PROFI CLUB - The scheme of the complete decoding of ports of extended memory for Profi and not only ...

<b>PROFI CLUB</b> - The scheme of the complete decoding of ports of extended memory for Profi and not only ...

(C) Musa Khaybullin / Star Vision
Music: BY ZHENYA/ZER0



        Scheme of full decoding of ports

         extended memory for Profi

                and not only ...



     Let's start with a little history ... About summer
In 1994 I got Profi v3.2, 128 KB
RAM (for 3 in a row computer!, And I started with 48
"Leningrad"). With 128 KB I spent a short time, somewhere
until mid-1995, and then changing the two lines
RU5 on RU7, began to enjoy working in 512 KB
mode: chase CP / M and iS-Dos in the framework of the disk. 
Soon I often noticed that some of the bend, especially 
muzykalki very disliked included 512 KB. It soon became clear 
that the authors of these same programs are not treated very 
well :-( to 128 memory and muzykalke, causing breakdowns port 
Extensions for Profi - spontaneously includes an advanced 
screen, disable ROM, etc. 


     In mid-1996 have appeared in Tashkent 16 rooms 
Spectrofon'a, where the "designer" Kirill Gromov A very 
convenient shemka to eliminate these glitches. Quickly 
establishing her a long time I enjoyed working in Honey 
Commader'e with a resident in the memory ;-). Around the same 
time began to appear programs using 6 and 7 bits of port # 7FFD 
to work with 512 KB. In a short time I had is also currently 
installed. And faced with the biggest glitches in the world! If 
the use of decoding from a standard # 7FFD for this port, then 
stopped working altogether Digital Studio and similar music 
editors, although we guarantee 99% compatibility and bug-free 
operation this port. In general, if I had occasionally (after 
processing) accounted for the extended off memory, then after 
installation # 7FFD, it had do with each fourth program. Soon 
it to me violently sick, and this port, I installed a complete

decoding.



     After a while my friends have
me some very nice features of the port
ATM-TURBO 2 + - # FFF7. He could always be (!) Is included, it 
is not constantly had to turn off, as other ports of extended 
memory, and it is by no means not affect the operation of all 
(!) without exception programs. And most great - he had the 
support Honey Commander. Soon, this port is also

I was standing. In this case, I had to use
many small chips, and not just the logic that
looking at my baby, I was sick ... What
would have been a great board Profi, hang as much
corps I was sorry. :-(



     After much deliberation it was decided to drive
more than half mikruh in RT4'ye, they saved a great place 
though and more to eat. As a result, and what appeared scheme, 
which in text format can be found in the appendix of our 
magazine. 



     Here is a list of used parts:

 D1, D4, D8 - K556RT4 D2 - K555TM8
 D3, D10 - K555TM2 D5 - K555LN1
 D6 - K555TM9 D7, D9 - K555LL1
 D11 - K555KP11 R1-R9 - 1,5 kOm.



     Output Q0, Q1, Q2 must be submitted wherever
earlier were bits triggers the memory management in
case with the pros, the inputs LI3.



     The outputs from D1 are as follows:
 12 foot - a signal sampling port full decrypts
           tion pros and ATM-TURBO 1;
 11 foot - a signal sampling port full decrypts
           tion Pentagon 512;
 10 foot - a signal sampling port full decrypts
           tion Scorpion 256;
 09 foot - a signal sampling port incomplete decrypts
           tion Spectrum 128.



     9 pin m / s D1 only need to
free extra elements on the card and then use them on your own.


     Firmware m / D4 encompasses a whole bunch of
LL1. Therefore, in this scheme has its own peculiarities - if 
you include bit on some port, then if you please turn it off 
before going to another expansion port. Although with this 
you're unlikely to run because the driver hotplug memory test 
memory at a time, and if a port exists, then with him they will 
work. 


     Now I will tell you about some of the features of the port 
# FFF7, for example, to include a page of memory, you need to 
write a bit "0" instead of "1", as usual.



     When you set yourself this scheme, then it can be Tested 
with Test v4.21 by CompoWellcome, which is located in the annex 
zhurnala. The annex also are flashing RT4, respectively:

 in D1 - RAS512,
 in D4 - 512SMS,
 in D8 - PRFFF7, which are specified in the scheme and my
RF5 firmware v3.2 for the pros with the "Pentagon"
INT'om and wide border. Now and then, hopefully,
all, like, it should be clear. If you have any
any questions, please contact me at the address fidoshny
2:5085 / 1.65 in the name of Musa Khaybullin aka Star Vision.



                 *



               Attachment # 1.



           Ports Extended Memory:


    # 7FFD (write): # 1FFD:

 bit 0 - PAGE 0 bit 0 -
 bit 1 - PAGE 1 bit 1 -
 bit 2 - PAGE 2 bit 2 -
 bit 3 - SCREEN 1 / 0 bit 3 -
 bit 4 - ROM 0 / 1 bit 4 - EXT PAGE 0
 bit 5 - BLK PORT bit 5 -
 bit 6 - EXT PAGE 0 bit 6 -
 bit 7 - EXT PAGE 1 bit 7 -


    # FDFD / # DFFD: # FFF7 (from Tr-Dos):

 bit 0 - EXT PAGE 0 bit 0 -
 bit 1 - EXT PAGE 1 bit 1 -
 bit 2 - EXT PAGE 2 bit 2 -
 bit 3 - bit 3 - EXT PAGE 0
 bit 4 - bit 4 - EXT PAGE 1
 bit 5 - bit 5 - EXT PAGE 2
 bit 6 - bit 6 - ROM -> # C000
 bit 7 - bit 7 -


           # FFE7 (from the Tr-Dos):


         bit 0 - EXT PAGE 3

         bit 1 - EXT PAGE 4

         bit 2 - EXT PAGE 5

         bit 3 - EXT PORTS ON / OFF

         bit 4 - INT FIRM / RENT

         bit 5 - ROM DISK ON / OFF

         bit 6 - ROM PAGE 0

         bit 7 - ROM PAGE 1