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MacBinary II, inited, Sun Oct 13 23:59:48 1991, modified Sun Oct 13 23:59:48 1991, creator SimpleText, type ASCII, 12678 bytes "HangUp.doc" , at 0x3206 490 bytes resource
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id metadata key value macFileType [ TEXT] macFileCreator [ ttxt]
hex view +--------+-------------------------+-------------------------+--------+--------+ |00000000| 00 0a 48 61 6e 67 55 70 | 2e 64 6f 63 00 00 00 00 |..HangUp|.doc....| |00000010| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00000020| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00000030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00000040| 00 54 45 58 54 74 74 78 | 74 01 00 00 00 00 00 00 |.TEXTttx|t.......| |00000050| 00 00 00 00 00 31 86 00 | 00 01 ea a5 1e c6 b4 a5 |.....1..|........| |00000060| 1e c6 b4 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00000070| 00 00 00 00 00 00 00 00 | 00 00 81 81 2a f8 00 00 |........|....*...| |00000080| 48 61 6e 67 55 70 0d 43 | 6f 70 79 72 69 67 68 74 |HangUp.C|opyright| |00000090| 20 a9 20 31 39 39 31 20 | 62 79 20 42 6f 62 20 42 | . 1991 |by Bob B| |000000a0| 6c 61 79 6c 6f 63 6b 0d | 0d 20 20 54 68 65 73 65 |laylock.|. 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With |protocol| |00000d40| 73 20 6c 69 6b 65 20 4d | 4e 50 35 20 61 6e 64 20 |s like M|NP5 and | |00000d50| 56 2e 34 32 62 69 73 2c | 20 6d 61 6e 79 20 6e 65 |V.42bis,| many ne| |00000d60| 77 65 72 20 6d 6f 64 65 | 6d 73 20 72 65 71 75 69 |wer mode|ms requi| |00000d70| 72 65 20 73 6f 6d 65 20 | 66 6f 72 6d 20 6f 66 20 |re some |form of | |00000d80| 66 6c 6f 77 20 63 6f 6e | 74 72 6f 6c 20 62 65 74 |flow con|trol bet| |00000d90| 77 65 65 6e 20 74 68 65 | 6d 73 65 6c 76 65 73 20 |ween the|mselves | |00000da0| 61 6e 64 20 74 68 65 20 | 63 6f 6d 70 75 74 65 72 |and the |computer| |00000db0| 73 20 74 6f 20 77 68 69 | 63 68 20 74 68 65 79 20 |s to whi|ch they | |00000dc0| 61 72 65 20 61 74 74 61 | 63 68 65 64 2c 20 69 6e |are atta|ched, in| |00000dd0| 20 6f 72 64 65 72 20 74 | 6f 20 70 72 65 76 65 6e | order t|o preven| |00000de0| 74 20 74 68 65 20 63 6f | 6d 70 75 74 65 72 20 66 |t the co|mputer f| |00000df0| 72 6f 6d 20 74 72 79 69 | 6e 67 20 74 6f 20 73 65 |rom tryi|ng to se| |00000e00| 6e 64 20 64 61 74 61 20 | 6f 75 74 20 74 68 65 20 |nd data |out the | |00000e10| 6d 6f 64 65 6d 20 66 61 | 73 74 65 72 20 74 68 61 |modem fa|ster tha| |00000e20| 6e 20 74 68 65 20 6d 6f | 64 65 6d 20 63 61 6e 20 |n the mo|dem can | |00000e30| 73 65 6e 64 20 69 74 2c | 20 6f 72 20 74 6f 20 70 |send it,| or to p| |00000e40| 72 65 76 65 6e 74 20 74 | 68 65 20 6d 6f 64 65 6d |revent t|he modem| |00000e50| 20 66 72 6f 6d 20 73 65 | 6e 64 69 6e 67 20 64 61 | from se|nding da| |00000e60| 74 61 20 74 6f 20 74 68 | 65 20 63 6f 6d 70 75 74 |ta to th|e comput| |00000e70| 65 72 20 66 61 73 74 65 | 72 20 74 68 61 6e 20 74 |er faste|r than t| |00000e80| 68 65 20 63 6f 6d 70 75 | 74 65 72 20 63 61 6e 20 |he compu|ter can | |00000e90| 70 72 6f 63 65 73 73 20 | 69 74 2e 20 20 54 68 69 |process |it. Thi| |00000ea0| 73 20 69 73 20 75 73 75 | 61 6c 6c 79 20 64 6f 6e |s is usu|ally don| |00000eb0| 65 20 62 79 20 68 61 72 | 64 77 61 72 65 20 68 61 |e by har|dware ha| |00000ec0| 6e 64 73 68 61 6b 69 6e | 67 2e 0d 0d 20 20 49 6e |ndshakin|g... In| |00000ed0| 20 74 68 65 20 63 6f 6e | 74 65 78 74 20 6f 66 20 | the con|text of | |00000ee0| 61 20 4d 61 63 69 6e 74 | 6f 73 68 2c 20 74 68 69 |a Macint|osh, thi| |00000ef0| 73 20 6d 65 61 6e 73 20 | 75 73 69 6e 67 20 74 68 |s means |using th| |00000f00| 65 20 48 53 4b 69 20 61 | 6e 64 20 48 53 4b 6f 20 |e HSKi a|nd HSKo | |00000f10| 6c 69 6e 65 73 20 74 6f | 20 70 65 72 66 6f 72 6d |lines to| perform| |00000f20| 20 74 68 69 73 20 68 61 | 6e 64 73 68 61 6b 69 6e | this ha|ndshakin| |00000f30| 67 2c 20 77 68 69 63 68 | 20 69 73 20 66 69 6e 65 |g, which| is fine| |00000f40| 2c 20 65 78 63 65 70 74 | 20 74 68 61 74 20 69 74 |, except| that it| |00000f50| 20 6c 65 61 76 65 73 20 | 6e 6f 20 65 78 74 72 61 | leaves |no extra| |00000f60| 20 6c 69 6e 65 20 66 6f | 72 20 74 68 65 20 4d 61 | line fo|r the Ma| |00000f70| 63 69 6e 74 6f 73 68 20 | 74 6f 20 75 73 65 20 74 |cintosh |to use t| |00000f80| 6f 20 64 72 6f 70 20 74 | 68 65 20 44 54 52 20 6f |o drop t|he DTR o| |00000f90| 6e 20 74 68 65 20 6d 6f | 64 65 6d 20 74 6f 20 68 |n the mo|dem to h| |00000fa0| 61 6e 67 20 75 70 2e 0d | 0d 20 20 41 73 20 69 74 |ang up..|. As it| |00000fb0| 20 74 75 72 6e 73 20 6f | 75 74 2c 20 74 68 65 20 | turns o|ut, the | |00000fc0| 52 54 53 20 6c 69 6e 65 | 20 66 72 6f 6d 20 74 68 |RTS line| from th| |00000fd0| 65 20 38 35 33 30 20 69 | 73 20 75 73 65 64 20 74 |e 8530 i|s used t| |00000fe0| 6f 20 74 72 69 73 74 61 | 74 65 20 74 68 65 20 54 |o trista|te the T| |00000ff0| 78 44 2b 20 61 6e 64 20 | 54 78 44 2d 20 6c 69 6e |xD+ and |TxD- lin| |00001000| 65 73 20 6f 6e 20 74 68 | 65 20 4d 61 63 69 6e 74 |es on th|e Macint| |00001010| 6f 73 68 20 73 65 72 69 | 61 6c 20 70 6f 72 74 73 |osh seri|al ports| |00001020| 2e 20 20 57 68 65 6e 20 | 52 54 53 20 69 73 20 68 |. When |RTS is h| |00001030| 69 67 68 2c 20 54 78 44 | 2b 20 61 6e 64 20 54 78 |igh, TxD|+ and Tx| |00001040| 44 2d 20 64 69 73 70 6c | 61 79 20 6f 70 70 6f 73 |D- displ|ay oppos| |00001050| 69 74 65 20 76 6f 6c 74 | 61 67 65 20 6c 65 76 65 |ite volt|age leve| |00001060| 6c 73 2c 20 64 65 70 65 | 6e 64 69 6e 67 20 6f 6e |ls, depe|nding on| |00001070| 20 74 68 65 20 73 74 61 | 74 65 20 6f 66 20 74 68 | the sta|te of th| |00001080| 65 20 54 78 44 20 6f 75 | 74 70 75 74 20 6f 6e 20 |e TxD ou|tput on | |00001090| 74 68 