Oakland CPM Archive/oakcpm.iso/sigm/vol183/yam.hqp/YAM.HLP

Text File | 1985-02-10 | 16.1 KB | 390 lines

INTRODUCTION to the YAM Communications Utility
The "YAM" family of programs
Gettinτ "YAMó t∩ you≥ compute≥
YAMBOOT details
The YAM/MODEM Handshake Protocol
Other programs which WILL work with YAM ** 20/Jun/84 **
Other programs which MAY work with YAM
Preconfigured versions of YAM for specific computers
XYAM
Using CRCK to check file transfers
Adapt this help file to your needs
:Introduction

Thσá concep⌠á oµá Remotσ CP/═ (RCPM⌐ system≤ relie≤á oεá user≤ ì
havinτ thσ abilit∙ t∩ transfe≥ file≤ t∩ anΣ froφ thσ systeφ iε ì
somσá securσá manner«á Thσá securit∙á come≤á froφá handshakinτ ì
betweeεá thσ sende≥ anΣ receive≥ t∩ le⌠ thσ sende≥á kno≈á tha⌠ ì
thσ receive≥ go⌠ ß gooΣ (n∩ errors⌐ cop∙ oµ thσ file.

Prio≥ t∩ thσ adven⌠ oµ RCP═ typσ system≤ therσ haΣ beeε littlσ ì
neeΣá fo≥ thesσ typσ oµ program≤ iε Australiß a≤ microcompute≥ ì
user≤ havσ no⌠ beeε strongl∙ communication≤á oriented¼á mostl∙ ì
duσá t∩á restrictivσá policie≤ oε thσ par⌠á oµá Telecom«á Wha⌠ ì
littlσá neeΣá therσá ha≤á beeεá ha≤á beeεá met¼á iεá thσá CP/═ ì
environmen⌠ a⌠ least¼ b∙ commercia∞ program≤ sucΦ a≤ BSTAM«

Wha⌠á i≤á requireΣ fo≥ interactivσ communicatioε witΦá ßá RCP═ ì
systeφá i≤ utilit∙ whicΦ wil∞ allo≈ ASCI╔á communication≤á fo≥ ì
logiεá anΣá RCP═á commanΣá instigatioεá anΣá wil∞á als∩á allo≈ ì
handshakinτá (o≥á protocol⌐ filσ transfer≤ iε botΦá direction≤ ì
withou⌠á havinτá t∩á returε t∩ thσá operatinτá systeφá commanΣ ì
level.


Iε thσ USA¼á RCP═ system≤ havσ beeε oε linσ fo≥ severa∞á year≤ ì
anΣá numerou≤á program≤ whicΦ fulfil∞ thσá abovσá requirement≤ ì
havσ beeε developed« Development has follwed tw∩ streams.

Thσ firs⌠ streaφ i≤ thσ serie≤ oµ program≤ whicΦ g∩ unde≥á thσ ì
generiπá titlσá oµá "MODEM"«á Thesσ program≤ al∞ steφá froφá ß ì
prograφá writteεá b∙á WarΣá Christenseεá fo≥á thσá ver∙á firs⌠ ì
microcompute≥ bulletiε boarΣ systeφ iε thσ world¼á thσ Chicag∩ ì
CBBS« Thσ MODE═ program≤ arσ al∞ writteε iε assemble≥ codσ anΣ ì
arσ iε thσ publiπ domain.

Thσá seconΣ streaφ i≤ ß serie≤ oµ program≤ whicΦ g∩ unde≥á thσ ì
namσ oµ YA═ ("Y"e⌠ "A"nothe≥ "M"odem program)«á Thesσ program≤ ì
steφá froφ attempt≤ t∩ rewritσ thσ MODE═ program≤ int∩ thσ "Có ì
higΦ leve∞ language« Thσ YA═ programs¼ b∙ Chucδ Forsberg¼ gre≈ ì
froφá thσ MODEM.├ programs«á YA═ offer≤ man∙á morσá facilitie≤ ì
thaεá MODE═á anΣ i≤ easie≥ t∩ maintain«á YA═ program≤ usσá thσ ì
samσá protocol≤ a≤ thσ MODE═ program≤ anΣ the∙ wil∞ "talkóá t∩ ì
eacΦ other. They are also in the public domain.

