CCWN76 :85
THE STATE MACHItlE ltEYER by Jim Maynard

I^d llke tO descrlbe ~y new keyer, tn bulldlng lt t trled that was for
ae a new technlquei ~stote rzenlnes,"

Objectlves

The keyer was to lnelude lamble operatlonw wlth selewcoorleting cheracters
and automatle charZcter and tord sP~clnq~ zo facllltate use Vlth CCW~ the
weyer^s clock was to run d11 the tlmew ond not stop wnen waltinq for a
naddle to be closed.

Also, I ~anted tO Preclsely set tbe kPyer sneed wtth 8 Ddlr 0t thu~Ftheel
swltehes, tI have olwaYs been annoyed vlth other weyersS contlnuous speed
controlsw thelr dlals are never callbrated correctly~ sO you never tnow
just hOw fast YOU are •endlng, How can you honor a request tO tORS 15,"
when You canot Set your speed rellably to flfteen words per mlnute?)

Deslqn 4DDroach

t beXan by conslderlnX just what r wanted the teyer to do, It was tos

, 5end dlts

, Send dons

, Send e~oraeter •paees

, Send word spaceo

, Walt, 1! necessarY, for a PaddRe to be depressed~


When sendlnq a dlt, the wever ls ln the wsendlnq dlt otate~" when
Sendlnq a dzh~ it ls ln the Wsendlnq dah state~" ete, When waltlno for lnnut,
It ls ln th~ wstZndby stotc.~

These states were sUbdlvlded~ For l~stance, to send a dlt~ the weyer sends
a "1" for one clock Derlod, followed by a "0" for ~ second elock period,
blvewise~ to send a dah~ it sends ones fOr three eloct Periods~ followed by a
zero durlnU a fOurth clocK Perlod~ Sow T dlvided the Sendlnq Olt State lnto
two statesl StNDIT1~ and SENDIT2~ The weYer tould •nter the state SENDITI
on one elocK pulse, and Jhlle 1n that state send a onew the next clocK pulSQ
tFould put lt ln SEND!T2~ durlnq whleh It would Output a zPro, Llkewise~ 1n tne
sentes SENDt 8!tlDAH2~ BENDAH32 SENDAH4 tsne keyer ~ould OUtPUt one, onet one.
zero. I came UD wrlth a total of 13 statesl

          STA Y                                twaltlnq for inPut)
          sEYD!T1, srNDIT2                     tsendlnQ a dlt)
          SE~XOAM1. SEN0~82~ s£sDAR3, 8ENDAM4  tsendlfx a dah)
          SSNDCS1, SENDCS2                     tsendlnq a CharaCter spece)
      
      StMOwSl, SENOWS2, 5sslDWs3~ SENDWS4 tsendlng a tord space)