Use ^H to move left one position.

install/terminfo

@@ -15,7 +15,7 @@ ansi-bbs,
 	colors#8, cols#80, lines#24, pairs#64, 
 	acsc=l\332m\300k\277j\331u\264t\303v\301w\302q\304x\263n\305`\004a\260f\370g\361~\371.\031-\030h\261i^U0\333y\363z\362, 
 	bel=^G, blink=\E[5m, bold=\E[1m, clear=\E[2J\E[H, cr=^M, 
-	cub=\E[%p1%dD, cub1=\E[D, cud=\E[%p1%dB, cud1=\E[B, 
+	cub=\E[%p1%dD, cub1=^H, cud=\E[%p1%dB, cud1=\E[B, 
 	cuf=\E[%p1%dC, cuf1=\E[C, cup=\E[%i%p1%d;%p2%dH, 
 	cuu=\E[%p1%dA, cuu1=\E[A, ed=\E[J, el=\E[K, el1=\E[1K, 
 	home=\E[H, ht=^I, ind=^J, invis=\E[8m, kbs=^H, kcub1=\E[D, 
@@ -26,3 +26,4 @@ ansi-bbs,
 	kpp=\E[V, nel=^M^J, op=\E[m, rc=\E[u, rev=\E[7m, 
 	rs1=\E[m\E[2J\E[H, sc=\E[s, setab=\E[4%p1%dm, 
 	setaf=\E[3%p1%dm, sgr0=\E[m, smul=\E[4m, 
+	sgr=\E[0%?%p1%p6%|%t;1%;%?%p1%p3%|%t;7%;%?%p7%|%t;8%;m