General TC11 DECtape diagnostic/formatter questions

Christian Corti cc at informatik.uni-stuttgart.de
Thu Nov 10 08:17:39 CST 2016


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


More information about the cctech mailing list