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║Section: Discussion; ║
║Article:Interview; ║
║Music:Dreamer; ║
║Text: Getmants Vladimir Mikhailovich. ║
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There are many questions in the mail of our magazine,
addressed to the Kharkov developer
hardware for SPECCY - V.M.G. We decided
forward these questions to him personally at
in the form of an interview.
- If possible, tell us more details
about myself. How did your acquaintance happen?
Comfort with "ZX Spectrum"?
V.M.G.: - I became interested in computers from childhood
years when the word "computer" already existed
vovalo, but the computers and literature themselves
there was almost no mention of them. I remember, with great difficulty,
home took out several books on programming
education and learned them almost by heart.
Faculty of Mechanics and Mathematics
Kharkov State University, worked
programmer in one of the “boxes”, in the same place
mastered the basics of circuit design.
Then he started teaching
activities and temporarily left the company
pewter affairs. Return to them again me
caused the appearance of SPECCY. Elemental
the base of this computer is made of the simplest de-
hoists of domestic production itself
was asking for improvements.
Then in Kharkov they were knownonly
models "Spectrum 48K" with separate
memory fields. In these machines, microcircuits
565RU5 were only half used.
Therefore, my first development (it seems
it was 1990) concerned substitution
unused part of RAM instead of ROM.
Now I would simplify this scheme times
two, but then he was very proud of his work
that one. Then from some Polish sources-
we managed to find out the principle of the device
"Spectrum 128K" and get a primitive
musical co-process connection diagram
sora. This is where it began for Kharkov residents
era of 128 cars. The first toys on 128K,
I remember they loaded it from a tape recorder and from 48 ROM.
- How can I get the complete list
your developments?
V.M.G.: -I will send it to any reader who-
who will send a letter with a blank envelope
inside at the address: 310022, Kharkov-22,
PO Box 10899, Getman Vladimir Mikhailovi-
ch. Some circuits have printed
boards, but I have not assembled devices yet
I'm sending.
- One of the readers complains that
he assembled the device according to yours
diagram from "Spectrophone" No. 17,
but it doesn't work.
V.M.G.: -Before releasing the diagram, I
I'm testing it at maximum
number of machines. Moreover, if the circuit with
showed over timenot 100% working
property, then it is withdrawn from circulation.
This, in particular, happened with the releases
No. 3 and 5 (512K and TURBO in cars with
separate memory fields).
As for specifically “spectropho-
new" circuits, then expanding the RAM to 512K
computers with a shared memory field -
fully working circuit, tested
on hundreds of machines. The pseudo-ROM circuit contains
there is a non-fatal glitch that is easy
works around it programmatically (I didn't fix it
to keep the circuit simple).
All misunderstandings are most likely you-
are called the mismatch of notations on
diagram of all computers in different cities.
By the way, I use the author’s (plotter-
noah) Pentagon diagram, where the Z80 addresses
For some reason they are designated as A1...A16.
- Are they preparing (and what?) more
improvements for SPECCY?
V.M.G.: -The work is almost completed
(runs on other cars, written
software) over complex
revision of "THE LAST CHANGE OF SPECCY" -
the result of many years of searching and exchange of information
formation in the area optimal for art-
architecture "ZX Spectrum" changes it
graphics.
A special feature of the modification is the reserve
establishing the possibility of its phased installation
injuries. Let me explain. At the FIRST stage there is enough
exactly solder (on top of those in the kit)
PC) minimumrequired number
microcircuits. In this case, we get 2 additional
graphic modes: each precise
in your own color, 16 colors, resolution
256x192 (24K) or 256x96 (12K). So that these
regimes were suitable not only for considering
of statistical pictures, the same
microcircuits perform 2 more important functions -
tions "Unraveling" addresses - write down, for example -
For example, in the register L x-coordinate, in H - y and
place a dot on the screen at (HL).
Using ROM address space
for new screens.
Now, firstly, it doesn’t hang uselessly -
but, as before, and, secondly, there is no need to use
be called by the page register when filling out
nii of the second screen.
At the SECOND stage you can connect
TURBO mode (7...28 MHz, depending on
quality of your Z80).When moving to new
according to the graphics, the mode initializes itself.
Real computer speed
you know, the increase will not be that significant -
but...
Therefore, at the THIRD stage, instead of the second
swarm pages into the area #8000..#BFFF under-
pages of independent (for example-
measures of static) RAM.T.c. up to 90% of the time
not a processor is spent on fetching instructions,
then the program written to this area
will run in TURBO mode at 2 and
more times faster.
In the old pages (all remain) it is convenient
but store the transferred data.
It should be clarified here that the user
the body is free to decide whichstages of pre-
boots and in what order should he do it. From-
the absence of any part of the improvement, in particular
first, it is easily determined programmatically, and,
secondly, it will only lead to distortion
colors or to “slow down” the program
we. Moreover! Can be assembled separately
circuit for fast RAM or straightening ad-
res (two microcircuits, “PROFI” has four)
and do not create new graphics modes.
At the FOURTH stage you can: finalize
video output scheme up to 256 colors, set-
turn up the palette register, add multicolor
lore (attribute) modes of increased
permission, do direct, mi-
Nuya TR-DOS, access to 1818 VG93, etc.
Some of this package of schemes assumes
can be published in the magazine "FAULTLESS",
the rest can be ordered from me.
- Will this modification be compatible?
with a video processor, actively discussed
expected on the pages "ONLINE".How
do you relate to this discussion?
V.M.G.: -I’ll start with the second question. Much-
summer presence on the market of ideas taught
I am calm about everyone's rights
the user has his own views.
Some want to have an improvement, even with a mini-
small software, but sub-
keyed by no more than two wires.
Others are ready (and eager) to flip on
computer board is all upside down. For 3
decisivefactor-minimum price.Four-
you are ready to pay any money, but
Max. software.etc. and
etc. It's as natural as that
some prefer blondes, others prefer
burning brunettes. Worse, what many think
and try to prove to others "scientifically
point of view" that their preferences are
the only true ones. This only leads
verbal skirmish with transition to personal
ity.In order to participate in the dis-
discussions at a level no higher than “but I like-
it’s like this!”, a minimum level is needed
professionalism. For example, don't boast
because you don't know how to decipher
abbreviation "PDP", and look at the nearest
best reference book or don’t be shy to ask
ask other guys about it.
To the very idea of connecting a video process
litter from "Dendy" I take it calmly. Dora-
Botka "Last change" not only does not conflict
fusses with this idea, but I would also allow
remove from the discussion questions about "confused-
"of SPECCY addresses, low productivity
Z80, about graphics compatibility.
Another thing is that you can put forward a meeting-
new idea (and more than one): for example, insert
in "Dendy" "empty cartridge", connected
to SPECCY. If you want, load the game from the drive
ry (the end of the era of cartridge sales?), ho-
scratch - write idiots or toys.
In general, is it worth fighting with rivals?
nobody on his territory? Maybe he’ll stay
vimdendiku dendikovo, and efforts are concentrated
Are we focusing on 3D animation that is inaccessible to him?
I have certain experience in the field of
field of creating a 3D video processor, but -
this board is the size of "Leningrad". Ak-
Is it real or has the train left? I wanted
would like to know the opinion of your readers
magazine on this issue.
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