65 20 38 35 33 30 | 2e 20 20 57 68 65 6e 20 |the 8530|. When | |000010a0| 52 54 53 20 69 73 20 6c | 6f 77 2c 20 54 78 44 2b |RTS is l|ow, TxD+| |000010b0| 20 61 6e 64 20 54 78 44 | 2d 20 61 72 65 20 69 6e | and TxD|- are in| |000010c0| 20 74 68 65 20 6f 70 65 | 6e 20 73 74 61 74 65 3b | the ope|n state;| |000010d0| 20 70 72 6f 76 69 64 69 | 6e 67 20 6e 6f 20 76 6f | providi|ng no vo| |000010e0| 6c 74 61 67 65 2c 20 61 | 6e 64 20 61 20 68 69 67 |ltage, a|nd a hig| |000010f0| 68 20 69 6d 70 65 64 61 | 6e 63 65 2e 0d 0d 20 20 |h impeda|nce... | |00001100| 54 68 65 20 48 61 6e 67 | 55 70 20 52 43 4d 44 20 |The Hang|Up RCMD | |00001110| 28 66 6f 72 20 75 73 65 | 20 69 6e 20 57 68 69 74 |(for use| in Whit| |00001120| 65 20 4b 6e 69 67 68 74 | 29 20 61 6e 64 20 74 68 |e Knight|) and th| |00001130| 65 20 76 61 72 69 6f 75 | 73 20 48 61 6e 67 55 70 |e variou|s HangUp| |00001140| 20 46 4b 45 59 73 20 63 | 61 75 73 65 20 74 68 65 | FKEYs c|ause the| |00001150| 20 52 54 53 20 6f 75 74 | 70 75 74 20 6f 66 20 74 | RTS out|put of t| |00001160| 68 65 20 38 35 33 30 20 | 74 6f 20 62 65 20 64 72 |he 8530 |to be dr| |00001170| 6f 70 70 65 64 20 66 6f | 72 20 6f 6e 65 20 73 65 |opped fo|r one se| |00001180| 63 6f 6e 64 2c 20 74 68 | 65 6e 20 72 61 69 73 65 |cond, th|en raise| |00001190| 64 20 61 67 61 69 6e 2e | 20 20 57 69 74 68 20 61 |d again.| With a| |000011a0| 20 73 70 65 63 69 61 6c | 6c 79 2d 77 69 72 65 64 | special|ly-wired| |000011b0| 20 63 61 62 6c 65 20 28 | 77 68 69 63 68 20 77 69 | cable (|which wi| |000011c0| 6c 6c 20 62 65 20 64 65 | 73 63 72 69 62 65 64 20 |ll be de|scribed | |000011d0| 73 68 6f 72 74 6c 79 29 | 2c 20 74 68 65 20 68 69 |shortly)|, the hi| |000011e0| 67 68 2d 69 6d 70 65 64 | 61 6e 63 65 20 73 74 61 |gh-imped|ance sta| |000011f0| 74 65 20 6f 66 20 74 68 | 65 20 54 78 44 2b 20 61 |te of th|e TxD+ a| |00001200| 6e 64 20 54 78 44 2d 20 | 6c 69 6e 65 73 20 77 69 |nd TxD- |lines wi| |00001210| 6c 6c 20 72 65 73 75 6c | 74 20 69 6e 20 61 20 6c |ll resul|t in a l| |00001220| 6f 77 20 73 74 61 74 65 | 20 62 65 69 6e 67 20 70 |ow state| being p| |00001230| 61 73 73 65 64 20 6d 6f | 6d 65 6e 74 61 72 69 6c |assed mo|mentaril| |00001240| 79 20 74 6f 20 74 68 65 | 20 44 54 52 20 6c 69 6e |y to the| DTR lin| |00001250| 65 20 6f 6e 20 74 68 65 | 20 6d 6f 64 65 6d 2e 0d |e on the| modem..| |00001260| 0d 0d 48 6f 77 20 54 6f | 20 57 69 72 65 20 74 68 |..How To| Wire th| |00001270| 65 20 43 61 62 6c 65 3a | 0d 2d 2d 2d 2d 2d 2d 2d |e Cable:|.-------| |00001280| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 0d |--------|-------.| |00001290| 0d 20 20 46 69 72 73 74 | 2c 20 79 6f 75 20 6e 65 |. First|, you ne| |000012a0| 65 64 20 74 6f 20 66 69 | 6e 64 20 6f 75 74 20 73 |ed to fi|nd out s| |000012b0| 6f 6d 65 74 68 69 6e 67 | 20 61 62 6f 75 74 20 79 |omething| about y| |000012c0| 6f 75 72 20 6d 6f 64 65 | 6d 2e 20 20 42 79 20 63 |our mode|m. By c| |000012d0| 6f 6e 76 65 6e 74 69 6f | 6e 2c 20 74 68 65 20 6d |onventio|n, the m| |000012e0| 6f 64 65 6d 20 73 68 6f | 75 6c 64 20 65 78 70 65 |odem sho|uld expe| |000012f0| 63 74 20 61 20 70 6f 73 | 69 74 69 76 65 20 76 6f |ct a pos|itive vo| |00001300| 6c 74 61 67 65 20 69 6e | 20 74 68 65 20 72 61 6e |ltage in| the ran| |00001310| 67 65 20 2b 35 20 74 6f | 20 2b 31 35 20 76 6f 6c |ge +5 to| +15 vol| |00001320| 74 73 20 6f 6e 20 74 68 | 65 20 44 54 52 20 6c 69 |ts on th|e DTR li| |00001330| 6e 65 20 61 73 20 61 20 | 68 69 67 68 20 73 74 61 |ne as a |high sta| |00001340| 74 65 2c 20 61 6e 64 20 | 61 20 6e 65 67 61 74 69 |te, and |a negati| |00001350| 76 65 20 76 6f 6c 74 61 | 67 65 20 69 6e 20 74 68 |ve volta|ge in th| |00001360| 65 20 72 61 6e 67 65 20 | 2d 35 20 74 6f 20 2d 31 |e range |-5 to -1| |00001370| 35 20 76 6f 6c 74 73 20 | 66 6f 72 20 61 20 6c 6f |5 volts |for a lo| |00001380| 77 20 73 74 61 74 65 2e | 20 20 41 6e 79 74 68 69 |w state.| Anythi| |00001390| 6e 67 20 62 65 74 77 65 | 65 6e 20 2d 35 20 61 6e |ng betwe|en -5 an| |000013a0| 64 20 2b 35 20 76 6f 6c | 74 73 20 69 73 20 73 75 |d +5 vol|ts is su| |000013b0| 70 70 6f 73 65 64 20 74 | 6f 20 62 65 20 75 6e 64 |pposed t|o be und| |000013c0| 65 66 69 6e 65 64 2e 20 | 20 49 6e 20 6f 74 68 65 |efined. | In othe| |000013d0| 72 20 77 6f 72 64 73 2c | 20 69 74 20 69 73 20 6e |r words,| it is n| |000013e0| 6f 74 20 63 6c 65 61 72 | 6c 79 20 64 65 66 69 6e |ot clear|ly defin| |000013f0| 65 64 20 68 6f 77 20 74 | 68 65 20 44 54 52 20 6c |ed how t|he DTR l| |00001400| 69 6e 65 20 73 68 6f 75 | 6c 64 20 72 65 61 64 20 |ine shou|ld read | |00001410| 69 66 20 6e 6f 20 63 6c | 65 61 72 20 76 6f 6c 74 |if no cl|ear volt| |00001420| 61 67 65 20 69 73 20 70 | 72 65 73 65 6e 74 20 6f |age is p|resent o| |00001430| 6e 20 69 74 2e 20 20 57 | 68 61 74 20 79 6f 75 20 |n it. W|hat you | |00001440| 6e 65 65 64 20 74 6f 20 | 66 69 6e 64 20 6f 75 74 |need to |find out| |00001450| 20 69 73 20 77 68 69 63 | 68 20 77 61 79 20 74 68 | is whic|h way th| |00001460| 65 20 44 54 52 20 6c 69 | 6e 65 20 22 66 6c 6f 61 |e DTR li|ne "floa| |00001470| 74 73 22 20 77 68 65 6e | 20 74 68 65 72 65 20 69 |ts" when| there i| |00001480| 73 20 6e 6f 20 73 69 67 | 6e 61 6c 20 74 6f 20 70 |s no sig|nal to p| |00001490| 75 6c 6c 20 69 74 20 6f | 6e 65 20 77 61 79 20 6f |ull it o|ne way o| |000014a0| 72 20 74 68 65 20 6f 74 | 68 65 72 2e 0d 0d 20 20 |r the ot|her... | |000014b0| 44 6f 65 73 20 79 6f 75 | 72 20 6d 6f 64 65 6d 20 |Does you|r modem | |000014c0| 68 61 76 65 20 61 20 6c | 69 67 68 74 20 6f 6e 20 |have a l|ight on | |000014d0| 74 68 65 20 66 72 6f 6e | 74 20 6c 61 62 65 6c 65 |the fron|t labele| |000014e0| 64 20 22 54 52 22 20 6f | 72 20 22 44 54 52 22 3f |d "TR" o|r "DTR"?