-
`timescale 1ns / 1ps
+
module SimROM(
input [15:0] address,
inout [7:0] data,
inout [7:0] data,
input wr, rd,
output wire cr_nADV, cr_nCE, cr_nOE, cr_nWE, cr_CRE, cr_nLB, cr_nUB, cr_CLK,
+ output wire st_nCE, st_nRST,
output wire [22:0] cr_A,
inout [15:0] cr_DQ);
parameter ADDR_PROGADDRM = 16'hFF61;
parameter ADDR_PROGADDRL = 16'hFF62;
parameter ADDR_PROGDATA = 16'hFF63;
+ parameter ADDR_PROGFLASH = 16'hFF65;
parameter ADDR_MBC = 16'hFF64;
reg rdlatch = 0, wrlatch = 0;
// low 7 bits are the MBC that we are emulating
assign cr_nADV = 0; /* Addresses are always valid! :D */
- assign cr_nCE = 0; /* The chip is enabled */
+ assign cr_nCE = ~(addrlatch != ADDR_PROGFLASH); /* The chip is enabled */
assign cr_nLB = 0; /* Lower byte is enabled */
assign cr_nUB = 0; /* Upper byte is enabled */
assign cr_CRE = 0; /* Data writes, not config */
assign cr_CLK = 0; /* Clock? I think not! */
- wire decode = (addrlatch[15:14] == 2'b00) /* extrom */ || (addrlatch[15:13] == 3'b101) /* extram */ || (addrlatch == ADDR_PROGDATA);
+ assign st_nRST = 1; /* Keep the strataflash out of reset. */
+ assign st_nCE = ~(addrlatch == ADDR_PROGFLASH);
+
+ wire decode = (addrlatch[15:14] == 2'b00) /* extrom */ || (addrlatch[15:13] == 3'b101) /* extram */ || (addrlatch == ADDR_PROGDATA) || (addrlatch == ADDR_PROGFLASH);
reg [3:0] rambank = 0;
reg [8:0] rombank = 1;
assign cr_nOE = decode ? ~rdlatch : 1;
- assign cr_nWE = (decode && ((addrlatch == ADDR_PROGDATA) || (mbc_emul[6:0] == 0))) ? ~wrlatch : 1;
+ assign cr_nWE = (decode && ((addrlatch == ADDR_PROGDATA) || (addrlatch == ADDR_PROGFLASH) || (mbc_emul[6:0] == 0) || (addrlatch[15:13] == 3'b101))) ? ~wrlatch : 1;
assign cr_DQ = (~cr_nOE) ? 16'bzzzzzzzzzzzzzzzz : {8'b0, datalatch};
assign cr_A = (addrlatch[15:14] == 2'b00) ? /* extrom, home bank */ {9'b0,addrlatch[13:0]} :
(addrlatch[15:14] == 2'b01) ? /* extrom, paged bank */ {rombank, addrlatch[13:0]} :
(addrlatch[15:13] == 3'b101) ? /* extram */ {1'b1, 5'b0, rambank, addrlatch[12:0]} :
- (addrlatch == ADDR_PROGDATA) ? progaddr :
+ ((addrlatch == ADDR_PROGDATA) || (addrlatch == ADDR_PROGFLASH)) ? progaddr :
23'b0;
always @(posedge clk) begin
progaddr <= {progaddrh[6:0], progaddrm[7:0], progaddrl[7:0]};
{progaddrh[6:0], progaddrm[7:0], progaddrl[7:0]} <= {progaddrh[6:0], progaddrm[7:0], progaddrl[7:0]} + 23'b1;
end
+ ADDR_PROGFLASH: if (rd || wr) begin
+ progaddr <= {progaddrh[6:0], progaddrm[7:0], progaddrl[7:0]};