:The "YAM" family of programs
è
YA═ i≤ writteε iε ß modern¼á higΦ leve∞ language¼á "C"« I⌠ wa≤ ì
writteεá witΦ thσ ideß tha⌠ i⌠ shoulΣ bσ transportablσ t∩ non-ì
CP/═á environment≤á anΣá i≤ thσ best choicσá iµá yo⌡á arσá no⌠ ì
runninτá in a CP/M environment.á ╔ als∩ conside≥ i⌠á thσá bes⌠ ì
choice if you are running CP/M.

Thσá prograφá i≤ writteε iε ß modula≥ manne≥ anΣ al∞ thσá UAR╘ ì
dependen⌠á routine≤á arσ containeΣ iε ßá singlσá module«á Somσ ì
othe≥á hardwarσ dependen⌠ informatioε (sucΦ a≤ por⌠á addresse≤ ì
etc⌐á i≤á containeΣá iε heade≥ files«á Thi≤ makσá i⌠á eas∙á t∩ ì
suppor⌠á multiplσ version≤ oµ YA═ froφ substantiall∙ thσá samσ ì
se⌠á oµ files«á Thσ SYSO╨ i≤ currentl∙ supportinτ │á differen⌠ ì
UAR╘ version≤ oµ YA═ froφ thσ onσ se⌠ oµ sourcσ files.








Yo⌡á wil∞ neeΣ t∩ havσ thσ BD╙ "Có compiler¼á versioε 1.50á o≥ ì
later¼ t∩ compilσ YAM-80«

Iµá yo⌡á arσá comfortablσ witΦ thσá "Cóá languagσá yo⌡á shoulΣ ì
definitel∙á usσá YA═á insteaΣ oµ MODEM«á Eveε iµ yo⌡á arσá no⌠ ì
familia≥á witΦ "Có i⌠ i≤ wortΦ thσ effor⌠ oµ learning¼á t∩á bσ ì
ablσ t∩ compilσ YAM«á YA═ i≤ ß mucΦ morσ flexiblσ utilit∙ thaε ì
MODE═á anΣá i≤á typica∞ oµ thσ numerou≤á higΦá qualit∙á publiπ ì
domaiε utilitie≤ availablσ iε "C".

Thσ versioε oµ YAM-8░ currentl∙ availablσ i≤ YA═ 3.12« Seσ thσ ì
filσ YAM.DO├ fo≥ ful∞ documentatioε oε thσ program«

A CP/M-86 version of YAM is also available from SIG/M.

:Getting "YAM" to your computer

Unti∞á yo⌡ havσ ß cop∙ oµ YA═ thσ onl∙ wa∙ t∩ transfe≥ datß i≤ ì
a≤á ASCI╔á text«á YA═á i≤ ß biτ prograφá anΣá thσá chance≤á oµ ì
transferrinτ i⌠ viß phonσ withou⌠ somσ error≤ i≤ no⌠ good.

Thσ solutioε i≤ t∩ usσ eithe≥ oµ thσ shor⌠ program≤á YAMBOOT.├ ì
o≥á MBOOT.ASM«á YAMBOO╘ i≤ ß minima∞ versioε oµ YA═ (wel∞ sor⌠ ì
of⌐  anΣ MBOO╘ i≤ ß minima∞ versioε oµ MODE═ «á Virtuall∙á al∞ ì
the∙ caε d∩ i≤ receivσ file≤ usinτ thσ "Christensenó protocol« ì
Thσá basiπá ideß i≤ tha⌠ yo⌡ transfe≥ YAMBOOT.├ o≥á MBOOT.ASM¼ ì
whicΦá arσ relativel∙ short¼á t∩ you≥ systeφ a≤ ASCI╔ tex⌠á b∙ ì
typinτá thσá file«á (Seσ thσ "YAMBOO╘á detailsóá categor∙á fo≥ ì
details)«áá Yo⌡á theεá compile/assemblσá YAMBOOT/MBOOT¼áá witΦ ì
appropriatσ UAR╘ datß fo≥ you≥ system¼á anΣ usσ i⌠ t∩ transfe≥ ì
YA═ witΦ thσ securit∙ oµ ß protoco∞ transfer.

