(C) Dmitry Terentyev
Problems of development of the Spectrum!
In this article I want to review the highlights of interfering
Development of Spectrum, according zhelezyachnika.
1. The main problem - is that all the improvements, all
bells and whistles are based on 128-x, and then at 48-s models
Spectrum. In the end, the computer's motherboard is like ...
even I do not know what to compare with ... in a cocoon
caterpillar. Like this mess - two or three stories entangled
chips pile of wires, it is a heap, rather than bundles, cables.
Not bad if you wire MGTF (MGTF rulez Forever!), but I for
example, the presence of this wire problems (by the way, if
anyone knows - it pink or white, translucent, does not melt the
soldering iron, which is rulezom, as well as poorly cleaned,
for which I never liked him before, but Now I e podplavlyayu
lighter and it turns out very well!).
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!
If anyone knows where I can buy this wire and can help
with its purchase, please contact me at the editorial board.
Thanks in advance.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!
What is the result of this outrage:
-Difficult to repair, if the wires can move, then get close
to the chip of the first floor pretty hard.
-If the wire is not MGTF, then the repair can damage the
insulation wires (proplavit, float a few wires).
Poorly-soldered the wires are in the habit fall off, especially
bad when it prishodit for repairs and you do not notice it in
time. , And generally bad form.
Global solution:
Dilute-board with reasonable and necessary extensions of
and with all the modifications. I heard about the Ukrainian
project of the Pentagon board: the meter memory to the
symmetry, Kempston mouse, something else plus the entire DMA
Ultra Sound Card on board. It was even offer to Scenergy
admission orders for divorced board, I would buy myself a
miracle, but ... But a letter requesting all characteristics
and conditions of purchase, as well as the timing of order, I
never got an answer, sadly. Rumored project stalled completely.
At the moment, the Pentagon has started another project board
pentagon1024.narod.ru project site visit please read, support
the author's kick it (in a good way). The board assumed meter
memory symmetric 512kb on port # 7FFD everything else # 1FFD
plus disabling ROM standard scorpion, Kempston mouse, and slots
with buffering. I think we need to add two graphics mode "Iron
multicolor" and "512x192 mono ", chips added to a minimum, and
enjoys enormous, so that who agrees with me please write to the
author about this project, I made that he has already said.
Just recently (February of this year), I learned
on another project. The Pentagon, too, but with the already
adopted addressing one megabyte of memory (so-called "meter on
Pentagon "or" meter for # 7FFD). Project participants to open
I have no right, as the permit is not received, but who
necessary, those they know. Good luck to you guys, for my part
will render possible assistance.
But the solution to this problem gives rise to another, where
divorce FEES! But it seems some have found a solution to the
guys from the group NEDO-PC TEAM (if not mistaken), now they
can be ordered bare board with a computer chip sewn CL
ATM-TURBO some version (can not remember) for 700 rubles and
the hdd-controller scheme (c) Nemo, 200 rubles-naked fee, 300
euro-assembled controller. All questions and the request is
sent to the address cr0acker@mail.ru
^
(A zero)
details and other information, please visit
atmturbo.narod.ru (hello Maksagoru) in the "Message".
The same way I received a letter from the handouts. The
authors do not indicated should print it in the newspaper or
not, but I think we should and must, as not all have access to
the Internet, so that See "Announcements".
2. At Scorpion'e this problem partially solved by
SMUC'a, supported by a floppy image tr-dos through # 3D13,
respectively, which gives rise to the problem: Can not execute
a program that are designed for direct work with the VG93.
It would seem that there is no solution to the problem. I'm
the same as previously thought but a couple of years ago I had
an idea how to solve it, and apparently not one to me (so I
invented the wheel;)), the principle such action, citing an
article by Maxim Timonina "TR-DOS and the hard drive - a
solution", Paragraph # 21: "It was decided to implement not
only intercepting calls to the drive in the above point
(Editor's note.: # 3D13), and do it at a low level,
specifically at the ports that are known to can be reached only
indirectly (Editor's note.: that is not directly but through
the ROM tr-dos through a point or # 3D2F # 3D30, and here here
is the salt of the idea). In fact, this meant writing a
software emulator chip 1818VG93. "
More information about the mechanism of interception read the
article referenced above.
Floppy image is located in the upper memory, respectively,
must be at least 256 kilobytes of memory, as well as the
ability to read ports of memory expansion.
Load / unload the responsibility on any operating system, for
example, iS-DOS or CP / M anyone they like, or if someone will
develop another operating system, again with the support of the
hard drive. Personally, I popolzovavshis iS-DOS on your hard
drive, was pleased with the result, I now no HRC nafig not
needed, it remains When the printer repair!
Flashing a new TR-DOS is ready (for an ATM Turbo 2 (+)), she
be published on the site http://atmturbo.narod.ru with sources
and description of improvements under the other clones. I am
willing to make such a revision to the Pentagon, if I send the
firmware and source code by regular mail on a floppy disk in
any format, so as access to the Internet, I now do not (that's
how poems speak). But there is every opportunity to adapt the
new version tr-dos: a head on their shoulders, the virtual ROM
and programmer.
3. ROM - read-only memory or ROM - read only memory is the
most important component in the computer after CPU. For
example, even without the computer's memory can operate in the
presence of the program Rom. Just ROMs can replace a range of
components. For example, the computer pros p ^ 2 produces the
various signals. In a word ROM thing necessary and universal.
Using these devices hampered by the lack of programmer.
Self-assembly is difficult for ordinary users, only by
experienced electronics (in the ZX-Ferrum # 4 will be an
article "Gather yourself programming"). It only remains to find
who has in stock this device - it can be "Zhelezyachniki, or
some firm to assemble any electronic devices (eg, cash, or
running lines, etc.) but in this case it may be too expensive
(by known According to me about 250 p)..
If you do not get any expensive, come to
I (see "Announcements") or try to negotiate with NedoPC team
(address see ibid.)
Well that's all. I did not touch upon the theme graphics,
sound, etc., so as it has minor problems, because not having a
material base (hardware) get upset about stupid malekom
resolution screen and lack of color when it is not even a
little.