+ {progaddrh[6:0], progaddrm[7:0], progaddrl[7:0]} <= {progaddrh[6:0], progaddrm[7:0], progaddrl[7:0]} + 23'b1;
+ end
ADDR_MBC: begin
mbc_emul <= data;
rambank <= 0;
input serin,
output wire [3:0] digits,
output wire [7:0] seven,
- output wire cr_nADV, cr_nCE, cr_nOE, cr_nWE, cr_CRE, cr_nLB, cr_nUB, cr_CLK,
+ output wire cr_nADV, cr_nCE, cr_nOE, cr_nWE, cr_CRE, cr_nLB, cr_nUB, cr_CLK, st_nCE, st_nRST,
output wire [22:0] cr_A,
inout [15:0] cr_DQ,
+ input ps2c, ps2d,
+ output txp, txm,
+ input rxp, rxm,
`endif
output wire hs, vs,
output wire [2:0] r, g,
wire [7:0] switches = 8'b0;
wire [3:0] buttons = 4'b0;
`else
- wire xtalb, clk, vgaclk;
+ wire xtalb, clk, vgaclk, ethclk;
IBUFG iclkbuf(.O(xtalb), .I(xtal));
- CPUDCM dcm (.CLKIN_IN(xtalb), .CLKFX_OUT(clk));
+ CPUDCM cpudcm (.CLKIN_IN(xtalb), .CLKFX_OUT(clk));
pixDCM pixdcm (.CLKIN_IN(xtalb), .CLKFX_OUT(vgaclk));
+ ethDCM ethdcm (.CLKIN_IN(xtalb), .CLKFX_OUT(ethclk));
+ wire [7:0] ps2buttons;
`endif
wire [15:0] addr [1:0];
wire [7:0] data [1:0];
wire wr [1:0], rd [1:0];
- wire irq, tmrirq, lcdcirq, vblankirq;
+ wire irq, tmrirq, lcdcirq, vblankirq, btnirq;
wire [7:0] jaddr;
wire [1:0] state;
wire ack;
.cr_nUB(cr_nUB),
.cr_CLK(cr_CLK),
.cr_A(cr_A),
- .cr_DQ(cr_DQ));
+ .cr_DQ(cr_DQ),
+ .st_nCE(st_nCE),
+ .st_nRST(st_nRST));
`endif
wire lcdhs, lcdvs, lcdclk;
.vgag(g),
.vgab(b));
+ wire [7:0] sleds;
+`ifdef isim
+ assign leds = sleds;
+`else
+ assign leds = sleds | ps2buttons;
+`endif
Switches sw(
.clk(clk),
.address(addr[0]),
.data(data[0]),
.wr(wr[0]),
.rd(rd[0]),
- .ledout(leds),
+ .ledout(sleds),
.switches(switches)
);
+
+`ifdef isim
+`else
+ PS2Button ps2(
+ .clk(clk),
+ .inclk(ps2c),
+ .indata(ps2d),
+ .buttons(ps2buttons)
+ );
+`endif
+
+ Buttons ass(
+ .core_clk(clk),
+ .addr(addr[0]),
+ .data(data[0]),
+ .wr(wr[0]),
+ .rd(rd[0]),
+ .int(btnirq),
+ `ifdef isim
+ .buttons(switches)
+ `else
+ .buttons(ps2buttons)
+ `endif
+ );
AddrMon amon(
.clk(clk),
.lcdc(lcdcirq),
.tovf(tmrirq),
.serial(1'b0),
- .buttons(1'b0),
+ .buttons(btnirq),
.master(irq),
.ack(ack),
.jaddr(jaddr));
.wr(wr[0]),
.snd_data_l(soundl),
.snd_data_r(soundr));
+
+`ifdef isim
+`else
+ Ethernet eth(
+ .clk(clk),
+ .wr(wr[0]),
+ .rd(rd[0]),
+ .addr(addr[0]),
+ .data(data[0]),
+ .ethclk(ethclk),
+ .rxclk(xtalb),
+ .txp(txp),
+ .txm(txm),
+ .rxp(rxp),
+ .rxm(rxm));
+`endif
endmodule
git.joshuawise.com / fpgaboy.git / blobdiff