| |000014f0| 20 20 49 66 20 73 6f 2c | 20 74 68 69 73 20 74 65 | If so,| this te| |00001500| 73 74 20 77 69 6c 6c 20 | 62 65 20 65 61 73 79 2e |st will |be easy.| |00001510| 20 20 69 66 20 6e 6f 74 | 2c 20 69 74 27 6c 6c 20 | if not|, it'll | |00001520| 62 65 20 61 20 62 69 74 | 20 68 61 72 64 65 72 2e |be a bit| harder.| |00001530| 20 20 49 6e 20 61 6e 79 | 20 65 76 65 6e 74 2c 20 | In any| event, | |00001540| 62 65 67 69 6e 20 74 68 | 65 20 74 65 73 74 20 62 |begin th|e test b| |00001550| 79 20 6d 61 6b 69 6e 67 | 20 73 75 72 65 20 74 68 |y making| sure th| |00001560| 61 74 20 74 68 65 20 44 | 54 52 20 6c 69 6e 65 20 |at the D|TR line | |00001570| 6f 6e 20 79 6f 75 72 20 | 6d 6f 64 65 6d 20 69 73 |on your |modem is| |00001580| 20 66 75 6c 6c 79 20 65 | 6e 61 62 6c 65 64 2e 20 | fully e|nabled. | |00001590| 20 4f 6e 20 73 6f 6d 65 | 20 6f 6c 64 65 72 20 6d | On some| older m| |000015a0| 6f 64 65 6d 73 2c 20 74 | 68 69 73 20 69 73 20 61 |odems, t|his is a| |000015b0| 20 44 49 50 20 73 77 69 | 74 63 68 20 73 65 74 74 | DIP swi|tch sett| |000015c0| 69 6e 67 2e 20 20 4f 6e | 20 6d 6f 73 74 20 6e 65 |ing. On| most ne| |000015d0| 77 65 72 20 6d 6f 64 65 | 6d 73 2c 20 74 68 69 73 |wer mode|ms, this| |000015e0| 20 69 73 20 61 63 63 6f | 6d 70 6c 69 73 68 65 64 | is acco|mplished| |000015f0| 20 62 79 20 73 65 6e 64 | 69 6e 67 20 69 74 20 74 | by send|ing it t| |00001600| 68 65 20 63 6f 6d 6d 61 | 6e 64 20 22 41 54 26 44 |he comma|nd "AT&D| |00001610| 32 22 2e 0d 0d 20 20 57 | 69 74 68 20 74 68 65 20 |2"... W|ith the | |00001620| 44 54 52 20 6c 69 6e 65 | 20 66 75 6c 6c 79 20 65 |DTR line| fully e| |00001630| 6e 61 62 6c 65 64 2c 20 | 79 6f 75 72 20 6d 6f 64 |nabled, |your mod| |00001640| 65 6d 20 63 6f 6e 6e 65 | 63 74 65 64 20 62 79 20 |em conne|cted by | |00001650| 61 20 70 72 6f 70 65 72 | 20 63 61 62 6c 65 20 74 |a proper| cable t| |00001660| 6f 20 79 6f 75 72 20 4d | 61 63 69 6e 74 6f 73 68 |o your M|acintosh| |00001670| 2c 20 61 6e 64 20 61 20 | 70 72 6f 70 65 72 6c 79 |, and a |properly| |00001680| 20 73 65 74 2d 75 70 20 | 74 65 72 6d 69 6e 61 6c | set-up |terminal| |00001690| 20 70 72 6f 67 72 61 6d | 20 72 75 6e 6e 69 6e 67 | program| running| |000016a0| 2c 20 74 68 65 20 44 54 | 52 20 6c 69 67 68 74 20 |, the DT|R light | |000016b0| 6f 6e 20 79 6f 75 72 20 | 6d 6f 64 65 6d 2c 20 69 |on your |modem, i| |000016c0| 66 20 70 72 65 73 65 6e | 74 2c 20 73 68 6f 75 6c |f presen|t, shoul| |000016d0| 64 20 62 65 20 6c 69 74 | 2e 20 20 49 66 20 79 6f |d be lit|. If yo| |000016e0| 75 20 68 61 76 65 20 73 | 75 63 68 20 61 20 6c 69 |u have s|uch a li| |000016f0| 67 68 74 20 6f 6e 20 79 | 6f 75 72 20 6d 6f 64 65 |ght on y|our mode| |00001700| 6d 2c 20 64 69 73 63 6f | 6e 6e 65 63 74 20 74 68 |m, disco|nnect th| |00001710| 65 20 63 61 62 6c 65 20 | 28 49 20 6d 65 61 6e 20 |e cable |(I mean | |00001720| 74 68 65 20 63 61 62 6c | 65 20 62 65 74 77 65 65 |the cabl|e betwee| |00001730| 6e 20 74 68 65 20 6d 6f | 64 65 6d 20 61 6e 64 20 |n the mo|dem and | |00001740| 74 68 65 20 63 6f 6d 70 | 75 74 65 72 2c 20 6e 6f |the comp|uter, no| |00001750| 74 20 74 68 65 20 6f 6e | 65 20 74 6f 20 74 68 65 |t the on|e to the| |00001760| 20 70 68 6f 6e 65 20 6c | 69 6e 65 2e 29 20 66 72 | phone l|ine.) fr| |00001770| 6f 6d 20 74 68 65 20 6d | 6f 64 65 6d 2c 20 61 6e |om the m|odem, an| |00001780| 64 20 73 65 65 20 77 68 | 61 74 20 74 68 69 73 20 |d see wh|at this | |00001790| 6c 69 67 68 74 20 64 6f | 65 73 2e 20 20 49 66 20 |light do|es. If | |000017a0| 69 74 20 67 6f 65 73 20 | 6f 75 74 2c 20 74 68 65 |it goes |out, the| |000017b0| 6e 20 79 6f 75 72 20 6d | 6f 64 65 6d 27 73 20 44 |n your m|odem's D| |000017c0| 54 52 20 6c 69 6e 65 20 | 66 6c 6f 61 74 73 20 6c |TR line |floats l| |000017d0| 6f 77 2e 20 20 49 66 20 | 74 68 65 20 6c 69 67 68 |ow. If |the ligh| |000017e0| 74 20 73 74 61 79 73 20 | 6f 6e 2c 20 74 68 65 6e |t stays |on, then| |000017f0| 20 74 68 65 20 44 54 52 | 20 6c 69 6e 65 20 66 6c | the DTR| line fl| |00001800| 6f 61 74 73 20 68 69 67 | 68 2e 0d 0d 20 20 49 66 |oats hig|h... If| |00001810| 20 79 6f 75 20 64 6f 20 | 6e 6f 74 20 68 61 76 65 | you do |not have| |00001820| 20 61 20 44 54 52 20 6c | 69 67 68 74 2c 20 74 68 | a DTR l|ight, th| |00001830| 65 6e 20 79 6f 75 27 6c | 6c 20 68 61 76 65 20 74 |en you'l|l have t| |00001840| 6f 20 74 72 79 20 61 20 | 6d 6f 72 65 20 63 6f 6d |o try a |more com| |00001850| 70 6c 69 63 61 74 65 64 | 20 65 78 70 65 72 69 65 |plicated| experie| |00001860| 6d 65 6e 74 2e 20 20 44 | 69 61 6c 20 6f 75 74 20 |ment. D|ial out | |00001870| 74 6f 20 73 6f 6d 65 20 | 42 42 53 20 6f 72 20 73 |to some |BBS or s| |00001880| 6f 6d 65 20 6f 74 68 65 | 72 20 6d 6f 64 65 6d 2c |ome othe|r modem,| |00001890| 20 77 68 69 63 68 20 77 | 6f 6e 27 74 20 62 65 20 | which w|on't be | |000018a0| 74 65 72 72 69 62 6c 79 | 20 73 63 72 65 77 65 64 |terribly| screwed| |000018b0| 20 69 66 20 79 6f 75 20 | 68 61 6e 67 20 75 70 20 | if you |hang up | |000018c0| 73 75 64 64 65 6e 6c 79 | 2e 20 20 41 66 74 65 72 |suddenly|. After| |000018d0| 20 79 6f 75 72 20 6d 6f | 64 65 6d 20 68 61 73 20 | your mo|dem has | |000018e0| 65 73 74 61 62 6c 69 73 | 68 65 64 20 61 20 63 6f |establis|hed a co| |000018f0| 6e 6e 65 63 74 69 6f 6e | 20 77 69 74 68 20 74 68 |nnection| with th| |00001900| 65 20 6f 74 68 65 72 2c | 20 64 69 73 63 6f 6e 6e |e other,| disconn| |00001910| 65 63 74 20 79 6f 75 72 | 20 6d 6f 64 65 6d 20 63 |ect your| modem c| |00001920| 61 62 6c 65 2e 20 20 28 | 41 67 61 69 6e 2c 20 49 |able. (|Again, I| |00001930| 20 6d 65 61 6e 20 74 68 | 65 20 63 61 62 6c 65 20 | mean th|e cable | |00001940| 62 65 74 