247 lines
7.9 KiB
Plaintext
247 lines
7.9 KiB
Plaintext
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PROTOCOL: ALT
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COMPRESSION: NONE
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CONNECT 2400/ARQ
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CBBS(R) 4.0.3b
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09/29/92 00:37:43
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Y/N: want CBBS "1st time user" info?^U
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?^U
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?^U
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?n;ward;christensen;odraw;;fullc;piss
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Logging name to disk...
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You are caller 227428; next msg =45755; 361 active msgs.
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Prev. call 09/27/92 @ 22:28, next msg was 45752
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Recording logon for next time.
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Use FULL? to check assignments
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?^U
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?xxxxx
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"Mine" command checking for msgs TO you, ^K t
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>Function:?dir c:log;dir c:killed;dir summary;type-10 log,ward c;or;*;short
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LOG. 11
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KILLED. 204
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SUMMARY. 24
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09/27/92,22:28:59,227409,2,WARD CHRISTENSEN,,4
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09/27/92,23:51:08,227410,2,DAVID JOHNSON,,1
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09/27/92,23:59:59,227411,2,BILL MATTSON,,2
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09/28/92,01:35:16,227412,2,STEVE RYAN,,2
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09/28/92,04:08:53,227413,9,NORB DEMBINSKI,,
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E#45752,20
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]NORB DEMBINSKI,
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09/28/92,05:08:00,227414,2,JERRY OLSEN,,61
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09/28/92,10:11:56,227415,2,PETE JONES,,2
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09/28/92,10:54:07,227416,1,ROY LIPSCOMB,,
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E#45753,
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E#45754,2
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09/28/92,11:17:08,227417,2,DENNIS STAHL,,5
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09/28/92,13:16:05,227418,2,ROBERT ERWOOD,Chicago/ IL.,13
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09/28/92,15:38:53,227419,2,DENNIS STAHL,,1
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09/28/92,16:16:48,227420,1,PHIL BOLD,winfield,5
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09/28/92,16:59:13,227421,2,TITO JUNCO,SUE/TX,7
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09/28/92,18:36:26,227422,2,WALTER SIDNAR,,10
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09/28/92,20:16:21,227423,2,ALEX ZELL,,
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09/28/92,20:24:59,227424,1,KK KK,kk,1
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09/28/92,20:28:00,227425,1,MICHAEL JENSEN,Chicago,
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09/28/92,20:42:56,227426,2,JESSE JEFFRIES,CHG./ILL,11
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09/28/92,21:29:54,227427,1,JIM EATON,,1
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09/29/92,00:37:46,227428,2,WARD CHRISTENSEN,,
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45752 09/28/92 NORB DEMBINSKI => BENJAMIN COHEN: "R/TELEBIT QBLAZER MODEM"
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45753 09/28/92 ROY LIPSCOMB => ALL: "CRC ALGORITHM?"
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45754 09/28/92 ROY LIPSCOMB => ALL: "QUESTIONS ABOUT DOS 4"
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- End of summary -
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Retrieving flagged msgs: C skips, K aborts.
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Msg 45752 is 08 line(s) on 09/28/92 from NORB DEMBINSKI
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to BENJAMIN COHEN re: R/TELEBIT QBLAZER MODEM
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Thanx for the info. I had used the QBlazer for a trial period and liked
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it very much. I decided to return it because it did not have all the
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features I may want in the future. I had noticed that I could
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trade my old USR HST in for a new model for just a few $ more and
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have the ability to upgrade in the future if things change.
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I appreciate your comments about the QBlazer.
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Norb Dembinski
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Msg 45753 is 01 line(s) on 09/28/92 from ROY LIPSCOMB
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to ALL re: CRC ALGORITHM?
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What is the specific formula or algorithm that produces the CRC of a file?
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Msg 45754 is 06 line(s) on 09/28/92 from ROY LIPSCOMB
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to ALL re: QUESTIONS ABOUT DOS 4
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I don't have a copy of DOS 4, but I need two items of information to
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complete a utility program that displays the DOS errorlevel for DOS 3+:
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1) What is the exact offset (from 0H, not 100H) of the byte in
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DOS 4's COMMAND.COM that holds the current errorlevel?
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2) What are the first three bytes of DOS 4's COMMAND.COM (at 100H)?
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Thanks.
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dup. chars.
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>Function:?
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PROTOCOL: ALT
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COMPRESSION: NONE
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CONNECT 2400/ARQ
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CBBS(R) 4.0.3b
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09/29/92 22:05:41
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Y/N: want CBBS "1st time user" info?^U
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?^U
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?^U
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?n;ward;christensen;odraw;;fullc;piss
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Logging name to disk...
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You are caller 227440; next msg =45759; 365 active msgs.
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Prev. call 09/29/92 @ 00:37, next msg was 45755
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Recording logon for next time.
