mister-devel/ColecoVision_MiSTer
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Enable SG1000 mode.

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sorgelig
2019-01-06 20:27:54 +08:00
parent e40670576a
commit 4c105eb8cd
1 changed files with 33 additions and 5 deletions
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38
ColecoVision.sv
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@@ -123,12 +123,13 @@ parameter CONF_STR = {
"Coleco;;",
"-;",
"F,COLBINROM;",
"F,SG .Load SG-1000;",
"-;",
"O1,Aspect ratio,4:3,16:9;",
"O79,Scandoubler Fx,None,HQ2x,CRT 25%,CRT 50%;",
"-;",
"O45,RAM Size,1KB,8KB,SGM;",
"T6,Reset;",
"R0,Reset;",
"J,Fire 1,Fire 2,*,#,0,1,2,3,Purple Tr,Blue Tr;",
"V,v.",`BUILD_DATE
};
@@ -196,7 +197,7 @@ hps_io #(.STRLEN($size(CONF_STR)>>3)) hps_io
///////////////// RESET /////////////////////////
wire reset = RESET | status[0] | buttons[1] | status[6] | ioctl_download;
wire reset = RESET | status[0] | buttons[1] | ioctl_download;
///////////////// Memory ////////////////////////
@@ -210,15 +211,21 @@ spram #(13,8,"bios.mif") rom
.q(bios_d)
);
wire [14:0] ram_a;
wire [14:0] cpu_ram_a;
wire ram_we_n, ram_ce_n;
wire [7:0] ram_di;
wire [7:0] ram_do;
wire [14:0] ram_a = (sg1000 && dahjeeA) ? cpu_ram_a : // 32k
(status[5:4] == 1) ? cpu_ram_a[12:0] : // 8k
(status[5:4] == 0) ? cpu_ram_a[9:0] : // 1k
(sg1000) ? cpu_ram_a[12:0] : // SGM means 8k on SG1000
cpu_ram_a; // SGM/32k
spram #(15) ram
(
.clock(clk_sys),
.address((status[5:4] == 1) ? ram_a[12:0] : (!status[5:4]) ? ram_a[9:0] : ram_a),
.address(ram_a),
.wren(ce_10m7 & ~(ram_we_n | ram_ce_n)),
.data(ram_do),
.q(ram_di)
@@ -261,6 +268,21 @@ sdram sdram
.ready()
);
reg dahjeeA;
always @(posedge clk_sys) begin
reg [7:0] chksum;
if(sg1000 & ioctl_download & ioctl_wr) begin
if(!ioctl_addr) begin
chksum <= 0;
dahjeeA <= 0;
end
if(ioctl_addr[15:0] == 'h2000) chksum <= ioctl_dout;
else if(ioctl_addr[15:0] == 'h3fff) chksum <= chksum & ioctl_dout;
end
if(sg1000 && chksum == 'hFF) dahjeeA <= 1;
end
//////////////// Console ////////////////////////
@@ -286,12 +308,16 @@ wire [7:0] R,G,B;
wire hblank, vblank;
wire hsync, vsync;
wire sg1000 = |ioctl_index[4:0];
cv_console console
(
.clk_i(clk_sys),
.clk_en_10m7_i(ce_10m7),
.reset_n_i(~reset),
.por_n_o(),
.sg1000(sg1000),
.dahjeeA_i(dahjeeA),
.ctrl_p1_i(ctrl_p1),
.ctrl_p2_i(ctrl_p2),
@@ -302,11 +328,13 @@ cv_console console
.ctrl_p7_i(ctrl_p7),
.ctrl_p8_o(ctrl_p8),
.ctrl_p9_i(ctrl_p9),
.joy0_i(~{|joya[13:6], 1'b0, joya[5:0]}),
.joy1_i(~{|joyb[13:6], 1'b0, joyb[5:0]}),
.bios_rom_a_o(bios_a),
.bios_rom_d_i(bios_d),
.cpu_ram_a_o(ram_a),
.cpu_ram_a_o(cpu_ram_a),
.cpu_ram_we_n_o(ram_we_n),
.cpu_ram_ce_n_o(ram_ce_n),
.cpu_ram_d_i(ram_di),