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Gameboy.sv
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Gameboy.sv
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//============================================================================
// Gameboy
// Copyright (c) 2015 Till Harbaum <till@harbaum.org>
//
// Port to MiSTer
// Copyright (C) 2017,2018 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.
//============================================================================
//LLAPI : llapi.sv needs to be in rtl folder and needs to be declared in file.qip (set_global_assignment -name SYSTEMVERILOG_FILE rtl/llapi.sv)
// Bootrom checksums
`define MISTER_CGB0_CHECKSUM 18'h2CE10
`define ORIGINAL_CGB_CHECKSUM 18'h2F3EA
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,
`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
);
assign ADC_BUS = 'Z;
assign VGA_F1 = 0;
assign {UART_RTS, UART_TXD, UART_DTR} = 0;
assign {SD_SCK, SD_MOSI, SD_CS} = 'Z;
assign LED_USER = ioctl_download | sav_pending;
assign LED_DISK = 0;
assign LED_POWER = 0;
//assign BUTTONS = 0;
//LLAPI: OSD combinaison
assign BUTTONS = llapi_osd;
//LLAPI
assign HDMI_FREEZE = 0;
assign VGA_SCALER= 0;
assign VGA_DISABLE = 0;
assign AUDIO_MIX = status[8:7];
// Status Bit Map: (0..31 => "O", 32..63 => "o")
// 0 1 2 3 4 5 6
// 01234567890123456789012345678901 23456789012345678901234567890123
// 0123456789ABCDEFGHIJKLMNOPQRSTUV 0123456789ABCDEFGHIJKLMNOPQRSTUV
// XXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXX
`include "build_id.v"
localparam CONF_STR = {
"GAMEBOY;SS3E000000:40000;",
"FS1,GBCGB BIN,Load ROM;",
"OEF,System,Auto,Gameboy,Gameboy Color,MegaDuck;",
"D7o79,Mapper,Auto,WisdomTree,Mani161,MBC1,MBC3;",
"-;",
"ONO,Super Game Boy,Off,Palette,On;",
"d5FC2,SGB,Load SGB border;",
"-;",
//LLAPI: OSD menu item
//LLAPI Always ON
"-,<< LLAPI enabled >>;",
"-,<< Use USER I/O port >>;",
"-;",
//END LLAPI
/*
"C,Cheats;",
"H1OO,Cheats Enabled,Yes,No;",
"-;",
*/
"C,Cheats;",
"h0OH,Cheats enabled,Yes,No;",
"-;",
"h2R9,Load Backup RAM;",
"h2RA,Save Backup RAM;",
"OD,Autosave,Off,On;",
"-;",
"OV,Savestates to SDCard,On,Off;",
"o01,Savestate Slot,1,2,3,4;",
"h3RS,Save state (Alt-F1);",
"h3RT,Restore state (F1);",
"-;",
"P1,Audio & Video;",
"P1-;",
"P1OC,Inverted color,No,Yes;",
"P1o4,Screen Shadow,No,Yes;",
"P1O12,Custom Palette,Off,Auto,On;",
"h1P1FC3,GBP,Load Palette;",
"P1-;",
"P1O34,Aspect ratio,Original,Full Screen,[ARC1],[ARC2];",
"P1OLM,Scale,Normal,V-Integer,Narrower HV-Integer,Wider HV-Integer;",
"P1OIK,Scandoubler Fx,None,HQ2x,CRT 25%,CRT 50%,CRT 75%;",
"P1O5,Stabilize video(buffer),Off,On;",
"P1OG,Frame blend,Off,On;",
"d4P1OU,GBC Colors,Corrected,Raw;",
"P1o2,Analog width,Narrow,Wide;",
"P1-;",
"P1O78,Stereo mix,none,25%,50%,100%;",
"P2,Bootroms;",
"P2-;",
"P2FC4,BIN,Load GBC Boot;",
"P2FC5,BIN,Load DMG Boot;",
"P2FC6,BIN,Load SGB Boot;",
"P2-;",
//"P2O6,Link Port,Disabled,Enabled;",
//"P2o6,Rumble,On,Off;",
//LLAPI: OSD menu item. swapped NONE with LLAPI. To detect LLAPI, status[63] = 1.