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Use FULL? to check assignments
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?^U
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?xxxxx
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"Mine" command checking for msgs TO you, ^K t
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>Function:?dir c:log;dir c:killed;dir summary;type-10 log,ward c;or;*;short
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LOG. 12
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KILLED. 204
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SUMMARY. 24
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09/29/92,00:37:46,227428,2,WARD CHRISTENSEN,,
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E#45755,
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E#45756,
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E#45757,
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E#45758,13
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09/29/92,07:52:55,227429,2,DENNIS STAHL,,3
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09/29/92,10:47:47,227430,2,L L,,
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09/29/92,11:07:05,227431,2,ED LANDA,Charlotte/ NC,5
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09/29/92,13:23:49,227432,2,DENNIS STAHL,,0
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09/29/92,15:56:39,227433,2,DENNIS STAHL,,0
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09/29/92,16:45:21,227434,1,LANE LARRISON,,2
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09/29/92,16:51:34,227435,2,MURRAY ARNOW,,3
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09/29/92,20:28:03,227436,2,WALLY KLINGER,park ridge/ ill,4
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09/29/92,20:58:08,227437,2,GREG BLA,,2
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09/29/92,21:05:25,227438,2,JACK LEARY,Glenview IL,4
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09/29/92,21:08:37,227439,2,JACK LEARY,,8
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09/29/92,22:05:44,227440,2,WARD CHRISTENSEN,,
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45755 09/29/92 WARD CHRISTENSEN => ROY LIPSCOMB: "CRC2.C 1 OF 3"
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45756 09/29/92 WARD CHRISTENSEN => ROY LIPSCOMB: "CRC2.C 2 OF 3"
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45757 09/29/92 WARD CHRISTENSEN => ROY LIPSCOMB: "CRC2.C 3 OF 3"
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45758 09/29/92 WARD CHRISTENSEN => ROY LIPSCOMB: "CRC"
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++Invalid number++
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First msg #:?
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>Function:?qr;*
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45755 CRC2.C 1 OF 3
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45756 CRC2.C 2 OF 3
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45757 CRC2.C 3 OF 3
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45758 CRC
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---- End of summary ----
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Retrieving flagged msgs: C skips, K aborts.
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Msg 45755 is 28 line(s) on 09/29/92 from WARD CHRISTENSEN
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to ROY LIPSCOMB re: CRC2.C 1 OF 3
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/* compute crc's */
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/* crc-16 is based on the polynomial x^16+x^15+x^2+1 */
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/* The data is assumed to be fed in from least to most significant bit */
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/* crc-ccitt is based on the polynomial x^16+x^12+x^5+1 */
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/* The data is fed in from most to least significant bit */
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/* The prescription for determining the mask to use for a given polynomial
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is as follows:
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1. Represent the polynomial by a 17-bit number
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2. Assume that the most and least significant bits are 1
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3. Place the right 16 bits into an integer
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4. Bit reverse if serial LSB's are sent first
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*/
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/* Usage : crc2 [filename] */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define M16 0xA001 /* crc-16 mask */
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#define MTT 0x1021 /* crc-ccitt mask */
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/* function declarations */
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unsigned int updcrc(unsigned int,int,unsigned int);
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unsigned int updcrcr(unsigned int,int,unsigned int);
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void perr(char *);
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/* variables */
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char filename[100];
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unsigned int crc16,crctt;
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int ch;
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unsigned long num;
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FILE *fp;
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Msg 45756 is 19 line(s) on 09/29/92 from WARD CHRISTENSEN
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to ROY LIPSCOMB re: CRC2.C 2 OF 3
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/* driver */
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main(argc,argv)
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int argc; char **argv;
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{ if(argc>2) perr("Usage: crc2 [filename]");
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if(argc==2) strcpy(filename,argv[1]);
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else
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{ printf("\nEnter filename: "); gets(filename);
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}
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if((fp=fopen(filename,"rb"))==NULL) perr("Can't open file");
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num=0L; crc16=crctt=0;
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while((ch=fgetc(fp))!=EOF)
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{ num++;
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crc16=updcrcr(crc16,ch,M16);
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crctt=updcrc(crctt,ch,MTT);
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}
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fclose(fp);
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printf("\nNumber of bytes = %lu\nCRC16 = %04X\nCRCTT = %04X",
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num,crc16,crctt);
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}
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Msg 45757 is 28 line(s) on 09/29/92 from WARD CHRISTENSEN
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to ROY LIPSCOMB re: CRC2.C 3 OF 3
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/* update crc */
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unsigned int updcrc(crc,c,mask)
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unsigned int crc,mask; int c;
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{ int i;
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c<<=8;
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for(i=0;i<8;i++)
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{ if((crc ^ c) & 0x8000) crc=(crc<<1)^mask;
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else crc<<=1;
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c<<=1;
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}
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return crc;
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}
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/* update crc reverse */
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unsigned int updcrcr(crc,c,mask)
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unsigned int crc,mask; int c;
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{ int i;
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for(i=0;i<8;i++)
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{ if((crc ^ c) & 1) crc=(crc>>1)^mask;
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else crc>>=1;
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c>>=1;
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}
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return crc;
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}
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/* error abort */
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void perr(s)
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char *s;
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{ printf("\n%s",s); exit(1);
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}
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Msg 45758 is 10 line(s) on 09/29/92 from WARD CHRISTENSEN
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to ROY LIPSCOMB re: CRC
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There's also a "crcfast" that uses a pre-computed table to do the
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CRC. Also there's a CRC routine that uses it on the Ward Board (708)
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849-1132, in one of the low #'d msgs, like msybe 7 or so?
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Basically a CRC is the remainder when a message, treated as a HUGE
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number (128 byte msg = 128 x 8 bits = 1024 bit long NUMBER) divided by
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a polynomial like x^16+x^15+x^2+1. However, it can be computed by shifting
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a bit at a time and doing XORs and other tricks; then others have figured
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how to do it 8-bits at a time (instead of a loop shifting each bit in a
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byte). Actually I don't undersatnd it as well as it may already sound,
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and cannot elaborate on what I've already said.
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>Function:? |