Connection diagram to Profyak Meter Sim... ;))

I am finally presenting to you the connection diagram for a 1MB SIMM module, so long awaited by all Profyakov owners.

The MAi address and RAS, CAS, WE control buses are combined, and the data DI and DO make up two eight-bit buses. The MAi signals can be swapped with each other.

A SIMM is a set of similar chips in which the DI and DO signals are connected together. The MAi address and control buses RAS, CAS, WE are connected to signals of the same name on the SIMM. The Di SIMM signals must be divided into DIi and DOi.

To do this, you need to assemble the following circuit.

╔═════════════════════════╗
1533AP5 ║ SIMM1024K ║
┌───────────┐ ║ ┌──────┐ ║
Di0──────┤ DA0 DB0 ├──Ґ──┤D0 MA0├── MA0 ╟─── DO0
. ──────┤ DA1 DB1 ├──Ґ──┤D1 MA1├── MA1 ╟─── .
. ──────┤ DA2 DB2 ├──Ґ──┤D2 MA2├── MA2 ╟─── .
. ──────┤ DA3 DB3 ├──Ґ──┤D3 MA3├── MA3 ╟─── .
. ──────┤ DA4 DB4 ├──Ґ──┤D4 MA4├── MA4 ╟─── .
. ──────┤ DA5 DB5 ├──Ґ──┤D5 MA5├── MA5 ╟─── .
. ──────┤ DA6 DB6 ├──Ґ──┤D6 MA6├── MA6 ╟─── .
Di7──────┤ DA7 DB7 ├──╨──┤D7 MA7├── MA7 ╙─── DO7
GND/VCC<─┤ DIR │ │ MA8├── MA8
┌──┤ CS │ │ ├── MA9
│ └───────────┘ │RAS├─────────────────── RAS
WE ────┴────────────────────WE CAS├─────────────────── CAS
└──────┘

The DIR signal on the AP6 determines the direction transmission from buses
DA to buses DB. To connect a 1Mb SIM you will need to generate a signal MA9, and for 4Mb and MA10. The CAS signal must be supplied from U46 6н [LI1].

The WE signal is best supplied to the circuit through the following
node:

U31 LI1
┌──┐ ┌───┐ ┌──┐
│ &│8┌──┤ └──┤ &│ WE
│ O─┘ ┌┴┐ │ ├────
│ │ R1│ │ ┌──┤ │
└──┘ └┬┘ │ └──┘
└───┤
═╪═C1 R1 = 430 Om
─┴─ C1 = 200 Pf

Scheme reworking memory regeneration and formation
Megabyte address for Profi.

┌──┐
┴ │ U52
│ 10┌──┬──┬──┐9 MA8
DA21 ───┐X└───┤B1│MX│YB├──────
│ 11├──┤ │ │
DA9 ─────────┤B2│ │ │
│ 12├──┤ │ │
ADR12──┐│X┌───┤ B3 │
││ │ 13├──┤ │ │
ADR5 ─────┼───┤B4│ │ │
││ │ └──┴──┴──┘
┌────┘
│ ││ ┌───┐
│ ││ │ ┴ U53
│ ││ │ 10┌──┬──┬──┐9 MA9
│ ││ └───┤B1│MX│YB├──────
│ ││ 11├──┤│ │
D1 │ │└─────┤B2│ │ │
────┘ │ 12├──┤ │ │
┌───────┤B3│ │ │
D2 ││ 13├──┤ │ │
─────┘└──────┤B4│ │ │
└──┴──┴──┘

D1 - 6 pin U60 [LI3](512 bits)

D2 - 8 leg U60 [LI3](1MB bit)

It is also necessary to connect U60 12n [LI3] with U36 13n [LP5]
previously cutting off U60 12n from U45 11n [LI1], and then
connect U45 11n with U53 4n [KP12].

If something is not clear, write soap ;)

Long life and prosperity to you, All!

With best wishes, Musa Khaybullin.