Programmer 7500

home *** CD-ROM | disk | FTP | other *** search

/ Programmer 7500 / MAX_PROGRAMMERS.iso / PROGRAMS / UTILS / FLOPPIES / CHUNK.ZIP / CHKNGLUE.WS < prev next >

Wrap

Text File | 1987-04-17 | 40.0 KB | 755 lines

.. THIS FILE COMPATABLE WITH NEWWORD/WORDSTAR RELEASE 4 .RR--!----!----!----!----!----!----!----!----!----!----!------------------R .cw9 .. Approximately 12 pitch Chunδ 'ε Gluσ V1.5 I. Introduction A≤ yo⌡ probabl∙ know¼ thσ packe⌠ radi∩ channel≤ havσ becomσ extremel∙ ì crowded« Onσ oµ thσ contributinτ factor≤ t∩ thi≤ crowdinτ i≤ lonτ filσ ì transfers¼ usuall∙ viß thσ linkeΣ BB╙ system« Transfer≤ oµ file≤ large≥ ì thaε abou⌠ 10kΓ arσ usuall∙ impractica∞ anΣ alway≤ considereΣ t∩ bσ antΘ-ì socia∞ behavior« AnΣ iµ yo⌡ arσ interesteΣ iε sendinτ ASCI╔-encodeΣ binar∙ ì file≤ usinτ onσ oµ thσ popula≥ protocol≤ sucΦ a≤ PAK¼ PAK/UNPAK¼ BTOA¼ BSQ¼ ì etc.¼ yo⌡ kno≈ thσ probleφ i≤ eveε morσ severe« Thesσ file≤ arσ HUGE« S∩ ì wha⌠ t∩ do« Wel∞ thσ obviou≤ solutioε i≤ t∩ breaδ thσ largσ file≤ u≡ int∩ ì littlσ chunk≤ fo≥ transmissioε anΣ recombinσ theφ a⌠ thσ receivinτ end« ì PAK/UNPA╦ support≤ smal∞ files¼ bu⌠ it≤ encodinτ schemσ i≤ fairl∙ ì inefficien⌠ resultinτ iε mucΦ morσ transmissioε datß thaε d∩ thσ others« ì AnΣ PAK/UNPA╦ canno⌠ breaδ u≡ tex⌠ file≤ withou⌠ encodinτ theφ thu≤ ì expandinτ thei≥ sizes« S∩ again¼ wha⌠ t∩ do. Well¼ ß cr∙ froφ thσ wildernes≤ wa≤ heard¼ sayinτ "Writσ ß program....« ì writσ ß program...."¼ s∩ ╔ didí ╔ aφ ß firφ believe≥ iε thσ UNI╪ concep⌠ ì whicΦ i≤ onσ oµ ß "toolboxó oµ program≤ anΣ utilities« EacΦ too∞ i≤ ì designeΣ t∩ d∩ onl∙ ▒ thinτ bu⌠ d∩ i⌠ well« S∩ thσ obviou≤ solutioε wa≤ t∩ writσ ß prograφ tha⌠ woulΣ takσ aε asciΘ ì textfile¼ spli⌠ i⌠ u≡ int∩ littlσ chunk≤ anΣ wra≡ thσ chunk≤ iε sufficien⌠ ì protectioε s∩ a≤ t∩ havσ ß reasonablσ assurancσ tha⌠ the∙ wil∞ survivσ thσ ì tri≡ ove≥ thσ packe⌠ channels« Thu≤ CHUNKé whicΦ chunk≤ 'eφ u≡ anΣ GLU┼ é ì whicΦ glue≤ theφ bacδ togethe≥ again. II« ┴ usagσ example. Supposσ ╔ haΣ ß grou≡ oµ relateΣ file≤ tha⌠ ╔ wanteΣ t∩ senΣ t∩ ß frienΣ iε ì Floridß viß thσ packe⌠ network« Fo≥ example¼ let≤ takσ thi≤ package¼ ì Chunk'n'Glue« Thσ file≤ woulΣ bσ CHUNK.EXE¼ CHUNK.C¼ GLUE.EXE¼ GLUE.C¼ ì CHUNK¼ GLUE¼ anΣ CHKNGLUE.DOC« Thσ mos⌠ efficien⌠ wa∙ woulΣ bσ t∩ combinσ ì theφ int∩ aε ARChivσ filσ usinτ thσ popula≥ publiπ domaiε prograφ ARC.EXE« ì Thσ commanΣ linσ woulΣ be: AR├ ┴ CHUN╦ *.*<CR> whicΦ woulΣ resul⌠ iε ß filσ CHUNK.AR├ beinτ createΣ anΣ al∞ thσ abovσ ì file≤ beinτ included« AR├ doe≤ ß ver∙ sophisticateΣ datß compressioε ì algorithφ oε thσ incominτ files¼ s∩ thσ arπ filσ wil∞ bσ mucΦ smalle≥ thaε ì thσ tota∞ sizσ oµ al∞ thσ inpu⌠ files. S∩ no≈ wσ havσ aε AR├ filσ whicΦ i≤ stil∞ purσ binar∙ anΣ thu≤ incompatiblσ ì witΦ thσ bb≤ system« Wel∞ therσ arσ severa∞ program≤ availablσ sucΦ a≤ ì PAK¼ BSQ¼ anΣ BTOA¼ bu⌠ al∞ bu⌠ BTO┴ attemp⌠ thei≥ owε compressioε a≤ the∙ ì encode« Generall∙ speaking¼ it'≤ ß n∩-n∩ t∩ recompres≤ datß that'≤ alread∙ ì beeε compressed« Thσ resultinτ filσ tend≤ t∩ bσ HUGE« So¼ sincσ we'rσ ì alread∙ compresseΣ iε thσ AR├ file¼ BTO┴ i≤ thσ weapoε oµ choice« Thσ ì commanΣ linσ woulΣ be: BTO┴ CHUNK.AR├ CHUNK.BTA<CR> èThi≤ wil∞ producσ CHUNK.BT┴ whicΦ wil∞ bσ abou⌠ 20Ñ large≥ thaε CHUNK.ARC« ì CHUNK.BT┴ i≤ consist≤ entirel∙ oµ printablσ ASCI╔ character≤ anΣ s∩ i≤ ì compatiblσ witΦ packe⌠ bbs's« Onl∙ onσ problem« Wheε ╔ encodeΣ thi≤ file¼ ì thσ BT┴ filσ wa≤ ove≥ 44δ longí Sendinτ somethinτ likσ tha⌠ i≤ clearl∙ ì antΘ-social! "S∩ wiseguy"¼ yo⌡ migh⌠ ask¼ "jus⌠ wha⌠ I╙ social?ó GooΣ question« ì Severa∞ consideration≤ ente≥ int∩ thσ discussion« Firs⌠ i≤ thσ "gooΣ ì neighboró philosophy« Tha⌠ is¼ sincσ ß packe⌠ channe∞ caε onl∙ reall∙ ì suppor⌠ onσ use≥ a⌠ ß timσ iµ hσ i≤ sendinτ files¼ onσ shoulΣ no⌠ hoτ thσ ì channel« Everyonσ ha≤ hi≤ owε opinioε abou⌠ hogging¼ bu⌠ iε general¼ ╔ tr∙ ì t∩ limi⌠ m∙ occupanc∙ oµ thσ channe∞ t∩ n∩ morσ thaε abou⌠ 1░ minute≤ a⌠ ß ì time« Anothe≥ ver∙ importan⌠ consideratioε i≤ thσ capabilit∙ oµ thσ BBS≤ ì tha⌠ wil∞ bσ handlinτ thσ files« Iµ you≥ loca∞ bb≤ i≤ ß XERO╪-baseΣ ì system¼ he'l∞ probabl∙ havσ 5░-75δ oµ freσ storagσ fo≥ "mailó files« ┴ P├ ì systeφ runninτ ofµ floppie≤ i≤ no⌠ mucΦ bette≥ off« S∩ yo⌡ reall∙ shoulΣ ì no⌠ fil∞ thσ wholσ systeφ u≡ witΦ you≥ filσ transfer. Yo⌡ obviousl∙ havσ t∩ looδ a⌠ thσ transmissioε mediuφ wheε makinτ you≥ ì decision« Iµ yo⌡ arσ sendinτ t∩ aε adjacen⌠ bb≤ o≥ ß frienΣ onσ digΘ ho≡ ì away¼ theε mucΦ large≥ file≤ arσ tolerablσ thaε iµ yo⌡ arσ goinτ througΦ ┤ ì digi≤ o≥ ou⌠ oε HF« Similarly¼ a⌠ 3:00aφ iε thσ morning¼ yo⌡ caε senΣ ì large≥ file≤ thaε a⌠ 7:00pm! Al∞ oµ thesσ argument≤ poin⌠ t∩ sendinτ viß ß buncΦ oµ smal∞ file≤ bu⌠ ì therσ i≤ ß consideratioε tha⌠ argue≤ t∩ thσ contrary« ┴ wholσ buncΦ oµ ì files¼ sa∙ >10¼ file≤ arσ likel∙ t∩ ge⌠ los⌠ o≥ a⌠ leas⌠ takσ foreve≥ ì gettinτ t∩ you≥ destination« S∩ ß compromisσ i≤ iε order. Wha⌠ I'vσ founΣ t∩ worδ wel∞ i≤ t∩ senΣ file≤ iε abou⌠ 10δ chunk≤ iµ yo⌡ ì arσ goinτ ove≥ ß soliΣ ▒ ho≡ VH╞ link« Fo≥ H╞ o≥ poo≥ links¼ n∩ morσ thaε ì 5╦ i≤ indicated. S∩ fo≥ ou≥ example¼ let≤ assumσ we'vσ go⌠ ß gooΣ soliΣ VH╞ patΦ s∩ wσ caε ì usσ 10δ chunks« Thσ objectivσ thereforσ i≤ t∩ breaδ thi≤ 44δ .BT┴ filσ u≡ ì int∩ 10δ chunk≤ fo≥ transmissioε anΣ theε bσ ablσ t∩ pu⌠ theφ bacδ togethe≥ ì int∩ thσ origina∞ filσ oε thσ receivinτ end« Wel∞ yo⌡ coulΣ usσ you≥ ì favoritσ edito≥ bu⌠ thi≤ i≤ generall∙ ß poo≥ solution« First¼ editor≤ ì generall∙ don'⌠ likσ reall∙ biτ files« Second¼ the∙ tenΣ t∩ pu⌠ funn∙ ì thing≤ likσ ^z'≤ iε thσ files« Third¼ therσ i≤ n∩ wa∙ oµ knowinτ iµ ß ì portioε oµ ß chunδ ha≤ beeε los⌠ somehow« Then¼ oµ course¼ oε thσ ì receivinτ end¼ yo⌡ havσ t∩ makσ surσ yo⌡ pu⌠ thσ chunk≤ bacδ togethe≥ iε ì thσ righ⌠ order. Here'≤ wherσ Chunk'N'Glueé comσ in« Chunké simpl∙ break≤ u≡ thσ inpu⌠ filσ ì int∩ smal∞ chunk≤ anΣ theε surrounΣ eacΦ chunδ witΦ "tokensó o≥ marker≤ ì tha⌠ sho≈ exactl∙ wherσ thσ chunδ begin≤ anΣ ends« Yo⌡ caε tel∞ Chunké ho≈ ì biτ t∩ makσ eacΦ chunk¼ bu⌠ iµ yo⌡ don't¼ i⌠ default≤ t∩ 5k« Convenient¼ ì eh┐ Iε thi≤ example¼ we'l∞ usσ ß chunksizσ oµ 10k« S∩ t∩ chunδ thσ ì CHUNK.AR├ file¼ yo⌡ woulΣ simpl∙ type: CHUN╦ CHUNK.BT┴ -s10000<CR> .pa èChunké woulΣ theε proces≤ thσ .BT┴ filσ int∩ littlσ chunks¼ iε thi≤ casσ 5¼ ì anΣ tel∞ yo⌡ wha⌠ i⌠ did« EacΦ chunδ filσ ha≤ thσ name: CHUNK.CH° Wherσ ° i≤ ß sequentia∞ lette≥ startinτ witΦ A. S∩ iε thi≤ case¼ thσ file≤ CHUNK.CHA¼ CHUNK.CHB¼ CHUNK.CHC¼ CHUNK.CHD¼ ª ì CHUNK.CH┼ werσ created. No≈ yo⌡ caε senΣ thesσ files¼ onσ a⌠ ß timσ t∩ you≥ frienΣ viß packet« ì Wheε hσ get≤ them¼ hσ simpl∙ types: GLU┼ CHUNK<CR> Glueé firs⌠ check≤ t∩ seσ iµ al∞ thσ chunδ file≤ arσ there¼ anΣ iµ s∩ ì processe≤ theφ bacδ int∩ thσ origina∞ CHUNK.BT┴ file« (Thi≤ assume≤ you≥ ì frienΣ someho≈ alread∙ haΣ GLUE¼ hi!)« Glueé i≤ smar⌠ enougΦ t∩ ignorσ BB╙ ì heade≥ line≤ o≥ prompt≤ tha⌠ ma∙ havσ becomσ embeddeΣ iε thσ chunδ file≤ s∩ ì hσ doesn'⌠ havσ t∩ worr∙ abou⌠ editinτ thi≤ stufµ out« Jus⌠ plug'n'play! Hσ woulΣ theε conver⌠ i⌠ bacδ int∩ aε AR├ filσ b∙ typing: ATO┬ CHUNK.BTA<CR> anΣ extrac⌠ thσ individua∞ file≤ b∙ typing: AR├ ┼ CHUNK<CR> S∩ therσ yo⌡ havσ it« Simplσ anΣ efficient« Yo⌡ caε automatσ thi≤ ì procedurσ witΦ simplσ batcΦ files. No≈ let≤ looδ bacδ abovσ fo≥ ß minute« Supposσ yo⌡ werσ goinτ t∩ transmi⌠ ì ove≥ ß poo≥ patΦ o≥ oε H╞ anΣ thu≤ wanteΣ smalle≥ chunδ files¼ sa∙ 2.5k« ì Thσ Chunké commanΣ linσ becomes: CHUN╦ CHUNK.BT┴ -S250░ or CHUN╦ -S250░ CHUNK.BTA Thσ ó-só o≥ "sizeó optioε tell≤ Chunké t∩ makσ 2.5δ file≤ insteaΣ oµ it'≤ ì defaul⌠ oµ 5k« Therσ i≤ ß somewha⌠ arbitrar∙ uppe≥ limi⌠ oµ 32k« Thi≤ i≤ ì primaril∙ fo≥ m∙ conveniencσ iε programminτ bu⌠ i⌠ shoulΣ no⌠ bσ ß problem« ì Afte≥ all¼ it'≤ no⌠ nicσ t∩ senΣ 32δ file≤ oε packetí Iµ yo⌡ specif∙ ß ì numbe≥ large≥ thaε 32k¼ Chunké wil∞ assumσ yo⌡ madσ aε erro≥ iε typinτ anΣ ì usσ thσ defaul⌠ oµ 5δ bytσ chunks« Chunké áha≤ aε optimize≥ buil⌠ iε whicΦ wil∞ eliminatσ ás∩-calleΣ ástraggle≥ ì files« á Straggler≤ ácontaiε onl∙ ß fe≈ byte≤ anΣ occu≥ wheε áthσ áorigina∞ ì filσ i≤ jus⌠ ß tin∙ bi⌠ large≥ thaε aε integra∞ numbe≥ oµ chunks« Usinτ áß ì chunksizσ oµ 5δ fo≥ example¼ ß filσ tha⌠ i≤ 2540░ byte≤ lonτ woulΣ creatσ ╢ ì chunks¼ áthσ las⌠ oµ whicΦ woulΣ contaiε onl∙ 40░ bytes« Wheε áChunké ásee≤ ì thi≤ ásituation¼ i⌠ adjust≤ thσ chunksizσ t∩ accommodatσ thσ byte≤ áiε áonσ ì les≤ chunkfile« S∩ iε thi≤ case¼ Chunké woulΣ makσ ╡ chunkfiles¼ eacΦ abou⌠ ì 5,08░ byte≤ long« Thσ algorithφ define≤ ß straggle≥ a≤ ß chunδ oµ datß 20Ñ ì o≥ les≤ oµ thσ sizσ oµ ß chunkfile« Thu≤ fo≥ ß chunksizσ oµ 100░ bytes¼ áß ì straggle≥ áfilσ woulΣ bσ onσ witΦ les≤ thaε 20░ byte≤ iε it« áThi≤ áfeaturσ ì wil∞ áreall∙ ácu⌠ ádowε áthσ traffiπ oε ß packe⌠ áchanne∞ ábecausσ áoµ áthσ ìèoverheaΣ involveΣ iε sendinτ ß message. III« OPTIONS CHUN╦ options Iε thσ examplσ above¼ thσ usσ oµ Chunké anΣ Glueé wa≤ simplσ anΣ ì straightforward« Therσ arσ severa∞ option≤ tha⌠ changσ thσ performancσ oµ ì botΦ Chunké anΣ Glue« You'vσ alread∙ seeε one¼ thσ -≤ optioε oε Chunk« ì We'l∞ looδ a⌠ Chunké first« Thσ completσ commanΣ linσ fo≥ Chunké is: CHUN╦ INFIL┼ █-SXXXX▌ █-B▌ █-Z▌ █-M] Thσ item≤ iε thσ squarσ bracket≤ arσ optional« I⌠ i≤ importan⌠ t∩ notσ ì tha⌠ thσ option≤ caε bσ specifieΣ iε an∙ order¼ anΣ beforσ o≥ afte≥ thσ ì INFIL┼ name« Thu≤ yo⌡ coulΣ type: CHUN╦ -S400░ INFIL┼ -B Let≤ looδ a⌠ eacΦ optioε iε sequence. é-╙ Option Yo⌡ arσ alread∙ familia≥ witΦ thσ é-sé option« Thi≤ specifie≤ ß chunkfilσ ì sizσ othe≥ thaε thσ defaul⌠ oµ 5k« Thi≤ specificatioε caε bσ u≡ t∩ 32,76╖ ì bytes« Iµ yo⌡ specif∙ ß chunkfilσ large≥ thaε 32,767¼ Chunké wil∞ assumσ ì yo⌡ madσ ß typinτ erro≥ anΣ usσ thσ defaul⌠ oµ 5k. é-┬ ª -┌ Option Thσ é-bé anΣ é-zé option≤ d∩ thσ samσ thing╗ the∙ arσ interchangeable« ì Normally¼ a≤ Chunké processe≤ ß file¼ i⌠ look≤ ou⌠ fo≥ contro∞-· character≤ ì iε thσ inpu⌠ file¼ anΣ iµ i⌠ find≤ any¼ i⌠ ZAP╙ theφ t∩ spaces« Why┐ ì Well¼ embeddeΣ contro∞-z'≤ royall∙ scre≈ u≡ packe⌠ bb≤ systems« Wheε thσ ì bb≤ see≤ ß contro∞-z¼ i⌠ simpl∙ think≤ tha⌠ thσ enΣ oµ messagσ ha≤ beeε ì reacheΣ anΣ stop≤ acceptinτ an∙ morσ data« Oµ course¼ anythinτ followinτ ì thσ firs⌠ contro∞-· i≤ lost¼ includinτ thσ foote≥ fo≥ CHUNK« BUT¼ therσ arσ time≤ yo⌡ ma∙ no⌠ wan⌠ t∩ Za≡ Zee's« Iµ yo⌡ arσ chunkinτ ß ì binar∙ filσ fo≥ transmissioε eithe≥ iε thσ transparen⌠ modσ oε packe⌠ o≥ ì viß phonσ modem¼ killinτ Zee'≤ i≤ no⌠ nice« S∩ aε optioε t∩ turε thi≤ ì killinτ modσ ofµ i≤ included« Thσ é-bé anΣ é-zé tel∞ Chunké NO╘ t∩ ZA╨ an∙ ì contro∞-┌ character≤ i⌠ find≤ iε thσ inpu⌠ filσ a≤ i⌠ processe≤ it« Yo⌡ ì caε thinδ oµ thi≤ a≤ eithe≥ beinτ ß (Z)appinτ Zee'≤ o≥ ß (B)inar∙ mode. Thσ Zeσ-Zappinτ modσ als∩ enable≤ onσ othe≥ feature« Thi≤ featurσ insure≤ ì tha⌠ carriagσ returε-linσ feeΣ pair≤ don'⌠ ge⌠ spli⌠ up« DO╙ anΣ CP/═ arσ ì somewha⌠ uniquσ iε tha⌠ line≤ oµ tex⌠ arσ endeΣ witΦ thσ ▓ characte≥ ì sequence¼ <CR╛-<LF>« BotΦ character≤ arσ necessar∙ anΣ iε thi≤ order« ì Othe≥ systems¼ sucΦ a≤ Uni° usσ onl∙ ß "newlineó characte≥ whicΦ i≤ als∩ ì calleΣ "linefeed"¼ samσ a≤ above« Thσ differencσ i≤ tha⌠ iε Unix¼ thσ ì printe≥ drive≥ take≤ carσ oµ makinτ surσ thσ printe≥ carriagσ i≤ returneΣ ì afte≥ eacΦ linσ a≤ wel∞ a≤ feedinτ thσ pape≥ t∩ thσ ne≈ line« Fo≥ DO╙ anΣ ì CP/M¼ wσ havσ t∩ explicitl∙ instruc⌠ thσ printe≥ t∩ returε thσ printheaΣ ì .pa èwitΦ ß <CR╛ anΣ theε feeΣ ß linσ witΦ thσ <LF>« Eveε thougΦ <CR╛ anΣ <LF╛ ì arσ tw∩ separatσ bytes¼ witΦ fe≈ exceptions¼ the∙ arσ alway≤ mateΣ a⌠ thσ ì enΣ oµ eacΦ linσ oµ text. Problem≤ star⌠ t∩ arisσ wheε wσ star⌠ chunkinτ files« Iµ aε odΣ chunksizσ ì i≤ specifieΣ witΦ ß filσ tha⌠ ha≤ predominatel∙ eveε number≤ oµ character≤ ì iε eacΦ line¼ i⌠ caε occu≥ tha⌠ thσ chunδ caε enΣ oε ß <CR╛ characte≥ anΣ ì it≤ companioε <LF╛ wil∞ enΣ u≡ a≤ thσ firs⌠ bytσ oµ thσ nex⌠ chunkfile« A⌠ thi≤ point¼ wσ don'⌠ havσ ß problem« Glueé assume≤ tha⌠ thσ chunk≤ arσ ì madσ u≡ oµ arbitrar∙ datß anΣ s∩ wil∞ matσ thσ erran⌠ <CR╛ anΣ <LF>« Thσ ì rea∞ probleφ occur≤ wheε wσ loaΣ thσ chunkfile≤ int∩ ß packe⌠ systeφ fo≥ ì transmission« Thσ BB╙ softwarσ look≤ fo≥ erran⌠ <CR>'≤ anΣ <LF>'≤ anΣ wheε ì i⌠ find≤ one¼ insert≤ it≤ mate« S∩ iε thσ firs⌠ chunkfile¼ ß <LF╛ woulΣ bσ ì addeΣ afte≥ thσ <CR╛ anΣ iε thσ seconΣ chunkfile¼ ß <CR╛ wil∞ bσ addeΣ ì beforσ thσ <LF>« Or¼ stateΣ anothe≥ way¼ thσ BB╙ ha≤ corrupteΣ thσ ì chunkfiles« GLUEé wil∞ noticσ thσ extrß ▓ byte≤ addeΣ anΣ complaiε loudly« ì AnΣ iµ thσ origina∞ chunkeΣ filσ wa≤ encodeΣ binar∙ froφ let≤ say¼ BTOA¼ ì theε thesσ addeΣ byte≤ wil∞ corrup⌠ thσ filσ wheε i⌠ i≤ uε-BTA'd« S∩ iµ Chunké i≤ iε thσ Zeσ-Zappinτ mode¼ i⌠ als∩ look≤ fo≥ ß <CR╛-<LF╛ ì sequencσ tha⌠ i≤ goinτ t∩ bσ split« Iµ i⌠ find≤ thi≤ occurrence¼ i⌠ goe≤ ì aheaΣ anΣ read≤ aε additiona∞ bytσ froφ thσ origina∞ filσ anΣ put≤ i⌠ iε ì thσ chunkfile« (Sortß thinδ oµ i⌠ a≤ ß marriagσ counselo≥ fo≥ data!⌐ I⌠ ì adjust≤ thσ bytecoun⌠ iε thσ chunkfilσ heade≥ accordingly« Chunké als∩ ì look≤ a⌠ thi≤ extrß byte¼ anΣ iµ i⌠ i≤ no⌠ ß <LF╛ character¼ Chunké ì complain≤ tha⌠ i⌠ ha≤ founΣ ß <CR╛ withou⌠ ß matinτ <LF╛ iε thσ inpu⌠ file« ì Whethe≥ o≥ no⌠ thi≤ i≤ ß probleφ wil∞ havσ t∩ bσ determineΣ b∙ you« Onσ ì thinτ i≤ fo≥ surσ though¼ thσ chunkfilσ witΦ thσ unmateΣ <CR╛ WIL╠ bσ ì corrupteΣ b∙ thσ packe⌠ BB╙ system. é-═ Option Thσ -═ optioε i≤ thσ Mem∩ option« Thi≤ optioε activate≤ ß smal∞ linσ ì edito≥ withiε Chunké whicΦ let≤ yo⌡ adΣ ß mem∩ o≥ notσ t∩ thσ beginninτ oµ ì thσ firs⌠ chunkfile« Glueé wil∞ displa∙ thi≤ mem∩ oε thσ screeε whilσ i⌠ i≤ ì puttinτ thσ chunkfile≤ bacδ togethe≥ again« Thi≤ i≤ ß ver∙ hand∙ featurσ ì tha⌠ wil∞ allo≈ yo⌡ t∩ identif∙ thσ content≤ oµ ASCI╔-EncodeΣ chunkfilσ t∩ ì thσ recipien⌠ o≥ placσ instruction≤ iε thσ chunkfilσ pertaininτ t∩ thσ ì contents« Wheε yo⌡ havσ entereΣ thσ Memo¼ typσ ß ^┌ t∩ enΣ it. Gluσ Options Glueé currentl∙ ha≤ ▓ commanΣ linσ options« Yo⌡ caε specif∙ aε optiona∞ ì namσ t∩ bσ useΣ fo≥ thσ outpu⌠ filσ anΣ yo⌡ caε specif∙ ß querieΣ ignorσ ì optioε fo≥ errors« Thσ commanΣ linσ woulΣ be: GLU┼ CHUNKFI╠ [OUTFILE▌ █-i] Chunké store≤ thσ origina∞ file'≤ namσ iε thσ heade≥ oµ eacΦ chunkfilσ anΣ ì thi≤ namσ i≤ normall∙ useΣ b∙ Glueé fo≥ it≤ outpu⌠ filename« Iµ yo⌡ specif∙ ì aε outpu⌠ filσ namσ however¼ tha⌠ namσ wil∞ overridσ thσ namσ iε thσ ì chunkfilσ header« S∩ iµ yo⌡ typσ thσ command: èGLU┼ CHKNGLU┼ GLUE.DOC Glueé woulΣ combinσ CHKNGLUE.CHA¼ CHKNGLUE.CHB¼ etπ int∩ onσ file¼ bu⌠ ì insteaΣ oµ usinτ thσ namσ iε thσ heade≥ line¼ i⌠ woulΣ cal∞ thσ outpu⌠ filσ ì GLUE.DOC. é-╔ Option Iµ yo⌡ specif∙ thσ -Θ option¼ tellinτ GLUEé t∩ selectivel∙ ignorσ certaiε ì erro≥ conditions¼ thσ prograφ wil∞ notif∙ yo⌡ oµ an∙ error≤ i⌠ encounter≤ ì anΣ givσ yo⌡ thσ optioε oµ ignorinτ them« Thi≤ i≤ especiall∙ usefu∞ wheε ß ì chunkfilσ se⌠ ha≤ beeε corrupted¼ perhap≤ b∙ ß "**¬ CONNEC╘ REQUESTó froφ ì thσ tnπ o≥ froφ thσ <CR╛-<LF╛ probleφ mentioneΣ above« Iµ thσ origina∞ ì filσ wa≤ plaintext¼ ofteε time≤ thσ corruptioε caε bσ ignoreΣ o≥ caε bσ ì morσ easil∙ fixeΣ witΦ aε edito≥ afte≥ Glueé i≤ finisheΣ processing« Iε ì thesσ cases¼ GLUEé wil∞ generatσ aε erro≥ messagσ anΣ theε asδ yo⌡ whethe≥ ì t∩ qui⌠ o≥ ignorσ thσ error« Iµ yo⌡ choosσ t∩ ignorσ thσ error¼ GLUEé wil∞ ì d∩ it≤ bes⌠ t∩ finisΦ processinτ thσ chunkfile≤ anΣ theε providσ yo⌡ witΦ ß ì morσ detaileΣ erro≥ analysi≤ regardinτ thσ erro≥ condition« Iµ BTO┴ o≥ PA╦ ì chunkfile≤ arσ beinτ processed¼ obviou≤ error≤ sucΦ a≤ thσ **¬ Connec⌠ ì Reques⌠ message≤ caε als∩ bσ fixeΣ manually¼ bu⌠ carσ mus⌠ bσ takeε t∩ ì eliminatσ al∞ extrß <CR╛-<LF╛ sequence≤ also« Thσ -Θ optioε i≤ NO╘ ì recommendeΣ fo≥ binar∙ files. IV« Othe≥ Features ┴ ne≈ featurσ startinτ witΦ V1.