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│ "Lviv version": 512K! │
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(C) Hacker Raspillasshi-
Upgrade your computer's memory to 512K.
Literally two words about improvement. This
modification increases the amount of computer memory
tera from 128(48) kilobytes to 512. Choice of up to
additional pages are carried out either from
using 6.7 bits of port #7FFD (standard
Pentagon), or using bits 0.1 por-
comrade #FDFD and #DFFD (ATM and Profi, but not
I remember which port is whose:(). Selecting operating mode
bots are selected by a switch. All improvements
can be turned off by another switch
com.
Now that I've brought you up to speed,
we can start remodeling. To implement
reworking “in metal” is necessary
dish, wire cutters, tweezers, five meters
waters, as well as a diagram of the computer and expansion board
Rhenia.
First of all, you will have to get it somewhere-
be 16 microcircuits of type 41256 (domestic
new 5b5RU7 will not fit - they have little
other organization). I'll tell you where you can find them
find: such mikruhi are located in 286 PCs.
Found mikruhi need to be checked:
take out one of the PYS's (you should take out
ruins of screen memory), and in its place became
We take the microcircuit under study and throw it
first foot on the ground. Turn on the computer. If
will appear on the screenvertical stripes,
or vice versa, there are not enough points, then this micro-
the roc will not suit us - we’ll have to look again
roll If the computer works as before, then that's it.
ok and you can move on to the next one
stage.
I almost forgot, if you have a 48th computer, then
it should be converted into the 128th, and then
already in the 512th.
So, we have the mikruhi, let's move on.
Now we need to replace all PYS with ours
41256 - PYS is better to bite without regret -
leniya, and put sockets under the 256th. For-
Having changed the microcircuits, we temporarily throw them first
feet on the ground. The computer still needs
"plow" in 128 mode. Now according to appli-
Using the same scheme, we assemble all the modifications.
D6.1 D1.1 D1.4
┌─┐ ┌─┐ ┌─┐
A13┤ ├3──2┤ o1┬11┤ o13┐
A9┤ │ ┌3┤ │ └12┤ │ │
└─┘ │ └─┘ └─┘ │ ┌──┬───┬──┐
/WRFFFD─┘ └─2┤00│ │ │
C_TM9──3┤01│ │ │
D0──5┤10│ │ 0├4────┐
D6──6┤11│ │ 1├7───┐│
D1─11┤20│ │ 2├9──┐││
D7─10┤21│ │ 3├12 │││
14┤30│ │ │ │││
13┤31│ │ │ │││
#7FFD(D6,D7) +5V─── ├──┤ │ │ │││
#FDFD(D0,D1) GND─── ───1┤S │ │ │ │││
#DFFD ┌1SoOE│D7 │ │ │││
┴ └──┴───┴──┘ │││
┌───────────────────────────┘││
┌──────────────────────────────┘
/││┌───────────────────────────┘
GND──/ ─┐│││
││││ ┌───┐
/RES─|<|─┼────1oR Q├5 ┌───AB_КП11
│││└─2┤D │ │ ┌─┐
│├───3┤C _│ ├─5┤ o4───┐
+5V───────ЧoS Qoб───6┤ │ │
│││ └───┘ │ └─┘ │
│││ D2.1 │ D1.2 │
│││ ┌───┐ │ │
└───1ЗoR Q├9 │ │
│└─12┤D │ │ ┌─┐ │
└──11┤C _│ └─9┤ o10─┐│
+5V──────1OoS Qo8───8┤ │ ││
└───┘ └─┘ ││
D2.2 D1.3 ││
┌───────────────────────┘│
│┌───────────────────────┘
││ ┌──┬───┬──┐
GND────││───10┤20│ │ │
GND────││───11┤21│ │2 ├9───D38.1-D45.1
├────12┤22│ │ │
│├───13┤23│ │ │ ┌───┐
││ ├──┤ │ │ +5V──1ЗoR Q├9┐
D37.14─││───14┤ 1│ │ │ A6──12┤D │ │
D37.2──││────2┤ 2│ │ │ /RFSH──11oC _│ │
││ ├──┤ │ │ +5V──1OoS Qo8│
││ ┌15oEO│ │ │ └───┘ │
││ ├─1oE1│D3 │ │ D5.2 │
││ ┴ └──┴───┴──┘ ┌─────────────┘
││┌─────────────────│─────────────┐
│││ ┌──┬───┬──┐ │ │
GND────││────6┤10│ │ │ │ │
││└───5┤11│ │1 ├7─│─D53.9-D60.9 │
│└────4┤12│ │ │ │ ┌────────┤
└─────3┤13│ │ │ │ │ ┌───┐ │
├──┤ │ │ │+5V───1oR Q├5│
D50.1───────14┤ 1│ │ │ │ └─2┤D │ │
/RFSH────────2┤ 2│ ││ └──────ЗoC _│ │
├──┤ │ │ +5V───ЧoS Qob┘
┌15oEO│ │ │ └───┘
├─1oE1│D4 │ │ D5.1
┴ └──┴───┴──┘
D1 - LE1
D2, D5 - TM2
D3, D4 - KP12
D6 - LI1
D7 - KP11
I won’t explain what, how and why -
a "teapot" will not undertake such modifications,
and everyone else already understood everything.
Signals AB_KP11 and C_TM9 are taken from the board
extensions, respectively, from the 1st leg
KP11 and 9th TM9. The /WRFFFD signal is taken
also from the expansion board, it is formed
on ID7 and equals 0 when A14=1, A15=1, A1=0,
/WR=0, /IORQ=0, /M1=1. In addition to all the above-
hand-drawn, must be swapped
signals going to D34.4 and D37.13, D34.6 and
D37.11. Signal from D50.9 cut off and feed
for 1st legs D54-D60.
A correctly assembled circuit does not require
practically no configuration, therefore,
if something doesn’t work, then look for “sop-
"li", breaks and errors in installation. Well, what if
everything worked, then the memory can be tested
Ram Doctor program by Sergei Tyatin (in re-
Pentagon press).
In conclusion, I would like to note that it is not me
the first, and I hope not the last, who
tried to expand the memory of the "Lvov Vari-
anta". It would be nice if I could respond -
There were authors of other expansion options -
maybe their approach will be on to something
better than mine. All valuable solutions if desired
researches of their authors willpublished in
"Optocoupler"! In addition, there is still a lot of everything
possible modifications to the “Lvov version”,
which have not reached a wide circle of syncles
ristov. Aw! Zhelezyachniki! Share with us
come from the fruits of your labors!
If you suddenly have questions and/or tests,
lems with the extension, then you can call
I will help you in any way I can. Telephone in Lviv
ve: (0322) 67-60-45.
That's all I have for today. See you in January
cook!
Best regards,
Hacker Rasp,
Klimus Vladimir
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