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use 1 bit map for screen

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This commit is contained in:
Nicholas Orlowsky 2024-04-06 16:38:23 -05:00
parent f949c2515b
commit 9804af7796
Signed by: nickorlow
GPG key ID: 838827D8C4611687
9 changed files with 51 additions and 43 deletions
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25
chip8.sv
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@ -3,7 +3,7 @@ module chip8 (
input wire rst_in
);
bit [31:0] vram[0:2047];
bit vram[0:2047];
bit [7:0] memory[0:4095];
bit keyboard[15:0];
@ -12,12 +12,18 @@ module chip8 (
bit [15:0] program_counter;
int cycle_counter;
bit rom_ready;
bit font_ready;
bit system_ready;
bit halt;
bit [7:0] random_number;
and(system_ready, rom_ready, font_ready);
beeper beeper (sound_timer);
cpu cpu (
rst_in,
system_ready,
memory,
clk_in,
keyboard,
@ -25,7 +31,7 @@ module chip8 (
cycle_counter,
program_counter,
vram,
sound_timer
sound_timer
);
gpu gpu (vram);
keyboard kb (
@ -39,10 +45,10 @@ module chip8 (
cycle_counter,
random_number
);
rom_loader loader (memory);
rom_loader loader (clk_in, rst_in, memory, rom_ready);
always_ff @(posedge clk_in) begin
if (rst_in) begin
always_ff @(negedge clk_in) begin
if (~font_ready) begin
bit [7:0] fontset[79:0] = {
8'hF0,
8'h90,
@ -130,11 +136,8 @@ module chip8 (
for (int i = 0; i < 80; i++) begin
memory[i] = fontset[79-i];
end
// Initialize keyboard bits
for (int i = 0; i < 15; i++) begin
keyboard[i] = 0;
end
font_ready = 1;
end
end
endmodule