Theε yo⌡ compilσ thσ YA═ sourcσ codσ witΦ fo≥ you≥ computer.
è
:YAMBOOT details

Therσá i≤ ß prograφ calleΣ YAMBOOT.├ whicΦ i≤ thσ madσ u≡ froφ ì
part≤ oµ thσ YA═ prograφ bu⌠ ha≤ n∩ 'frills'.

Iµá yo⌡á havσ somσ wa∙ t∩ prin⌠ you≥ dialoτ witΦá thi≤á systeφ ì
theε TYP┼ thσ file¼á anΣ prin⌠ i⌠ t∩ you≥ printer«á YAMBOO╘ i≤ ì
theε smal∞ enougΦ t∩ typσ int∩ you≥ systeφ anΣ compile.

Alternativel∙á iµ yo⌡ havσ aε ASCI╔ transfe≥ prograφá sucΦá a≤ ì
BSTMS¼á TELNET¼á ASCO═á etπ whicΦ allow≤ yo⌡ t∩ capturσá ASCI╔ ì
tex⌠á froφ ß remotσ system¼á yo⌡ caε savσ thσá YAMBOO╘á sourcσ ì
tex⌠ a≤ ß filσ anΣ avoiΣ thσ retypinτ beforσ compilinτ it«

Wheεá YAMBOO╘ ha≤ beeε compileΣ yo⌡ caε down-loaΣ thσ ful∞ YA═ ì
program.

Seσá thσ READ-ME.YA═ filσ anΣ YAMBOOT.├ itselµ fo≥ detail≤á oµ ì
wha⌠ yo⌡ neeΣ t∩ kno≈ t∩ compilσ YAMBOOT.




YAMBOO╘ i≤ thσ MUC╚ easie≥ t∩ ge⌠ goinτ thaε MBOO╘ iµ yo⌡ havσ ì
thσ BD╙ "Có compiler« Yo⌡ onl∙ neeΣ t∩ havσ you≥ BDSCIO.╚ filσ ì
se⌠á u≡ correctl∙ fo≥ you≥ modeφ por⌠ (whicΦ i≤ obviousl∙á thσ ì
casσá iµá yo⌡ arσ usinτ TELNET)«á Theε yo⌡ shoulΣ bσá ablσá t∩ ì
compilσ YAMBOO╘ withou⌠ an∙ change≤ a⌠ all.

:The YAM/MODEM Handshake Protocol

BotΦá YA═á anΣá MODE═á usσ thσá samσá handshakσá protoco∞á fo≥ ì
transferrinτá singlσ file≤ anΣ caε worδ witΦ eacΦ other«á The∙ ì
usσ ß differen⌠ protoco∞ iε thσ "batchó modσ anΣ wil∞ NO╘ worδ ì
witΦ eacΦ othe≥ iε thi≤ mode«á BotΦ YA═ anΣ MODE═ usσ thσ samσ ì
CR├á checδ wheε runninτ iε tha⌠ modσ anΣ wil∞ worδá witΦá eacΦ ì
othe≥ fo≥ singlσ filσ transfers.

Thσ "Christensenó protoco∞ useΣ b∙ YA═ anΣ MODE═ i≤á describeΣ ì
iε thσ filσ PROTOCOL.LBR available through SIG/M.

:Other programs which WILL work with YAM

ListeΣá belo≈á arσ othe≥ program≤ whicΦ thσ SYSO╨á know≤á wil∞ ì
worδ YAM« Iµ yo⌡ kno≈ oµ other≤ pleasσ leavσ ß messagσ fo≥ thσ ì
SYSOP.

"RCPMLINK.COM" fo≥ thσ Osbornσ ▒ compute≥.
ì
Thi≤á prograφ use≤ thσ "Christensenó protocol≤ anΣ i≤á claimeΣ ì
t∩á bσá full∙ compatiblσ witΦ MODEM«á Thσ SYSO╨ ha≤ testeΣá i⌠ ì
witΦ YA═ anΣ successfull∙ transferreΣ file≤ iε botΦ direction≤ ì
iεá thσá singlσ filσ mode«á RCPMLIN╦ i≤ ßá commercia∞á prograφ ì
baseΣ oε MODEM«
è

"CMODEM.├"

Thi≤ prograφ i≤ froφ thσ "CNODEó RCP═ systeφ iε thσ US┴ anΣ i≤ ì
writteεá iε BD╙ "C"«á ╔ havσ testeΣ i⌠ witΦ XYA═ anΣ i⌠á work≤ ì
fine« I⌠ i≤ aε enhanceΣ versioε oµ YAMBOO╘ anΣ wil∞ senΣ file≤ ì
a≤á wel∞á a≤ receivσ them¼á bu⌠ i≤ reall∙ onl∙ ß ver∙á minima∞ ì
communication≤ utility« It is a public domain program.


