General TC11 DECtape diagnostic/formatter questions

[Christian Corti]

On Thu, 10 Nov 2016, Noel Chiappa wrote:
> BTW, I noticed a couple of places in DTF.MAC where error checking code was
> commented out, e.g.:
>
>  ;EHLT4:	XX		;HALT WITH BLK#IN LIGHTS, CONTINUE
>  ;	MOV	#257.,R0	;TO FIND DATA WORD POSITION
>  ;	ADD	TOG1,R0		;DETERMINE WHICH WORD IS WRONG
>  ;EHLT5:	XX		;HALT WITH #OF WORD IN LIGHTS. 0=REV. CHKSUM
>  ;	MOV	@TCDT,R0	;CONTINUE TO FETCH BAD WORD
>  ;EHLT6:	XX		;HALT WITH BAD DATA IN LIGHTS. CONTINUE
>
> Maybe it would be useful to un-comment them?

No, this is the old code to display the error words in the front-panel 
display. Instead, my code (that follows the commented one) converts the 
words to ASCII octal representation and displays the appropriate error 
message on the console.

Christian