diff options
Diffstat (limited to 'CoolGirl_rev6.x/CoolGirl.v')
| -rw-r--r-- | CoolGirl_rev6.x/CoolGirl.v | 184 |
1 files changed, 93 insertions, 91 deletions
diff --git a/CoolGirl_rev6.x/CoolGirl.v b/CoolGirl_rev6.x/CoolGirl.v index 897b860..88f84bf 100644 --- a/CoolGirl_rev6.x/CoolGirl.v +++ b/CoolGirl_rev6.x/CoolGirl.v @@ -1,91 +1,93 @@ -/*
- COOLGIRL Multicart branch 6.x
-*/
-
-module CoolGirl # (
- `include "../CoolGirl_config.vh"
-)
-(
- input m2,
- input romsel,
- input cpu_rw_in,
- input [14:0] cpu_addr_in,
- inout [7:0] cpu_data_in,
- output [26:13] cpu_addr_out,
- output [14:13] sram_addr_out,
- output cpu_shifers_oe,
- output cpu_dir,
- output flash_we,
- output flash_oe,
- output flash_ce,
- output sram_ce,
- output sram_we,
- output sram_oe,
-
- input ppu_rd_in,
- input ppu_wr_in,
- input [13:3] ppu_addr_in,
- output [18:10] ppu_addr_out,
- output ppu_rd_out,
- output ppu_wr_out,
- output ppu_ciram_a10,
- inout ppu_not_a13,
- output ppu_ciram_ce,
-
- output irq
-);
- reg [3:0] new_dendy_init = 4'b1111;
- reg [1:0] new_dendy_init_a13l = 2'b11;
- reg [1:0] new_dendy_init_a13h = 2'b11;
- wire new_dendy_init_finished = new_dendy_init == 0;
- reg new_dendy = 0;
- assign cpu_shifers_oe = 1'b0;
-
- assign cpu_addr_out[26:13] = {prg_base[26:14] | (prg_addr_mapped[20:14] & ~prg_mask[20:14]), prg_addr_mapped[13]};
- assign sram_addr_out[14:13] = sram_page[1:0];
- assign ppu_addr_out[18:10] = ext_ntram_access
- ? {7'b1111111, ppu_addr_in[11:10]}
- : {~(chr_addr_mapped[18] & ~chr_mask[18]), chr_addr_mapped[17:13] & ~chr_mask[17:13], chr_addr_mapped[12:10]};
-
- assign cpu_data_in = cpu_data_out_enabled ? cpu_data_out : 8'bZZZZZZZZ;
- wire flash_ce_w = ~(~romsel | (m2 & map_rom_on_6000 & cpu_addr_in[14] & cpu_addr_in[13]));
- assign flash_ce = flash_ce_w | cpu_data_out_enabled;
- assign flash_oe = ~cpu_rw_in | flash_ce_w;
- assign flash_we = cpu_rw_in | flash_ce_w | ~prg_write_enabled;
- wire sram_ce_w = ~(cpu_addr_in[14] & cpu_addr_in[13] & m2 & romsel & sram_enabled & ~map_rom_on_6000);
- assign sram_ce = sram_ce_w | cpu_data_out_enabled;
- assign sram_we = cpu_rw_in | sram_ce_w;
- assign sram_oe = ~cpu_rw_in | sram_ce_w;
- assign cpu_dir = (~cpu_rw_in | flash_ce_w) & (~cpu_rw_in | sram_ce_w) & ~cpu_data_out_enabled;
- assign ppu_rd_out = ppu_rd_in | (ppu_addr_in[13] & ~ext_ntram_access);
- assign ppu_wr_out = ppu_wr_in | ((ppu_addr_in[13] | ~chr_write_enabled) & ~ext_ntram_access);
- wire ext_ntram_access = ENABLE_FOUR_SCREEN && four_screen && ppu_addr_in[13] && ~ppu_addr_in[12]; // four-screen and $2000-$2FFF accessed
- assign ppu_ciram_ce = new_dendy_init_finished ?
