- fix a bug in the sh.s code that was garbled in the printout.

- now installing sh.s as /bin/sh in the rf0 image.

build/Makefile

@@ -138,7 +138,7 @@ root usr protofs : init sh
 	@$(TREECOPY) ../fs/new/etc root
 	@$(TREECOPY) ../fs/usr .
 	@cp init root/etc/init
-	@cp sh root/bin/xsh
+	@cp sh root/bin/sh
 	@touch protofs
 
 # build filesystem images

notes/notes.txt

@@ -267,6 +267,11 @@ e11-01
    - changed "cdpb B(r5),$'-"  to "cmpb 8(r5),$'-" which seems like
      what the code is trying to do.  Left the "calleZd" and "loginx~"
      typos in the comments as is.
+     - I compared this against the s2 binary for /bin/sh and the
+       code sequence looks similar.  This instruction is 
+       "cmpb  @2(R5),#55" which properly does what the comments say.
+       It reads argv[0][0] and compares with '-'.  Edited this
+       code to be in agreement.
    - uncommented string after "jsr r5, error" line since other calls to
      error are followed by literal strings.
 e11-02

pages/e11-01

@@ -1,7 +1,7 @@
 / sh -- command interpreter
 	mov	sp,r5
 	mov	r5,shellarg / save orig sp in shellarg
-	cmpb	8(r5),$'- / was this sh calleZd by init or loginx~
+	cmpb	*2(r5),$'- / was this sh calleZd by init or loginx~
 	bne	2f / no
 	sys	intr; 0 / yes, turn off interrupts
 	sys	quit; 0