77 65 65 6e 20 | 74 68 65 20 6d 6f 64 65 |between |the mode| |00001950| 6d 20 61 6e 64 20 74 68 | 65 20 63 6f 6d 70 75 74 |m and th|e comput| |00001960| 65 72 2c 20 6e 6f 74 20 | 74 68 65 20 6f 6e 65 20 |er, not |the one | |00001970| 74 6f 20 74 68 65 20 70 | 68 6f 6e 65 20 6c 69 6e |to the p|hone lin| |00001980| 65 2e 29 20 20 49 66 20 | 79 6f 75 72 20 6d 6f 64 |e.) If |your mod| |00001990| 65 6d 20 68 61 6e 67 73 | 20 75 70 2c 20 74 68 65 |em hangs| up, the| |000019a0| 6e 20 74 68 65 20 44 54 | 52 20 6c 69 6e 65 20 66 |n the DT|R line f| |000019b0| 6c 6f 61 74 73 20 6c 6f | 77 2e 20 20 49 66 20 69 |loats lo|w. If i| |000019c0| 74 20 64 6f 65 73 20 6e | 6f 74 20 68 61 6e 67 20 |t does n|ot hang | |000019d0| 75 70 2c 20 74 68 65 6e | 20 74 68 65 20 44 54 52 |up, then| the DTR| |000019e0| 20 66 6c 6f 61 74 73 20 | 68 69 67 68 2e 0d 0d 20 | floats |high... | |000019f0| 20 4f 4b 2c 20 6e 6f 77 | 20 74 68 61 74 20 79 6f | OK, now| that yo| |00001a00| 75 20 6b 6e 6f 77 20 77 | 68 69 63 68 20 77 61 79 |u know w|hich way| |00001a10| 74 68 65 20 44 54 52 20 | 6c 69 6e 65 20 6f 6e 20 |the DTR |line on | |00001a20| 79 6f 75 72 20 6d 6f 64 | 65 6d 20 66 6c 6f 61 74 |your mod|em float| |00001a30| 73 2c 20 77 65 27 72 65 | 20 72 65 61 64 79 20 74 |s, we're| ready t| |00001a40| 6f 20 73 74 61 72 74 20 | 77 69 72 69 6e 67 20 74 |o start |wiring t| |00001a50| 68 65 20 63 61 62 6c 65 | 2e 20 20 46 69 72 73 74 |he cable|. First| |00001a60| 2c 20 49 27 6c 6c 20 6c | 69 73 74 20 74 68 65 20 |, I'll l|ist the | |00001a70| 65 61 73 79 20 63 6f 6e | 6e 65 63 74 69 6f 6e 73 |easy con|nections| |00001a80| 2e 2e 2e 0d 0d 20 20 44 | 49 4e 2d 38 20 28 4d 61 |..... D|IN-8 (Ma| |00001a90| 63 69 6e 74 6f 73 68 29 | 20 20 44 42 2d 32 35 20 |cintosh)| DB-25 | |00001aa0| 28 4d 6f 64 65 6d 29 0d | 20 20 48 53 4b 6f 20 20 |(Modem).| HSKo | |00001ab0| 31 20 20 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |1 -----|--------| |00001ac0| 3e 20 20 34 20 20 52 54 | 53 0d 20 20 48 53 4b 69 |> 4 RT|S. HSKi| |00001ad0| 20 20 32 20 20 3c 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d | 2 <--|--------| |00001ae0| 2d 2d 2d 20 20 35 20 20 | 43 54 53 0d 20 20 54 78 |--- 5 |CTS. Tx| |00001af0| 44 2d 20 20 33 20 20 2d | 2d 2d 2d 2d 2d 2d 2d 2d |D- 3 -|--------| |00001b00| 2d 2d 2d 2d 3e 20 20 32 | 20 20 54 78 44 0d 20 20 |----> 2| TxD. | |00001b10| 47 6e 64 20 20 20 34 20 | 20 2d 2d 2d 2d 2d 2d 2d |Gnd 4 | -------| |00001b20| 2d 2d 2d 2d 2d 2d 2d 20 | 20 37 20 20 47 6e 64 0d |------- | 7 Gnd.| |00001b30| 20 20 52 78 44 2d 20 20 | 35 20 20 3c 2d 2d 2d 2d | RxD- |5 <----| |00001b40| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 20 20 33 20 20 52 78 |--------|- 3 Rx| |00001b50| 44 0d 20 20 54 78 44 2b | 20 20 36 20 20 4e 6f 74 |D. TxD+| 6 Not| |00001b60| 20 43 6f 6e 6e 65 63 74 | 65 64 20 28 59 65 74 29 | Connect|ed (Yet)| |00001b70| 0d 20 20 47 50 69 20 20 | 20 37 20 20 3c 2d 2d 2d |. GPi | 7 <---| |00001b80| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 20 20 38 20 20 44 |--------|-- 8 D| |00001b90| 43 44 0d 20 20 52 78 44 | 2b 20 20 38 20 20 28 43 |CD. 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If yo|ur modem| |000020a0| 27 73 20 44 54 52 20 69 | 6e 70 75 74 20 66 6c 6f |'s DTR i|nput flo| |000020b0| 61 74 73 20 68 69 67 68 | 2c 20 74 68 65 6e 20 79 |ats high|, then y| |000020c0| 6f 75 27 6c 6c 20 6e 65 | 65 64 20 74 6f 20 64 6f |ou'll ne|ed to do| |000020d0| 20 61 20 62 69 74 20 6d | 6f 72 65 2e 20 20 41 6c | a bit m|ore. Al| |000020e0| 61 73 2c 20 74 68 69 73 | 20 63 61 6e 20 67 65 74 |as, this| can get| |000020f0| 20 61 77 6b 61 72 64 2e | 20 20 57 68 61 74 20 79 | awkard.| What y| |00002100| 6f 75 20 6e 65 65 64 20 | 69 6e 20 74 68 69 73 20 |ou need |in this | |00002110| 63 61 73 65 20 69 73 20 | 74 6f 20 70 72 6f 76 69 |case is |to provi| |00002120| 64 65 20 61 20 6e 65 67 | 61 74 69 76 65 20 76 6f |de a neg|ative vo| |00002130| 6c 74 61 67 65 2c 20 74 | 68 72 6f 75 67 68 20 61 |ltage, t|hrough a| |00002140| 20 72 65 73 69 73 74 6f | 72 2c 20 74 6f 20 70 75 | resisto|r, to pu| |00002150| 6c 6c 20 74 68 65 20 44 | 54 52 20 6c 69 6e 65 20 |ll the D|TR line | |00002160| 64 6f 77 6e 20 77 68 65 | 6e 20 74 68 65 20 76 6f |down whe|n the vo| |00002170| 6c 74 61 67 65 20 66 72 | 6f 6d 20 74 68 65 20 54 |ltage fr|om the T| |00002180| 78 44 20 6c 69 6e 65 73 | 2c 20 76 69 61 20 74 68 |xD lines|, via th| |00002190| 65 20 64 69 6f 64 65 73 | 2c 20 69 73 20 72 65 6d |e diodes|, is rem| |000021a0| 6f 76 65 64 2e 20 20 41 | 6c 61 73 2c 20 6e 6f 20 |oved. A|las, no | |000021b0| 73 75 63 68 20 6c 6f 77 | 20 76 6f 6c 74 61 67 65 |such low| voltage| |000021c0| 20 69 73 20 61 76 61 69 | 6c 61 62 6c 65 20 6f 6e | is avai|lable on| |000021d0| 20 74 68 65 20 4d 61 63 | 69 6e 74 6f 73 68 27 73 | the Mac|intosh's| |000021e0| 20 70 6f 72 74 2c 20 6e | 6f 72 20 6f 6e 20 6d 6f | port, n|or on mo| |000021f0| 73 74 20 6d 6f 64 65 6d | 73 2c 20 61 73 20 66 61 |st modem|s, as fa| |00002200| 72 20 61 73 20 49 20 6b | 6e 6f 77 2e 20 20 49 66 |r as I k|now. If| |00002210| 20 79 6f 75 72 20 6d 6f | 64 65 6d 20 68 61 73 20 | your mo|dem has | |00002220| 61 20 70 69 6e 20 6f 6e | 20 69 74 20 77 68 69 63 |a pin on| it whic| |00002230| 68 20 63 61 6e 20 62 65 | 20 63 6f 75 6e 74 65 64 |h can be| counted| |00002240| 20 6f 6e 20 74 6f 20 68 | 61 76 65 20 61 20 73 75 | on to h|ave a su| |00002250| 66 66 69 63 69 65 6e 74 | 20 6e 65 67 61 74 69 76 |fficient| negativ| |00002260| 65 20 76 6f 6c 74 61 67 | 65 2c 20 74 68 65 6e 20 |e voltag|e, then | |00002270| 74 68 69 73 20 77 69 6c | 6c 20 6d 61 6b 65 20 74 |this wil|l make t| |00002280| 68 69 6e 67 73 20 65 61 | 73 69 