Sincσá thσá ful∞ YA═ sourcσ i≤ availablσ anΣ i⌠á offer≤á many¼ ì
man∙ morσ facilitie≤ thaε CMODEM¼á therσ seem≤ littlσ poin⌠ iε ì
usinτ CMODEM« Howeve≥ iµ yo⌡ havσ unusua∞ hardwarσ anΣ finΣ i⌠ ì
difficul⌠á t∩ ge⌠ YA═ goinτ CMODE═ woulΣ probabl∙ bσ ßá easie≥ ì
t∩ adapt«á I⌠ shoulΣ certainl∙ ruε oε an∙ systeφ tha⌠ caεá ruε ì
TELNET«á  Alternativel∙ iµ yo⌡ havσ ß lo≈ capacit∙ disδ systeφ ì
o≥á arσá shor⌠á oµ memor∙ thσ smalle≥ sizσ oµá CMODE═á ma∙á bσ ì
attractivσáá t∩áá you«áá Seσáá thσá star⌠á oµáá CMODEM.├áá fo≥ ì
documentation.


"MODEM86"

Thi≤á prograφ i≤ froφ Compuvie≈ Product≤ anΣ run≤á unde≥á botΦ ì
CP/M-8╢ anΣ MSDOS« I⌠ i≤ basicall∙ aε "86ó versioε oµ MODE═ 7« ì
I⌠á ha≤á ß fe≈ installatioε selection≤ bu⌠ unles≤ yo⌡ havσá aε ì
IBM-P├á o≥á Sirius-▒á bσá prepareΣ t∩á d∩á somσá 8╢á assemble≥ ì
programminτá t∩ ge⌠ thi≤ prograφ working«á ╔ wa≤ ablσá t∩á ge⌠ ì
MODEM8╢á runninτá oεá m∙á Godbou⌠ systeφ anΣ oεá thσá NE├á AP├ ì
withou⌠ to∩ mucΦ hassle« Oncσ it≤ running¼ i⌠ work≤ wellí


"TELED"

Thi≤á publiπ domaiε prograφ i≤ distributeΣ witΦ BD╙ ├á Versioε ì
1.5░á o≥á later«á I⌠á offer≤ considerabl∙ morσá feature≤á thaε ì
CMODE═á bu⌠á considerabl∙á les≤ thaεá YAM«á ╔á woulΣá ratσá i⌠ ì
relativel∙ eas∙ t∩ ge⌠ goinτ anΣ ß gooΣ firs⌠ excercisσ iµ yo⌡ ì
aσ jus⌠ gettinτ useΣ t∩ ├ a≤ ß programminτ language«á I⌠ work≤ ì
wel∞á witΦá XYAM«á ì


"MITE"

Thi≤á commercia∞á prograφ i≤ froφ Mycrof⌠ Lab≤á anΣá i≤á quitσ ì
nicel∙á done«á I⌠ i≤ availablσ iε CP/M-80¼á CP/M-8╢ anΣá MSDO╙ ì
versions«á I⌠á come≤ witΦ interface≤ t∩ severa∞ popula≥ micro-ì
computer≤ a≤ wel∞ a≤ enougΦ informatioε t∩ writσ ßá customiseΣ ì
interfacσ iµ yo⌡ can'⌠ usσ onσ oµ thσ supplieΣ ones«á  I⌠ tooδ ì
mσ ß fe≈ hour≤ onσ eveninτ t∩ writσ ß 265▒ USAR╘ interfacσ fo≥ ì
m∙ Godbou⌠ S-10░ system« Thσ prograφ ha≤ botΦ ß men⌡ systeφ o≥ ì
ßá serie≤ oµ direc⌠ commands«á Als∩ usefu∞ i≤ ß paramete≥ filσ ì
systeφ whicΦ allow≤ al∞ thσ parameter≤ whicΦ goverεá operatioε ì
witΦá an∙á particula≥á remotσ systeφ t∩ bσ stasheΣ awa∙á iεá ß ì
paramete≥ file¼ theε recalleΣ anΣ automaticall∙ se⌠.