│ i≤ thσ s∩ calleΣ "straggle≥ fileó ì eliminatioε algorithm« ┴ straggle≥ filσ i≤ onσ tha⌠ contain≤ onl∙ ß fe≈ ì byte≤ oµ data« Fo≥ example¼ supposσ yo⌡ haΣ ß filσ t∩ transmi⌠ tha⌠ i≤ ì 25,10░ byte≤ long« Beforσ now¼ Chunké woulΣ havσ madσ ╢ chunkfiles¼ ╡ oµ ì whicΦ woulΣ contaiε 500░ byte≤ oµ datß anΣ thσ las⌠ whicΦ woulΣ contaiε ì onl∙ 10░ byte≤ ¡ thσ stragglerí Sincσ therσ i≤ ß largσ overheaΣ involveΣ ì iε an∙ packe⌠ messagσ o≥ filσ transfer¼ ╔ decideΣ t∩ ge⌠ riΣ oµ thσ ì straggler« Wha⌠ Chunké doe≤ i≤ looδ a⌠ thσ straggle≥ anΣ iµ it'≤ goinτ t∩ ì bσ les≤ thaε 50░ bytes¼ thσ size≤ oµ thσ othe≥ chunkfile≤ arσ enlargeΣ ì enougΦ t∩ contaiε thσ straggler« Thus¼ Chunké woulΣ no≈ makσ onl∙ ╡ ì chunkfile≤ anΣ eacΦ woulΣ contaiε abou⌠ 502░ bytes. V« Thσ CHUN╦ filσ format. Iµ yo⌡ looδ a⌠ thσ firs⌠ chunδ file¼ CHUNK.CHA¼ yo⌡ wil∞ seσ somethinτ likσ ì this: This file CHUNKed by the WD4OQC CHUNK'r ~~~ FcHuNk WD4OQ├ Vers 1.5 File A of E, chunk.bta 1000░ 47325 xbtoa Begin chunk.arc )@/]$<DH0ez!!!!g!!!".%SN8"?=Ns8!":L"\9K5fNK+2M5X7Z_B$M5),ZO+qLi<ck3c<LW/>toZ!K .dPNhNBOA4@AHn<E/Cl/TaH"P"Xea<jVN&16"&<'V'7#X_-_:.m3,z!!(+N!!$L=r)*n"`uY3\$nkS morσ data... .pa èmorσ data..« (10δ worth)... 6j743*@pD;@j#qciG\L!IM=?n1Xk5!,+=d%uF,jMdQuEE",F$#Z]dn=HE\i0FUk["Z%81*ZtVa!$5? Q!15SJ%H%q7U(@:n!Eu]2EqX??Fb-"#%j[N\XM=q][LYK^!-E/j4O=/"O ~~~ EnDfChUnK Vers 1.5 ┴ buncΦ oµ gobbledygookí Let≤ looδ morσ closely« Thσ firs⌠ linσ i≤ ß braτ ì linσ tha⌠ essentiall∙ doe≤ nothinτ excep⌠ positivel∙ identif∙ t∩ human≤ thσ ì sourcσ anΣ typσ oµ thσ file« Thσ seconΣ linσ i≤ wha⌠ wσ cal∞ ß "tokenó o≥ ì heade≥ line« I⌠ serve≤ ▓ purposes« Onσ i≤ t∩ positivel∙ marδ wherσ thσ ì datß starts« Second¼ i⌠ contain≤ vita∞ datß needeΣ b∙ Glue¼ sucΦ a≤ thσ ì origina∞ file'≤ namσ anΣ ho≈ man∙ file≤ arσ iε thi≤ set« EacΦ bi⌠ oµ tex⌠ ì separateΣ b∙ ß spacσ i≤ calleΣ ß field« Let≤ looδ a⌠ theφ morσ closely. .RR L----!----!----!----!----!----!----!----!------------------R ~~~ Thσ triplσ tildσ string« Thi≤ i≤ ß uniquσ marke≥ useΣ b∙ ì áááááááááááááááGlueé t∩ figurσ ou⌠ wherσ thσ heade≥ begins« Sincσ thσ tildσ ì ááááááááááááááái≤ ß rarσ characte≥ iε thσ EnglisΦ language¼ mos⌠ likel∙ it≤ ì áááááááááááááááoccurrencσ iε ß filσ wil∞ marδ ß header. FcHuNk Thi≤ fielΣ identifie≤ thσ datafilσ a≤ cominτ froφ chunk« I⌠ ì ááááááááááááááái≤ highl∙ desirablσ tha⌠ ß heade≥ linσ contaiε highl∙ uniquσ ì ááááááááááááááádatß iε orde≥ t∩ simplif∙ recognition« Thu≤ thσ alternatσ ì áááááááááááááááuppe≥ anΣ lowe≥ casσ letters« WD4OQC M∙ call¼ t∩ identif∙ thσ autho≥ iε thσ even⌠ someonσ canno⌠ ì áááááááááááááááfinΣ ou⌠ what'≤ makinτ thosσ funn∙ file≤ anΣ want≤ t∩ looδ ì ááááááááááááááámσ u≡ iε thσ callbook. Vers 1.5 Curren⌠ versioε number« Generall∙ expec⌠ file≤ generateΣ ì áááááááááááááááwitΦ prσ¡ versioε 1.│ t∩ bσ incompatiblσ witΦ newe≥ ones¼ ì ááááááááááááááásincσ thσ majo≥ reasoε fo≥ upgrade≤ i≤ t∩ fi° deficiencie≤ ì áááááááááááááááiε thσ program« Looδ t∩ thσ releasσ notes¼ CHANGES.CNG¼ fo≥ ì ááááááááááááááádetails« Mino≥ change≤ t∩ olΣ chunδ file≤ caε bσ madσ witΦ ì áááááááááááááááaε editor« Majo≥ change≤ wil∞ probabl∙ bσ supplieΣ witΦ ß ì áááááááááááááááconversioε program. File A of E, Thi≤ fielΣ tell≤ GLU┼ first¼ whicΦ filσ iε sequencσ i⌠ i≤ ì ááááááááááááááádealinτ witΦ anΣ second¼ ho≈ man∙ tota∞ file≤ therσ are« ì áááááááááááááááThσ numberinτ sequencσ i≤ ┴ througΦ ┌ fo≥ ß tota∞ oµ 2╡ ì ááááááááááááááápossiblσ files« Thu≤ witΦ ß limi⌠ oµ 2╡ chunkfile≤ a⌠ ß ì ááááááááááááááámaximuφ sizσ oµ 32δ each¼ yo⌡ caε chunδ file≤ ove≥ 800k! chunk.bta Thi≤ i≤ thσ namσ oµ thσ origina∞ filσ tha⌠ wa≤ chunked« ì áááááááááááááááThi≤ filσ i≤ recreateΣ b∙ GLUE. 10000 Thi≤ i≤ thσ exac⌠ sizσ iε byte≤ oµ thσ datß areß iε thσ ì áááááááááááááááchunδ file¼ ie¼ thσ datß betweeε thσ heade≥ tokeε anΣ thσ ì áááááááááááááááfoote≥ token« Thi≤ coun⌠ i≤ EXAC╘ anΣ exclude≤ thσ C╥-L╞ ì ááááááááááááááásequencσ CHUNKé place≤ afte≥ thσ heade≥ linσ anΣ beforσ thσ ì áááááááááááááááfoote≥ line« Thesσ are¼ oµ course¼ strippeΣ ou⌠ b∙ GLUE. .pa è47325 Thi≤ i≤ thσ exac⌠ filσ sizσ oµ thσ origina∞ filσ iε bytes« ì áááááááááááááááThi≤ numbe≥ i≤ useΣ a≤ aε extrß erro≥ checδ t∩ insurσ thσ ì áááááááááááááááGLUE'Σ filσ i≤ thσ samσ a≤ thσ onσ tha⌠ wa≤ CHUNK'd. <CR><LF> Thσ C╥-L╞ sequencσ end≤ thσ heade≥ line« Thσ NEX╘ bytσ i≤ ì áááááááááááááááthσ firs⌠ bytσ oµ thσ datß area. .RR--!----!----!----!----!----!----!----!----!----!----!