//LLAPI: Always double check witht the bits map allocation table to avoid conflicts
//"P2oUV,Serial Mode,None,Link Port,LLAPI;",
//LLAPI
"P2-;",
"d6P2O[37],GBC/GBA mode,GBC,GBA;",
"d8P2O[42],Fast boot,Off,On;",
"P3,Misc.;",
"P3-;",
"P3O6,Link Port,Disabled,Enabled;",
"P3o6,Rumble,On,Off;",
"P3-;",
"P3OP,FastForward Sound,On,Off;",
"P3OQ,Pause when OSD is open,Off,On;",
"P3OR,Rewind Capture,Off,On;",
"P3-;",
"P3o3,Super Game Boy + GBC,Off,On;",
"-;",
"R0,Reset;",
"J1,A,B,Select,Start,FastForward,Savestates,Rewind;",
"I,",
"Slot=DPAD|Save/Load=Pause+DPAD,",
"Active Slot 1,",
"Active Slot 2,",
"Active Slot 3,",
"Active Slot 4,",
"Save to state 1,",
"Restore state 1,",
"Save to state 2,",
"Restore state 2,",
"Save to state 3,",
"Restore state 3,",
"Save to state 4,",
"Restore state 4,",
"Rewinding...;",
"V,v",`BUILD_DATE
};
//////////////////// CLOCKS ///////////////////
wire clk_sys, clk_ram;
wire pll_locked;
assign CLK_VIDEO = clk_ram;
pll pll
(
.refclk(CLK_50M),
.rst(0),
.outclk_0(clk_ram),
.outclk_1(clk_sys),
.locked(pll_locked)
);
///////////////////////////////////////////////////
wire [63:0] status;
wire [1:0] buttons;
wire forced_scandoubler;
wire direct_video;
wire [21:0] gamma_bus;
wire ioctl_download;
wire ioctl_wr;
wire [24:0] ioctl_addr;
wire [15:0] ioctl_dout;
wire ioctl_wait;
//wire [15:0] joystick_0, joy0_unmod, joystick_1, joystick_2, joystick_3;
//LLAPI: Distinguish hps_io (usb) josticks from llapi joysticks
wire [15:0] joy_usb_0, joy_usb_1, joy_usb_2, joy_usb_3, joy_usb_4;
//LLAPI
wire [15:0] joystick_analog_0;
wire [10:0] ps2_key;
wire [7:0] filetype;
reg [31:0] sd_lba;
reg sd_rd = 0;
reg sd_wr = 0;
wire sd_ack;
wire [7:0] sd_buff_addr;
wire [15:0] sd_buff_dout;
wire [15:0] sd_buff_din;
wire sd_buff_wr;
wire img_mounted;
wire img_readonly;
wire [63:0] img_size;
wire [15:0] joy0_rumble;
wire [32:0] RTC_time;
wire sys_auto = (status[15:14] == 0);
wire sys_gbc = (status[15:14] == 2);
wire sys_megaduck = (status[15:14] == 3);
hps_io #(.CONF_STR(CONF_STR), .WIDE(1)) hps_io
(
.clk_sys(clk_sys),
.HPS_BUS(HPS_BUS),
.EXT_BUS(),
.ioctl_download(ioctl_download),
.ioctl_wr(ioctl_wr),
.ioctl_addr(ioctl_addr),
.ioctl_dout(ioctl_dout),
.ioctl_wait(ioctl_wait),
.ioctl_index(filetype),
.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),
.buttons(buttons),
.status(status),
.status_menumask({7'h0,
fastboot_available,
sys_megaduck, boot_gba_available, sgb_border_en, isGBC,
cart_ready, sav_supported, |tint, gg_available}),
.status_in({status[63:34],ss_slot,status[31:0]}),
.status_set(statusUpdate),
.direct_video(direct_video),
.gamma_bus(gamma_bus),
.forced_scandoubler(forced_scandoubler),
//.joystick_0(joy0_unmod),
//.joystick_1(joystick_1),
//.joystick_2(joystick_2),
//.joystick_3(joystick_3),
//LLAPI : renamed hps_io (usb) joysticks
.joystick_0(joy_usb_0),
.joystick_1(joy_usb_1),
.joystick_2(joy_usb_2),
.joystick_3(joy_usb_3),
.joystick_4(joy_usb_4),
//LLAPI
.joystick_l_analog_0(joystick_analog_0),
.joystick_0_rumble(joy0_rumble),
.ps2_key(ps2_key),
.info_req(ss_info_req),
.info(ss_info),
.TIMESTAMP(RTC_time)
);
assign joystick_0 = joy0_unmod[9] ? 16'b0 : joy0_unmod;
///////////////////////////////////////////////////
wire [14:0] cart_addr;
wire [22:0] mbc_addr;
wire cart_a15;
wire cart_rd;
wire cart_wr;
wire cart_oe;
wire [7:0] cart_di, cart_do;
