19]= status[20:19] + 2'd2;
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assign CMOSCfg[23:21]= status[23:21];
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assign CMOSCfg[24] = 0;
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assign CMOSCfg[27:25]= status[27:25] + 3'd2;
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//////////////////// CLOCKS ///////////////////
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wire locked;
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wire clk_mem;
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wire clk_sys;
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wire clk_28m;
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pll pll
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(
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.refclk(CLK_50M),
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.rst(0),
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.outclk_0(clk_mem),
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.outclk_1(SDRAM_CLK),
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.outclk_2(clk_sys),
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.outclk_3(clk_28m),
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.locked(locked)
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);
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////////////////// HPS I/O ///////////////////
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wire [5:0] joy_0;
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wire [5:0] joy_1;
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wire [15:0] joya_0;
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wire [15:0] joya_1;
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wire [1:0] buttons;
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wire [31:0] status;
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wire [24:0] ps2_mouse;
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wire [10:0] ps2_key;
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wire forced_scandoubler;
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wire [31:0] sd_lba;
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wire sd_rd;
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wire sd_wr;
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wire sd_ack;
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wire [8:0] sd_buff_addr;
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wire [7:0] sd_buff_dout;
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wire [7:0] sd_buff_din;
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wire sd_buff_wr;
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wire img_mounted;
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wire img_readonly;
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wire [63:0] img_size;
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wire sd_ack_conf;
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wire [64:0] RTC;
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hps_io #(.STRLEN($size(CONF_STR)>>3)) hps_io
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(
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.clk_sys(clk_sys),
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.HPS_BUS(HPS_BUS),
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.conf_str(CONF_STR),
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.joystick_0(joy_0),
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.joystick_1(joy_1),
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.joystick_analog_0(joya_0),
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.joystick_analog_1(joya_1),
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.buttons(buttons),
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.status(status),
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.forced_scandoubler(forced_scandoubler),
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.RTC(RTC),
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.ps2_mouse(ps2_mouse),
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.ps2_key(ps2_key),
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.sd_lba(sd_lba),
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.sd_rd(sd_rd),
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.sd_wr(sd_wr),
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.sd_ack(sd_ack),
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.sd_ack_conf(sd_ack_conf),
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.sd_buff_addr(sd_buff_addr),
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.sd_buff_dout(sd_buff_dout),
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.sd_buff_din(sd_buff_din),
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.sd_buff_wr(sd_buff_wr),
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.img_mounted(img_mounted),
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.img_readonly(img_readonly),
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.img_size(img_size),
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.ioctl_wait(0)
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);
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wire [7:0] R,G,B;
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wire HBlank,VBlank;
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wire VSync, HSync;
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wire ce_vid;
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wire reset;
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tsconf tsconf
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(
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.clk_84mhz(clk_mem),
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.clk_28mhz(clk_28m),
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.SDRAM_DQ(SDRAM_DQ),
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.SDRAM_A(SDRAM_A),
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.SDRAM_BA(SDRAM_BA),
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.SDRAM_DQML(SDRAM_DQML),
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.SDRAM_DQMH(SDRAM_DQMH),
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.SDRAM_WE_N(SDRAM_nWE),
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.SDRAM_CAS_N(SDRAM_nCAS),
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.SDRAM_RAS_N(SDRAM_nRAS),
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.SDRAM_CKE(SDRAM_CKE),
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.SDRAM_CS_N(SDRAM_nCS),
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.VGA_R(R),
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.VGA_G(G),
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.VGA_B(B),
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.VGA_HS(HSync),
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.VGA_VS(VSync),
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.VGA_HBLANK(HBlank),
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.VGA_VBLANK(VBlank),
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.VGA_CEPIX(ce_vid),
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.SD_SO(sdmiso),
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.SD_SI(sdmosi),
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.SD_CLK(sdclk),
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.SD_CS_N(sdss),
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.GS_ENA(~status[28]),
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.SOUND_L(AUDIO_L),
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.SOUND_R(AUDIO_R),
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.COLD_RESET(RESET | status[0]),
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.WARM_RESET(buttons[1]),
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.RESET_OUT(reset),
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.RTC(RTC),
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.CMOSCfg(CMOSCfg),
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.PS2_KEY(ps2_key),
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.PS2_MOUSE(ps2_mouse),
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.joystick(joy_0[5:0] | joy_1[5:0])
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);
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assign AUDIO_S = 0;
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assign AUDIO_MIX = status[4:3];
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reg ce_pix;
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always @(posedge clk_sys) begin
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reg old_ce;
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old_ce <= ce_vid;
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ce_pix <= ~old_ce & ce_vid;
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end
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assign CLK_VIDEO = clk_sys;
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wire [1:0] scale = status[2:1];
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video_mixer video_mixer
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(
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.*,
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.ce_pix_out(CE_PIXEL),
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.scanlines({scale == 3, scale == 2}),
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.scandoubler(scale || forced_scandoubler),
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.hq2x(scale==1),
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.mono(0)
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);
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////////////////// SD ///////////////////
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wire sdclk;
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wire sdmosi;
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wire sdmiso = vsd_sel ? vsdmiso : SD_MISO;
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wire sdss;
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reg vsd_sel = 0;
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always @(posedge clk_sys) if(img_mounted) vsd_sel <= |img_size;
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wire vsdmiso;
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sd_card sd_card
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(
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.*,
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.clk_spi(clk_sys),
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.sdhc(1),
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.sck(sdclk),
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.ss(~vsd_sel | sdss),
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.mosi(sdmosi),
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.miso(vsdmiso)
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);
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assign SD_CS = vsd_sel | sdss;
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assign SD_SCK = sdclk & ~SD_CS;
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assign SD_MOSI = sdmosi & ~SD_CS;
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reg sd_act;
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always @(posedge clk_sys) begin
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reg old_mosi, old_miso;
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integer timeout = 0;
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old_mosi <= sdmosi;
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old_miso <= sdmiso;
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sd_act <= 0;
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if(timeout < 1000000) begin
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timeout <= timeout + 1;
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sd_act <= 1;
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end
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if((old_mosi ^ sdmosi) || (old_miso ^ sdmiso)) timeout <= 0;
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end
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endmodule
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