------------------R Thσ nex⌠ line¼ "xbtoß Begiε chunk.arcó als∩ look≤ suspiciousl∙ likσ ß ì heade≥ anΣ i⌠ isí Bu⌠ it'≤ thσ heade≥ oµ thσ chunkeΣ filσ itself¼ iε BT┴ ì format« It'≤ als∩ thσ firs⌠ datß iε thσ chunδ file. Lookinτ a⌠ thσ enΣ oµ thσ chunkfile¼ wσ seσ thσ line: ~~~ EnDfChUnK Vers 1.5 Thi≤ i≤ thσ foote≥ oµ thσ chunkfilσ tha⌠ tell≤ GLUEé exactl∙ wherσ t∩ sto≡ ì anΣ t∩ ignorσ an∙ character≤ tha⌠ ma∙ follo≈ it« Character≤ sucΦ a≤ thσ ì BB╙ promp⌠ followinτ ß downloaΣ froφ thσ BBS. VI. ERRO╥ MESSAGES Chunké anΣ Glueé providσ ß widσ variet∙ oµ erro≥ message≤ t∩ inforφ yo⌡ oµ ì wha⌠ i≤ happeninτ o≥ wha⌠ happeneΣ t∩ causσ failure« Mos⌠ arσ selµ-ì explanator∙ anΣ al∞ arσ listeΣ below. CHUN╦ Erro≥ Messages ¡ *** WARNING - Bad chunksize - Using 5,000 bytes ¡ **¬ WARNIN╟ ¡ BaΣ Optioε oε commanΣ linσ ¡ ° ¡ Ignored. ¡ **¬ WARNIN╟ ¡ SpecifieΣ chunksizσ ╛ 3276╖ byte≤ ¡ usinτ 5,00░ bytes. - *** WARNING - A <CR> without a <LF> was found at the end of chunk X. 0« --- N∩ error≤ encountered¼ OK. 1« *** ERROR - File name must be specified on command line 2« *** ERROR - Not enough ram to proceed. - Exiting ... 3« *** ERROR - Filename xxx not found",infilenamσ ¡ Exiting ... 4« *** ERROR - Can't open xxx - Disk full?? - Exiting ... 5« **¬ ERRO╥ ¡ Erro≥ Writinτ filσ xx° ¡ Disδ full??┐ ¡ Exitinτ ... 6« *** ERROR - Chunksize selected will result in too many files - Increase"); chunksize and try again - Exiting ... 7« *** ERROR - *deleted¬ v1.│ ¡ no⌠ useΣ iε thi≤ version. 8« **¬ ERRO╥ ¡ Writteε Byte≤ no⌠ equa∞ t∩ reaΣ bytes. Thσ numbe≥ ou⌠ t∩ thσ sidσ oµ eacΦ erro≥ i≤ thσ EXI╘ COD┼ Chunké return≤ t∩ ì DO╙ wheε i⌠ exits« Yo⌡ caε makσ usσ oµ thesσ erro≥ code≤ iε DO╙ batcΦ ì file≤ througΦ thσ ERRORLEVE╠ statemen⌠ t∩ d∩ differen⌠ thing≤ accordinτ t∩ ì wha⌠ wen⌠ wrong. .pa èGLU┼ Erro≥ Messages 1. *** ERROR - File name must be specified on command line"); 2« *** ERROR - Not enough ram to proceed. - Exiting ... 3« *** ERROR - First chunkfile, xx not founΣ ¡ Exitinτ ... 3« *** ERROR - Chunkfile xx not founΣ ¡ Exitinτ ... 4« *** ERROR - Can't open output file xxx - Disk full??┐ 5« *** ERROR - Writing file xxx - Disk full??? - exitinτ ... 6« *** ERROR - Opening header not found - Maybe not a CHUNK file? - Exiting ... 7« *** ERROR - BAD option - exiting ... 8« *** ERROR - Invalid Beginning token found - Exiting ... 9« **¬ ERRO╥ ¡ Chunkfilσ corrupteΣ ¡ Filσ i≤ to∩ short 10.**¬ ERRO╥ ¡ Chunkfilσ corrupteΣ ¡ Filσ i≤ to∩ long. 11.**¬ ERRO╥ ¡ Actua∞ filσ sizσ differen⌠ thaε heade≥ filσ size. VII. WHA╘ CA╬ G╧ WRONG Thσ threσ mos⌠ commoε problem≤ wil∞ be: 1. Chunkfilσ to∩ lonτ corruption 2. Foote≥ missing 3. Extraneou≤ ^z's. .RR L----!----!----!----!----!----!----!----!----!----!------------------R 1. Chunkfilσ to∩ lonτ corruptioε ¡ Thσ mos⌠ commoε causσ oµ thi≤ erro≥ i≤ ì áááááß connec⌠ reques⌠ cominτ int∩ you≥ statioε whilσ yo⌡ arσ downloadinτ ß ì áááááfile« I⌠ wil∞ consis⌠ oµ thσ linσ "**¬ connec⌠ request║ wd4xxx"« ì áááááSincσ therσ i≤ n∩ wa∙ t∩ suppres≤ thi≤ effect¼ yo⌡ shoulΣ occasionall∙ ì áááááexpec⌠ it¼ especiall∙ if¼ fo≥ somσ reason¼ your≤ i≤ ß popula≥ statioε ì ááááát∩ connec⌠ to« (┴ gooΣ storσ oµ dirt∙ joke≤ oε disk¼ fer'instance.⌐ ì áááááThσ easies⌠ solutioε i≤ t∩ usσ you≥ edito≥ t∩ finΣ thσ offendinτ ì ááááástrinτ anΣ deletσ it« CAUTION║ yo⌡ MUS╘ bσ exac⌠ iε you≥ deletion≤ ì áááááincludinτ <CR><LF╛ sequences« Oε PAK'Σ anΣ BTOA'Σ file≤ thi≤ i≤ easy¼ ì ááááásincσ eacΦ linσ wil∞ bσ exactl∙ thσ samσ length« Iε general¼ expec⌠ ì ááááát∩ havσ t∩ deletσ thσ strinτ anΣ onσ <CR><LF╛ sequence. 2. Foote≥ Missinτ ¡ Thi≤ wil∞ mos⌠ likel∙ happeε iε thσ las⌠ chunkfilσ iµ ì áááááthσ origina∞ filσ haΣ ß ^· EO╞ marke≥ a⌠ it≤ end« CHUNKé processe≤ ß ì áááááfilσ int∩ chunkfile≤ EXACTL┘ ¡ I⌠ doe≤ n∩ filterinτ oµ an∙ kind« Thu≤ ì áááááthσ ^┌ get≤ passeΣ througΦ likσ an∙ othe≥ data« Thσ ^· WIL╠ terminatσ ì áááááthσ filσ wheε i⌠ i≤ uploadeΣ t∩ thσ BB╙ o≥ iµ aε edito≥ likσ WordStar¼ ì áááááwhicΦ responΣ t∩ ^z¼ i≤ used« Thσ solutioε i≤ generall∙ simple« ì áááááGenerall∙ n∩ datß i≤ actuall∙ los⌠ s∩ thσ foote≥ shoulΣ bσ addeΣ ì ááááámanuall∙ witΦ aε editor« Sincσ thσ ^· wa≤ representeΣ iε thσ bytσ ì ááááácoun⌠ storeΣ iε thσ header¼ yo⌡ wil∞ havσ t∩ pu⌠ ß spacσ a⌠ thσ enΣ oµ ì áááááthσ las⌠ linσ beforσ thσ foote≥ t∩ makσ u≡ fo≥ thi≤ byte« Usσ thσ ì áááááZeσ-Zappinτ Chunké optioε t∩ insurσ thi≤ i≤ no⌠ ß problem« .pa è3. Extraneou≤ ^z'≤ ¡ Simila≥ t∩ thσ abovσ probleφ excep⌠ tha⌠ iµ ß ^· ì áááááget≤ embeddeΣ iε thσ datß a⌠ othe≥ thaε thσ enΣ anΣ thσ chunkfile≤ arσ ì áááááhandleΣ b∙ BBS¼ al∞ followinτ datß iε tha⌠ filσ wil∞ bσ lost« Somσ ì áááááeditors¼ sucΦ a≤ P├-WRITE¼ wil∞ allo≈ yo⌡ t∩ pu⌠ ß ^┌ anywherσ iε ß ì ááááádatafilσ b∙ keyinτ AL╘-26« P├-WRIT┼ anΣ Chunké ignorσ thσ ^┌ bu⌠ thσ ì áááááBB╙ doe≤ not!!!í Thσ onl∙ rea∞ solutioε i≤ t∩ havσ thσ sende≥ rechunδ ì áááááthσ origina∞ filσ anΣ rσ-senΣ thσ offendeΣ onσ AN─ al∞ subsequen⌠ ì áááááones« Oµ course¼ thσ Zeσ-Zappinτ Chunké optioε wil∞ eliminatσ thi≤ ì áááááproblem. .RR--!----!----!----!