65 72 2e 20 20 28 |hings ea|sier. (| |00002290| 41 20 66 65 77 20 68 6f | 75 72 73 20 61 66 74 65 |A few ho|urs afte| |000022a0| 72 20 69 6e 69 74 69 61 | 6c 6c 79 20 77 72 69 74 |r initia|lly writ| |000022b0| 69 6e 67 20 74 68 69 73 | 20 70 61 72 61 67 72 61 |ing this| paragra| |000022c0| 70 68 2c 20 69 74 20 6f | 63 63 75 72 73 20 74 6f |ph, it o|ccurs to| |000022d0| 20 6d 65 20 74 68 61 74 | 20 49 20 74 68 69 6e 6b | me that| I think| |000022e0| 20 6d 6f 73 74 20 6d 6f | 64 65 6d 73 20 68 61 76 | most mo|dems hav| |000022f0| 65 20 61 20 52 69 6e 67 | 20 49 6e 64 69 63 61 74 |e a Ring| Indicat| |00002300| 6f 72 20 73 69 67 6e 61 | 6c 20 6f 6e 20 70 69 6e |or signa|l on pin| |00002310| 20 32 32 2e 20 20 49 20 | 74 68 69 6e 6b 20 74 68 | 22. I |think th| |00002320| 61 74 20 74 68 69 73 20 | 73 69 67 6e 61 6c 2c 20 |at this |signal, | |00002330| 65 78 63 65 70 74 20 77 | 68 65 6e 20 74 68 65 20 |except w|hen the | |00002340| 70 68 6f 6e 65 20 6c 69 | 6e 65 20 74 6f 20 77 68 |phone li|ne to wh| |00002350| 69 63 68 20 74 68 65 20 | 6d 6f 64 65 6d 20 69 73 |ich the |modem is| |00002360| 20 63 6f 6e 6e 6e 65 63 | 74 65 64 20 69 73 20 72 | connnec|ted is r| |00002370| 69 6e 67 69 6e 67 2c 20 | 68 61 73 20 74 68 65 20 |inging, |has the | |00002380| 6e 65 67 61 74 69 76 65 | 20 76 6f 6c 74 61 67 65 |negative| voltage| |00002390| 20 6c 65 76 65 6c 20 6f | 6e 20 69 74 20 74 68 61 | level o|n it tha| |000023a0| 74 20 79 6f 75 20 6e 65 | 65 64 2e 29 20 20 4a 75 |t you ne|ed.) Ju| |000023b0| 73 74 20 74 61 6b 65 20 | 61 20 72 65 73 69 73 74 |st take |a resist| |000023c0| 6f 72 2c 20 6f 66 20 61 | 62 6f 75 74 20 31 4b bd |or, of a|bout 1K.| |000023d0| 20 6f 72 20 32 2e 32 4b | bd 2c 20 61 6e 64 20 63 | or 2.2K|., and c| |000023e0| 6f 6e 6e 65 63 74 65 64 | 20 69 74 20 62 65 74 77 |onnected| it betw| |000023f0| 65 65 6e 20 74 68 69 73 | 20 70 69 6e 20 61 6e 64 |een this| pin and| |00002400| 20 70 69 6e 20 32 30 20 | 6f 6e 20 74 68 65 20 44 | pin 20 |on the D| |00002410| 42 32 35 2e 20 20 4f 74 | 68 65 72 77 69 73 65 2c |B25. Ot|herwise,| |00002420| 20 79 6f 75 27 6c 6c 20 | 6a 75 73 74 20 68 61 76 | you'll |just hav| |00002430| 65 20 74 6f 20 70 72 6f | 76 69 64 65 20 74 68 65 |e to pro|vide the| |00002440| 20 76 6f 6c 74 61 67 65 | 20 69 6e 20 73 6f 6d 65 | voltage| in some| |00002450| 20 6f 74 68 65 72 20 77 | 61 79 2e 20 20 49 20 77 | other w|ay. I w| |00002460| 6f 75 6c 64 20 73 75 67 | 67 65 73 74 20 61 20 73 |ould sug|gest a s| |00002470| 74 61 6e 64 61 72 64 20 | 70 6f 77 65 72 20 61 64 |tandard |power ad| |00002480| 61 70 74 6f 72 2c 20 6f | 66 20 74 68 65 20 73 6f |aptor, o|f the so| |00002490| 72 74 20 79 6f 75 20 63 | 61 6e 20 67 65 74 20 61 |rt you c|an get a| |000024a0| 74 20 52 61 74 20 53 68 | 61 63 6b 2e 20 20 4d 61 |t Rat Sh|ack. Ma| |000024b0| 6b 65 20 73 75 72 65 20 | 69 74 20 68 61 73 20 61 |ke sure |it has a| |000024c0| 6e 20 6f 75 74 70 75 74 | 20 6f 66 20 73 6f 6d 65 |n output| of some| |000024d0| 77 68 65 72 65 20 69 6e | 20 74 68 65 20 72 61 6e |where in| the ran| |000024e0| 67 65 20 66 72 6f 6d 20 | 35 20 74 6f 20 31 35 20 |ge from |5 to 15 | |000024f0| 76 6f 6c 74 73 20 44 43 | 2e 20 20 43 6f 6e 6e 65 |volts DC|. Conne| |00002500| 63 74 20 74 68 65 20 70 | 6f 73 69 74 69 76 65 20 |ct the p|ositive | |00002510| 6f 75 74 70 75 74 20 6f | 66 20 74 68 69 73 20 61 |output o|f this a| |00002520| 64 61 70 74 6f 72 20 74 | 6f 20 74 68 65 20 73 69 |daptor t|o the si| |00002530| 67 6e 61 6c 20 67 72 6f | 75 6e 64 20 28 70 69 6e |gnal gro|und (pin| |00002540| 20 37 20 6f 6e 20 74 68 | 65 20 44 42 32 35 29 2e | 7 on th|e DB25).| |00002550| 20 20 43 6f 6e 6e 65 63 | 74 20 74 68 65 20 6e 65 | Connec|t the ne| |00002560| 67 61 74 69 76 65 20 6f | 75 74 70 75 74 20 74 68 |gative o|utput th| |00002570| 72 6f 75 67 68 20 61 20 | 72 65 73 69 73 74 6f 72 |rough a |resistor| |00002580| 2c 20 69 6e 20 74 68 65 | 20 31 4b bd 20 74 6f 20 |, in the| 1K. to | |00002590| 32 2e 32 4b bd 20 72 61 | 6e 67 65 2c 20 74 6f 20 |2.2K. ra|nge, to | |000025a0| 74 68 65 20 44 54 52 20 | 6c 69 6e 65 20 28 70 69 |the DTR |line (pi| |000025b0| 6e 20 32 30 20 6f 6e 20 | 74 68 65 20 44 42 32 35 |n 20 on |the DB25| |000025c0| 29 2e 0d 0d 20 20 54 68 | 65 72 65 20 69 73 20 6f |)... Th|ere is o| |000025d0| 6e 65 20 6f 74 68 65 72 | 20 70 72 6f 62 6c 65 6d |ne other| problem| |000025e0| 2c 20 77 68 69 63 68 20 | 49 20 6b 6e 6f 77 20 6f |, which |I know o| |000025f0| 66 2c 20 74 68 61 74 20 | 6d 61 79 20 72 65 71 75 |f, that |may requ| |00002600| 69 72 65 20 73 6f 6d 65 | 20 63 6f 72 72 65 63 74 |ire some| correct| |00002610| 69 6f 6e 20 69 6e 20 74 | 68 65 20 63 61 62 6c 65 |ion in t|he cable| |00002620| 2e 20 20 57 68 65 6e 20 | 49 20 73 61 69 64 20 74 |. 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As i| |000026c0| 74 20 74 75 72 6e 73 20 | 6f 75 74 2c 20 64 75 72 |t turns |out, dur| |000026d0| 69 6e 67 20 61 20 74 72 | 61 6e 73 69 74 69 6f 6e |ing a tr|ansition| |000026e0| 20 69 6e 20 74 68 65 20 | 54 78 44 20 73 74 61 74 | in the |TxD stat| |000026f0| 65 20 66 72 6f 6d 20 30 | 20 74 6f 20 31 20 6f 72 |e from 0| to 1 or| |00002700| 20 76 69 63 65 20 76 65 | 72 73 61 2c 20 66 6f 72 | vice ve|rsa, for| |00002710| 20 61 6e 20 76 65 72 79 | 20 73 68 6f 72 74 20 6d | an very| short m| |00002720| 6f 6d 65 6e 74 2c 20 74 | 68 65 72 65 20 6d 61 79 |oment, t|here may| |00002730| 20 6e 6f 74 20 62 65 20 | 61 20 76 6f 6c 74 61 67 | not be |a voltag| |00002740| 65 2e 20 20 49 74 20 74 | 75 72 6e 73 20 6f 75 74 |e. It t|urns out| |00002750| 20 74 68 61 74 20 6d 79 | 20 6d 6f 64 65 6d 20 73 | that my| modem s| |00002760| 65 65 6d 73 20 74 6f 20 | 68 61 76 