HARDWARE
SIMM-1MB════════════════════════ ═══════════════════════════════╗
description of the connection diagram for 1Mb ZOpin SIMM to "Pentagon" ║
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Swap: DD18:2(A8) and DD19:13(C34),
DD16:2(B11) and DD17:13(C35).
Old signals from the legs, where new ones go, should be cut off.
All 1533 series chips. Possible, but not recommended for
exchange for series 555. respectively. Instead of 15ZZKP12 you can put
15ZZKP2. VD diode - any low-power one, for example KDS22.
PYS(7) memory chips must be removed from the board (or storage
lock if the power supply allows you to leave them).
If there are any problems with regeneration (Pentagon
after all :) you can do the following thing: apply to IR22 (see above)
signal from DDS1: 4 passed through element LI1:
LI1
K43 ┌──┐
DDS1:4 ───┬──────────│ &│─────── on the 1st leg IR22 modifications
└──███──┬──│ │ (see above)
=== └──┘
│ 10..1OOpF
─┴─
Mikrik S2 (and el-t LI1) need to be installed if you are going to app-
You can quickly turn off the upper memory. And sometimes S1 is enough,
this is if the program does not understand all the standards for extended pa-
crush.
bit2 of port #EFF7 is software memory lock above
128K. If you have it on your computerthis port is missing, instead
signal, feed the common wire.
The processor address and data bus signals are designated as A0..
A15 and D0.. D7 respectively (be careful!).
It is also necessary to remove memory blocking above 48K. Removed
elementary: from DDbH: 11 bitS #7FFD is cut off and to this DDbH: 11
common wire is supplied. I haven’t had this 48th latch for half a year now.
torus and have never had any problems with it. True, come to me
I was able to see several ancient 48x toys that wouldn’t exist without her
worked. If, as luck would have it, among these toys yours turned out to be
darling :), it doesn’t matter - it’s also easy to solve. Here you can use
use a dual microphone as S2. Then it will be like this:
S2. 2
/
DDb2:15───/ ──┬─ on DDbCh:11
│
█1K
│
─┴─
Or replace this mikrik with a log element. I:
LI1
┌──┐
DDb2:15 ──────1│ &│3 ──── on DDbCh:11
bit2 #EFF7 ───2│ │
└──┘
Now when bit 2 of port #EFF7 is reset to zero, the memory is higher than 128
the 48th latch will open and lock. And when installing
its unit will deny access to memory above 128K and 48th for-
You can use the lye.
If your computer has a CMOS clock and ROM firmware is installed
"MadRom", then all these microphones can be removed and made software
control them from CMOS_SETUP.For more details, see help for the firmware.
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For Leningrad:
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Instead of B14 at KP12, apply with DD19: 4 instead of B15 at KP12
give with DD19: 7 instead of C14 to KP12 give /RAS with DD2: 9 in-
then apply C23 to gearbox 12 /H1 with DDZCh: 2 instead of DDb1: 1
signal from the 1st leg KP11 (upgraded to 128K), instead of DDb2: 9 feeds
send a signal from the 9th leg of TM9 (updated to 128K), instead of DDS1: 4
send signal from DD9: 8 instead of DD18: 5 feed to DD15: 3
instead of DDbCh: 1 serve from the 12th leg KP11 (updated to 128K)
on DD15: 6 instead of DD16: 5 and DD16: 11, apply ground to DD18:
3 and DD18: 6
* on the 15th leg KP11 (upgrade to 128K) it is recommended to apply
land,
having first freed it (leg) from H1 * from the 9th and 12th legs of this
However, KP11 is recommended to remove resistors.
It is still necessary to make the following modification:
LL1 LI1
┌──┐ ┌──┐ usually such an element LL1 can be
A14 ──│ 1│───1│ &│3─── ma DD9:13 found in the drive controller.
A15 ──│ │ ┌2│ │
└──┘ │ └──┘
DDZCH:2(/H1)─┘
This modification is necessary so that programs writing to the address area
owls #0000.. #Зfff did not spoil the 128th memory.
send the SIMM data bus to DDЗ2, take the address bus for SIMM
from the legs of the same name of the former PYS(7) these are legs 5, 6, 7, 9, 10, 11,
12, 13 /RAS for SIMM take fromDD2: 9 /CAS is taken like this:
LN1
┌──┐
DDЗ:3(H0) ──1┤ 1°2── on the 2nd SIMM pin
└──┘
The remaining element LE1 can be used as an inverter. And on
KP11s do not need to be swapped; in Leningrad such interchanges
There are no regeneration points.
Leningradov modification "memory expansion up to 128k". Has-
This means exactly the one in which CAS management is carried out
using KP11 and LAZ.
In principle, this is an analogue of the Pentagon control scheme
128k, but in L-skaya the Z-state KP11 is used. If it's still being worked on -
The Leningrad-clone being developed has a different scheme; it follows
climb.
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As you can see, the basis of this scheme is the Pentago-refinement scheme
at-128 to 512K by V. M. G (from Spectrofon-17). If SIMM is installed
on the 512th computer, then most likely you will only need to add unknown
a significant number of microcircuits and do not do the necessary for regu-
nerations of permutation.
Profi-port is used as expansion ports up to 1Mb
(#DFFD, mask #07) and Pentagon-1024 (#7FFD, mask #e7).
Instead of a 1Mb ZOpin SIMM, you can insert a 2Mb-ZOpin (checked).
You just need to apply ground to the 19th pin of SIMM (A19). Of course
Access will only be possible to the lowest megabyte. By analogy
In this system, you can also connect the CHMb-ZOpin SIMM (install another
TM8,KP12 and LE1), the problem is only in the real absence of a port and
software for this amount of memory. True, in STSb. 2 and ISDOS possible
memory usage under any ports, there would be a driver.
If anyone needs the above circuit or ROM firmware
version 5.12F (supporting 512kb), then call me, Hunter,
by phone in Mozyr: (02351) 3-55-94, Roman.
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