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Bugs<br />
Dear ZX Computing<br />
My children and I have enjoyed<br />
very much Tom Baker's programs<br />
(after debugging of<br />
course).<br />
Unfortunately, I am afraid<br />
that programs come with bugs<br />
to make our lives more interesting.<br />
Let me point out some<br />
faults in the last part of 'Light<br />
Screen Designer'.<br />
In the August September<br />
issue:<br />
1) At address 56632 in DOWN<br />
PIX, the coding should be FEBO<br />
as the instruction reads CPBO.<br />
2) At address 56708 in<br />
DR CURSOR. The address of<br />
DOWN PIX is DD36, so the<br />
coding should be 1E36.<br />
3) At address 56713 in the<br />
same table, the address of UP<br />
PIX is DD29, so the coding<br />
should be 1 E29.<br />
In the October November<br />
issue:<br />
At address 56980 after<br />
CSR EXIT in MAIN LOOP the<br />
coding should be CDB6DD, as<br />
the instruction is Call DR CUR<br />
SOR, and the code for Call Addr.<br />
is CD and the address of<br />
DR CURSOR is DDB6.<br />
I am sure that most of the<br />
readers have managed to find<br />
ihese bugs, but I hope that my<br />
comments will be a help to some<br />
of them.<br />
Finally, I would like to thank<br />
you for your wonderful<br />
magazine and the superb articles<br />
in it.<br />
Yours faithfully,<br />
Pmchas Levin<br />
Israel<br />
in with a<br />
vengeance<br />
Dear Ray,<br />
As a result of your courteous<br />
nod helpful call last Sunday, we<br />
are back IN with a vengeance,<br />
much to the relief of my progeny<br />
with their Series 1, 2 and 3<br />
Spectrums.<br />
I have tried and tested<br />
IF IN 65278-32 xlNT«65278<br />
32K31 THEN. . .<br />
Which will enable all five keys in<br />
the row to be used.<br />
Changing the 65278 to the<br />
values for each row (pi 18 of<br />
manual) enables any row to be<br />
used. Chagmg the sign to ' '<br />
the value to 31-1,2,4,8, or 16<br />
enables any key to be selected<br />
for use. Excellent.<br />
On test, my machine still<br />
wobbles between 191 and 255<br />
when hot. I normally assist its<br />
cooling with natural draught by<br />
raising the base on four plastic<br />
screw type bottle tops.<br />
Finally, I lent my copy to a<br />
gentleman I meet at church each<br />
day to copy the QL program. His<br />
first attempt, it worked first time<br />
to the delight of all his family,<br />
but he had to slow the operation<br />
down.<br />
I hope other readers with<br />
Series 3 machines have read<br />
that little aside on page 48. Doing<br />
so will remove lots of<br />
dissatisfaction and frustration.<br />
Yours gratefully,<br />
Jim Moran C.Eng.M.I.E.E.<br />
Essex<br />
WELCOME<br />
Overseas market<br />
Dear Sir<br />
I have noticed that the advertisements<br />
in ZX Computing are<br />
aimed at the UK market and not<br />
the growing overseas market.<br />
I have just received the<br />
August/September issue, so the<br />
A.G.F. offer had already expired.<br />
Also, most of us overseas<br />
have either Visa or Mastercard<br />
credit cards, and not Access or<br />
Eurocards.<br />
I have bought items through<br />
your magazine i.e. Software<br />
Supermarket on their hot line,<br />
and received prompt service.<br />
but the majority ol your advertisements<br />
do not offer Visa,<br />
Mastercard or hot line telephone<br />
numbers.<br />
No doubt you are aware that<br />
your magazine is shipped world<br />
wide, and that you have a grow<br />
ing readership overseas. I find<br />
that your magazine is very informative<br />
and contains many<br />
useful bits of information, so<br />
come on you advertisers, is our<br />
brass no good? Remember, you<br />
get paid in advance with our<br />
credit card numbers.<br />
Yours<br />
Mr F. E. Southworth<br />
W. Australia<br />
ZX COMPUTING APRIL/MAY 1985 9
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