Amazing #01 29 сентября 1997

Программирование

Assembler - nachinyuschim: playing music on interrupts, running line and the procedure for hours.

Section: Assembler
Text: J. Jury
Music: IRONMAN
Information: Mr.Beeper, Activator.



  Probably everyone who is just starting to study
chat assembler, faced with this problem. HEX - system.

  I will say frankly that there is nothing surprising in the 
normal "human" relation to this system. But still, I'm sure 
that the more you communicate with your SPECCY at assembler 
level, the more will change your attitude to HEX - system. It 
is simply inevitable. 

  Now imagine that situation. man
going to, say, abroad. How to get to know
of unknown country, about the lives of people who live there, 
and get the most from your trip? 


  Of course, if you know the language. After this
You to discover the many nuances that you
would never have learned otherwise. You will have
not "understand" and "feel".

  The computer "talks" in their language
and if you want (and in fact you certainly want to!) learn more 
about it, do not even know and "feel" it, learn its language -

hexadecimal system. And the way here
only one - as much as possible to "talk"
in this language - to work in HEX system.

  Try, for the sake of interest to undertake such
experiment. Everything connected with assembler, write only in 
HEX - system, and only in it, even if at first be

difficult. At least a week. After all, how
natural to write elegant:

        LD HL, # 4000

than absurd: LD HL, 16384

and so on. I am sure that within a week
Work on the assembly of HEX - system in place: LD A, 2

You will want to write:

        LD A, # 02

And things such as loading a register of BC
length and the opcode TR-DOS:


        LD BC, # 2005

generally looks natural and you do not even
come in a head load registers B and C
separately - it all happens at
subconscious level - you will
sixth sense!


     In general starting with this issue, we


  you try to make small,


  but beautiful DEMO, and if you then go on it and


  send to our office, it will be


  inserted in the application log!


         So, all in order:


The first thing to do to us, it's mouth
novit attributes that make tsykl, and tsykle

Poll SPACE key to exit in TASM.



        ORG 25000

        XOR A; installation

        OUT (254), A; attributes

        LD HL, # 4000;

        LD DE, # 4001; and clear screen

        LD BC, 6144;

        LD (HL), L;

        LDIR;

        LD BC, 767;

        LD (HL), 7;