wire nCS; // WRAM or Cart RAM CS
wire cart_download = ioctl_download && (filetype[5:0] == 6'h01 || filetype == 8'h80);
wire md_download = ioctl_download && (filetype == 8'h81);
wire palette_download = ioctl_download && (filetype == 3 /*|| !filetype*/);
wire sgb_border_download = ioctl_download && (filetype == 2);
wire cgb_boot_download = ioctl_download && (filetype == 4);
wire dmg_boot_download = ioctl_download && (filetype == 5);
wire sgb_boot_download = ioctl_download && (filetype == 6);
wire boot_download = cgb_boot_download | dmg_boot_download | sgb_boot_download;
///////////////////////////// Bootrom added features ///////////////////////////
// Fastboot is available for MiSTer-built bootroms (except SGB)
wire fastboot_available = !((isGBC && using_custom_cgb_bootrom && checksum_cgb != `MISTER_CGB0_CHECKSUM) || (!isGBC && using_custom_dmg_bootrom));
// GBA mode is available for MiSTer-built CGB bootroms and the original CGB bootrom.
// We verify that a loaded bootrom enables GBA mode by calculating a simple checksum.
wire boot_gba_available = (!using_custom_cgb_bootrom || using_real_cgb_bios || checksum_cgb == `MISTER_CGB0_CHECKSUM);
wire using_real_cgb_bios = (checksum_cgb == `ORIGINAL_CGB_CHECKSUM);
reg using_custom_dmg_bootrom = 0;
reg using_custom_cgb_bootrom = 0;
always @(posedge clk_sys) begin
if (cgb_boot_download)
using_custom_cgb_bootrom <= 1;
if (dmg_boot_download)
using_custom_dmg_bootrom <= 1;
end
reg boot_download_r;
always @(posedge clk_sys)
boot_download_r <= boot_download;
// Calculate checksum for incoming cgb bootrom downloads
reg [17:0] checksum_cgb;
always @(posedge clk_sys) begin
// Reset checksum on new boot download
if (cgb_boot_download && !boot_download_r)
checksum_cgb <= 0;
else if (cgb_boot_download && ioctl_wr)
checksum_cgb <= checksum_cgb + ioctl_dout[15:8] + ioctl_dout[7:0];
end
////////////////////////////////////////////////////////////////////////////////
wire [1:0] sdram_ds = cart_download ? 2'b11 : {mbc_addr[0], ~mbc_addr[0]};
wire [15:0] sdram_do;
wire [15:0] sdram_di = cart_download ? ioctl_dout : 16'd0;
wire [23:0] sdram_addr = cart_download? ioctl_addr[24:1]: {2'b00, mbc_addr[22:1]};
wire sdram_oe = ~cart_download & cart_rd & ~cram_rd;
wire sdram_we = cart_download & dn_write;
wire sdram_refresh_force;
wire sdram_autorefresh = !ff_on;
assign SDRAM_CKE = 1;
sdram sdram (
// interface to the MT48LC16M16 chip
.sd_data ( SDRAM_DQ ),
.sd_addr ( SDRAM_A ),
.sd_dqm ( {SDRAM_DQMH, SDRAM_DQML} ),
.sd_cs ( SDRAM_nCS ),
.sd_ba ( SDRAM_BA ),
.sd_we ( SDRAM_nWE ),
.sd_ras ( SDRAM_nRAS ),
.sd_cas ( SDRAM_nCAS ),
.sd_clk ( SDRAM_CLK ),
// system interface
.clk ( clk_ram ),
.sync ( ce_cpu2x ),
.init ( ~pll_locked ),
// cpu interface
.din ( sdram_di ),
.addr ( sdram_addr ),
.ds ( sdram_ds ),
.we ( sdram_we ),
.oe ( sdram_oe ),
.autorefresh ( sdram_autorefresh ),
.refresh ( sdram_refresh_force ),
.dout ( sdram_do )
);
////////////////// LLAPI ///////////////////
reg llapi_button_pressed, llapi_button_pressed2;
always @(posedge CLK_50M) begin
if (reset) begin
llapi_button_pressed <= 0;
llapi_button_pressed2 <= 0;
end else begin
if (|llapi_buttons)
llapi_button_pressed <= 1;
if (|llapi_buttons2)
llapi_button_pressed2 <= 1;
end
end
// controller id is 0 if there is either an Atari controller or no controller