- (new_dendy ? 1'bZ : // not used by new famiclones
- ext_ntram_access ? 1'b1 : // disable internal NTRAM
- ~ppu_addr_in[13] /*1'bZ*/) // enable it otherwise
- : 1'b0; // ground it while powering on for new famiclones
- assign ppu_not_a13 = new_dendy_init_finished ? 1'bZ : 1'b0; // ground it while powering on for new famiclones
-
- always @ (posedge m2)
- begin
- if (!new_dendy_init_finished)
- new_dendy_init = new_dendy_init - 1'b1;
- end
-
- always @ (negedge ppu_rd_in)
- begin
- if (new_dendy_init_finished)
- begin
- if ((new_dendy_init_a13l != 0) &&
- (new_dendy_init_a13h != 0) &&
- (ppu_addr_in[13] != ~ppu_not_a13))
- new_dendy = 1;
- if (~ppu_addr_in[13] && new_dendy_init_a13l != 0) new_dendy_init_a13l = new_dendy_init_a13l - 1'b1;
- if (ppu_addr_in[13] && new_dendy_init_a13h != 0) new_dendy_init_a13h = new_dendy_init_a13h - 1'b1;
- end
- end
-
-`include "../CoolGirl_mappers.vh"
-
-endmodule
+/* + COOLGIRL Multicart branch 6.x +*/ + +module CoolGirl # ( + `include "../CoolGirl_config.vh" +) +( + input m2, + input romsel, + input cpu_rw_in, + input [14:0] cpu_addr_in, + inout [7:0] cpu_data_in, + output [26:13] cpu_addr_out, + output [14:13] sram_addr_out, + output cpu_shifers_oe, + output cpu_dir, + output flash_we, + output flash_oe, + output flash_ce, + output sram_ce, + output sram_we, + output sram_oe, + + input ppu_rd_in, + input ppu_wr_in, + input [13:3] ppu_addr_in, + output [18:10] ppu_addr_out, + output ppu_rd_out, + output ppu_wr_out, + output ppu_ciram_a10, + inout ppu_not_a13, + output ppu_ciram_ce, + + output irq +); + reg [3:0] new_dendy_init = 4'b1111; + reg [1:0] new_dendy_init_a13l = 2'b11; + reg [1:0] new_dendy_init_a13h = 2'b11; + wire new_dendy_init_finished = new_dendy_init == 0; + reg new_dendy = 0; + assign cpu_shifers_oe = 1'b0; + + assign cpu_addr_out[26:13] = {prg_base[26:14] | (prg_addr_mapped[20:14] & ~prg_mask[20:14]), prg_addr_mapped[13]}; + assign sram_addr_out[14:13] = sram_page[1:0]; + assign ppu_addr_out[18:10] = ext_ntram_access + ? {7'b1111111, ppu_addr_in[11:10]} + : {~(chr_addr_mapped[18] & ~chr_mask[18]), chr_addr_mapped[17:13] & ~chr_mask[17:13], chr_addr_mapped[12:10]}; + + assign cpu_data_in = cpu_data_out_enabled ? cpu_data_out : 8'bZZZZZZZZ; + wire flash_ce_w = ~(~romsel | (m2 & map_rom_on_6000 & cpu_addr_in[14] & cpu_addr_in[13])); + assign flash_ce = flash_ce_w | cpu_data_out_enabled; + assign flash_oe = ~cpu_rw_in | flash_ce_w; + assign flash_we = cpu_rw_in | flash_ce_w | ~prg_write_enabled; + wire sram_ce_w = ~(cpu_addr_in[14] & cpu_addr_in[13] & m2 & romsel & sram_enabled & ~map_rom_on_6000); + assign sram_ce = sram_ce_w | cpu_data_out_enabled; + assign sram_we = cpu_rw_in | sram_ce_w; + assign sram_oe = ~cpu_rw_in | sram_ce_w; + assign cpu_dir = (~cpu_rw_in | flash_ce_w) & (~cpu_rw_in | sram_ce_w) & ~cpu_data_out_enabled; + assign ppu_rd_out = ppu_rd_in | (ppu_addr_in[13] & ~ext_ntram_access); + assign ppu_wr_out = ppu_wr_in | ((ppu_addr_in[13] | ~chr_write_enabled) & ~ext_ntram_access); + wire ext_ntram_access = ENABLE_FOUR_SCREEN && four_screen && ppu_addr_in[13] && ~ppu_addr_in[12]; // four-screen and $2000-$2FFF accessed + assign ppu_ciram_ce = new_dendy_init_finished ? + (new_dendy ? 1'bZ : // not used by new famiclones + ext_ntram_access ? 1'b1 : // disable internal NTRAM + ~ppu_addr_in[13] /*1'bZ*/) // enable it otherwise + : 1'b0; // ground it while powering on for new famiclones + assign ppu_not_a13 = new_dendy_init_finished ? 1'bZ : 1'b0; // ground it while powering on for new famiclones + + always @ (posedge m2) + begin + if (!new_dendy_init_finished) + new_dendy_init <= new_dendy_init - 1'b1; + end + + always @ (negedge ppu_rd_in) + begin + if (new_dendy_init_finished) + begin + if ((new_dendy_init_a13l != 0) && + (new_dendy_init_a13h != 0) && + (ppu_addr_in[13] != ~ppu_not_a13)) + new_dendy <= 1; + if (~ppu_addr_in[13] && new_dendy_init_a13l != 0) + new_dendy_init_a13l <= new_dendy_init_a13l - 1'b1; + if (ppu_addr_in[13] && new_dendy_init_a13h != 0) + new_dendy_init_a13h <= new_dendy_init_a13h - 1'b1; + end + end + +`include "../CoolGirl_mappers.vh" + +endmodule |