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Inferno #04
22 июня 2003 |
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Pentagon - Instructions for remaking the Pentagon-128 to exit at Reset'u in the 0-th bank ROM 27512.
(C) U # 74
MODIFICATIONS
Pentagon-128
to exit on a Reset'u
0-th bank ROM 27512
with all the consequences:)
This creation is designed to
anyone can solder yourself this feature,
even if he had seen a soldering iron 2 times, and
something on TV:)))
Pluses of this revision:
- Do not burn on any new m / s circuit;
- 128 Basic is finally at rest;
- You can now enjoy a well-posed
work with service firmware Gluk Re
set Service, Madrom etc.;
- Yes, even the wheel full;).
Cut-Here ---------------------------------- WARNING! Most
rational course of action for the doubters:
A. First, read everything carefully with the card
in his hand and, if necessary, put a thin
marker notes in the right places ...
B. Most importantly - carefully! Only
Under these conditions, you can not
find yourself a headache to find a snot
etc.
C. Use a liquid flux of rosin and
denatured alcohol (alcohol economy), rosin powder is dissolved
in a heated in boiling water denatured. Color of the solution -
from light to dark brown, but still more or less
transparent and not dense.
The best containers for storage and use -
empty and clean the tube of nail polish with
brush. Where did you take, I do not
care ;))))
D. Before soldering, apply (a little) flux
the place where you are going to solder. This saves from the
nozzle and makes soldering process more effective.
E. After soldering, wipe the place where payali,
same denaturkoy, alcohol or solvent.
F. Do not be lazy to check things out before filing
Power on the board.
G. Legend:
DD77: 11 - 11 foot chip DD77, etc.
Cut-Here ----------------------------------
Let's start in order:
1. Carefully, without snot, vypayat R13 and
VD2 (located near DD89-ID4), see Figure 1;
2. Unsolder leg C3, going to the anode (plus)
diode VD2. That is the wrong foot, which is not
to ground:
DD89 (ID4)
-GND
1-2-3-4-5-6-7-8
* (-) (+)
VD2 * cathode anode
R13 + - C3 * <
O O O O O O
| |
| |
| Unsolder Fig.1
| I ----
Soldered HERE
3. Solder in that leg C3 mounting
hole, where earlier there was a cathode (-) VD2.
Ie join C3 DD77: 11 (LL1).
4. Overturn a fee to the side of chips and start a brutal:)
massacre ...
5. Cutting the track, going to the DD77: 8
right next to that same leg.
Ie terminates the connection DD77: 8 and DD82: 5 (LI1)
6. Cutting the track between chips
DD76 and DD82 after mounting holes
closer to DD82 (a hole under the foot C20,
which is usually not soldered)
This track runs between 5 and 6 feet
m / s circuits DD76, passes through a transitional
hole and then goes on between 9 and 10 feet
m / s circuits DD82.
Track links DD76: 10 and DD82: 6
DD76 (TM2)
~ -4-5-6-7
about
C20 (270Pf)
o - - o - can be
cut - X C20 is not soldered
~ ~ - - -9-8
November 1910
DD82 (LI1) Fig.2
---- 7. We cut the track, going to 27
feet ROM 27512 (DD36: 27) from the DD83: 8.
~
O
DD54 (p ^ 2, RF5)
cut - X
~
O
~
O
DD36 (27512,27 C512)
~
~
Fig.3
----
Truncated, the massacre is over ...
Overturn a fee to the side of the conductors and is taken for
proper soldering. The wire is advisable to use brands MGTF
and a small section (eg - 0. 12),
because of its isolation does not melt.
8. By DD77: 8 (LL1) throws wire on the mounting hole between m
/ schemes DD76 and DD82, where they cut the track (see Figure
2). Ie communicates DD77: 8 (LL1) and
DD76: 10 (TM2).
* C20 | ~~~~~~~ * C20 may be
DD77 TM2 is not installed.
|
August 1 | 10 -
oS
DD76 Fig.4
----
9. From the mounting hole in which
previously been soldered into the output capacitor C3
now living in another place (see Fig. 1 and
Item 2. and 3. this manual), throw
wire to the DD82: 6 (LI1).
Ie join DD76: 13 (TM2) and DD82: 6 (LI1).
DD82 (LI1)
/ Reset 4
(C39) '6 13 - TM2
5 oR
until
no ~~~~~~~~
connected
Fig.5
----
10. On the output of C3, where he is now soldered
(Formerly the cathode VD2), throw a wire
DD82: 13.
T.e. connect thus DD77: 11 and DD82: 13
11. The mounting holes where the earliest
was soldered into the output resistor R13 (the one that was
opposite the second leg m / s circuits DD89 [ID4], and was
connected to the DD78: 13 [AG3]) throw the wire on the DD82: 12
(LI1). T.e. join DD78: 12 and DD82: 12.
12. By DD82: 11 conducting wire to the DD82: 5.
As a result, the Pentagon's scheme of the native host interface
with a disk interface takes the following form:
C3
DD77 DD82 DD82 DD76
November 13 / Reset 4
1 '' 6 13 -
May 12 oR
11
12
LL1 LI1 LI1
11
+5 V
DD77
DD78
1 August 1910 -
G1 12 oS TM2
|
AG3 |
| * C20
| Can be
not
Figure 6 is installed
----
11. By DD62: 12 (TM9) throws wire on the vias, leading to the
DD36: 27 (ROM 27512).
T.e. sends a signal C36 at 27 feet ROM.
28 27
oo o o
about
| About
here payaem wire from the DD62: 12
(View from the conductors)
Fig.7
----
12. The following is desirable (especially if the regime
"turbo"), but not necessarily (At least, I do without it all
works well) - cut off from the first
feet ROM signal / DOSEN, coming from the DD83: 11
(DD84: 5), and to apply for this leg (DD36: 1)
signal directly from the DD76: 9.
13. Flash the 0-th bank service firmware ROM 27512 (Gluk,
MadRom, something else) and enjoy the new features of the
computer. Because if you empty the 0-th bank,
that excuse ...
The End
------ Sources:
AXLR (Alexander Kormishin), 1998-1999
"Further development of the controller to work with HD-drives,
option # 2";
T (c) S, 2001
scheme Reset to Gluck. "
(A small piece of paper)
Vojager # 1
(C) Vova Kulibin
Startup in the Pentagon-128 ""
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