A≤ wel∞ a≤ Christenseε protoco∞ i⌠ support≤ thσ Mycroft¼ CLIN╦ ì
anΣ LYN├ binar∙ protocols«á Work≤ wel∞ witΦ XYAM«á Thσá manua∞ ì
als∩áá contain≤áá somσáá gooΣá tutoria∞áá materia∞áá oεáá datß ì
communication≤ anΣ thσ RS-232-├ standard« Somewherσ abou⌠ halµ ì
wa∙ betweeε MODE═ anΣ YA═ iε term≤ oµ feature≤ anΣ facilities.


"ASCOM"

Late≥ version≤ oµ thi≤ prograφ froφ DM┴ suppor⌠ wha⌠ the∙ terφ ì
"CP/═áá Use≥áá Grou≡á Protocolóá whicΦá i≤á thei≥áá namσáá fo≥ ì
"Christensenó protocol« ╔ havσ testeΣ ASCO═ Ve≥ 2.┤ oε ß CP/M-ì
8╢á systeφ witΦ XYA═ anΣ i⌠ workeΣ finσ iε filσ transfe≥á modσ ì
iε botΦ directions«á ╔ assumσ tha⌠ thσ equivalen⌠ CP/M-8░á anΣ ì
MSDO╙á version≤á shoulΣá als∩ worδ OK«á Bσá carefu∞á witΦá thσ ì
interfacσá routine≤ fo≥ yo⌡ USART«á ╔ haΣ t∩ rewritσ thσá 825▒ ì
interfacσ fo≥ thσ NE├ AP├ ╔ wa≤ usinτ t∩ tes⌠ ASCO═ on¼ a≤ thσ ì
AP├ interfacσ supplieΣ b∙ DM┴ haΣ n∩ hopσ oµ working.


"MODEM-901/86"

Thi≤ i≤ ß publiπ domaiε prograφ translateΣ t∩ CP/M-8╢ froφ thσ ì
CP/M-8░á versioεá b∙á Mikσá Mellinge≥á anΣá I«á I⌠á shoulΣá bσ ì
adaptablσá fo≥á an∙ CP/M-8╢ systeφ (bu⌠á no⌠á witΦá Concurren⌠ ì
CP/M-8╢áá withou⌠á furthe≥á work)«áá I⌠á ha≤á beeεá testeΣá oε ì
Godbout/Compupro¼á NE├á AP├á anΣ DE├ Rainbo≈ 10░á systems«á I⌠ ì
available through SIG/M in MODEM-86.LBR.


MODEM68

Thi≤ i≤ ß publiπ domaiε prograφ writteε iε 680░ assemble≥á fo≥ ì
operatioε unde≥ thσ FLE╪ operatinτ system« I⌠ wa≤ developeΣ a⌠ ì
Telecoφ Australiß anΣ i≤ claimeΣ b∙ Telecoφ 680░ user≤ t∩ worδ ì
well«á A≤ ╔ don'⌠ havσ acces≤ t∩ ß 680░ systeφ ╔ haven'⌠á eve≥ ì
useΣá i⌠ myself«á Thσ prograφ i≤ supposeΣ t∩ "lookó ver∙á mucΦ ì
likσ MODEM╖ a≤ fa≥ a≤ thσ use≥ interfacσ goes.

MODEM6╕ i≤ availablσ through SIG/M as MOD68-13.LBR


UMODEM

Thi≤ prograφ i≤ writteε iε "Có fo≥ Uni° systems« I⌠ implement≤ ì
thσá "Christensenóá protoco∞ anΣ i≤ compatiblσá witΦá YA═á anΣ ì
MODEM«á Versioε 2.╖  ha≤ beeε implementeΣ oε thσ BASSER-VA╪ a⌠ ì
Sydne∙ Universit∙ anΣ work≤ finσ iε non-batcΦ mode.



