10 Nov
2016
10 Nov
'16
4:42 a.m.
From: Christian Corti
Seems the original must have been the XXDP TC11
DECtape formatter
program by Robert J. Collins. I have no clue where I found the RT11
version of this
So that made me wonder if the V6 Unix version of tcf.s really was related to
DTF.MAC. I checked out the two of them, and it seems they are likely
un-related; very different structure, etc.
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?
On Nov 9, 2016, at 5:57 PM, Josh Dersch wrote:
I believe S/B is the expected data
Yes, probably stands for 'should be'.
Noel