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47 lines
1.7 KiB
Plaintext
47 lines
1.7 KiB
Plaintext
;
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; File: VMPatches.a
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;
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; Contains: patches related to VM; all of these are currently non-VM versions of VM calls
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;
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; Written by: Darin Adler and Jim Reekes
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;
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; Copyright: © 1990-1991 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <3> 9/10/91 JSM Cleanup header.
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; <2> 12/14/90 dba <JDR> get rid of VMCalls.a; save fewer registers (deferred
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; functions can trash D0-D3/A0-A3, just like interrupt handlers)
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; <1> 10/8/90 JDR First checked in. Patch DeferUserFn when not running VM.
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;
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load 'StandardEqu.d'
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include 'LinkedPatchMacros.a'
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;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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; This is a handy patch that only happens when VM is not running. The Sound Manager needs to call
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; DeferUserFn very often and it seems silly to constantly check if VM is running before making the
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; call. So I thought it would be a good idea to have the trap implemented even when VM isn't.
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; This way you can always make the call and it will immediately call the user function, which is nice.
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NonVMDeferUserFn PatchProc _DeferUserFn,(Plus,SE,II,Portable,IIci,notVM)
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; parameters:
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; a0 = pointer to function to call (no need to defer if there is no VM)
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; d0 = parameter to pass to function (must be in A0 when function is called)
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movem.l d1-d3/a0-a3,-(sp)
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move.l a0,a1 ; move proc. pointer into another register
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move.l d0,a0 ; get parameter into register for proc.
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jsr (a1) ; call proc. with parameter
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movem.l (sp)+,d1-d3/a0-a3
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moveq #noErr,d0 ; return success
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rts
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EndProc
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;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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End
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