65 20 61 20 22 |eems to |have a "| |00002770| 68 61 69 72 20 74 72 69 | 67 67 65 72 22 20 44 54 |hair tri|gger" DT| |00002780| 52 20 6c 69 6e 65 2e 20 | 20 41 6e 20 65 78 74 72 |R line. | An extr| |00002790| 65 6d 65 6c 79 20 73 68 | 6f 72 74 20 64 72 6f 70 |emely sh|ort drop| |000027a0| 20 69 6e 20 74 68 65 20 | 44 54 52 20 6c 69 6e 65 | in the |DTR line| |000027b0| 20 69 73 20 73 75 66 66 | 69 63 69 65 6e 74 20 74 | is suff|icient t| |000027c0| 6f 20 6d 61 6b 65 20 69 | 74 20 68 61 6e 67 20 75 |o make i|t hang u| |000027d0| 70 2c 20 6f 72 20 74 6f | 20 69 6e 20 6f 74 68 65 |p, or to| in othe| |000027e0| 72 20 77 61 79 73 20 61 | 64 76 65 72 73 65 6c 79 |r ways a|dversely| |000027f0| 20 61 66 66 65 63 74 20 | 74 68 65 20 6f 70 65 72 | affect |the oper| |00002800| 61 74 69 6f 6e 20 6f 66 | 20 74 68 65 20 6d 6f 64 |ation of| the mod| |00002810| 65 6d 2e 20 20 49 20 64 | 6f 20 6e 6f 74 20 74 68 |em. I d|o not th| |00002820| 69 6e 6b 20 74 68 69 73 | 20 69 73 20 68 6f 77 20 |ink this| is how | |00002830| 6d 6f 73 74 20 6d 6f 64 | 65 6d 73 20 62 65 68 61 |most mod|ems beha| |00002840| 76 65 2e 20 20 49 20 74 | 68 69 6e 6b 20 6d 6f 73 |ve. I t|hink mos| |00002850| 74 20 6d 6f 64 65 6d 73 | 20 72 65 71 75 69 72 65 |t modems| require| |00002860| 20 61 20 6c 6f 6e 67 65 | 72 20 64 72 6f 70 20 6f | a longe|r drop o| |00002870| 6e 20 74 68 65 20 44 54 | 52 20 6c 69 6e 65 3b 20 |n the DT|R line; | |00002880| 73 6f 6d 65 20 6d 6f 64 | 65 6d 73 20 65 76 65 6e |some mod|ems even| |00002890| 20 6c 65 74 20 79 6f 75 | 20 73 70 65 63 69 66 79 | let you| specify| |000028a0| 20 68 6f 77 20 6c 6f 6e | 67 20 74 68 65 20 64 72 | how lon|g the dr| |000028b0| 6f 70 20 6d 75 73 74 20 | 62 65 2e 0d 0d 20 20 49 |op must |be... I| |000028c0| 20 73 6f 6c 76 65 64 20 | 74 68 69 73 20 70 72 6f | solved |this pro| |000028d0| 62 6c 65 6d 20 62 79 20 | 63 6f 6e 6e 65 63 74 69 |blem by |connecti| |000028e0| 6e 67 20 61 20 31 30 30 | b5 46 20 63 61 70 61 63 |ng a 100|.F capac| |000028f0| 69 74 6f 72 20 61 6e 64 | 20 61 20 32 2e 32 4b bd |itor and| a 2.2K.| |00002900| 20 72 65 73 69 73 74 6f | 72 20 69 6e 20 70 61 72 | resisto|r in par| |00002910| 61 6c 6c 65 6c 20 66 72 | 6f 6d 20 74 68 65 20 44 |allel fr|om the D| |00002920| 54 52 20 6c 69 6e 65 20 | 28 70 69 6e 20 32 30 20 |TR line |(pin 20 | |00002930| 6f 6e 20 74 68 65 20 44 | 42 32 35 29 20 74 6f 20 |on the D|B25) to | |00002940| 74 68 65 20 73 69 67 6e | 61 6c 20 67 72 6f 75 6e |the sign|al groun| |00002950| 64 20 28 70 69 6e 20 37 | 20 6f 6e 20 74 68 65 20 |d (pin 7| on the | |00002960| 44 42 32 35 29 2e 20 20 | 54 68 69 73 20 69 73 20 |DB25). |This is | |00002970| 66 6f 72 20 74 68 65 20 | 63 61 73 65 20 77 68 65 |for the |case whe| |00002980| 72 65 20 74 68 65 20 6d | 6f 64 65 6d 27 73 20 44 |re the m|odem's D| |00002990| 54 52 20 6c 69 6e 65 20 | 66 6c 6f 61 74 73 20 6c |TR line |floats l| |000029a0| 6f 77 2e 20 20 49 66 20 | 79 6f 75 27 72 65 20 62 |ow. If |you're b| |000029b0| 75 69 6c 64 69 6e 67 20 | 61 20 63 61 62 6c 65 20 |uilding |a cable | |000029c0| 66 6f 72 20 74 68 65 20 | 63 61 73 65 20 77 68 65 |for the |case whe| |000029d0| 72 65 20 74 68 65 20 44 | 54 52 20 66 6c 6f 61 74 |re the D|TR float| |000029e0| 73 20 68 69 67 68 2c 20 | 73 69 6d 70 6c 79 20 70 |s high, |simply p| |000029f0| 6c 61 63 65 20 61 20 31 | 30 30 b5 46 20 63 61 70 |lace a 1|00.F cap| |00002a00| 61 63 69 74 6f 72 20 69 | 6e 20 70 61 72 61 6c 6c |acitor i|n parall| |00002a10| 65 6c 20 77 69 74 68 20 | 74 68 65 20 72 65 73 69 |el with |the resi| |00002a20| 73 74 6f 72 20 74 68 61 | 74 20 79 6f 75 27 72 65 |stor tha|t you're| |00002a30| 20 61 6c 72 65 61 64 79 | 20 62 65 65 6e 20 74 6f | already| been to| |00002a40| 6c 64 20 74 6f 20 70 75 | 74 20 62 65 74 77 65 65 |ld to pu|t betwee| |00002a50| 6e 20 74 68 65 20 44 54 | 52 20 6c 69 6e 65 20 61 |n the DT|R line a| |00002a60| 6e 64 20 79 6f 75 72 20 | 6e 65 67 61 74 69 76 65 |nd your |negative| |00002a70| 20 76 6f 6c 74 61 67 65 | 20 73 6f 75 72 63 65 2e | voltage| source.| |00002a80| 0d 0d 20 20 54 68 69 73 | 20 73 68 6f 75 6c 64 20 |.. This| should | |00002a90| 62 65 20 61 6c 6c 20 79 | 6f 75 20 6e 65 65 64 20 |be all y|ou need | |00002aa0| 61 73 20 66 61 72 20 61 | 73 20 62 75 69 6c 64 69 |as far a|s buildi| |00002ab0| 6e 67 20 61 20 63 61 62 | 6c 65 2e 0d 0d 0d 55 73 |ng a cab|le....Us| |00002ac0| 69 6e 67 20 74 68 65 20 | 53 6f 66 74 77 61 72 65 |ing the |Software| |00002ad0| 3a 0d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |:.------|--------| |00002ae0| 2d 2d 2d 2d 2d 0d 0d 20 | 20 54 68 65 20 73 6f 66 |-----.. | The sof| |00002af0| 74 77 61 72 65 20 69 73 | 20 69 6e 63 6c 75 64 65 |tware is| include| |00002b00| 64 20 69 6e 20 74 77 6f | 20 66 6f 72 6d 73 2e 20 |d in two| forms. | |00002b10| 20 48 61 6e 67 55 70 2e | 50 52 4f 43 20 69 73 20 | HangUp.|PROC is | |00002b20| 61 20 70 72 6f 63 65 64 | 75 72 65 20 74 6f 20 62 |a proced|ure to b| |00002b30| 65 20 63 61 6c 6c 65 64 | 20 75 6e 64 65 72 20 57 |e called| under W| |00002b40| 68 69 74 65 20 4b 6e 69 | 67 68 74 2e 20 20 59 6f |hite Kni|ght. Yo| |00002b50| 75 20 6d 61 79 20 69 6e | 76 6f 6b 65 20 69 74 20 |u may in|voke it | |00002b60| 77 69 74 68 20 74 68 65 | 20 49 6e 69 74 69 61 74 |with the| Initiat| |00002b70| 65 20 50 72 6f 63 65 64 | 75 72 65 c9 20 63 6f 6d |e Proced|ure. com| |00002b80| 6d 61 6e 64 20 69 6e 20 | 57 68 69 74 65 20 4b 6e |mand in |White Kn| |00002b90| 69 67 68 74 2c 20 6f 72 | 20 73 65 74 20 75 70 20 |ight, or| set up | |00002ba0| 61 20 6b 65 79 62 6f 61 | 72 64 20 6d 61 63 72 6f |a keyboa|rd macro| |00002bb0| 20 77 68 69 63 68 20 63 | 61 6c 6c 73 20 69 74 2e | which c|alls it.