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How to play<br />
Valhalla<br />
Dear Sirs,<br />
t live in Sao Paulo, Brazil, and I<br />
have a ZX Spectrum that I<br />
bought in Germany. I also have<br />
some software, including the<br />
Valhalla game, released by<br />
Legend Productions.<br />
As a matter of fact, I'm<br />
writing to you because of this<br />
game. In its manual, on page 11,<br />
mention is made of computing<br />
magazines that "provide help<br />
comers to keen adventurers".<br />
I do need help, because I<br />
can't go further; I made a map<br />
and found out the position of 27<br />
locations, but now I'm going in<br />
circles, and in spite of having<br />
played for several hours I've not<br />
found Ofnir yet, and this is the<br />
first step of the game. As you<br />
can imagine, it is very difficult<br />
and expensive to buy foreign<br />
magazines here in Brazil (most of<br />
them do not come regularly):<br />
therefore I ask you to please<br />
send me some hints on how to<br />
play Valhalla, or please ask your<br />
readers if they can send me this<br />
information. Maybe there is a<br />
book or specific magazine with<br />
hints and auxiliary information<br />
about Valhalla?<br />
Please rush your answer<br />
(before t get totally crazy) to the<br />
following address:<br />
Alexander Gromow<br />
P.O.Box 18507<br />
01000 Sao Paulo SP<br />
BRAZIL<br />
With my best regards I remain,<br />
Sincerely yours<br />
Alexander Gromow<br />
Printer commands<br />
Dear Mr. Elder,<br />
I was very interested to read Mr.<br />
Meikle's letter, which was<br />
published in the August issue of<br />
ZX Computing, concerning the<br />
Kempston Centronic Interfaces.<br />
As I now have both the standard<br />
and the 'E' interfaces, I thought<br />
you might be interested in my<br />
own experiences.<br />
The problems started when 1<br />
purchased a Star DPI 5 printer,<br />
and connected it to my 48K<br />
Spectrum with the standard<br />
Kempston interface. I found<br />
that, although I could transmit<br />
all the printer commands, including<br />
multiple ones, certain of<br />
these could not be switched off.<br />
Eventually, I found that by sending<br />
the initialisation command,<br />
the desired result could be obtained.<br />
but that this also ex<br />
ecutes a line feed. I also found<br />
that it was not possible to<br />
transmit graphics to the printer.<br />
The Kempston people, who<br />
were most courteous and<br />
helpful, advised me that this<br />
ZX COMPUTING APRIL/MAY 1985 7<br />
was due to differences in the<br />
ASCII character sets of the com<br />
puter and the printer. As a direct<br />
consequence of this, I decided<br />
to purchase the 'E' interface.<br />
After my initial delight at being<br />
able to send graphics to the<br />
printer and produce screen<br />
copies four times the normal<br />
size, I found that the interface<br />
just would not transmit multiple<br />
printer codes, even though<br />
Kempston say that it does. 1<br />
believe that this must be possible,<br />
but have not yet been able<br />
to find the method. This is probably<br />
due to the poor instructions<br />
which accompany both<br />
the printer and interface, a com<br />
mon fault with a lot of<br />
peripherals and software. Any<br />
suggestions please?<br />
Yours sincerely<br />
J. F Tydeman<br />
Can anyone help? Unfortunately<br />
Kempston ask for all their review<br />
samples to be returned, so we<br />
can 7 investigate Ed.<br />
Metpiot<br />
conversion?<br />
Dear ZX Computing<br />
In your October/November edition<br />
you published a program<br />
called Metpiot written for the<br />
ZX-81 by David Lockyer. I spent<br />
many hours typing in the program,<br />
which I may say looked<br />
particularly impressive, and was<br />
on the final column of the commands<br />
having completed the input<br />
of the map of the U.K. when<br />
