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This document was formatted for Wiki syntax by [[person: | This document was formatted for Wiki syntax by [[person: | ||
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- | Please distribute as widely as possible. | ||
- | Questions to [[http:// | ||
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- | Omen Technology Inc | ||
- | The High Reliability Software | ||
- | 17505-V Sauvie Island Road | ||
- | Portland Oregon 97231 | ||
- | VOICE: 503-621-3406 :VOICE | ||
- | Modem (TeleGodzilla): | ||
- | CompuServe: 70007,2304 | ||
- | GEnie: CAF | ||
- | UUCP: ...!tektronix!reed!omen!caf | ||
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===== Tower of Babel ===== | ===== Tower of Babel ===== | ||
Line 43: | Line 24: | ||
Jeff Garbers (Crosstalk package development director) said it all: "With | Jeff Garbers (Crosstalk package development director) said it all: "With | ||
protocols in the public domain, anyone who wants to dink around with them | protocols in the public domain, anyone who wants to dink around with them | ||
- | can go ahead." | + | can go ahead." |
Documents containing altered examples derived from YMODEM.DOC have added | Documents containing altered examples derived from YMODEM.DOC have added | ||
Line 376: | Line 357: | ||
receiver commands CRC-16. | receiver commands CRC-16. | ||
- | | + | === Figure 1: XMODEM-1k Blocks |
- | | + | |
- | "s -k foo.bar" | + | "s -k foo.bar" |
- | " | + | " |
- | C | + | C |
- | STX 01 FE Data[1024] CRC CRC | + | STX 01 FE Data[1024] CRC CRC |
- | ACK | + | ACK |
- | STX 02 FD Data[1024] CRC CRC | + | STX 02 FD Data[1024] CRC CRC |
- | ACK | + | ACK |
- | STX 03 FC Data[1000] CPMEOF[24] CRC CRC | + | STX 03 FC Data[1000] CPMEOF[24] CRC CRC |
- | ACK | + | ACK |
- | EOT | + | EOT |
- | ACK | + | ACK |
- | | + | === Figure |
- | | + | |
- | "s -k foo.bar" | + | "s -k foo.bar" |
- | " | + | " |
- | C | + | C |
- | STX 01 FE Data[1024] CRC CRC | + | STX 01 FE Data[1024] CRC CRC |
- | ACK | + | ACK |
- | STX 02 FD Data[1024] CRC CRC | + | STX 02 FD Data[1024] CRC CRC |
- | ACK | + | ACK |
- | SOH 03 FC Data[128] CRC CRC | + | SOH 03 FC Data[128] CRC CRC |
- | ACK | + | ACK |
- | SOH 04 FB Data[100] CPMEOF[28] CRC CRC | + | SOH 04 FB Data[100] CPMEOF[28] CRC CRC |
- | ACK | + | ACK |
- | EOT | + | EOT |
- | ACK | + | ACK |
===== YMODEM Batch File Transmission ===== | ===== YMODEM Batch File Transmission ===== | ||
Line 441: | Line 422: | ||
handle oriented MSDOS(TM) functions and C library fopen functions. | handle oriented MSDOS(TM) functions and C library fopen functions. | ||
An assembly language example follows: | An assembly language example follows: | ||
- | | + | |
No spaces are included in the pathname. | No spaces are included in the pathname. | ||
stem (no directory prefix) is transmitted unless the sender has | stem (no directory prefix) is transmitted unless the sender has | ||
Line 537: | Line 518: | ||
RZSZ.ZOO should answer other questions about YMODEM batch protocol. | RZSZ.ZOO should answer other questions about YMODEM batch protocol. | ||
- | | + | === Figure 3: YMODEM Batch Transmission Session |
- | | + | |
- | "sb foo.*< | + | "sb foo.*< |
- | " | + | " |
- | C (command: | + | C (command: |
- | SOH 00 FF foo.c NUL[123] CRC CRC | + | SOH 00 FF foo.c NUL[123] CRC CRC |
- | ACK | + | ACK |
- | C | + | C |
- | SOH 01 FE Data[128] CRC CRC | + | SOH 01 FE Data[128] CRC CRC |
- | ACK | + | ACK |
- | SOH 03 FC Data[128] CRC CRC | + | SOH 03 FC Data[128] CRC CRC |
- | ACK | + | ACK |
- | SOH 04 FB Data[100] CPMEOF[28] CRC CRC | + | SOH 04 FB Data[100] CPMEOF[28] CRC CRC |
- | ACK | + | ACK |
- | EOT | + | EOT |
- | NAK | + | NAK |
- | EOT | + | EOT |
- | ACK | + | ACK |
- | C | + | C |
- | SOH 00 FF NUL[128] CRC CRC | + | SOH 00 FF NUL[128] CRC CRC |
- | ACK | + | ACK |
- | | + | === Figure 4: YMODEM Batch Transmission Session-1k Blocks |
- | | + | |
- | "sb -k foo.*< | + | "sb -k foo.*< |
- | " | + | " |
- | C (command: | + | C (command: |
- | SOH 00 FF foo.c NUL[123] CRC CRC | + | SOH 00 FF foo.c NUL[123] CRC CRC |
- | ACK | + | ACK |
- | C | + | C |
- | STX 02 FD Data[1024] CRC CRC | + | STX 02 FD Data[1024] CRC CRC |
- | ACK | + | ACK |
- | SOH 03 FC Data[128] CRC CRC | + | SOH 03 FC Data[128] CRC CRC |
- | ACK | + | ACK |
- | SOH 04 FB Data[100] CPMEOF[28] CRC CRC | + | SOH 04 FB Data[100] CPMEOF[28] CRC CRC |
- | ACK | + | ACK |
- | EOT | + | EOT |
- | NAK | + | NAK |
- | EOT | + | EOT |
- | ACK | + | ACK |
- | C | + | C |
