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Merge pull request #80 from gyurco/archie

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[Archie] Hold the CPU until the ROM is downloaded
This commit is contained in:
gyurco
2019-02-18 22:30:33 +01:00
committed by GitHub
parent bc1bde24fa 5510e93b27
commit 14643d1ac1
1 changed files with 5 additions and 1 deletions
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6
cores/archie/fpga/mist/archimedes_mist_top.v
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@@ -86,6 +86,7 @@ wire [15:0] coreaud_l, coreaud_r;
wire loader_active /* synthesis keep */ ;
wire loader_we /* synthesis keep */ ;
reg loader_stb = 1'b0 /* synthesis keep */ ;
reg rom_ready = 0;
(*KEEP="TRUE"*)wire [3:0] loader_sel /* synthesis keep */ ;
(*KEEP="TRUE"*)wire [23:0] loader_addr /* synthesis keep */ ;
(*KEEP="TRUE"*)wire [31:0] loader_data /* synthesis keep */ ;
@@ -223,7 +224,7 @@ archimedes_top ARCHIMEDES(
.CLKPIX_I ( clk_pix ), // pixel clock for OSD
.CEPIX_O ( ce_pix ),
.RESET_I (~ram_ready | loader_active),
.RESET_I (~ram_ready | ~rom_ready),
.MEM_ACK_I ( core_ack_in ),
.MEM_DAT_I ( core_data_in ),
@@ -323,7 +324,10 @@ audio AUDIO (
);
always @(posedge clk_32m) begin
reg loader_active_old;
loader_active_old <= loader_active;
if (loader_active_old & ~loader_active) rom_ready <= 1;
if (loader_we) begin
loader_stb <= 1'b1;