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module CoolGirl # (
parameter USE_MAPPER_005 = 1, // MMC5 - Castlevania 3 only
parameter USE_MAPPER_009_010 = 1, // mapper #009 - MMC2, #10 - MMC4
parameter USE_MAPPER_011 = 1, // mapper #011 - Color Dreams
parameter USE_MAPPER_018 = 0, // mapper #018
parameter USE_MAPPER_021_022_023_025 = 1, // mappers #021, #022, #023, #025 - VRC2, VRC4
parameter USE_MAPPER_022 = 1, // mapper #022 - VRC2a (shifted CHR lines)
parameter USE_VRC4_INTERRUPTS = 1, // for VRC4
parameter USE_MAPPER_032 = 1, // mapper #032 - IREM-G101
parameter USE_MAPPER_033_048 = 1, // mappers #033 & #048 - Taito
parameter USE_MAPPER_048_INTERRUPTS = 1, // mapper #048 - Taito
parameter USE_MAPPER_065 = 1, // mapper #065 - Irem's H3001
parameter USE_MAPPER_066 = 1, // mapper #066 - GxROM
parameter USE_MAPPER_069 = 1, // mapper #069 - Sunsoft
parameter USE_MAPPER_071 = 1, // mapper #071 (for Fire Hawk only)
parameter USE_MAPPER_078 = 1, // mapper #078 - Holy Diver
parameter USE_MAPPER_087 = 1, // mapper #087
parameter USE_MAPPER_090 = 1, // mapper #090 - JY, for Aladdin only
parameter USE_MAPPER_093 = 1, // mapper #093
parameter USE_MAPPER_097 = 1, // mapper #097 - IREM TAMS1
parameter USE_MAPPER_118 = 1, // mapper #118 - TxSROM
parameter USE_MAPPER_163 = 0, // mapper #163
parameter USE_MAPPER_189 = 1, // mapper #189
parameter USE_MAPPER_228 = 1, // mapper #228 - Cheetahmen II only
parameter USE_FOUR_SCREEN = 1
)
(
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 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 [13:0] ppu_addr_in,
output [17:10] ppu_addr_out,
output ppu_rd_out,
output ppu_wr_out,
output ppu_ciram_a10,
input ppu_not_a13,
output ppu_ciram_ce,
output ppu_not_a13_out,
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;
reg four_screen = 0;
assign cpu_addr_out[26:13] = {cpu_base[26:14] | (cpu_addr_mapped[20:14] & ~prg_mask[20:14]), cpu_addr_mapped[13]};
assign sram_addr_out[14:13] = sram_page[1:0];
assign ppu_addr_out[17:10] = ext_ntram_access ? {6'b111111, ppu_addr_in[11:10]} : {ppu_addr_mapped[17:13] & ~chr_mask[17:13], ppu_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)
& ~cpu_data_out_enabled; // to switch data direction
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;
assign sram_we = cpu_rw_in | sram_ce_w;
assign sram_oe = ~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 = USE_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_out = 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 "mappers.vh"
endmodule
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