PC-TALK

Thi≤ prograφ i≤ writteε iε BASI├ fo≥ thσ IBM-P├ runninτ PCDOS« ì
I⌠á implement≤ Christenseε protoco∞ anΣ i≤ compatiblσ witΦ YA═ ì
anΣ MODEM«á Beinτ writteε iε BASI├ i⌠ i≤ slow¼á gooΣ onl∙á fo≥ ì
30░á bp≤ operatioε witΦ thσ IB═ BASI├ interprete≥ anΣ 120░ bp≤ ì
operatioεá witΦá IB═á BASI├á compiler«á Thσá sourcσá codσá anΣ ì
documentatioε arσ availablσ oε PC/BLUE volume≤ 3▒ anΣ 32.


DOS/65 MODEM

Thi≤á come≤á witΦ thσ DOS/6╡ operatinτ systeφ fo≥á 650▓á baseΣ ì
machines« Severa∞ user≤ havσ tolΣ mσ tha⌠ i⌠ doe≤ successfull∙ ì
transfe≥ file≤ witΦ XYA═ froφ thi≤ system«á ╔ don'⌠ kno≈ wherσ ì
you get it.

:Other programs which MAY work with YAM

ListeΣá belo≈ arσ othe≥ program≤ whicΦ thσ SYSO╨ suspect≤á ma∙ ì
worδá witΦá YAM«á Thesσ program≤ havσ NO╘ beeε testeΣ anΣá thσ ì
SYSO╨ woulΣ appreciatσ an∙ furthe≥ information.

**¬á Therσá arσá n∩ program≤ whicΦ fi⌠ thi≤á categor∙á a⌠á thσ ì
moment ***

:Preconfigured version of YAM for specific systems

WitΦ reasonablσ skill¼á thσ "standardó version≤ oµ YAM/YAMBOO╘ ì
shoulΣá bσ ablσ t∩ bσ implementeΣ oε an∙ CP/═ system«á Howeve≥ ì
duσ t∩ thσ non-standarΣ naturσ oµ somσá systems¼á particularl∙ ì
system≤ no⌠ originall∙ intendeΣ fo≥ CP/═ operatioε sucΦ a≤ thσ ì
Applσ 2¼á ß preconfigureΣ versioε oµ thσ YA═ ma∙ bσ available« ì
Thσáá filσá READ-ME.YA═á wil∞á tel∞á yo⌡á whicΦá preconfigureΣ ì
version≤ arσ currentl∙ available.

Thesσ preconfigureΣ version≤ havσ beeε contributeΣ b∙ use≤ wh∩ ì
haΣ t∩ develo≡ theφ thσ "hardó way« Iµ yo⌡ d∩ ß ne≈ versioε oµ ì
thσ communication≤ utilitie≤ fo≥ you≥ systeφ pleasσ contributσ ì
you≥á versioε s∩ tha⌠ othe≥ user≤ oµ you≥ typσ oµá systeφá caε ì
benefi⌠ froφ you≥ efforts.

:XYAM

XYA═á i≤ ß specia∞ versioε oµ YAM«á I⌠ i≤ designeΣ fo≥ usσá oε ì
RCP═á system≤á anΣá a≤á sucΦá i⌠á ha≤á somσá specia∞á feature≤ ì
necessar∙ iε tha⌠ sor⌠ oµ environment.

Generall∙ thesσ feature≤ arσ designeΣ t∩ makσ theφ i⌠ fo≥á thσ ì
remotσá use≥á t∩ contro∞ (i.e«á morσ messages⌐ anΣ t∩á preven⌠ ì
"dangerousóá thing≤á happeninτ t∩ thσ RCP═á systeφá (i.e«á CO═ ì
file≤á beinτá sen⌠ t∩ thσ RCP═ systeφ anΣ theε beinτá useΣá t∩ ì
crasΦ thσ system)«

Oεá an∙á RCP═ systeφ therσ arσ certaiε systeφ file≤ whicΦá arσ ì
no⌠á availablσ fo≥ transfe≥ (fo≥ ß variet∙á oµá reasons)«á Thσ ì
XYA═á prograφá caε detec⌠ thesσ file≤ anΣá wil∞á no⌠á transfe≥ ì
them.

XYA═ i≤ ß superio≥ replacemen⌠ fo≥ XMODEM« YA═ anΣ XYA═ caε bσ ì
buil⌠á froφá thσ samσ se⌠ oµ sourcσ files«á Yo⌡ onl∙á neeΣá t∩ ì
change a few definitions in the header files and recompile.ì

:Using CRCK to check file transfers
è
Whateve≥ methoΣ yo⌡ usσ t∩ transfe≥ file≤ froφ ß remotσ systeφ ì
therσ i≤ ß wa∙ yo⌡ caε seσ iµ yo⌡ endeΣ u≡ witΦ ß gooΣ cop∙ oµ ì
thσ files« I⌠ involve≤ comparinτ CR├ checksum≤ oµ thσ files.

