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Code Issues Releases Wiki Activity

Midi irq handling fix

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This commit is contained in:
harbaum
2013-06-04 19:38:28 +00:00
parent f6a65211c3
commit efdc6f7a4a
1 changed files with 5 additions and 13 deletions
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18
cores/mist/mfp.v
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@@ -236,12 +236,9 @@ always @(iack, sel, ds, rw, addr, gpip_cpu_out, aer, ddr, ier, ipr, isr, imr,
end
// delay de and timer to detect changes
reg acia_irqD, acia_irqD2, dma_irqD, dma_irqD2;
reg [7:0] irq_vec;
always @(posedge clk) begin
acia_irqD <= acia_irq;
dma_irqD <= dma_irq;
iackD <= iack;
// the pending irq changes in the middle of an iack
@@ -252,9 +249,6 @@ end
reg iackD;
always @(negedge clk) begin
dma_irqD2 <= dma_irqD;
acia_irqD2 <= acia_irqD;
if(reset) begin
ipr <= 16'h0000; ier <= 16'h0000;
imr <= 16'h0000; isr <= 16'h0000;
@@ -278,14 +272,12 @@ always @(negedge clk) begin
if(timerd_done && ier[ 4]) ipr[ 4] <= 1'b1; // timer_d
// irq by acia ...
if(acia_irqD && !acia_irqD2) begin
if(ier[6]) ipr[6] <= 1'b1;
end
if(acia_irq && ier[6])
ipr[6] <= 1'b1;
// ... and dma
if(dma_irqD && !dma_irqD2) begin
if(ier[7]) ipr[7] <= 1'b1;
end
// ... and dma
if(dma_irq && ier[7])
ipr[7] <= 1'b1;
if(sel && ~ds && ~rw) begin
if(addr == 5'h00) gpip <= din;