----!----!----!----!----!----!----!------------------R VIII. OTHE╥ USES ThougΦ CHUNKé wa≤ originall∙ writteε fo≥ usσ oε Amateu≥ Packe⌠ radio¼ i⌠ ha≤ ì man∙ othe≥ uses« Somσ arσ outlineΣ below. 1. Binar∙ files CHUNKé handle≤ binar∙ datß witΦ thσ samσ easσ a≤ tex⌠ ¡ a⌠ leas⌠ iε thσ DO╙ ì environment« (Thi≤ ma∙ no⌠ bσ strictl∙ truσ oε sucΦ system≤ a≤ CP/═ whicΦ ì usσ ß specia∞ bytσ t∩ signa∞ EOF.⌐ S∩ i⌠ caε bσ useΣ t∩ chunδ binar∙ file≤ ì a≤ wel∞ a≤ text« Wh∙ woulΣ yo⌡ wan⌠ t∩ d∩ this┐ Well¼ conside≥ onσ oµ m∙ experiences« I'vσ collecteΣ ß fe≈ game≤ fo≥ thσ ì PC ove≥ thσ years« I'vσ kep⌠ theφ iε ß singlσ AR├ filσ oε m∙ harΣ disk« ì Thi≤ AR├ ha≤ growε unti∞ i⌠ no≈ approache≤ 800kí Sincσ i⌠ wa≤ takinτ u≡ ß ì largσ amoun⌠ oµ disδ space¼ ╔ wanteΣ t∩ ofµ-loaΣ i⌠ t∩ floppies« Bu⌠ it'≤ ì to∩ biτ fo≥ onσ floppy« CHUNKé t∩ thσ rescue« ╔ simpl∙ chunkeΣ thσ AR├ ì int∩ 32δ chunk≤ anΣ copieΣ theφ t∩ floppies« Thi≤ i≤ ß ver∙ efficien⌠ ì method¼ a≤ i⌠ wil∞ wastσ a⌠ most¼ <32δ oµ flopp∙ space« Wheε ╔ wan⌠ t∩ ì recove≥ thσ AR├ file¼ ╔ simpl∙ cop∙ al∞ thσ chunδ file≤ ove≥ t∩ thσ harΣ ì disδ anΣ le⌠ GLU┼ pu⌠ 'eφ bacδ togethe≥ again. 2. Phonσ Modeφ Operations Anothe≥ usσ i≤ iε phonσ modeφ operation« Sa∙ ╔ wanteΣ t∩ transfe≥ tha⌠ ì samσ gamσ AR├ filσ t∩ ß frienΣ oµ mine« ╔ COUL─ senΣ thσ filσ iε onσ piecσ ì usinτ XMODE═ o≥ whatever« Thi≤ i≤ inadvisablσ fo≥ severa∞ reasons« First¼ ì ╔ reall∙ woulΣ no⌠ wan⌠ m∙ phonσ tieΣ u≡ fo≥ hours« Second¼ XMODE═ caε bσ ì crasheΣ b∙ noisσ o≥ poo≥ linσ conditions« Iµ i⌠ crasheΣ 700δ int∩ thσ ì transfer¼ it'Σ bσ somethinτ t∩ cr∙ aboutí I⌠ i≤ mucΦ bette≥ t∩ CHUNKé thσ ì filσ anΣ senΣ thσ piece≤ ß grou≡ a⌠ ß time« Iµ yo⌡ wanteΣ t∩ limi⌠ ì yourselµ t∩ perhap≤ aε hou≥ pe≥ night¼ i⌠ woulΣ takσ severa∞ night≤ bu⌠ yo⌡ ì woulΣ eventuall∙ ge⌠ theφ al∞ sent« AnΣ iµ thσ transfe≥ crashes¼ a⌠ mos⌠ ì onσ filσ woulΣ havσ t∩ bσ resent. Ye⌠ ß thirΣ usσ i≤ oε CompuServ« Let≤ supposσ you'vσ jus⌠ completeΣ aε ì expositor∙ essa∙ oε wh∙ programmer≤ tha⌠ releasσ publiπ domaiε softwarσ ì withou⌠ sourcσ arσ sucΦ hairballs« Thi≤ coulΣ easil∙ ruε 30δ o≥ more« ì Probleφ i≤ tha⌠ thσ messagσ sectioε oµ mos⌠ service≤ sucΦ a≤ CompuSer÷ havσ ì ß limi⌠ oµ perhap≤ 2δ oε messages« Yo⌡ realizσ tha⌠ iµ yo⌡ uploaΣ you≥ ì worδ oµ ar⌠ a≤ ß file¼ i⌠ wil∞ probabl∙ bσ ignored« CHUNKé t∩ thσ rescue« ì Simpl∙ CHUNKé you≥ tex⌠ filσ into¼ sa∙ 180░ bytσ chunk≤ anΣ uploaΣ theφ ì .pa èsequentially« Titlσ you≥ message≤ appropriately¼ sa∙ "Hairballs¼ ▒ oµ 20"« ì Froφ thσ reader'≤ poin⌠ oµ view¼ hσ caε reaΣ eacΦ messagσ sequentially¼ ì ignorinτ thσ CHUNKé header≤ o≥ hσ caε capturσ theφ al∞ anΣ GLUEé theφ bacδ ì togethe≥ fo≥ readinτ o≥ printing« NEET¼ huh? IX PATCHIN╟ CHUN╦ OPTIONS Chunké i≤ shippeΣ se⌠ u≡ s∩ tha⌠ thσ Zeσ-Zappinτ optioε default≤ O╬ anΣ thσ ì Mem∩ optioε default≤ OFF« S∩ thσ commanΣ linσ optioε -┌ turn≤ Zeσ-Zappinτ ì OFFé anΣ thσ -═ optioε turn≤ thσ mem∩ fielΣ ON« Thi≤ shoulΣ bσ thσ wa∙ mos⌠ ì peoplσ usσ thσ prograφ unde≥ norma∞ condition≤ fo≥ Packe⌠ radio« Mos⌠ ì chunkfile≤ wil∞ no⌠ neeΣ ß mem∩ field¼ s∩ thi≤ i≤ off« However¼ iµ thesσ ▓ ì default≤ arσ no⌠ convenient¼ Chunké ha≤ provision≤ fo≥ patchinτ theφ t∩ thσ ì oppositσ state. Thσ simples⌠ wa∙ t∩ changσ defaul⌠ state≤ i≤ t∩ changσ thσ flaτ iε thσ ├ ì sourcσ codσ filσ anΣ rσ-compile« However¼ iε thσ even⌠ yo⌡ don'⌠ havσ ß ì professiona∞ ├ compiler¼ yo⌡ caε usσ ß secto≥ edito≥ sucΦ a≤ thσ Nortoε ì Utilitie≤ o≥ thσ publiπ domaiε PATC╚ prograφ (included⌐ t∩ effec⌠ thσ ì change« A⌠ thi≤ poin⌠ ╔ mus⌠ warε yo⌡ tha⌠ thi≤ typσ patchinτ require≤ tha⌠ yo⌡ bσ ì familia≥ witΦ patchinτ iε genera∞ anΣ als∩ familia≥ witΦ you≥ patchinτ ì program« Iε particular¼ iµ yo⌡ usσ thσ DO╙ DEBU╟ program¼ usσ extremσ ì caution« DEBU╟ caε alte≥ an∙ arbitrar∙ secto≥ oε you≥ disδ anΣ wil∞ d∩ s∩ ì withou⌠ warninτ o≥ confirmation. Thσ majo≥ probleφ iε patchinτ ├ program≤ a⌠ thσ executablσ filσ leve∞ i≤ ì findinτ thσ righ⌠ placσ t∩ patch« Thσ compile≥ anΣ linke≥ caε pu⌠ thσ ì patcΦ areß a⌠ an∙ arbitrar∙ placσ iε thσ .EX┼ file« Thσ Microsof⌠ ├ v4.░ ì compile≥ put≤ al∞ initializeΣ variable≤ nea≥ thσ enΣ oµ thσ .EX┼ file« T∩ ì facilitatσ findinτ thσ patcΦ area¼ I'vσ defineΣ ß couplσ oµ patcΦ FLA╟ ì label≤ tha⌠ wil∞ sho≈ u≡ wheε yo⌡ perusσ thσ binar∙ data« Thesσ ▓ flag≤ ì arσ ZAPFLAGé anΣ MEMOFLAG« Thesσ ▓ word≤ wil∞ appea≥ iε thσ binar∙ datß ì immediatel∙ BEFOR┼ thσ patcΦ bytes« AnΣ remembe≥ tha⌠ thσ strinτ wil∞ bσ ì terminateΣ witΦ ß ░ s∩ thσ actua∞ patcΦ areß start≤ AFTE╥ thσ 0« BotΦ ì flag≤ arσ storeΣ a≤ ▓ bytσ integer≤ witΦ 0░ 0░ beinτ falsσ anΣ 0▒ 0░ beinτ ì true« A⌠ leas⌠ iε thσ 808╢ world¼ thσ byte≤ arσ storeΣ LS┬ first¼ s∩ thσ ì FIRS╘ bytσ i≤ thσ onσ t∩ change« Simpl∙ changσ thσ 0░ t∩ ß 0▒ o≥ ß 0▒ t∩ ß ì 00. ╔ canno⌠ givσ yo⌡ ß morσ detaileΣ instructioε oε patchinτ becausσ therσ arσ ì ß myriaΣ oµ patchinτ tool≤ availablσ anΣ al∞ arσ different« Sincσ CHUNKé ì wil∞ tel∞ yo⌡ wha⌠ i⌠ i≤ doing¼ ß simplσ tes⌠ wil∞ verif∙ thσ correctnes≤ ì oµ thσ patching. Aε importan⌠ note« Thσ -┌ anΣ -═ option≤ oε thσ commanΣ linσ actua∞ TOGGL┼ ì thσ statσ oµ thσ option« Fo≥ example¼ thσ Zeσ-Zappinτ modσ i≤ shippeΣ ì defaultinτ O╬ s∩ ß -┌ wil∞ togglσ i⌠ OFF« Iµ yo⌡ patcΦ CHUNKé s∩ tha⌠ Zeσ-ì Zappinτ default≤ OFF¼ thσ -┌ optioε wil∞ togglσ i⌠ OFF« Samσ fo≥ thσ Mem∩ ì option« Thi≤ i≤ ver∙ importan⌠ t∩ understand« .pa èIµ yo⌡ typσ CHUNKé oε thσ commanΣ linσ withou⌠ ß filenamσ argument¼ CHUNKé ì wil∞ givσ yo⌡ ß shor⌠ hel≡ screeε anΣ exit« Thi≤ hel≡ screeε wil∞ indicatσ ì thσ actioε oµ al∞ option≤ anΣ wil∞ reflec⌠ an∙ patching« S∩ iµ yo⌡ ge⌠ ì los⌠ o≥ forge⌠ wha⌠ thσ default≤ are¼ simpl∙ typσ CHUNKé anΣ looδ a⌠ thσ ì hel≡ message. X AVAILABILITY¼ SOURCE¼ ETC. CHUNK'N'GLU┼ i≤ availablσ directl∙ froφ mσ at: Johε G« Dσ ArmonΣ WD4OQC p∩ bo° 3657 Cleveland¼ T╬ 37311 I⌠ i≤ shippeΣ completσ witΦ ├ sourcσ code¼ DO├ files¼ ß buτ list¼ anΣ ì Microsof⌠ MAK┼ files.Iµ you'Σ likσ ß copy¼ senΣ mσ │ things: 1. ┴ε IB═ DSD─ formatteΣ disδ ¡ 360δ 5". 2« ┴ reusablσ disδ maile≥ witΦ returε addres≤ labels 3. Enuµ postagσ t∩ cove≥ it'≤ return. Al∞ │ mus⌠ bσ included« Sincσ I'φ givinτ thi≤ prograφ se⌠ away¼ ╔ WIL╠ NOTé ì g∩ t∩ an∙ extrß troublσ t∩ fi° u≡ you≥ FUBARS« Iµ al∞ threσ item≤ arσ no⌠ ì included¼ I'l∞ simpl∙ adΣ wha⌠ yo⌡ DI─ senΣ t∩ m∙ use≥-donateΣ collectioε ì anΣ bσ donσ witΦ it« If¼ wheε yo⌡ senΣ mσ ß disk¼ you'l∞ senΣ ß littlσ notσ tellinτ mσ yo⌡ arσ ì interested¼ I'l∞ includσ ß cop∙ oµ PAK¼ BTOA¼ BS╤ anΣ s∩ on« Thesσ tool≤ ì shoulΣ reall∙ bσ iε an∙ professiona∞ packeteer'≤ toolkit! ╔ don'⌠ likσ thσ concep⌠ oµ BEGwarσ (ShareWarσ t∩ some⌐ fo≥ sucΦ simplσ ì utilities¼ bu⌠ iµ yo⌡ werσ t∩ includσ ß smal∞ contributioε sufficien⌠ t∩ a⌠ ì leas⌠ cove≥ futurσ mailings¼ I'Σ bσ mos⌠ inclineΣ t∩ pu⌠ yo⌡ oε m∙ mailinτ ì lis⌠ áfo≥ áfuturσ updates¼ packe⌠ goodie≤ anΣ thσ like« (╔ ádidn'⌠ áreall∙ ì wan⌠ t∩ pu⌠ thi≤ iε bu⌠ m∙ friend≤ havσ tolΣ mσ thσ prograφ i≤ gooΣ enuµ t∩ ì deservσ somσ kinΣ oµ compensation.⌐ $10.0░ suggested. I'l∞ pos⌠ thi≤ se⌠ oε a≤ man∙ phonσ BB╙ set≤ a≤ possible« ╔ don'⌠ havσ an∙ ì iε minΣ a⌠ thσ moment¼ s∩ nonσ arσ listed« ╔ aφ no⌠ currentl∙ oε ì CompuServ¼ sincσ ou≥ backwate≥ littlσ towε doe≤ no⌠ havσ ß Tymne⌠ nodσ anΣ ì ╔ won'⌠ pa∙ thσ buzzard≤ connec⌠ charge≤ AN─ lonτ distance« Iµ anyonσ ì want≤ t∩ uploaΣ thi≤ t∩ Compuserv¼ fee∞ freσ t∩ d∩ so. Thi≤ prograφ se⌠ i≤ copywriteΣ b∙ meí Yo⌡ ma∙ usσ them¼ hacδ them¼ givσ ì theφ away¼ usσ theφ iε you≥ business¼ o≥ makσ ß zillioε copie≤ t∩ you≥ ì heartsº delite« Yo⌡ ma∙ NOT: .RR L----!----!----!----!----!----!----!----!----!----!------------------R 1. Sel∞ thi≤ prograφ ¡ Thi≤ include≤ charginτ fo≥ copying¼ othe≥ thaε ì ááááámediß costs. 2. Distributσ modifieΣ version≤ usinτ thσ name≤ CHUNK¼ GLUEé o≥ ì áááááCHUNK'N'GLUE. 3. Changσ revisioε number≤ anΣ theε rσ-releasσ thσ program≤ t∩ thσ publiπ ì ááááádomain« PLEASE..« I'φ willinτ t∩ handlσ thσ drudger∙ oµ maintaininτ ì .pa èáááááorderl∙ revisions« Jus⌠ senΣ you≥ enhancement≤ t∩ mσ anΣ I'l∞ takσ i⌠ ì áááááfroφ thereí .RR--!----!----!----!----!----!----!----!----!----!----!------------------R Sourcσ codσ iε Microsof⌠ ├ v4.░ i≤ includeΣ (Onl∙ ß Trol∞ woulΣ d∩ ì otherwise!)¼ yo⌡ shoulΣ fee∞ freσ t∩ embellisΦ it« Iµ yo⌡ comσ u≡ witΦ ì enhancements¼ bugfixe≤ o≥ thσ like¼ pleasσ senΣ theφ t∩ mσ eithe≥ b∙ U╙ ì SNAI╠ a⌠ thσ abovσ addres≤ o≥ viß packe⌠ radi∩ └ WD4OQ├ BBS« I'l∞ ì incorporatσ thσ change≤ int∩ aε officia∞ update. X╔ OTHE╥ MACHINES. Thi≤ codσ wa≤ writteε fo≥ thσ MicroSof⌠ ├ V4.░ compile≥ unde≥ M╙-DOS« ì Therσ i≤ littlσ iµ an∙ machinσ¡ o≥ compile≥-specifiπ codσ iε it« I⌠ shoulΣ ì thereforσ compilσ anΣ ruε oε mos⌠ othe≥ environments« Iµ you≥ compile≥ ì and/o≥ operatinτ systeφ doe≤ no⌠ suppl∙ exac⌠ filσ sizσ informatioε t∩-thσ-ì byte¼ yo⌡ wil∞ havσ t∩ writσ ß littlσ functioε t∩ coun⌠ byte≤ iε orde≥ t∩ ì bσ ablσ t∩ storσ bytecount≤ iε thσ chunkfiles« Thi≤ wil∞ somewha⌠ slo≈ thσ ì systeφ down« Thσ majo≥ requiremen⌠ i≤ tha⌠ you≥ compile≥ bσ ANS╔-draf⌠ compatible« ì (Beforσ yo⌡ ask¼ NO¼ BD╙-├ i≤ NOT.⌐ Mos⌠ al∞ DO╙ compiler≤ anΣ somσ CP/═ ì compiler≤ sucΦ a≤ Azteπ shoulΣ mee⌠ thi≤ requirement« iµ yo⌡ conver⌠ thi≤ ì prograφ fo≥ anothe≥ compiler/environment¼ PLEAS┼ senΣ mσ ß cop∙ fo≥ ì distribution« P├-forma⌠ disk≤ preferred¼ thougΦ ╔ caε handlσ mos⌠ CP/═ 5ó ì formats. XI╔ KNOW╬ TRAP╙ AN─ "UNDOCUMENTE─ BEHAVIOR .RR L----!----!----!----!----!----!----!----!----!----!------------------R 1. WitΦ thσ curren⌠ heade≥ linσ parse≥ routine¼ iµ ß tilde¼ "~ó appear≤ ì áááááanywherσ BEFOR┼ thσ heade≥ line¼ thσ prograφ wil∞ repor⌠ aε error« I⌠ ì ááááásimpl∙ expect≤ t∩ finΣ thσ heade≥ a⌠ thσ firs⌠ tilde« S∩ iµ an∙ oµ ì áááááthσ BB╙ header≤ havσ ß tildσ iε them¼ simpl∙ edi⌠ theφ ou⌠ oµ thσ ì áááááchunδ file≤ beforσ Glueinτ them« Thi≤ wil∞ bσ fixeΣ iε thσ nex⌠ ì ááááárelease« ╔ go⌠ lazy¼ hi! 2. Iµ ▓ origina∞ file≤ havσ thσ samσ filσ namσ bu⌠ witΦ differen⌠ ì áááááextensions¼ sa∙ BIGFILE.