Nortel Networks MSC8101 ADS If Hdds then, If !HDSP then Hdiwr =, Else Hdiwr =, END if Else

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ELSE

HRD_SHIFT.aclr = GND;

END IF;

HRD_SHIFT.shiftin= HRD_HRW;--LOAD SHIFT REGISTER HRD_HRWd= HRD_SHIFT.shiftout;--READ SHIFT REGISTER

--HDI_WR = (((!HDDS and !HRD_HRW) or (HDDS and HRD_HRWd)) and HDSP) or

--(!((!HDDS and !HRD_HRW) or (HDDS and HRD_HRWd)) and !HDSP); --ASSIGN HOST-Write NODE

--HDI_WR = ~(HCS1 * HCS2) * (HDDS ? (HDSP ^ HRD_HRW) : ~HRD_HRW)

IF (HDDS) THEN	-- Double Strobe Mode
IF (!HDSP) THEN	HDI_WR =	!(!HRD_HRW & !(HCS1 & HCS2)); -- Negative Strobe
ELSE	HDI_WR =	!(HRD_HRW & !(HCS1 & HCS2)); -- Positive Strobe
END IF;
ELSE	-- Single Strobe Mode
	HDI_WR =	!(HRD_HRW & !(HCS1 & HCS2));
END IF;
-- HDI_WR = !(!HRD_HRW & !(HCS1 & HCS2));
%**********************************************************************
BCSR’S READS AND WRITES
*						*
**						**
***						***
**********************************************************************%
-- WritetoBcsr = LCELL (!CS1~ & !PSDVAL~ & W_R~);
WritetoBcsr = LCELL (!CS1~ & W_R~);
!Bcsr0Write~ = (WritetoBcsr		& !A27 & !A28 & !A29 );
!Bcsr1Write~ = (WritetoBcsr		& !A27 & !A28 &			A29 );
!Bcsr4Write~ = (WritetoBcsr		& A27 & !A28 & !A29 );
----------------	Service	Misc. Registers			-----------------------------------
!Bcsr5Write~ = (WritetoBcsr		&	A27 & !A28 &		A29 );	-- Address ending ‘0x14’
!Bcsr6Write~ = (WritetoBcsr		&	A27 &	A28 & !A29 );		-- Address ending ‘0x18’
MPC_WRITE_BCSR_0 = (Bcsr0Write~ == BCSR_WRITE_ACTIVE);
MPC_WRITE_BCSR_1 = (Bcsr1Write~ == BCSR_WRITE_ACTIVE);
MPC_WRITE_BCSR_4 = (Bcsr4Write~ == BCSR_WRITE_ACTIVE);
MPC_WRITE_BCSR_5 = (Bcsr5Write~ == BCSR_WRITE_ACTIVE);
MPC_WRITE_BCSR_6 = (Bcsr6Write~ == BCSR_WRITE_ACTIVE);
MPC_READ_BCSR_0	= (!CS1~ &	!W_R~ & !A27 & !A28 & !A29 ); -- Address ending ‘0x0’
MPC_READ_BCSR_1	= (!CS1~ &	!W_R~ & !A27 & !A28 &				A29 ); -- Address ending ‘0x40’
MPC_READ_BCSR_2	= (!CS1~ &	!W_R~ & !A27 & A28 & !A29 ); -- Address ending ‘0x80’
MPC_READ_BCSR_3	= (!CS1~ &	!W_R~ & !A27 & A28 &				A29 ); -- Address ending ‘0x0c’
MPC_READ_BCSR_4	= (!CS1~ &	!W_R~ & A27 & !A28 & !A29 ); -- Address ending ‘0x10’
----------------	Service	Misc. Registers			-----------------------------------
MPC_READ_BCSR_5	= (!CS1~ &	!W_R~ & A27 & !A28 &				A29 ); -- Address ending ‘0x14’
MPC_READ_BCSR_6	= (!CS1~ &	!W_R~ &		A27 &	A28 & !A29 ); -- Address ending ‘0x18’
%
*************************
** BCSR0 Write Operation **
*************************
%
IF (RESETi) THEN
Bcsr0[].d = BCSR0_PON_DEF[];				--Load default values in Reset
ELSIF (MPC_WRITE_BCSR_0) THEN
Bcsr0[0..SIZE0].d = D[0..SIZE0]; --Read the Data Bus
ELSE
Bcsr0[].d = Bcsr0[].q;				--Remember last values

MOTOROLA MSC8101ADS RevB User’s ManualC-111

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