Add an interrupt ack, so that interrupts are cleared automatically. This fixes APOCAL...

[fpgaboy.git] / Interrupt.v

diff --git a/Interrupt.v b/Interrupt.v
index 26861462d1d1dc07bf5038aacee714b282667b9e..201c328979d64f8abd8908e8e64c9c4974669102 100644 (file)
--- a/Interrupt.v
+++ b/Interrupt.v
@@ -13,6 +13,7 @@ module Interrupt(
        input serial,
        input buttons,
        output master,
+       input ack,
        output [7:0] jaddr);
 
        wire [7:0] iflag = {3'b0,buttons,serial,tovf,lcdc,vblank};
@@ -45,7 +46,14 @@ module Interrupt(
                        `ADDR_IE : begin imask <= data; ihold <= ihold | iflag; end
                        endcase
                        
-               end
+               end else if (ack)
+                       ihold <= ihold &
+                               (imasked[0] ? 8'b11111110 :
+                                imasked[1] ? 8'b11111101 :
+                                imasked[2] ? 8'b11111011 :
+                                imasked[3] ? 8'b11110111 :
+                                imasked[4] ? 8'b11101111 :
+                                8'b11111111);
                else
                        ihold <= ihold | iflag;
                rdlatch <= rd;