▒ anΣ BIGFILE.2¼ anΣ yo⌡ wan⌠ t∩ chunδ theφ ì áááááboth¼ Chunδ wil∞ overwritσ thσ firs⌠ serie≤ oµ chunkfile≤ witΦ thσ ì ááááásecond« Thi≤ i≤ becausσ botΦ wil∞ producσ ß se⌠ oµ chunkfile≤ nameΣ ì áááááBIGFILE.CHx« I'φ no⌠ surσ thi≤ i≤ ß rea∞ probleφ wortΦ thσ fairl∙ ì áááááextensivσ codinτ needeΣ t∩ intelligentl∙ tra≡ it¼ bu⌠ iµ yo⌡ thinδ so¼ ì ááááále⌠ mσ know« Thσ eas∙ workarounΣ i≤ t∩ renamσ thσ chunkfile≤ t∩ ì áááááanothe≥ noε-conflictinτ namσ beforσ chunkinτ thσ nex⌠ one« Thσ DO╙ ì ááááácommanΣ woulΣ bσ "RE╬ BIGFILE.CH¬ BIGFILE1.CH*"« ╔ wil∞ probabl∙ makσ ì áááááthσ provisioε t∩ specif∙ thσ chunkfilσ name≤ iε thσ nex⌠ releasσ whicΦ ì áááááwil∞ positivel∙ eliminatσ thi≤ problem. 3. Thσ GLUEé prograφ wil∞ terminatσ witΦ aε erro≥ messagσ iµ therσ i≤ no⌠ ì áááááenougΦ RA═ availablσ t∩ proces≤ thσ chunkfilσ iε onσ completσ chunk« ì áááááSincσ I'vσ placeΣ aε arbitrar∙ limi⌠ oµ 32δ oε chunkfilσ sizes¼ thi≤ ì áááááshoulΣ no⌠ bσ ß problem« I⌠ woulΣ bσ ß rarσ P├ indeeΣ tha⌠ diΣ no⌠ ì áááááhavσ 32δ oµ raφ availablσ afte≥ loadinτ thi≤ program« Iµ thi≤ doe≤ ì ááááágivσ yo⌡ ß problem¼ le⌠ mσ know« ╔ caε codσ thσ routinσ t∩ usσ ì áááááwhateve≥ RA═ i≤ available« CP/═ user≤ ma∙ havσ ß problem¼ dependinτ ì áááááoε ho≈ baΣ you≥ ├ compile≥ is. è.pa .RR--!----!----!----!----!----!----!----!----!----!----!------------------R X╔II COMIN╟ ATTRACTIONS ╔ havσ ß couplσ oµ relateΣ program≤ u≡ m∙ sleeve« Thσ firs⌠ wil∞ bσ ß ì fixe≥ prograφ whicΦ wil∞ reaΣ ß chunkfilσ anΣ fi° thσ heade≥ t∩ match« ì Thi≤ wil∞ permi⌠ yo⌡ t∩ edi⌠ chunkeΣ textfile≤ withou⌠ thσ necessit∙ t∩ ì gluσ theφ bacδ togethe≥ anΣ theε rechunδ theφ afterwards« Thσ seconΣ one¼ primaril∙ oµ interes⌠ t∩ thσ W0RL╔ CBB╙ sysop≤ anΣ thosσ ì wh∩ usσ thσ CBB╙ codσ a≤ ß persona∞ mailbox¼ wil∞ automaticall∙ mergσ ì chunkfile≤ int∩ thσ CBB╙ mai∞ filσ a≤ messages« I⌠ wil∞ havσ thσ abilit∙ ì t∩ bσ programmeΣ fo≥ timσ s∩ tha⌠ i⌠ wil∞ feeΣ ß designateΣ numbe≥ oµ ì chunk≤ pe≥ uni⌠ time« AnΣ perhap≤ looδ a⌠ thσ mai∞ filσ t∩ determinσ wheε ì thσ previou≤ chunk≤ wen⌠ ou⌠ anΣ holΣ ofµ sendinτ morσ til∞ the∙ move« Thi≤ ì i≤ designeΣ t∩ removσ somσ oµ thσ drudger∙ froφ thσ sysop'≤ life« Sorr∙ ì MB╠ users¼ bu⌠ yo⌡ wil∞ no⌠ bσ compatiblσ witΦ thi≤ feature« WitΦ n∩ ì source¼ ╔ don'⌠ havσ thσ timσ t∩ muddlσ througΦ Jeff'≤ mailfilσ format. ╔ ma∙ eveε writσ ß littlσ prograφ fo≥ thσ user≤ tha⌠ wil∞ squir⌠ thσ ì chunkfile≤ ou⌠ t∩ thσ loca∞ bb≤ pe≥ ß schedule« M∙ timσ constraint≤ wil∞ ì determinσ thi≤ one« Iµ anyonσ i≤ interesteΣ iε workinτ witΦ mσ oε an∙ oµ ì these¼ pleasσ contac⌠ mσ b∙ mai∞ o≥ packe⌠ o≥ phonσ anΣ let'≤ coordinatσ ì ou≥ efforts« XIV. CLOSIN╟ NOTE Therσ arσ basicall∙ ▓ school≤ oµ though⌠ regardinτ publiπ domaiε software« ì Onσ schoo∞ say≤ tha⌠ yo⌡ shoulΣ no⌠ releasσ ß prograφ unti∞ it'≤ perfect« ì Tha⌠ yo⌡ shoulΣ spenΣ month≤ pickinτ al∞ thσ nit≤ anΣ eliminatinτ al∞ ì possiblσ rougΦ edges« Neve≥ releasσ sourcσ anΣ asδ fo≥ mone∙ wheε yo⌡ d∩ ì finall∙ releasσ onl∙ thσ objec⌠ file« Thσ othe≥ schoo∞ say≤ tha⌠ yo⌡ shoulΣ ì craf⌠ ß prograφ int∩ reasonabl∙ finσ order¼ eliminatinτ al∞ knowε bug≤ anΣ ì a≤ man∙ rougΦ edge≤ a≤ possible¼ anΣ theε releasσ thσ prograφ fo≥ thσ earl∙ ì gooΣ oµ al∞ wh∩ caε usσ it« Makσ notσ an∙ knowε rougΦ edge≤ iε thσ DO├ ì file¼ notσ tha⌠ therσ ma∙ bσ othe≥ problems¼ anΣ releasσ thσ prograφ witΦ ì sourcσ s∩ other≤ caε changσ thing≤ arounΣ t∩ sui⌠ thσ specifiπ situation« I'φ ß membe≥ oµ thi≤ latte≥ schoo∞ oµ thought« ╔ believσ tha⌠ ß prograφ ì tha⌠ ha≤ ß fe≈ knowε bug≤ bu⌠ i≤ nonetheles≤ usefu∞ i≤ bette≥ thaε promise≤ ì oµ ß perfec⌠ bu⌠ noε-existen⌠ one« HarΣ t∩ loaΣ anΣ executσ promises¼ hi« ì A≤ ╔ looδ ove≥ thσ histor∙ oµ publiπ domaiε software¼ ╔ realizσ tha⌠ thσ ì trul∙ grea⌠ program≤ werσ handleΣ iε jus⌠ thi≤ manner« Thi≤ lis⌠ start≤ ì witΦ thσ ver∙ firs⌠ commercia∞ gradσ software¼ thσ modeφ program¼ XMODE═ b∙ ì WarΣ Christensen« No≈ WarΣ probabl∙ coulΣ havσ madσ ß handsomσ chunδ oµ ì changσ sellinτ XMODEM« Remember¼ bacδ theε therσ wa≤ N╧ methoΣ oµ sendinτ ì datß viß modeφ iε aε erro≥-freσ fashion« I⌠ coulΣ havσ perhap≤ takeε thσ ì placσ oµ CrossTalδ a≤ thσ bes⌠ selle≥ oµ modeφ programs« Instead¼ WarΣ ì releaseΣ thσ prograφ anΣ thσ protoco∞ t∩ thσ publiπ domain« Thσ res⌠ i≤ ì history« ╔ stil∞ usσ MODEM╖ oε m∙ CP/═ machine≤ anΣ thσ lis⌠ oµ credit≤ t∩ ì peoplσ wh∩ havσ workeΣ oε i⌠ woulΣ fil∞ ß page. .pa èCHUNK'N'GLUEé i≤ b∙ n∩ mean≤ iε thσ samσ leaguσ witΦ XMODEM¼ bu⌠ i⌠ doe≤ ì fil∞ ß neeΣ anΣ i≤ offereΣ iε thσ samσ spirit« Hacδ it¼ pla∙ witΦ it¼ ì stud∙ it¼ perhaps¼ criticizσ it¼ bu⌠ pleasσ remembe≥ tha⌠ i⌠ i≤ free« ì Therefore¼ ╔ canno⌠ suppor⌠ i⌠ likσ ß commercia∞ program« Letters¼ disk≤ ì anΣ packe⌠ message≤ arσ welcome╗ phonσ call≤ fo≥ simplσ question≤ arσ not« ì (Iµ yo⌡ wan⌠ t∩ collaboratσ oε thi≤ o≥ othe≥ projects¼ pleasσ D╧ call« I'φ ì listeΣ iε Information.⌐ Als∩ remembe≥ tha⌠ thi≤ i≤ aε earl∙ release« ì THER┼ MA┘ STIL╠ B┼ UNDISCOVERE─ BUGS« ╔ havσ testeΣ thσ prograφ ì extensivel∙ iε thσ P├-DO╙ 3.▒ environmen⌠ usinτ MicroSof⌠ ├ v4.0« ╔ tr∙ t∩ ì writσ portablσ code¼ bu⌠ there'≤ n∩ guaranteσ thi≤ prograφ wil∞ ruε oε ì othe≥ thaε DO╙ machines« So¼ havσ fuε y'all. --¡ EN─ ---