PC-01 Lviv

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 Post subject: ПК-02 Мукачево
PostPosted: 07 Nov 2019, 13:08 
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Нашлись упоминания о реально существовавшем экземпляре. Пока, как-то так:
Quote:
[...] спрошу у отца. Теоретически, мог остаться и сам ПК. По факту - во время ремонта все могли выбросить.
Ждем и надеемся!


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PostPosted: 08 May 2020, 13:19 
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Увы, я мало что помню, кроме очень плохо работающей клавиатуры. Спрошу еще у отца.
Документации не сохранилось, я смотрел, равно как и самого ПК.
Quote:
Не впечатлил он меня после УМПКР, хотя "выступающие" клавиши - это было очень круто. Но нажимались они очень посредственно и подклинивали.
Quote:
там еще бейсик был вроде "вшит", т.е. не надо было его каждый раз загружать. Вот это было весомое преимущество аппарата. ))
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но его корпус был намного компактнее, чем у ПК-01! Правильной прямоугольной формы, как классическая клавиатура. И черного цвета со светлыми клавишами.


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PostPosted: 20 Jul 2023, 17:19 
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OMG!!!


https://www.youtube.com/watch?v=gNTYLk-yja8

https://www.youtube.com/watch?v=vhNpYsXgur4


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PostPosted: 23 Jul 2023, 06:17 
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Location: Россия
Quote:
8)


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PostPosted: 07 Aug 2023, 11:42 
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Hey! That's me ;)

Got her out again tonight and will try some more troubleshooting ... if you have any ideas (схема??) then I would greatly appreciate it.

Thanks
Brett.


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PostPosted: 07 Aug 2023, 11:50 
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OMG!!!
BTW, was it a good "OMG" or a bad "OMG" ... ?

Good OMG == OMG, someone in Australia is interested in the PC-02 ... or
Bad OMG == OMG, this Australian is butchering the poor PC-02

:wink:

Brett.


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PostPosted: 08 Aug 2023, 01:31 
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I wonder if the one I have has had some parts stripped.

There's a distinct lack of decoupling caps (although I know they were judicious in their use in Soviet era), and I see a lot of "bare legs" where a component was but has been snipped off.
Attachment:
File comment: Right-hand board
ПК02 board2 50per.jpg
ПК02 board2 50per.jpg [ 630.99 KiB | Viewed 33163 times ]
And near the video output there appears to be missing transistors ... sets of three bare legs.
Attachment:
File comment: video output
ПК02 video output 50per.jpg
ПК02 video output 50per.jpg [ 354.79 KiB | Viewed 33163 times ]
/Brett


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PostPosted: 08 Aug 2023, 14:10 
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BTW, was it a good "OMG" or a bad "OMG" ... ?

Good OMG == OMG, someone in Australia is interested in the PC-02 ... or
Bad OMG == OMG, this Australian is butchering the poor PC-02
It's double good OMG.
1: someone in Australia is interested in the PC-02
2: PC-02 was some kind of "mystery" PC. There was some information about it, but no real hardware.

So, I'm so sorry, but I couldn't help you with documentation and/or schemes.

The only one important note to avoid mess.

There are two different meaning for "PC-02"

1. Original PC-02 Mukachevo was developed at the end of USSR period. And only small testing batch was released at factory in Mukachevo.

2. PC-02 Lviv is the amateur upgrade for PC-01 Lviv. Processor replacement to Z80, extended memory (128/256/512), AY sound chip.


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PostPosted: 09 Aug 2023, 15:06 
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It's double good OMG.
1: someone in Australia is interested in the PC-02
2: PC-02 was some kind of "mystery" PC. There was some information about it, but no real hardware.

So, I'm so sorry, but I couldn't help you with documentation and/or schemes.
Ahhhh! All good. I've had discussions on Telegram group too ... UCHC "Ukrainian Computing History Community" ... they had boot screen on a working one and it showed ... PC-02 "KIEV" ... and running BASIC 2.1.
Attachment:
File comment: BASIC 2.1
2023-08-09 09.52.52.jpg
2023-08-09 09.52.52.jpg [ 186.8 KiB | Viewed 33133 times ]
Attachment:
File comment: PC-02 "KIEV"
2023-08-09 09.52.45.jpg
2023-08-09 09.52.45.jpg [ 182.18 KiB | Viewed 33133 times ]
They also had pictures of my missing components. It looks like mostly it is the decoupling caps (assuming 100nF) that are missing - so I have started replacing those.

There are also some missing components near the video output ... but luckily they should only be for the cassette interface, so I can ignore for now (УД6Б and АОТ110).

Once I've put the decoupling caps back, I will try to boot again and see if I have more success! I'll let you know!

/Brett


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