[Coco] Trouble with check

[Michael C. Robinson]

I'm having trouble getting Rainbow check plus to work.  I'm on a 512k
coco3 with a drivewire rom pack.  Has anyone else with my setup
experienced problems with check?  I copied check out of the September
1986 Rainbow.  I've been typing in a game that I should be able to use
check on.  Do some of the lines need to be changed?

10 CLS:X=256*PEEK(35)+178
20 CLEAR 25,X-1
30 X=256*PEEK(35)+178
40 FOR Z=X TO X+77
50 READ Y:W=W+Y:PRINT Z,Y;W
60 POKE Z,Y:NEXT
70 IFW=7985THEN80ELSEPRINT"DATA ERROR":STOP
80 EXEC X:END
...

The rest is on page 15 of the September 1986 Rainbow.