Energy #05 29 мая 1997

Железо

Metallurgy - Shama Overclocking Byte v1.0.

               METALLURGY



         (C) Falcon / Atlanta h.g.


           Dispersal 'bytes' V1.0



               Assembling scheme


    Fed to 10 pins D26
(LA4). With Controller TR-DOS we start signal
MOTOR (START) - 16 pins interface.
Capacitors C3 and C5 (on-board 'bytes')
removed, instead they are installed capacitors of approximately 
150 pF. Now You can mount the main circuit. Legend plug 
contacts are given by the scheme 'Bytes'.



              Work scheme.


    Increasing the speed of your computer
achieved by increasing the clock
frequency supplied to the processor. In this
If clock frequency is removed from the counter D1 '(divide by 
3) and equals .... 4,666 MHz (14 MHz / 3). Why so

?

  1. Increase the frequency to 7 MHz is connected
with a number of problems. In particular - to ensure 
operability of RAM. In computers, where the signals RAS and CAS 
are tied to the CPU clock, this problem elementary costs 
schemes delay the introduction of a processor memory access. In 
BEITEN RAS taken into RAM constantly, and CAS is formed from 
the signal Z80 - MREQ with delay on the RC-chain, which is why 
the introduction of WAIT-s almost impossible. 

  2. Not all of the Z-80 processors can ensure the normal 
operation on 7 MHz. 

  3. In many programs because of poorly crafted INT-can 
flickered and sprites. (Although it is observed on Bytes and 
the standard 3.5 MHz). 

    IC D2 'button, the clock frequency to standard 3.5
MHz when operating in the TR-DOS.

    Chip D3 'and D4 are managing multiplexer D2'.

    D4 'generates a strobe signal for writing
information in TM2 on the rising edge of clock pulse provided 
that the Z80 does not address at this moment to memory. 

    Replacing the capacitors C3 and C5 is required for stable 
operation of RAM for increased clock frequency. Perhaps they 
will also have to pick up. 



          Concept.


                    D1 '

          December 14

               C0 CT 2
8.D1 to 1 February 1911

    > C1 4

                             9

           June 6

                             8

                         12

           7

              D1-555/1533IE4



                   D2 '


           3

               B0 MS 4 to 10.D26
to 8.D19 2 Y0>

    > A0



          15

               EO

          1

               S



              D2-555/1533KP11



        +5 V ^ D3 '

                1

                    R 5

                2 T Q

                    D

                3

                    C 6

                4 Q C2

                    S


         C1 D3-555/1533TM2



                        VD1 CSROM

          D4 '> <
to 8.D26 VD2
 >> <MOTOR
to 19.D42 VD3
 > 3>

      2

    D4'555 / 1533LI1 S1


                      R1



                     +5 V


VD1-VD3 - KD521-KD522
R1 ------- 5-10 kOhm
S1 ------- any switch with detent

                            (TURBO ON / OFF)
C1 ------- 60-100 pF (select)
C2 ------- 100-130 pF (select)



    (C) Falcon / Atlanta h.g. 22.12.1996

              Andrew Panyutich

     Phone Pruzhany (801,632) 21,390

           All rights reserved



                      to be continued .....


    P.S. Initially, the scheme was prepared for electronic 
publication ECHO, but Due to the fact that the yield later date 
than the third is impossible due to lack of editor (word of 
VfNG 05/20/1997, I went with the SPECTRUM-but ...) is passed 
version of ENERGY.