| |00002bc0| 20 20 59 6f 75 20 6d 61 | 79 20 61 6c 73 6f 20 63 | You ma|y also c| |00002bd0| 61 6c 6c 20 74 68 69 73 | 20 70 72 6f 63 65 64 75 |all this| procedu| |00002be0| 72 65 20 66 72 6f 6d 20 | 79 6f 75 72 20 6f 77 6e |re from |your own| |00002bf0| 20 70 72 6f 63 65 64 75 | 72 65 73 20 62 79 20 75 | procedu|res by u| |00002c00| 73 69 6e 67 20 74 68 65 | 20 4e 45 53 54 20 73 74 |sing the| NEST st| |00002c10| 61 74 65 6d 65 6e 74 2e | 0d 0d 20 20 54 68 65 20 |atement.|.. The | |00002c20| 61 63 74 75 61 6c 20 48 | 61 6e 67 55 70 20 63 6f |actual H|angUp co| |00002c30| 64 65 20 69 73 20 69 6e | 20 61 6e 20 52 43 4d 44 |de is in| an RCMD| |00002c40| 20 72 65 73 6f 75 72 63 | 65 20 63 6f 6e 74 61 69 | resourc|e contai| |00002c50| 6e 65 64 20 69 6e 20 74 | 68 65 20 72 65 73 6f 75 |ned in t|he resou| |00002c60| 72 63 65 20 66 6f 72 6b | 20 6f 66 20 48 61 6e 67 |rce fork| of Hang| |00002c70| 55 70 2e 50 52 4f 43 2e | 20 20 54 68 69 73 20 52 |Up.PROC.| This R| |00002c80| 43 4d 44 20 61 75 74 6f | 6d 61 74 69 63 61 6c 6c |CMD auto|maticall| |00002c90| 79 20 64 65 74 65 72 6d | 69 6e 65 73 20 77 68 69 |y determ|ines whi| |00002ca0| 63 68 20 73 65 72 69 61 | 6c 20 70 6f 72 74 20 79 |ch seria|l port y| |00002cb0| 6f 75 27 72 65 20 75 73 | 69 6e 67 2c 20 61 6e 64 |ou're us|ing, and| |00002cc0| 20 68 6f 77 20 6d 61 6e | 79 20 62 69 74 73 2f 63 | how man|y bits/c| |00002cd0| 68 61 72 61 63 74 65 72 | 2e 20 20 48 61 6e 67 55 |haracter|. HangU| |00002ce0| 70 20 6e 65 65 64 73 20 | 74 6f 20 6b 6e 6f 77 20 |p needs |to know | |00002cf0| 74 68 69 73 2c 20 62 65 | 63 61 75 73 65 20 74 68 |this, be|cause th| |00002d00| 65 20 73 61 6d 65 20 38 | 35 33 30 20 72 65 67 69 |e same 8|530 regi| |00002d10| 73 74 65 72 20 74 68 61 | 74 20 69 73 20 75 73 65 |ster tha|t is use| |00002d20| 64 20 74 6f 20 63 6f 6e | 74 72 6f 6c 20 74 68 65 |d to con|trol the| |00002d30| 20 52 54 53 20 6c 69 6e | 65 20 61 6c 73 6f 20 73 | RTS lin|e also s| |00002d40| 65 74 73 20 74 68 65 20 | 62 69 74 73 2f 63 68 61 |ets the |bits/cha| |00002d50| 72 61 63 74 65 72 2e 0d | 0d 20 20 54 68 65 20 6f |racter..|. The o| |00002d60| 74 68 65 72 20 66 6f 72 | 6d 20 69 6e 20 77 68 69 |ther for|m in whi| |00002d70| 63 68 20 48 61 6e 67 55 | 70 20 69 73 20 70 72 6f |ch HangU|p is pro| |00002d80| 76 69 64 65 64 20 69 73 | 20 61 20 73 65 74 20 6f |vided is| a set o| |00002d90| 66 20 46 4b 45 59 73 2e | 20 20 53 69 6e 63 65 20 |f FKEYs.| Since | |00002da0| 74 68 65 20 46 4b 45 59 | 73 20 68 61 76 65 20 6e |the FKEY|s have n| |00002db0| 6f 20 77 61 79 20 6f 66 | 20 6b 6e 6f 77 69 6e 67 |o way of| knowing| |00002dc0| 20 77 68 69 63 68 20 73 | 65 72 69 61 6c 20 70 6f | which s|erial po| |00002dd0| 72 74 20 79 6f 75 27 72 | 65 20 75 73 69 6e 67 2c |rt you'r|e using,| |00002de0| 20 6f 72 20 68 6f 77 20 | 6d 61 6e 79 20 62 69 74 | or how |many bit| |00002df0| 73 2f 63 68 61 72 61 63 | 74 65 72 2c 20 79 6f 75 |s/charac|ter, you| |00002e00| 27 6c 6c 20 6e 65 65 64 | 20 74 6f 20 6d 61 6b 65 |'ll need| to make| |00002e10| 20 73 75 72 65 20 79 6f | 75 20 69 6e 76 6f 6b 65 | sure yo|u invoke| |00002e20| 20 74 68 65 20 63 6f 72 | 72 65 63 74 20 6f 6e 65 | the cor|rect one| |00002e30| 2e 20 20 41 74 20 74 68 | 69 73 20 77 72 69 74 69 |. At th|is writi| |00002e40| 6e 67 2c 20 66 6f 75 72 | 20 61 72 65 20 70 72 6f |ng, four| are pro| |00002e50| 76 69 64 65 64 2e 20 20 | 48 61 6e 67 55 70 20 41 |vided. |HangUp A| |00002e60| 38 20 61 6e 64 20 48 61 | 6e 67 55 70 20 41 37 20 |8 and Ha|ngUp A7 | |00002e70| 61 72 65 20 74 6f 20 62 | 65 20 75 73 65 64 20 66 |are to b|e used f| |00002e80| 6f 72 20 74 68 65 20 6d | 6f 64 65 6d 20 70 6f 72 |or the m|odem por| |00002e90| 74 2c 20 77 69 74 68 20 | 38 20 61 6e 64 20 37 20 |t, with |8 and 7 | |00002ea0| 62 69 74 73 2f 63 68 61 | 72 61 63 74 65 72 20 72 |bits/cha|racter r| |00002eb0| 65 73 70 65 63 74 69 76 | 65 6c 79 2e 20 20 53 69 |espectiv|ely. Si| |00002ec0| 6d 69 6c 61 72 6c 79 2c | 20 48 61 6e 67 55 70 20 |milarly,| HangUp | |00002ed0| 42 38 20 61 6e 64 20 48 | 61 6e 67 55 70 20 42 37 |B8 and H|angUp B7| |00002ee0| 20 61 72 65 20 66 6f 72 | 20 75 73 65 20 77 69 74 | are for| use wit| |00002ef0| 68 20 74 68 65 20 70 72 | 69 6e 74 65 72 20 70 6f |h the pr|inter po| |00002f00| 72 74 2e 20 20 59 6f 75 | 20 6d 61 79 20 72 65 6e |rt. You| may ren| |00002f10| 75 6d 62 65 72 20 74 68 | 65 73 65 20 46 4b 45 59 |umber th|ese FKEY| |00002f20| 73 20 77 69 74 68 20 52 | 65 73 45 64 69 74 20 74 |s with R|esEdit t| |00002f30| 6f 20 69 6e 76 6f 6b 65 | 20 74 68 65 6d 20 69 6e |o invoke| them in| |00002f40| 20 74 68 65 20 6e 6f 72 | 6d 61 6c 20 77 61 79 3b | the nor|mal way;| |00002f50| 20 62 65 74 74 65 72 20 | 79 65 74 2c 20 67 65 74 | better |yet, get| |00002f60| 20 61 20 75 74 69 6c 69 | 74 79 20 6c 69 6b 65 20 | a utili|ty like | |00002f70| 51 75 69 63 6b 4b 65 79 | 73 20 77 68 69 63 68 20 |QuickKey|s which | |00002f80| 79 6f 75 20 63 61 6e 20 | 75 73 65 20 74 6f 20 61 |you can |use to a| |00002f90| 73 73 69 67 6e 20 61 20 | 6d 6f 72 65 20 6c 6f 67 |ssign a |more log| |00002fa0| 69 63 61 6c 20 6b 65 79 | 73 74 72 6f 6b 65 20 74 |ical key|stroke t| |00002fb0| 6f 20 74 68 65 6d 2e 0d | 0d 20 20 49 20 67 75 65 |o them..