// if id is 0, assume there is no controller until a button is pressed
// also check for 255 and treat that as 'no controller' as well
wire use_llapi = llapi_en && llapi_select && ((|llapi_type && ~(&llapi_type)) || llapi_button_pressed);
wire use_llapi2 = llapi_en2 && llapi_select && ((|llapi_type2 && ~(&llapi_type2)) || llapi_button_pressed2);
wire [31:0] llapi_buttons, llapi_buttons2;
wire [71:0] llapi_analog, llapi_analog2;
wire [7:0] llapi_type, llapi_type2;
wire llapi_en, llapi_en2;
wire llapi_select = 1'b1;
wire llapi_latch_o, llapi_latch_o2, llapi_data_o, llapi_data_o2;
//connection to USER_OUT port
always_comb begin
USER_OUT = 6'b111111;
if (llapi_select) begin
USER_OUT[0] = llapi_latch_o;
USER_OUT[1] = llapi_data_o;
USER_OUT[2] = ~(llapi_select & ~OSD_STATUS);//LED on Blister
USER_OUT[4] = llapi_latch_o2;
USER_OUT[5] = llapi_data_o2;
end else if (serial_ena) begin //Serial RAW optiom
USER_OUT[1] = ser_data_out;
USER_OUT[0] = sc_int_clock_out?ser_clk_out:1'b1;
end else begin
USER_OUT[0] = 1'b1;
USER_OUT[1] = 1'b1;
end
end
//Port 1 conf
LLAPI llapi
(
.CLK_50M(CLK_50M),
.LLAPI_SYNC(video_vs),
.IO_LATCH_IN(USER_IN[0]),
.IO_LATCH_OUT(llapi_latch_o),
.IO_DATA_IN(USER_IN[1]),
.IO_DATA_OUT(llapi_data_o),
.ENABLE(llapi_select & ~OSD_STATUS),
.LLAPI_BUTTONS(llapi_buttons),
.LLAPI_ANALOG(llapi_analog),
.LLAPI_TYPE(llapi_type),
.LLAPI_EN(llapi_en)
);
//Port 2 conf
LLAPI llapi2
(
.CLK_50M(CLK_50M),
.LLAPI_SYNC(video_vs),
.IO_LATCH_IN(USER_IN[4]),
.IO_LATCH_OUT(llapi_latch_o2),
.IO_DATA_IN(USER_IN[5]),
.IO_DATA_OUT(llapi_data_o2),
.ENABLE(llapi_select & ~OSD_STATUS),
.LLAPI_BUTTONS(llapi_buttons2),
.LLAPI_ANALOG(llapi_analog2),
.LLAPI_TYPE(llapi_type2),
.LLAPI_EN(llapi_en2)
);
// Indexes:
// 0 = D+ = P1 Latch
// 1 = D- = P1 Data
// 2 = TX- = LLAPI Enable
// 3 = GND_d = N/C
// 4 = RX+ = P2 Latch
// 5 = RX- = P2 Data
//Controller string provided by core for reference (order is important)
//Controller specific mapping based on type. More info here : https://docs.google.com/document/d/12XpxrmKYx_jgfEPyw-O2zex1kTQZZ-NSBdLO2RQPRzM/edit
//llapi_Buttons id are HID id - 1
//Port 1 mapping
// "J1,A,B,Select,Start,FastForward,Savestates,Rewind;",
wire [15:0] joy_ll_a;
always_comb begin
// map for saturn controller
// no select button so use Z
if (llapi_type == 3 || llapi_type == 8) begin
joy_ll_a = { 8'd0,
llapi_buttons[5], llapi_buttons[6],
llapi_buttons[0], llapi_buttons[1],
llapi_buttons[27], llapi_buttons[26], llapi_buttons[25], llapi_buttons[24]
};
end else begin
joy_ll_a = { 8'd0,
llapi_buttons[5], llapi_buttons[4],
llapi_buttons[0], llapi_buttons[1],
llapi_buttons[27], llapi_buttons[26], llapi_buttons[25], llapi_buttons[24]
};
end
end
//Port 2 mapping
wire [15:0] joy_ll_b;
always_comb begin
// map for saturn controller
// no select button so use Z
if (llapi_type2 == 3 || llapi_type2 == 8) begin
joy_ll_b = { 8'd0,
llapi_buttons2[5], llapi_buttons2[6],
llapi_buttons2[0], llapi_buttons2[1],
llapi_buttons2[27], llapi_buttons2[26], llapi_buttons2[25], llapi_buttons2[24]
};
end else begin
joy_ll_b = { 8'd0,
llapi_buttons2[5], llapi_buttons2[4],
llapi_buttons2[0], llapi_buttons2[1],
llapi_buttons2[27], llapi_buttons2[26], llapi_buttons2[25], llapi_buttons2[24]
};
end
end
//Assign (DOWN + START + FIRST BUTTON) Combinaison to bring the OSD up - P1 and P2 ports.
