79 lines
1.7 KiB
ObjectPascal
79 lines
1.7 KiB
ObjectPascal
{ ************************************************
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* Asuro
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* Unit: Drivers/isr33
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* Description: Keyboard interrupt
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************************************************
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* Author: Aaron Hance
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* Contributors: K Morris
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************************************************ }
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unit isr33;
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interface
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uses
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util,
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console,
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isr_types,
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IDT;
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procedure register();
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procedure hook(hook_method : uint32);
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procedure unhook(hook_method : uint32);
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implementation
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var
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Hooks : Array[1..MAX_HOOKS] of pp_hook_method;
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procedure Main(); interrupt;
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var
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i : integer;
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b : dword;
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begin
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//writechar('!'); // Bug traces all the way back to here - when the keyboard randomly doesn't work, this inturrupt isn't even called...
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// This needs further investigation... Is there something that can go wrong when setting up the PIC?
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b:= inb($60);
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//console.writehexln(b);
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for i:=0 to MAX_HOOKS-1 do begin
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if uint32(Hooks[i]) <> 0 then begin
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Hooks[i](void(b));
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end;
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end;
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outb($20, $20);
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end;
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procedure register();
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begin
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memset(uint32(@Hooks[0]), 0, sizeof(pp_hook_method)*MAX_HOOKS);
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IDT.set_gate(33, uint32(@Main), $08, ISR_RING_0);
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end;
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procedure hook(hook_method : uint32);
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var
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i : uint32;
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begin
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for i:=0 to MAX_HOOKS-1 do begin
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if uint32(Hooks[i]) = hook_method then exit;
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end;
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for i:=0 to MAX_HOOKS-1 do begin
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if uint32(Hooks[i]) = 0 then begin
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Hooks[i]:= pp_hook_method(hook_method);
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exit;
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end;
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end;
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end;
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procedure unhook(hook_method : uint32);
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var
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i : uint32;
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begin
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for i:=0 to MAX_HOOKS-1 do begin
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If uint32(Hooks[i]) = hook_method then Hooks[i]:= nil;
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exit;
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end;
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end;
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end. |