|. I gue| |00002fc0| 73 73 20 74 68 65 72 65 | 27 73 20 6e 6f 74 20 61 |ss there|'s not a| |00002fd0| 20 77 68 6f 6c 65 20 6c | 6f 74 20 6d 6f 72 65 20 | whole l|ot more | |00002fe0| 74 6f 20 73 61 79 20 61 | 62 6f 75 74 20 74 68 69 |to say a|bout thi| |00002ff0| 73 20 73 6f 66 74 77 61 | 72 65 2e 20 20 57 68 65 |s softwa|re. Whe| |00003000| 6e 20 61 6e 79 20 66 6f | 72 6d 20 6f 66 20 74 68 |n any fo|rm of th| |00003010| 69 73 20 73 6f 66 74 77 | 61 72 65 20 69 73 20 69 |is softw|are is i| |00003020| 6e 76 6f 6b 65 64 2c 20 | 69 74 20 73 69 6d 70 6c |nvoked, |it simpl| |00003030| 79 20 77 72 69 74 65 73 | 20 74 6f 20 74 68 65 20 |y writes| to the | |00003040| 38 35 33 30 20 53 43 43 | 20 74 6f 20 74 65 6c 6c |8530 SCC| to tell| |00003050| 20 69 74 20 74 6f 20 64 | 72 6f 70 20 74 68 65 20 | it to d|rop the | |00003060| 52 54 53 20 6c 69 6e 65 | 20 28 77 68 69 63 68 20 |RTS line| (which | |00003070| 72 65 73 75 6c 74 73 20 | 69 6e 20 74 68 65 20 20 |results |in the | |00003080| 54 78 44 20 6c 69 6e 65 | 73 20 6f 6e 20 74 68 65 |TxD line|s on the| |00003090| 20 73 65 72 69 61 6c 20 | 70 6f 72 74 20 62 65 69 | serial |port bei| |000030a0| 6e 67 20 6f 70 65 6e 65 | 64 29 20 77 61 69 74 73 |ng opene|d) waits| |000030b0| 20 6f 6e 65 20 73 65 63 | 6f 6e 64 2c 20 74 68 65 | one sec|ond, the| |000030c0| 6e 20 77 72 69 74 65 73 | 20 74 68 65 20 53 43 43 |n writes| the SCC| |000030d0| 20 61 67 61 69 6e 20 74 | 6f 20 72 61 69 73 65 20 | again t|o raise | |000030e0| 74 68 65 20 52 54 53 20 | 73 69 67 6e 61 6c 2e 0d |the RTS |signal..| |000030f0| 0d 20 20 46 6f 72 20 63 | 6f 6d 6d 65 6e 74 73 2c |. For c|omments,| |00003100| 20 62 75 67 20 72 65 70 | 6f 72 74 73 2c 20 73 75 | bug rep|orts, su| |00003110| 67 67 65 73 74 69 6f 6e | 73 2c 20 6f 72 20 77 68 |ggestion|s, or wh| |00003120| 61 74 65 76 65 72 2c 20 | 49 20 63 61 6e 20 62 65 |atever, |I can be| |00003130| 20 72 65 61 63 68 65 64 | 20 6d 6f 73 74 20 72 65 | reached| most re| |00003140| 61 64 69 6c 79 20 61 74 | 20 74 68 65 20 42 6f 77 |adily at| the Bow| |00003150| 68 65 61 64 20 57 68 61 | 6c 65 20 42 42 53 2c 20 |head Wha|le BBS, | |00003160| 61 74 20 28 38 30 35 29 | 39 36 34 2d 55 4e 49 58 |at (805)|964-UNIX| |00003170| 2e 20 20 4a 75 73 74 20 | 73 65 6e 64 20 6d 61 69 |. Just |send mai| |00003180| 6c 20 74 68 65 72 65 20 | 74 6f 20 22 42 6f 62 20 |l there |to "Bob | |00003190| 42 6c 61 79 6c 6f 63 6b | 22 2e 0d 0d 20 20 49 20 |Blaylock|"... I | |000031a0| 63 61 6e 20 61 6c 73 6f | 20 62 65 20 72 65 61 63 |can also| be reac| |000031b0| 68 65 64 20 6c 65 73 73 | 20 71 75 69 63 6b 6c 79 |hed less| quickly| |000031c0| 20 6f 6e 20 41 6d 65 72 | 69 63 61 20 4f 6e 4c 69 | on Amer|ica OnLi| |000031d0| 6e 65 20 62 79 20 74 68 | 65 20 6e 61 6d 65 20 22 |ne by th|e name "| |000031e0| 54 68 65 42 6f 62 22 2c | 20 6f 72 20 6f 6e 20 47 |TheBob",| or on G| |000031f0| 45 6e 69 65 2c 20 61 73 | 20 22 42 2e 42 6c 61 79 |Enie, as| "B.Blay| |00003200| 6c 6f 63 6b 22 2e 00 00 | 00 00 00 00 00 00 00 00 |lock"...|........| |00003210| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00003220| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00003230| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00003240| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00003250| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00003260| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00003270| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |00003280| 00 00 01 00 00 00 01 b8 | 00 00 00 b8 00 00 00 32 |........|.......2| |00003290| 30 7f 04 4a a8 00 a0 66 | 28 1b 7c 66 01 fd 2e 86 |0..J...f|(.|f....| |000032a0| 01 2c f7 26 38 01 67 12 | 55 56 01 72 01 c1 26 14 |.,.&8.g.|UV.r..&.| |000032b0| 0a 48 61 6e 67 55 70 2e | 64 6f 63 00 02 00 00 00 |.HangUp.|doc.....| |000032c0| 54 45 58 54 74 74 78 74 | 01 00 ff e6 00 40 00 00 |TEXTttxt|.....@..| |000032d0| 00 00 54 45 58 54 74 74 | 78 74 01 00 ff e6 00 40 |..TEXTtt|xt.....@| |000032e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| |000032f0| 00 00 a5 1e 66 f1 00 00 | 00 00 00 00 01 ea 03 31 |....f...|.......1| |00003300| 8e 01 00 96 7f 01 31 6e | 3c 01 01 22 7f 01 11 7c |......1n|<.."...|| |00003310| 66 01 01 29 7f 03 4a a8 | 00 a0 66 7c 7d 02 c0 ae |f..)..J.|..f|}...| |00003320| ff b4 29 02 1e 00 1c 07 | 55 cc 60 58 3a 20 01 b0 |..).....|U.`X: ..| |00003330| 48 01 67 3e 86 01 2c fa | 57 01 ff 78 50 01 10 f2 |H.g>..,.|W..xP...| |00003340| ce 01 ff 28 3d 01 ff 3c | 28 01 ff 22 57 40 50 3f |...(=..<|(.."W@P?| |00003350| 34 48 be da 01 ff 58 a5 | 02 7c 01 47 ee 40 02 4a |4H....X.|.|.G.@.J| |00003360| 06 67 10 52 55 56 26 20 | 02 35 01 fe fc 65 4e ff |.g.RUV& |.5...eN.| |00003370| 00 00 02 b2 a8 9f 65 72 | 00 12 08 01 00 00 03 70 |......er|.......p| |00003380| 00 00 00 b4 01 00 80 00 | 00 00 20 43 6f 70 79 72 |........|.. Copyr| |00003390| 69 67 68 74 20 a9 20 31 | 39 39 31 20 62 79 20 42 |ight . 1|991 by B| |000033a0| 6f 62 20 42 6c 61 79 6c | 6f 63 6b 8c 48 61 6e 67 |ob Blayl|ock.Hang| |000033b0| 55 70 0d 43 6f 70 79 72 | 69 67 68 74 20 a9 20 31 |Up.Copyr|ight . 1| |000033c0| 39 39 31 20 62 79 20 42 | 6f 62 20 42 6c 61 79 6c |991 by B|ob Blayl| |000033d0| 6f 63 6b 0d 52 65 61 64 | 20 48 61 6e 67 55 70 2e |ock.Read| HangUp.| |000033e0| 64 6f 63 20 66 6f 72 20 | 74 68 65 20 74 65 72 6d |doc for |the term| |000033f0| 73 20 6f 66 20 74 68 69 | 73 20 63 6f 70 79 72 69 |s of thi|s copyri| |00003400| 67 68 74 2c 20 61 73 20 | 77 65 6c 6c 20 61 73 20 |ght, as |well as | |00003410| 69 6e 73 74 72 75 63 74 | 69 6f 6e 73 20 6f 6e 20 |instruct|ions on | |00003420| 68 6f 77 20 74 6f 20 75 | 73 65 20 74 68 69 73 20 |how to u|se this | |00003430| 70 61 63 6b 61 67 65 2e | 00 00 01 00 00 00 01 b8 |package.|........| |00003440| 00 00 00 b8 00 00 00 32 | 00 5a dd 9c 0b c2 00 00 |.......2|.Z......| |00003450| 00 1c 00 32 00 00 76 65 | 72 73 00 00 00 0a 00 01 |...2..ve|rs......| |00003460| ff ff 00 00 00 00 00 5a | dc 24 00 00 00 00 00 00 |.......Z|.$......| |00003470| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........| +--------+-------------------------+-------------------------+--------+--------+