Welcome, Guest. Please login or register.


Recent Posts

Pages: 1 2 3 4 5 [6] 7 8 9 10
51
Interface / Re: Internal memory expansion
« Last post by Wolfgang on 2020.September.15. 21:38:12 »
That's a neat little replacement for the 7805! :)

Why did you make the change? Were you having problems with your EP64?

It is more of a habit. I usually replace every 7805 in old computers either with the OKI-78SR or the TSR 1-2450 in order to reduce the heat. I generally prefer the TSR 1-2450, but they don't fit in the EP without removing the cooler and that would leave an ugly hole.
52
Hardware / Noise on RGB signal. Suggestions?
« Last post by John Fante on 2020.September.15. 21:18:39 »
I managed to recap my "new" Egyptian EP and update to EXOS 2.4 :)

The machine works but I still have a strange noise problem on the RGB signal. See here.

Any suggestions how to find the source for that?

As far as I can see the components are fine but maybe something "broke" when I turned it on the fist time?

At first boot the machine was dead. Red LED on but no picture. With the help from this thread i managed to get it going.

The 5V rail was fine but 12V was way too low which cause the TR2 to fry (maybe killed by a bad C9). I replaced TR2 and C9 and the machine came to life :) But now I have a noise problem (see video).

To cure that I then recapped the board (took a while :) ). That is finished now but the noise is still there.

Any suggestions to where I should start looking for the error?
53
Interface / Re: Internal memory expansion
« Last post by elmer on 2020.September.15. 21:01:03 »
I also replaced the 7805s with OKI-78SR; quite the difference now......

That's a neat little replacement for the 7805! :)

Why did you make the change? Were you having problems with your EP64?
54
Hardware / RF signal only black&white
« Last post by Wolfgang on 2020.September.15. 16:43:43 »
While I get a good quality color picture on scart, I am unable to see color with my rf modulator. I already replaced LM1886, LM1889, TR6, C38,C39,C36 without any success. What else could be wrong?
55
Weboldalak / Re: EP128.hu
« Last post by szipucsu on 2020.September.15. 11:41:03 »
Lehetne Zzzip programcsokor is külön. Kicsit fura a basic programcsokron belül a zzzippelt programok, meg a normál játékok között is akad belőlük elszórva. Maga a basic programcsokor is jól meghízott, lehetne talán más elrendezéssel is, néhány ismertető jó hosszú a sok rövid ismertető között.
56
Weboldalak / Re: EP128.hu
« Last post by Tutus on 2020.September.15. 11:22:07 »
Lehetne pl. egy külön IS-DOS programcsokor, de oda mehetne minden más is, ami IS-DOS alatt fut, nem csak a játékok.
Az Enterprise World oldalon ez már megoldva :)
https://enterprise-world.net
Rögtön hozzáteszem, amit eddig is mondtam: NEM Lacika vetélytársa akarunk lenni az oldallal...
Úgy érzem, hogy a nagyon fontos programok felkerültek / felkerülnek hozzánk.
Játékok nem (kivétel ez alól az IS-DOS játékok).
Még rengeteg munkánk van az oldallal :)
57
Interface / Re: Internal memory expansion
« Last post by Wolfgang on 2020.September.14. 18:25:43 »
I removed the header. Now I can close it properly. :)
I also replaced the 7805s with OKI-78SR; quite the difference now......
58
Interface / Re: Creating EXDOS card clone
« Last post by pear on 2020.September.14. 17:03:01 »
I ordered 15 pieces. We'll see what comes out.
59
Interface / Re: Creating EXDOS card clone
« Last post by gflorez on 2020.September.14. 09:57:53 »
Great to read that Pear wants to buy more WD chips. That means for me that his fine EXDOS controllers continue in production.
60
Interface / Re: Creating EXDOS card clone
« Last post by pear on 2020.September.14. 09:24:10 »
Ok. Thanks for the info. It's time for shopping ;)
Pages: 1 2 3 4 5 [6] 7 8 9 10