PROFI CLUB - OS PROFI CP / M.

(C) Balbes



          COPYK AND ALL-ALL-ALL ...



                       Perhaps this article

                   someone like,

                 maybe someone can gain

               from it something useful.

              Perhaps, but unlikely ...


                                 I am MIGHTY



     Periodically pochityvaya magazines
ZX, I discovered the fact of injustice: such a mighty computer, 
which is PROFI, paid insufficient attention. This injustice 
must be corrected. So, PROFI v 4.0 (I have just such a)

has:


  - AY 8910

  - PIO KP580BB55A (COVOX, PRINTER)

  - KEMPSTON INTERFACE

  - 512K (UP TO 1024K)

  - COMPORT (MOUSE, RS-232)

  - ROM testing

  - The screen 512 * 240 1 byte Color / 8 points

  - Well, of course, the floppy disk controller


     Added to v 5.0 IDE controller
(Winchester, seen in the work, rules), the palette with a 
choice of all 16 colors out of 256 possible.

All versions of the profiles supported mode CP / M.
In the ZX, the complex is not distinguishable from the SPECTRUM
128. Therefore, go straight to CP / M.

 CP / M (CONTROL PROGRAMM FOR MICROCOMPUTER)



     This is one of the first operating system for PC. Rostral
was developed in 1975 and was intended
for installation on Ljubo computer with CPU 8080. Her
Dad instructor Naval Postgraduate School Harry
Kildalla. The system was so
successful that it has received widespread. Based on this 
system, folded it with the UNIX (working directory), a BS from 
MICROSOFT in 1981 wrote all forgotten (and packed) system 
MS-DOS, which is sunk into oblivion. With regard to PROFI

CP / M, then I allow myself to give a fragment
from its description ...


     For the convenience of setting on the computer any 
configuration, OS MikroDOS divided into two parts: Basic

Input / output system (BSVV or BIOS) and
Basic disk operating system
(BDOS or BDOS). BSVV (BIOS) - module
defines low-level interface
MikroDOS with a particular computer. Starting the OS by any 
command TR-DOS, read the disc (RUN, LOAD, LIST, CAT, ERASE or 
MOVE) from any mode (48 or 128). Need to register extensions 
have been unlocked (ON / OFF button is pressed - the position 
ON). Insert a floppy disk and type without parameters, one of 
the teams. The screen goes blank, and then it will in turn will 
see a message about loading drivers. After this, you will see 
the prompt: A>. We consider this process in detail. Initially, 
with the help of hardware and software TR-DOS, located in ROM, 
loaded a small program called the bootstrap and occupies the 
primary sector, the zero track drive system, the bootloader 
loads with the rest of the system Track SP-DOS, then control is 
passed to the system. The new version of the initial sector of 
the zero track with a system diskette takes a file BOOTK.COM, 
which is the bootloader, and it is already downloading files, 
which are recorded the system. Upon receipt control after the 
initial boot, the system performs the initialization of devices 
set using the team's home page transitions to the "hot start" 
(at 0000h) and BDOS (at 0005h), displays an initial message and 
searches the disk file CONFIG.SYS, whose presence on the system 
drive necessary to It identifies the driver download which will 
be implemented after the initial launch system. If this file 
exists, then it is assigned the console input. After, control 
transferred to a point, offering hot start system. "Hot start" 
- is operation, which installs

system parameters in the initial state
and transfers control to the shell, which, in turn, loads the
AUTOEXES.BAT (if any) and performs
recorded there team. As a rule, the last team - is to download 
file shell. At the moment the most widely sleduyushie shell

(Hereafter FD):

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