diff options
Diffstat (limited to 'CoolGirl_mappers.vh')
| -rw-r--r-- | CoolGirl_mappers.vh | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/CoolGirl_mappers.vh b/CoolGirl_mappers.vh index 8758955..c2a7ca4 100644 --- a/CoolGirl_mappers.vh +++ b/CoolGirl_mappers.vh @@ -254,7 +254,7 @@ begin begin // scanline mode
vrc4_irq_prescaler = vrc4_irq_prescaler + 1'b1; // count prescaler
if ((vrc4_irq_prescaler_counter[1] == 0 && vrc4_irq_prescaler == 114)
- || (vrc4_irq_prescaler_counter[1] == 1 && vrc4_irq_prescaler == 113)) // 114, 114, 113
+ || (vrc4_irq_prescaler_counter[1] == 1 && vrc4_irq_prescaler == 113)) // 114, 114, 113
begin
vrc4_irq_prescaler = 0;
vrc4_irq_prescaler_counter = vrc4_irq_prescaler_counter + 1'b1;
@@ -293,8 +293,8 @@ begin // IRQ for Sunsoft FME-7
if (ENABLE_MAPPER_069 & mapper69_counter_enabled)
begin
- reg carry;
- {carry, mapper69_irq_value[15:0]} = {1'b0, mapper69_irq_value[15:0]} - 1'b1;
+ reg carry;
+ {carry, mapper69_irq_value[15:0]} = {1'b0, mapper69_irq_value[15:0]} - 1'b1;
if (mapper69_irq_enabled && carry) mapper69_irq_out = 1;
end
@@ -1100,7 +1100,7 @@ begin 4'b1101: begin
mapper69_irq_out = 0; // ack
mapper69_counter_enabled = cpu_data_in[7];
- mapper69_irq_enabled = cpu_data_in[0];
+ mapper69_irq_enabled = cpu_data_in[0];
end
4'b1110: mapper69_irq_value[7:0] = cpu_data_in[7:0]; // IRQ low
4'b1111: mapper69_irq_value[15:8] = cpu_data_in[7:0]; // IRQ high
@@ -1153,6 +1153,23 @@ begin prg_bank_6000[3:0] = cpu_data_in[4:1];
map_rom_on_6000 = 1;
end
+
+ // Mapper #75 - VRC1
+ if (ENABLE_MAPPER_075 && (mapper == 6'b100010))
+ begin
+ case (cpu_addr_in[14:12])
+ 3'b000: prg_bank_a[3:0] = cpu_data_in[3:0]; // $8000-$8FFF
+ 3'b001: begin // $9000-$9FFF
+ mirroring = {1'b0, cpu_data_in[0]};
+ chr_bank_a[6] = cpu_data_in[1];
+ chr_bank_e[6] = cpu_data_in[2];
+ end
+ 3'b010: prg_bank_b[3:0] = cpu_data_in[3:0]; // $A000-$AFFF
+ 3'b100: prg_bank_c[3:0] = cpu_data_in[3:0]; // $C000-$CFFF
+ 3'b110: chr_bank_a[5:2] = cpu_data_in[3:0]; // $E000-$EFFF
+ 3'b111: chr_bank_e[5:2] = cpu_data_in[3:0]; // $F000-$FFFF
+ endcase
+ end
end // romsel
end // write
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