wire llapi_osd = (llapi_buttons[26] & llapi_buttons[5] & llapi_buttons[0]) || (llapi_buttons2[26] & llapi_buttons2[5] & llapi_buttons2[0]);
wire [15:0] joystick_0, joy0_unmod, joystick_1, joystick_2, joystick_3;
// if LLAPI is enabled, shift USB controllers over to the next available player slot
always_comb begin
if (use_llapi && use_llapi2) begin
joy0_unmod = joy_ll_a;
joystick_1 = joy_ll_b;
joystick_2 = joy_usb_0;
joystick_3 = joy_usb_1;
end else if (use_llapi || use_llapi2) begin
joy0_unmod = use_llapi ? joy_ll_a : joy_usb_0;
joystick_1 = use_llapi2 ? joy_ll_b : joy_usb_0;
joystick_2 = joy_usb_1;
joystick_3 = joy_usb_2;
end else begin
joy0_unmod = joy_usb_0;
joystick_1 = joy_usb_1;
joystick_2 = joy_usb_2;
joystick_3 = joy_usb_3;
end
end
////////////////// END LLAPI ///////////////////
wire dn_write;
wire cart_ready;
wire cram_rd, cram_wr;
wire [7:0] rom_do = (mbc_addr[0]) ? sdram_do[15:8] : sdram_do[7:0];
wire [7:0] ram_mask_file, cart_ram_size;
wire isGBC_game, isSGB_game;
wire cart_has_save;
wire [31:0] RTC_timestampOut;
wire [47:0] RTC_savedtimeOut;
wire RTC_inuse;
wire rumbling;
wire [2:0] mapper_sel = status[41:39];
assign joy0_rumble = {8'd0, ((rumbling & ~status[38]) ? 8'd128 : 8'd0)};
reg ce_32k; // 32768Hz clock for RTC
reg [9:0] ce_32k_div;
always @(posedge clk_sys) begin
ce_32k_div <= ce_32k_div + 1'b1;
ce_32k <= !ce_32k_div;
end
cart_top cart (
.reset ( reset ),
.clk_sys ( clk_sys ),
.ce_cpu ( ce_cpu ),
.ce_cpu2x ( ce_cpu2x ),
.speed ( speed ),
.megaduck ( megaduck ),
.mapper_sel ( mapper_sel ),
.cart_addr ( cart_addr ),
.cart_a15 ( cart_a15 ),
.cart_rd ( cart_rd ),
.cart_wr ( cart_wr ),
.cart_do ( cart_do ),
.cart_di ( cart_di ),
.cart_oe ( cart_oe ),
.nCS ( nCS ),
.mbc_addr ( mbc_addr ),
.dn_write ( dn_write ),
.cart_ready ( cart_ready ),
.cram_rd ( cram_rd ),
.cram_wr ( cram_wr ),
.cart_download ( cart_download ),
.ram_mask_file ( ram_mask_file ),
.ram_size ( cart_ram_size ),
.has_save ( cart_has_save ),
.isGBC_game ( isGBC_game ),
.isSGB_game ( isSGB_game ),
.ioctl_download ( ioctl_download ),
.ioctl_wr ( ioctl_wr ),
.ioctl_addr ( ioctl_addr ),
.ioctl_dout ( ioctl_dout ),
.ioctl_wait ( ioctl_wait ),
.bk_wr ( bk_wr ),
.bk_rtc_wr ( bk_rtc_wr ),
.bk_addr ( bk_addr ),
.bk_data ( bk_data ),
.bk_q ( bk_q ),
.img_size ( img_size ),
.rom_di ( rom_do ),
.joystick_analog_0 ( joystick_analog_0 ),
.ce_32k ( ce_32k ),
.RTC_time ( RTC_time ),
.RTC_timestampOut ( RTC_timestampOut ),
.RTC_savedtimeOut ( RTC_savedtimeOut ),
.RTC_inuse ( RTC_inuse ),
.SaveStateExt_Din ( SaveStateBus_Din ),
.SaveStateExt_Adr ( SaveStateBus_Adr ),
.SaveStateExt_wren( SaveStateBus_wren ),
.SaveStateExt_rst ( SaveStateBus_rst ),
