Help fixing Vector-06c

[KTSerg]

I have blank 27256 and 27512, I can use either.

There are a lot of options for improvement.

ROM pin mapping.
https://s8.hostingkartinok.com/uploa...b5d7c3d99c.png

I suggest installing a 28-pin socket on the board to install the ROM.
Pins: 1, 2, 20, 21, 23, 24, 27, 28 - bend the leads, do not solder them into the board, isolate them from the board contacts.
Connect pins 26 and 28 (A13 always "1").
Connect old pin 21 - new pin 20.
Connect new pin 21 and D1 pin 17 (A10).
Connect new pin 24 and D1 pin 18 (A9).
Connect pins 23, 2, 27 to jumpers to select a program (for 8 program of 2K).

Рrograms will need to be written to the ROM from the addresses:
A14="0":
2000h
2800h
3000h
3800h
A14="1":
6000h
6800h
7000h
7800h

It is not necessary to connect free address pins (23, 2, 27) with jumpers, you can connect them to the power supply or the case, and write only one program to the ROM.

The corner at the first contact of the socket will need to be cut, since chip D1 will interfere.

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