參數(shù)資料
型號(hào)： AM79C90
廠商： Advanced Micro Devices, Inc.
英文描述： CMOS Local Area Network Controller for Ethernet (C-LANCE)
中文描述： 的CMOS局域網(wǎng)控制器（丙應(yīng)聘以太網(wǎng)）
文件頁(yè)數(shù)： 50/62頁(yè)
文件大?。?/td> 437K
代理商： AM79C90
AMD
50
Am79C90
170 PRINT “ENTER ETHERNET ADDRESS AS 6 HEXADECIMAL NUMBERS SEPARATED ”
180 PRINT “BY BLANKS. EACH NUMBER REPRESENTS ONE BYTE. THE LEAST ”
190 PRINT “SIGNIFICANT BIT OF THE FIRST BYTE IS THE FIRST BIT TRANSMITTED.”
200 PRINT “”
210 PRINT “ENTER ETHERNET ADDRESS”;
220 INPUT A$(0), A$(1), A$(2), A$(3), A$(4), A$(5)
240 REM
250 REM UNPACK ETHERNET ADDRESS INTO ADDRESS ARRAY
260 REM
270 M=0
280 FOR I = 0 TO 47: A(I) = 0: NEXT I
290 FOR I = 0 TO 5
300 IF LEN(A$(I)) = 1 THEN A$(I) = “0” + A$(I)
310 A$(I) = UCASE$(A$(I))
320 FOR N = 2 TO 1 STEP –1
330 Y$ = MID$(A$(I), N, 1)
340 IF Y$ = “0” THEN 510
350 IF Y$ = “1” THEN A(M) = 1: GOTO 510
360 IF Y$ = “2” THEN A(M + 1) = 1: GOTO 510
370 IF Y$ = “3” THEN A(M + 1) = 1: A(M) = 1: GOTO 510
380 IF Y$ = “4” THEN A(M + 2) = 1: GOTO 510
390 IF Y$ = “5” THEN A(M + 2) = 1: A(M) = 1: GOTO 510
400 IF Y$ = “6” THEN A(M + 2) = 1: A(M + 1) = 1: GOTO 510
410 IF Y$ = “7” THEN A(M + 2) = 1: A(M + 1) = 1: A(M) = 1: GOTO 510
420 A(M + 3) = 1
430 IF Y$ = “8” THEN 510
440 IF Y$ = “9” THEN A(M) = 1: GOTO 510
450 IF Y$ = “A” THEN A(M + 1) = 1: GOTO 510
460 IF Y$ = “B” THEN A(M + 1) = 1: A(M) = 1: GOTO 510
470 IF Y$ = “C” THEN A(M + 2) = 1: GOTO 510
480 IF Y$ = “D” THEN A(M + 2) = 1: A(M) = 1: GOTO 510
490 IF Y$ = “E” THEN A(M + 2) = 1: A(M + 1) = 1: GOTO 510
500 IF Y$ = “F” THEN A(M + 2) = 1: A(M + 1) = 1: A(M) = 1
510 M=M+4
520 NEXT N
530 NEXT I
540 REM
550 REM PERFORM CRC ALGORITHM ON ARRAY A(0–47)
560 REM
570 FOR I = 0 TO 31: C(I) = 1: NEXT I
580 FOR N = 0 TO 47
590 REM SHIFT CRC REGISTER BY 1
600 FOR I = 32 TO 1 STEP –1: C(l) = C(I–1): NEXT I
610 C(0) = 0
620 T = C(32) XOR A(N): REM T = CONTROL BIT
630 IF T = 0 THEN 700: REM JUMP IF CONTROL BIT=0
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