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Author Topic: ZX Spectrum Emulator Card (Read 39405 times)

Offline Bagpuss22

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Re: ZX Spectrum Emulator Card
« Reply #15 on: 2012.July.20. 12:47:31 »
Zozo,

Do you have any high res pictures of the Sprectrum Emulator PCB without components?

Just wanted to see the scope of getting cards if I cannot get PLD/FPGA work done.

regards

Russ

Offline Zozosoft

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Re: ZX Spectrum Emulator Card
« Reply #16 on: 2012.July.20. 12:54:56 »
Do you have any high res pictures of the Sprectrum Emulator PCB without components?
No, I never removed all components from a card.

Offline Bagpuss22

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Re: ZX Spectrum Emulator Card
« Reply #17 on: 2012.July.20. 13:08:40 »
No, I never removed all components from a card.

OK thanks....

Offline Zozosoft

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Re: ZX Spectrum Emulator Card
« Reply #18 on: 2015.April.16. 10:20:32 »
« Last Edit: 2015.April.16. 13:12:31 by szipucsu »

Offline ssr86

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Re: ZX Spectrum Emulator Card
« Reply #19 on: 2015.April.16. 17:08:30 »
Attached pictures "stolen" from http://speccy.pl/forum/index.php/topic,1891.0.html (you have to be registered to see attachements... I hope the author doesn't mind...).  He wrote that for the price of the one on ebay he could make himself about five of these...

This man also works on/finished a "compact exdos interface": http://speccy.pl/forum/index.php/topic,1997.0.html.
(the forum is polish).

Offline Tuby128

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Re: ZX Spectrum Emulator Card
« Reply #20 on: 2015.April.16. 18:45:48 »
I don't understand the power supply of the system bus bridge. Which voltage comes in at the DC-connector of the system bus bridge? If I connect this, do I need the normal 9V supply of the EP? I mean, when the system bus bridge is shared with the mainboard, thus the EP has to be switched on as well. Am I right?

Offline Zozosoft

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Re: ZX Spectrum Emulator Card
« Reply #21 on: 2015.April.16. 18:53:56 »
9V come from Enterprise and the Bridge made a 5V for EXDOS or Spectrum emulator.
But the Bridge have a external power connector, if it is connected then use it instead the 9V from the machine.

Offline Tuby128

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Re: ZX Spectrum Emulator Card
« Reply #22 on: 2015.April.16. 19:11:03 »
And what happens, when I connect the bridge DC-connector without the EP supply? Doesn't go back the supply to the mainboard? If you say, no, I think that makes the Graetz-bridge.

Offline Zozosoft

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Re: ZX Spectrum Emulator Card
« Reply #23 on: 2015.April.16. 20:25:50 »
From the Bridge no go back to the motherboard. The powersocket mechanical switch the two power source.

The original bridge use 7805 regulator. I think this one using some switching power circuit for the 9V -> 5V conversion.

Offline pear

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Re: ZX Spectrum Emulator Card
« Reply #24 on: 2015.April.19. 18:15:53 »
Hi,
Well, "This man" is me :)
Simulator built using the documentation I found in you :)
I also made the bridge (fourth and fifth image from a post above).
I only have a problem with getting the appropriate edge connectors. Either they are too short or very expensive ($ 6 each).
Instead of the original system, in my bridge is a pulse stabilizer.
It can work without a huge heat sink :)

In addition to running the emulator I also EXDOS card. Completely rebuilt the original (there are only 6 ICs).
I am now working on their own version of the bridge. For now, uphill, but don't give up ;)
« Last Edit: 2015.April.19. 18:21:36 by pear »

Offline pear

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Re: ZX Spectrum Emulator Card
« Reply #25 on: 2015.April.19. 18:52:21 »
He wrote that for the price of the one on ebay he could make himself about five of these...
After taking the work out exactly 9 pieces for the price of that one. :)

Offline Zozosoft

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Re: ZX Spectrum Emulator Card
« Reply #26 on: 2015.April.19. 19:26:29 »
Great work all!

The Emulator can also work with own power converter? I see the space for it.

Offline pear

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Re: ZX Spectrum Emulator Card
« Reply #27 on: 2015.April.19. 20:15:45 »
Yes, it can. The PCB is designed variants. In the other variant emulator may be connected indirect, without bridge. You need to reconfigure the jumpers and add a few elements.
« Last Edit: 2015.April.19. 20:47:29 by pear »

Online gflorez

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Re: ZX Spectrum Emulator Card
« Reply #28 on: 2015.April.19. 20:49:17 »
Hello Pear, your cards are impressive...

I want to do you two questions:

Has your Spectrum emulator the fixes made by Zozo?

and,

How about doing a Microteam clone, EXDOS+RAM+ROM+possibility for a real time clock(thanks to Zozo), and more?

I say that because my Microteam has all that possibilities plus still a spare expansion bus(may be for a new Spectrum emulator...).
« Last Edit: 2015.April.19. 20:55:15 by gflorez »

Offline pear

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Re: ZX Spectrum Emulator Card
« Reply #29 on: 2015.April.19. 21:15:09 »
First:
Yes, it's fixed version.

Second:
I thought about it, but I have some other ideas. Ultimately, I want to replace the original edge connectors more reliable and cheaper connectors. My choice for now is IDC64.