T∩á obtaiεá thσ CR├ checksuφ oµ ß filσ oε thσ RCP═ systeφá usσ ì
the XYAM utility. At the XYAM prompt give the command

     CRCK filename

XYA═á wil∞ givσ yo⌡ ß ┤ digi⌠ hexadecima∞ numbe≥ whicΦ i≤á thσ ì
checksum of the file derived using the CCITT polynomial.

T∩ obtaiε thσ CR├ checksuφ a⌠ you≥ enΣ usσ thσ CRC╦ commanΣ iε ì
you≥á cop∙á oµ YA═ o≥ iµ yo⌡ aren'⌠ usinτ YA═ usσ thσá CRC.CO═ ì
utility«á Thσá CR├ checksuφ produceΣ b∙ CRC.CO═ i≤ thσ samσ a≤ ì
i≤ produceΣ b∙ thσ CRC╦ functioε iε YAM.

Thσ CRC╦ number≤ fo≥ thσ filσ oε thσ RCP═ systeφ anΣ thσá dowε ì
loadeΣá filσ oε you≥ systeφ shoulΣ bσ identical«á Iµ the∙á arσ ì
not, an error occurred during the file transfer.



Thσá samσ methoΣ caε bσ useΣ t∩ checδ tha⌠ file≤ u≡ loadeΣá t∩ ì
the RCPM system were received correctly.

Thσá morσá recen⌠ Use≥ Grou≡ volume≤ wil∞ havσ CR├ file≤á witΦ ì
checksum≤á fo≥á al∞ thσ file≤ oε thσ volumσ o≥ wil∞á havσá CR├ ì
informatioεá iεá thσá volumσ -CATALO╟ file«á Iµá yo⌡á havσá t∩ ì
archivσá you≥á owεá program≤á it≤ ß gooΣ ideßá t∩á pu⌠á ßá CR├ ì
checksuφá filσ oε eacΦ archivσ disk¼á wheε yo⌡ neeΣ t∩á acces≤ ì
thσ archivσ file≤ yo⌡ caε easil∙ checδ t∩ seσ iµ thσ file≤ arσ ì
stil∞ intac⌠ beforσ usinτ them.

:Adapt this help file to your needs

Thi≤á hel≡á filσ fo≥ YA═ i≤ simpl∙ ß cu⌠ dowε versioεá oµá thσ ì
hel≡á filσá tha⌠ ╔ usσ oε thσ Softwarσ Tool≤ RCP═ t∩á describσ ì
botΦ thσ MODE═ anΣ YA═ t∩ user≤ oµ thσ system«á Oε onσ oµá thσ ì
previou≤á SIG/═ volume≤ you'l∞ finΣ aε earlie≥ versioε oµá thσ ì
compositσ YAM/MODE═ filσ calleΣ MODEM.HLP.

Yo⌡á shoulΣá adap⌠ thi≤ hel≡ filσ t∩ mee⌠ YOU╥ need≤á oεá you≥ ì
system¼á i⌠ i≤ reall∙ herσ simpl∙ a≤ ß guidσ toward≤ thσ sort≤ ì
oµá thing≤ ne≈ user≤ wil∞ neeΣ t∩ know«á Thσ grea⌠ benefi⌠á oµ ì
thσ HEL╨ utilit∙ anΣ HL╨ file≤ i≤ tha⌠ user≤ seeφ t∩á actuall∙ ì
REA─á them¼á whicΦá i≤ somethinτ the∙ rarel∙ seeφ t∩á d∩á witΦ ì
conventiona∞ DO├ files.

M∙á ideß witΦ thi≤ hel≡ filσ i≤ t∩ arousσ enougΦá interes⌠á iε ì
thσá prospectivσ YA═ use≥ t∩ makσ theφ WAN╘ t∩ g∩ ou⌠ anΣ reaΣ ì
thσ othe≥ YA═ documentatioε files.

                                   Bill Bolton,
è                                   Software Tools RCPM
                                   June 1, 1984