- | SOH 00 FF NUL[128] CRC CRC | + | SOH 00 FF NUL[128] CRC CRC |
- | ACK | + | ACK |
- | Figure 5. | + | === Figure 5: YMODEM Filename block transmitted by sz === |
+ | < | ||
+ | -rw-r--r-- | ||
- | | + | |
- | + | 10 36333437 20333331 34373432 35313320 | |
- | 00 0100FF62 62637363 6865642E 74787400 | + | 20 31303036 34340000 00000000 00000000 |
- | | + | 30 00000000 00000000 00000000 00000000 |
- | | + | 40 00000000 00000000 00000000 00000000 |
- | | + | 50 00000000 00000000 00000000 00000000 |
- | | + | 60 00000000 00000000 00000000 00000000 |
- | | + | 70 00000000 00000000 00000000 00000000 |
- | | + | 80 000000CA 56 |
- | | + | </ |
- | | + | === Figure 6: YMODEM Header Information and Features |
- | + | ||
- | Figure 6. | + | |
_____________________________________________________________ | _____________________________________________________________ | ||
Line 658: | Line 639: | ||
recovery. | recovery. | ||
- | | + | === Figure 7: YMODEM-g Transmission Session |
- | | + | |
- | "sb foo.*< | + | "sb foo.*< |
- | " | + | " |
- | G (command:rb -g) | + | G (command:rb -g) |
- | SOH 00 FF foo.c NUL[123] CRC CRC | + | SOH 00 FF foo.c NUL[123] CRC CRC |
- | G | + | G |
- | SOH 01 FE Data[128] CRC CRC | + | SOH 01 FE Data[128] CRC CRC |
- | STX 02 FD Data[1024] CRC CRC | + | STX 02 FD Data[1024] CRC CRC |
- | SOH 03 FC Data[128] CRC CRC | + | SOH 03 FC Data[128] CRC CRC |
- | SOH 04 FB Data[100] CPMEOF[28] CRC CRC | + | SOH 04 FB Data[100] CPMEOF[28] CRC CRC |
- | EOT | + | EOT |
- | ACK | + | ACK |
- | G | + | G |
- | SOH 00 FF NUL[128] CRC CRC | + | SOH 00 FF NUL[128] CRC CRC |
Line 691: | Line 672: | ||
<nak> 15H | <nak> 15H | ||
<can> 18H | <can> 18H | ||
- | | + | < |
- | ---- | + | |
- | < | + | |
Line 720: | Line 699: | ||
* The last block sent is no different from others, i.e. there is no "short block" | * The last block sent is no different from others, i.e. there is no "short block" | ||
- | | + | === Figure 8: XMODEM Message Block Level Protocol |
Each block of the transfer looks like: | Each block of the transfer looks like: | ||
Line 790: | Line 769: | ||
getting garbaged. | getting garbaged. | ||
- | | + | === Figure 9: Data flow including Error Recovery |
SENDER | SENDER | ||
Line 856: | Line 835: | ||
protocol. A description of this handshake is presented in section 10. | protocol. A description of this handshake is presented in section 10. | ||
- | | + | === Figure 10: Message Block Level Protocol, CRC mode === |
Each block of the transfer in CRC mode looks like: | Each block of the transfer in CRC mode looks like: | ||
Line 881: | Line 860: | ||
block is the coefficient of X^0 in the message polynomial. | block is the coefficient of X^0 in the message polynomial. | ||
- | Figure 11. | + | ===Figure 11: Example of CRC Calculation written in C === |
+ | |||
+ | The following XMODEM crc routine is taken from " | ||
+ | the source code for these programs (contained in RZSZ.ZOO) for usage. | ||
+ | fast table driven version is also included in this file. | ||
- | The following XMODEM crc routine is taken from " | ||
- | the source code for these programs (contained in RZSZ.ZOO) for usage. | ||
- | fast table driven version is also included in this file. | ||
< | < | ||
/* update CRC */ | /* update CRC */ | ||
Line 974: | Line 954: | ||
represents the checksum byte. | represents the checksum byte. | ||
- | | + | === Figure 12: Data Flow: Receiver has CRC Option, Sender Doesn' |
SENDER | SENDER | ||
Line 1006: | Line 986: | ||
2 CRC bytes. | 2 CRC bytes. | ||
- | Figure 13. | + | === Figure 13: Receiver and Sender Both have CRC Option |
SENDER | SENDER | ||
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implement XMODEM, YMODEM, and ZMODEM with state of the art features and | implement XMODEM, YMODEM, and ZMODEM with state of the art features and | ||
reliability. | reliability. | ||
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- | LIST OF FIGURES | ||
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- | Figure 10. Message Block Level Protocol, CRC mode.................... | ||
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- | Figure 11. Example of CRC Calculation written in C................... | ||
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- | Figure 12. Data Flow: Receiver has CRC Option, Sender Doesn' | ||
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- | Figure 13. Receiver and Sender Both have CRC Option.................. | ||
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===== See Also ===== | ===== See Also ===== |