.SaveStateExt_Dout( SaveStateBus_Dout ),
.savestate_load ( savestate_load ),
.sleep_savestate ( sleep_savestate ),
.Savestate_CRAMAddr ( Savestate_CRAMAddr ),
.Savestate_CRAMRWrEn ( Savestate_CRAMRWrEn ),
.Savestate_CRAMWriteData( Savestate_CRAMWriteData ),
.Savestate_CRAMReadData ( Savestate_CRAMReadData ),
.rumbling (rumbling)
);
reg [127:0] palette = 128'h828214517356305A5F1A3B4900000000;
always @(posedge clk_sys) begin
if (palette_download & ioctl_wr) begin
palette[127:0] <= {palette[111:0], ioctl_dout[7:0], ioctl_dout[15:8]};
end
end
wire lcd_clkena;
wire [14:0] lcd_data;
wire [1:0] lcd_mode;
wire [1:0] lcd_data_gb;
wire lcd_on;
wire lcd_vsync;
wire DMA_on;
assign AUDIO_S = 1;
wire reset = (RESET | status[0] | buttons[1] | cart_download | boot_download | bk_loading);
wire speed;
reg megaduck = 0;
reg isGBC = 0;
always @(posedge clk_sys) if(reset) begin
if (cart_download)
megaduck <= sys_megaduck;
if (md_download)
megaduck <= sys_auto || sys_megaduck;
if(~sys_auto) isGBC <= sys_gbc;
else if(cart_download) begin
if (!filetype[5:0]) isGBC <= isGBC_game;
else isGBC <= !filetype[7:6];
end
end
wire [15:0] GB_AUDIO_L;
wire [15:0] GB_AUDIO_R;
// the gameboy itself
gb gb (
.reset ( reset ),
.clk_sys ( clk_sys ),
.ce ( ce_cpu ), // the whole gameboy runs on 4mhnz
.ce_2x ( ce_cpu2x ), // ~8MHz in dualspeed mode (GBC)
.isGBC ( isGBC ),
.real_cgb_boot ( using_real_cgb_bios ),
.isSGB ( |sgb_en & ~isGBC ),
.megaduck ( megaduck ),
.joy_p54 ( joy_p54 ),
.joy_din ( joy_do_sgb ),
// interface to the "external" game cartridge
.ext_bus_addr( cart_addr ),
.ext_bus_a15 ( cart_a15 ),
.cart_rd ( cart_rd ),
.cart_wr ( cart_wr ),
.cart_do ( cart_do ),
.cart_di ( cart_di ),
.cart_oe ( cart_oe ),
.nCS ( nCS ),
.boot_gba_en ( boot_gba_available && status[37] ),
.fast_boot_en ( fastboot_available && status[42] ),
.cgb_boot_download ( cgb_boot_download ),
.dmg_boot_download ( dmg_boot_download ),
.sgb_boot_download ( sgb_boot_download ),
.ioctl_wr ( ioctl_wr ),
.ioctl_addr ( ioctl_addr ),
.ioctl_dout ( ioctl_dout ),
// audio
.audio_l ( GB_AUDIO_L ),
.audio_r ( GB_AUDIO_R ),
// interface to the lcd
.lcd_clkena ( lcd_clkena ),
.lcd_data ( lcd_data ),
.lcd_data_gb ( lcd_data_gb ),
.lcd_mode ( lcd_mode ),
.lcd_on ( lcd_on ),
.lcd_vsync ( lcd_vsync ),
.speed ( speed ),
.DMA_on ( DMA_on ),
// serial port
.sc_int_clock2(sc_int_clock_out),
.serial_clk_in(ser_clk_in),
.serial_data_in(ser_data_in),
.serial_clk_out(ser_clk_out),
.serial_data_out(ser_data_out),
// Palette download will disable cheats option (HPS doesn't distinguish downloads),
// so clear the cheats and disable second option (chheats enable/disable)
.gg_reset((code_download && ioctl_wr && !ioctl_addr) | cart_download | palette_download),
