New parameter - variable size for MMC3

2 files changed, 4 insertions, 3 deletions

diff --git a/CoolGirl.v b/CoolGirl.v
index e4edffd..62050af 100644
--- a/CoolGirl.v
+++ b/CoolGirl.v
@@ -29,7 +29,8 @@ module CoolGirl # (
 		parameter USE_MAPPER_228 = 1, 				// mapper #228 - Cheetahmen II only

 		parameter USE_MAPPER_241 = 1, 				// mapper #241 - BNROM

 		

-		parameter USE_FOUR_SCREEN = 1

+		parameter USE_FOUR_SCREEN = 1,

+		parameter MMC3_BITSIZE = 8						// Maximum size for MMC3 PRG (6=512KB - standard size, 8=2MB - required for some hacks)

 	)

 	(

 	input	m2,

diff --git a/mappers.vh b/mappers.vh
index 48f4c39..784faaf 100644
--- a/mappers.vh
+++ b/mappers.vh
@@ -779,8 +779,8 @@
 								3'b011: chr_bank_f = cpu_data_in;

 								3'b100: chr_bank_g = cpu_data_in;

 								3'b101: chr_bank_h = cpu_data_in;

-								3'b110: if (!USE_MAPPER_189 | ~flags[1]) prg_bank_a[7:0] = cpu_data_in[7:0];

-								3'b111: if (!USE_MAPPER_189 | ~flags[1]) prg_bank_b[7:0] = cpu_data_in[7:0];

+								3'b110: if (!USE_MAPPER_189 | ~flags[1]) prg_bank_a[(MMC3_BITSIZE-1):0] = cpu_data_in[(MMC3_BITSIZE-1):0];

+								3'b111: if (!USE_MAPPER_189 | ~flags[1]) prg_bank_b[(MMC3_BITSIZE-1):0] = cpu_data_in[(MMC3_BITSIZE-1):0];

 							endcase

 						end

 						3'b010: mirroring = {1'b0, cpu_data_in[0]}; // $A000-$BFFE, even (mirroring)