my dodgy old RAM pack finally<br />
gave up the ghost. I have decid<br />
ed after much heart searching to<br />
commit my dear old, nonloading<br />
'81 to science and buy a<br />
Spectrum, although it will be a<br />
mite strange to walk into any<br />
computer shop and buy software<br />
with ease instead of that<br />
intake of breath and the<br />
depressing words of "No mate,<br />
there's no call for ZX81 programs<br />
anymore.'' I will no longer<br />
have to suppress the urge to<br />
stab the smug assistants.<br />
There are two questions I<br />
would like to ask you or your<br />
readers<br />
1. Is it possible to alter the<br />
Metpiot program to use it on the<br />
Spectrum?<br />
2. I have a fairly extensive<br />
range of software both<br />
homemade and commercial that<br />
are written in BASIC. I recall<br />
sometime ago reading about a<br />
program called Slowloader that<br />
translated 81 programs into<br />
Spectrum ones. I wonder if you<br />
have heard of the program,<br />
where I can get it and does it<br />
work? I would be heartbroken to<br />
WELCOME<br />
Apologies<br />
To Thurnall (NOT Thurnell) Electronics,<br />
for neglecting to men<br />
tion their address and telephone<br />
number along with the other<br />
details in the Disk Drive compel<br />
leave the lands of the Black<br />
Crystal unexplored or have to<br />
pay another "tenner" for the<br />
same program.<br />
An error published in Metpiot<br />
was that the array DIM D$ (32)<br />
on line 30 should have read DIM<br />
D$ (72).<br />
Trying not to grovel too much<br />
I would like to say that as a<br />
disillusioned ZX81 owner I<br />
would like to say that your<br />
magazine is the only one that<br />
has remained true to us early<br />
Sinclair pioneers. As others<br />
have destined the ZX-80 and<br />
81, both of which I have<br />
possessed to an untimely<br />
demise you have ptodded on,<br />
unheeding of the rabble and<br />
have in my experience built up a<br />
reputation of a Magazine that is<br />
interested in supplying information<br />
rather than advertising<br />
endless Spectrum games that<br />
make the ZX-80 and 81 owners<br />
feel like a Mediaeval Knight in a<br />
Space Invader game.<br />
Yours faithfully<br />
Robert Ager<br />
Now there's a project! Anyone<br />
out there converted Metpiot?<br />
Secondly, I'm afraid the<br />
Slowloader only worked with<br />
Issue 1 and 2 Spectrums, and is<br />
now obsolete. But welcome to<br />
the Spectrum dub anyway —<br />
Ed.<br />
Compac<br />
Dear Editor<br />
I think the program 'COMPAC'<br />
for the ZX81, by Rogers and<br />
tion. Thurnall can be contacted<br />
at:<br />
Thurnall Electronics Ltd.<br />
95 Liverpool Road,<br />
Cadishead,<br />
Manchester M30 5BL<br />
Phone: 061 775 5416<br />
Hogg in your October/<br />
November issue was fabulous. I<br />
especially appreciated the<br />
documentation given for the<br />
program, and I'm sure many<br />
readers will find new techniques<br />
for programming because of this<br />
documentation.<br />
I also think these two programmers<br />
are geniuses, and<br />
should be commended for their<br />
excellent work. Unfortunately, I<br />
do not own a joystick the full enjoyment<br />
of this program.<br />
Whilst lyping it in, I came<br />
across eight errors in your<br />
magazine.<br />
1) HEX LOADER PROGRAM,<br />
page 5; five REM lines should be<br />
listed, not four.<br />
2) HEX LOADER PROGRAM: it<br />
appears to me that the last line<br />
of HEX DUMP was printed by<br />
mistake.<br />
3) LINE 250: add inverse<br />
minus after inverse MAZE.<br />
4) LINE 265: change the<br />
spaces to '.<br />
5) LINE 9999: 32 graphic<br />
characters #131 [graphic<br />
shifted 6) must follow the<br />
semicolon after ESSENTIAL,<br />
6) Customising column page<br />
102, second paragraph: I<br />
believe that the last line should<br />
be;
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