loicloic
111 lines
2.4 KiB
C++
111 lines
2.4 KiB
C++
/*
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www.freedo.org
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The first and only working 3DO multiplayer emulator.
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The FreeDO licensed under modified GNU LGPL, with following notes:
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* The owners and original authors of the FreeDO have full right to develop closed source derivative work.
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* Any non-commercial uses of the FreeDO sources or any knowledge obtained by studying or reverse engineering
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of the sources, or any other material published by FreeDO have to be accompanied with full credits.
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* Any commercial uses of FreeDO sources or any knowledge obtained by studying or reverse engineering of the sources,
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or any other material published by FreeDO is strictly forbidden without owners approval.
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The above notes are taking precedence over GNU LGPL in conflicting situations.
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Project authors:
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Alexander Troosh
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Maxim Grishin
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Allen Wright
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John Sammons
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Felix Lazarev
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*/
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// DiagPort.cpp: implementation of the DiagPort class.
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//
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//////////////////////////////////////////////////////////////////////
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#include "freedoconfig.h"
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#include "DiagPort.h"
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static unsigned short SNDDebugFIFO0;
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static unsigned short SNDDebugFIFO1;
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static unsigned short RCVDebugFIFO0;
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static unsigned short RCVDebugFIFO1;
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static unsigned short GetPTR;
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static unsigned short SendPTR;
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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void __fastcall _diag_Send(unsigned int val)
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{
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if(GetPTR!=16)
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{
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GetPTR=16;
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SendPTR=16;
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SNDDebugFIFO0=0;
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SNDDebugFIFO1=0;
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}
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SNDDebugFIFO0|=(val&1)<<(SendPTR-1);
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SNDDebugFIFO1|=((val&1)>>1)<<(SendPTR-1);
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SendPTR--;
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if(SendPTR==0)
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{
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SendPTR=16;
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}
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}
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unsigned int __fastcall _diag_Get()
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{
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unsigned int val;
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if(SendPTR!=16)
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{
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GetPTR=16;
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SendPTR=16;
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}
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val=0;
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val=((RCVDebugFIFO0>>(GetPTR-1))&0x1);
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val|=((RCVDebugFIFO1>>(GetPTR-1))&0x1)<<0x1;
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GetPTR--;
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/* if(GetPTR>0)
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{
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RCVDebugFIFO0=RCVDebugFIFO0>>1;
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RCVDebugFIFO1=RCVDebugFIFO1>>1;
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GetPTR--;
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val=RCVDebugFIFO0&0x1;
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val|=(RCVDebugFIFO1&0x1)<<0x1;
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}
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*/
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if(GetPTR==0) GetPTR=16;
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return val;
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}
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void _diag_Init(int testcode)
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{
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SNDDebugFIFO0=0;
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SNDDebugFIFO1=0;
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GetPTR=16;
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SendPTR=16;
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if(testcode>=0)
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{
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testcode ^= 0xFF;
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testcode |= 0xA000;
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} else testcode=0;
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RCVDebugFIFO0=testcode;
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RCVDebugFIFO1=testcode;
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}
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