Nortel Networks MSC8101 ADS Network Card User Manual


 
MOTOROLA MSC8101ADS RevB User’s Manual C-111
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
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cale Semiconductor,
I
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