ZX-News #17 03 декабря 1996

ZX Клоны

Letters - What are ZX'y ... : 48K, Moscow, Baltic, Moscow, 128K, Leningrad 1, Pentagon 48.

            Letters from readers



            (C) Pavel Sokolov



           What are Zx'y ...


                 Part I.


  So, you decided to read my article on
leisure time, I hope you like it, so
as there is something for the overall development and
not only ... In it, I give my personal
IMHO on subj'a, as well as IMHO those
who helped me in writing this article.


  I do not work (yet) for a single firm,
generating any computer, so my opinion is absolutely neutral 
and does not can be regarded as advertising or anti ...



  The first computer that I learned was
LENINGRAD 48K, but in general, this whole "saga" with the 
production of new models in our the country has started (again, 
to my knowledge) in 1988 with "MOSCOW 48K. 



                MOSCOW 48K

         (Moscow, of course)


  Year of occurrence - about 1988. This model is the most 
complete copy of the "ZXSPECTRUM 48K, RAM collected at eight 
565RU5 and eight 565RU6, that is, as in the corporate computer. 


  The same inhibition of the processor addresses
from 4000N to 8000N (16384-32767), although the organization of 
its work was done in sinklerovskom original. 


  Yes, even in the Moscow-48 "312 lines per frame,
that, as it were a standard. In general,
According to eyewitnesses, it is quite difficult to
adjustment, and on the board a lot of "fixes". In
Therefore, this model was distributed only in Moscow and to St. 
Petersburg almost came ...



                  BALTIC

               (Vilnius)


  This model was garazdo easier to configure than Moscow, the 
circuit easier, the presence of port scheme KR580VV55 
significantly enhances the computer. But m / s K556RT4 and 
K155RE3 complicated distribution of "the people" of this 
machine, and the various "innovations" in the memory with a 
frequency 4 cycles MHz is not the best thing you can think of

for ZX-Spectrum.



               MOSCOW 128K

               (Moscow)


  This is the first car with 128KB memory. The circuit has an 
interface printer LX-PRINT, Kempston joystick, a full RGB 
signal. And the disadvantages, such as "is failing" memory and 
difficulty in tuning, not added to her popularity. 


               LENINGRAD 1

  (St. Petersburg, the author - S. Zonov)


  This is already very well known and popular
model. Her dignity - Input from the tape on 521SA3 that 
provides good quality reading from a tape, as well as simple 
scheme did Leningrad 1 "is very popular among the diskless 
Speccy. This is not could prevent even a fairly serious

Disadvantages: wrong addressing of ports
and the complexity of any extension.



               PENTAGON 48

         (The name he received from

   pentagonal layout dirt tires)


  And it already has a controller BETA-DISK

                interface!


  "The Pentagon 48K" a little less common (and maybe more) than 
the same LENINGRAD 48. " On the one hand, the machine is not 
quite correct addressing of ports, faulty memory, lack of 
RGB-shaper and lack of on-board system connector, and

on the other - to enter with a tape recorder through K561LN2 
chip (CMOS cell), small Revised for the TURBO-mode and, of 
course, availability BETA-DISK interface'a.



  Then, some time in the markets of Moscow
and St. Petersburg were sold several
New on _tem_ times, types of machines, such as the Lions 48K 
"," Kharkov 48 "(with separate fields of memory)," Krasnoyarsk 
", and so on, but they are virtually unknown

all for the same reasons: the complexity in setting up / 
tuning, the "extra" flash ROM, a small flexibility to empower 
the machine and the lack of system connector on the board.



  Ending in the next issue.


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