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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 |
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