.gg_en(~status[17]),
.gg_code(gg_code),
.gg_available(gg_available),
// savestates
.increaseSSHeaderCount (!status[31]),
.cart_ram_size (cart_ram_size),
.save_state (ss_save),
.load_state (ss_load),
.savestate_number(ss_slot),
.sleep_savestate (sleep_savestate),
.SaveStateExt_Din (SaveStateBus_Din),
.SaveStateExt_Adr (SaveStateBus_Adr),
.SaveStateExt_wren(SaveStateBus_wren),
.SaveStateExt_rst (SaveStateBus_rst),
.SaveStateExt_Dout(SaveStateBus_Dout),
.SaveStateExt_load(savestate_load),
.Savestate_CRAMAddr (Savestate_CRAMAddr),
.Savestate_CRAMRWrEn (Savestate_CRAMRWrEn),
.Savestate_CRAMWriteData(Savestate_CRAMWriteData),
.Savestate_CRAMReadData (Savestate_CRAMReadData),
.SAVE_out_Din(ss_din), // data read from savestate
.SAVE_out_Dout(ss_dout), // data written to savestate
.SAVE_out_Adr(ss_addr), // all addresses are DWORD addresses!
.SAVE_out_rnw(ss_rnw), // read = 1, write = 0
.SAVE_out_ena(ss_req), // one cycle high for each action
.SAVE_out_be(ss_be),
.SAVE_out_done(ss_ack), // should be one cycle high when write is done or read value is valid
.rewind_on(status[27]),
.rewind_active(status[27] & joystick_0[10])
);
assign AUDIO_L = (fast_forward && status[25]) ? 16'd0 : GB_AUDIO_L;
assign AUDIO_R = (fast_forward && status[25]) ? 16'd0 : GB_AUDIO_R;
// the lcd to vga converter
wire [7:0] R,G,B;
wire video_hs, video_vs;
wire HBlank, VBlank;
wire ce_pix;
wire [8:0] h_cnt, v_cnt;
wire [1:0] tint = status[2:1];
wire h_end;
lcd lcd
(
// serial interface
.clk_sys( clk_sys ),
.ce ( ce_cpu ),
.lcd_clkena ( sgb_lcd_clkena ),
.data ( sgb_lcd_data ),
.mode ( sgb_lcd_mode ), // used to detect begin of new lines and frames
.on ( sgb_lcd_on ),
.lcd_vs ( sgb_lcd_vsync ),
.shadow ( status[36] ),
.isGBC ( isGBC ),
.tint ( |tint ),
.inv ( status[12] ),
.double_buffer( status[5]),
.frame_blend( status[16] ),
.originalcolors( status[30] ),
.analog_wide ( status[34] ),
// Palettes
.pal1 (palette[127:104]),
.pal2 (palette[103:80]),
.pal3 (palette[79:56]),
.pal4 (palette[55:32]),
.sgb_border_pix ( sgb_border_pix),
.sgb_pal_en ( sgb_pal_en ),
.sgb_en ( sgb_border_en ),
.sgb_freeze ( sgb_lcd_freeze),
.clk_vid( CLK_VIDEO ),
.hs ( video_hs ),
.vs ( video_vs ),
.hbl ( HBlank ),
.vbl ( VBlank ),
.r ( R ),
.g ( G ),
.b ( B ),
.ce_pix ( ce_pix ),
.h_cnt ( h_cnt ),
.v_cnt ( v_cnt ),
.h_end ( h_end )
);
wire [1:0] joy_p54;
wire [3:0] joy_do_sgb;
wire [14:0] sgb_lcd_data;
wire [15:0] sgb_border_pix;
wire sgb_lcd_clkena, sgb_lcd_on, sgb_lcd_vsync, sgb_lcd_freeze;
wire [1:0] sgb_lcd_mode;
wire sgb_pal_en;
wire [1:0] sgb_en = status[24:23];
wire sgb_border_en = sgb_en[1];
sgb sgb (
.reset ( reset ),
.clk_sys ( clk_sys ),
.ce ( ce_cpu ),