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# On the fly format translation NL to CR/LF
TTTTAAAABBBBLLLLEEEE 5555.... Protocol Checklist
_________________________________________________________________________
|Item XMODEM WXMODEM YMDM-k YMDM-g ZMODEM SKermit|
_|________________________________________|__________________|__________________|__________________|________________|________________|__________________|_
|IIIINNNN SSSSEEEERRRRVVVVIIIICCCCEEEE | 1977 | 1986 | 1982 | 1985 | 1986 | 1985 |
_|____________________|_________|_________|_________|________|________|_________|
|UUUUSSSSEEEERRRR FFFFEEEEAAAATTTTUUUURRRREEEESSSS | | | | | | |
|User Friendly I/F | - | - | - | - | YES | - |
|Commands/batch | 2*N | 2*N | 2 | 2 | 1 | 1(1) |
|Commands/file | 2 | 2 | 0 | 0 | 0 | 0 |
|Command Download | - | - | - | - | YES | YES(6) |
|Menu Compatible | - | - | - | - | YES | - |
|Transfer Recovery | - | - | - | - | YES | - |
|File Management | - | - | - | - | YES | - |
|Security Check | - | - | - | - | YES | - |
|YMODEM Fallback | YES | YES | YES | YES | YES | - |
_|____________________|_________|_________|_________|________|________|_________|
|CCCCOOOOMMMMPPPPAAAATTTTIIIIBBBBIIIILLLLIIIITTTTYYYY | | | | | | |
|Dynamic Files | YES | YES | FFFFAAAAIIIILLLL | FFFFAAAAIIIILLLL | YES | YES |
|Packet SW NETS | - | YES | - | - | YES | YES |
|7 bit PS NETS | - | - | - | - | (8) | YES |
|Old Mainframes | - | - | - | - | (8) | YES |
|CP/M-80 | YES | YES | YES | - | YES(9)| - |
_|____________________|_________|_________|_________|________|________|_________|
|AAAATTTTTTTTRRRRIIIIBBBBUUUUTTTTEEEESSSS | | | | | | |
|Reliability(5) | fair | poor | fair(5)| none | BEST | HIGH |
|Streaming | - | YES | - | YES | YES | YES |
|Overhead(2) | 7% | 7% | 1% | 1% | 1% | 30% |
|Faithful Xfers | - | - | YES | YES | YES | YES |
|Preserve Date | - | - | YES | YES | YES | - |
_|____________________|_________|_________|_________|________|________|_________|
|CCCCOOOOMMMMPPPPLLLLEEEEXXXXIIIITTTTYYYY | | | | | | |
|No-Wait Sample | - | REQD | - | - | opt | REQD |
|Ring Buffers | - | REQD | - | - | opt | REQD |
|XMODEM Similar | YES | LOW | HIGH | HIGH | LOW | NONE |
|Complexity | LOW(5)| MED | LOW(5) | LOW | MED | HIGH |
_|____________________|_________|_________|_________|________|________|_________|
|EEEEXXXXTTTTEEEENNNNSSSSIIIIOOOONNNNSSSS | | | | | | |
|Server Operation | - | - | - | - | YES(4)| YES |
|Multiple Threads | - | - | - | - | future| - |
_|________________________________________|__________________|__________________|__________________|________________|________________|__________________|_
NOTES:
(1) Server mode or Omen Technology Kermit AutoDownload
Chapter 16 Rev 10-27-87 Typeset 10-27-87 39
Chapter 16 ZMODEM Protocol 40
(2) Character count, binary file, transparent channel
(3) 32 bit math needed for accurate transfer (no garbage added)
(4) AutoDownload operation
(5) CCCCyyyybbbbeeeerrrrnnnneeeettttiiiicccc DDDDaaaattttaaaa RRRReeeeccccoooovvvveeeerrrryyyy((((TTTTMMMM)))) improves XMODEM and YMODEM
reliability with complex proprietary logic.
(6) Server commands only
(7) No provision for transfers across time zones
(8) Future enhancement provided for
(9) With Segmented Streaming
WXMODEM: XMODEM derivative protocol with data encoding and windowing