AM79C90JCTR AMD [Advanced Micro Devices], AM79C90JCTR Datasheet - Page 50
![no-image](/images/no-image-200.jpg)
AM79C90JCTR
Manufacturer Part Number
AM79C90JCTR
Description
CMOS Local Area Network Controller for Ethernet (C-LANCE)
Manufacturer
AMD [Advanced Micro Devices]
Datasheet
1.AM79C90JCTR.pdf
(62 pages)
- Current page: 50 of 62
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AMD
PRINT “ENTER ETHERNET ADDRESS AS 6 HEXADECIMAL NUMBERS SEPARATED ”
PRINT “BY BLANKS. EACH NUMBER REPRESENTS ONE BYTE. THE LEAST ”
PRINT “SIGNIFICANT BIT OF THE FIRST BYTE IS THE FIRST BIT TRANSMITTED.”
PRINT “”
PRINT “ENTER ETHERNET ADDRESS”;
INPUT A$(0), A$(1), A$(2), A$(3), A$(4), A$(5)
REM
REM UNPACK ETHERNET ADDRESS INTO ADDRESS ARRAY
REM
M=0
FOR I = 0 TO 47: A(I) = 0: NEXT I
FOR I = 0 TO 5
IF LEN(A$(I)) = 1 THEN A$(I) = “0” + A$(I)
A$(I) = UCASE$(A$(I))
FOR N = 2 TO 1 STEP –1
Y$ = MID$(A$(I), N, 1)
IF Y$ = “0” THEN 510
IF Y$ = “1” THEN A(M) = 1: GOTO 510
IF Y$ = “2” THEN A(M + 1) = 1: GOTO 510
IF Y$ = “3” THEN A(M + 1) = 1: A(M) = 1: GOTO 510
IF Y$ = “4” THEN A(M + 2) = 1: GOTO 510
IF Y$ = “5” THEN A(M + 2) = 1: A(M) = 1: GOTO 510
IF Y$ = “6” THEN A(M + 2) = 1: A(M + 1) = 1: GOTO 510
IF Y$ = “7” THEN A(M + 2) = 1: A(M + 1) = 1: A(M) = 1: GOTO 510
A(M + 3) = 1
IF Y$ = “8” THEN 510
IF Y$ = “9” THEN A(M) = 1: GOTO 510
IF Y$ = “A” THEN A(M + 1) = 1: GOTO 510
IF Y$ = “B” THEN A(M + 1) = 1: A(M) = 1: GOTO 510
IF Y$ = “C” THEN A(M + 2) = 1: GOTO 510
IF Y$ = “D” THEN A(M + 2) = 1: A(M) = 1: GOTO 510
IF Y$ = “E” THEN A(M + 2) = 1: A(M + 1) = 1: GOTO 510
IF Y$ = “F” THEN A(M + 2) = 1: A(M + 1) = 1: A(M) = 1
M=M+4
NEXT N
NEXT I
REM
REM PERFORM CRC ALGORITHM ON ARRAY A(0–47)
REM
FOR I = 0 TO 31: C(I) = 1: NEXT I
FOR N = 0 TO 47
REM SHIFT CRC REGISTER BY 1
FOR I = 32 TO 1 STEP –1: C(l) = C(I–1): NEXT I
C(0) = 0
T = C(32) XOR A(N): REM T = CONTROL BIT
IF T = 0 THEN 700: REM JUMP IF CONTROL BIT=0
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