(C) Vova KULIBIN
Music: OHRENETX (C) Mitchell / LS (R) DGN
In the Startup "PENTAGON 128"
To place Autoplay TR-DOS when you reset
computer, you need to reset the signal set
trigger TR-DOS'a (D76.2) to zero. To do this, cut the reset
signal from the four legs of D82 (LI1) and feed it through the
diode 13D76 KD521, KD522, or similar. If the diode at hand was
not, you can use the following free item D82.4 as follows:
- Vypayat diode VD2,
- Connect 11D77 (cathode VD2) with 13D82,
- Connect with 13D76 11D82, reset c 12D82.
Next, solder the capacitor 200 pF
between the 10D76 and housing (the hole under it on the board
there). In addition, the signal C36 should be high status, this
can be achieved by cutting leg 12D62, soldered in a gap
resistance of 300 ohms and resistance 500-1000 Ohms between the
10D83 and bus plus power. If you do not have the necessary
elements, you can use a free element or microchip D65. As a
rule, setup does not require, but in some cases
there is a need to pick up the capacitance between
13D76 and housing, and solder resistance 10
ohms between 4D82 and 5 in. Virtually all of the 128-th program
in such alteration work fine, though there are some who do not
recognize the car for 128K. They should be run through the main
menu. Would be better if those who wrote them, would write
something for calculators.
*
Often "Pentagon 128" at elevated supply voltages 5,5-6,0 V
(as at 5 "Pentagon" usually do not work) and on our drives
refuses to format disks (usually off servo format on one side)
or a bad format. You can fix this by replacing the resistive
matrix on the same par value 500-1000 Ohms. If no other matrix,
then it can be replaced resistances of the same value, embedded
in panel between the legs as follows:
1-16, 2-15, 3-14, 4-13, 5-12, 6-11, 7-10, 8-9.
It is possible that in your case 8 resistors and
do not need, sometimes you can do 4-6'yu, but
better to put everything.
Yes, will not rust your soldering irons!
lniki!
