Need more speed in Lookdown and Branchl instructions

Hello
I use this code to write text in to a lcd but I need more speed
Have anyone idea how to get more speed, perhaps in assembler, how can I write this two instructions "Lookdown and Branchl" in Assembler?
Than I have not experience in Assembler.

Thanks for any help

Regards
Pedro

Code:

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Lookdown text[ciclo],[" .,çÇ$%&´()*+/0123456789:<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_€;-"],asckey

bRANCHL asckey, [esp,ponto,virgula,ccp,ccg,dolar,procento,Icomerc,hkoma,aprentis,fparentis,asterisco,mais,backlashD,zero,um,dois,tres,quatro,_
                cinco,seis,sete,oito,nove,doisp,mpm,igual,mm,interroga,arroba,ag,bg,cg,dg,eg,fg,gg,hg,ig,jg,kg,lg,mg,ng,og,pg,qg,rg,_
                sg,tg,ug,vg,wg,xg,yg,zg,ap,bp,cp,dp,ep,fp,gp,hp,ip,jp,kp,lp,mp,np,op,pp,qp,rp,sp,tp,up,vp,wp,xp,yp,zp,undsc,euro,aborta,menos]

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