Author Topic: X68000 and the Microvitec M1438  (Read 1959 times)

Offline RetroRepair

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X68000 and the Microvitec M1438
« on: March 19, 2014, 09:04:24 pm »
Hey guys,

I was wondering if anyone knew if the X68000 would plug straight into this monitor? The cable looks like it'll fit but I have heared the pinout is non standard on these machines, plus the pinout for the Microvitec isn't available online.

Any help would be appreciated!

Offline caius

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Re: X68000 and the Microvitec M1438
« Reply #1 on: March 20, 2014, 02:45:44 am »
Hi, Microvitec M1438 is the perfect choice for any X68000.I have a M1438S and it works perfect with whatever risolution X68000 ouputs.
Building the cable is very easy, you have to follow the two  pinouts and match the corresponding signals.In particular, this is the M1438 A/V connector pinout:

http://ataricomputers.altervista.org/Monitors_Amiga_M1438S.html

Pay only attention that some models of M1438 have DB15 VGA connector instead of DB23 Amiga one.




Offline RetroRepair

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Re: X68000 and the Microvitec M1438
« Reply #2 on: March 20, 2014, 02:53:11 am »
Yeah I believe the one arriving today has the DB15 connector (not Amiga branded).

Do you know the pinout for that one or if it will just plug straight in?

Offline RetroRepair

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Re: X68000 and the Microvitec M1438
« Reply #3 on: March 20, 2014, 03:55:06 am »
Ok well turns out it's a HD15, not DB15 so I guess some wiring is in my future. At least it's not some oddball connector I can't get the pinout for!

Cheers caius

Offline caius

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Re: X68000 and the Microvitec M1438
« Reply #4 on: March 21, 2014, 01:09:09 am »
Ok well turns out it's a HD15, not DB15 so I guess some wiring is in my future. At least it's not some oddball connector I can't get the pinout for!

Cheers caius

As far As I know, Microvitec M1438 is a re-badged version of the Commodore 1962 monitor.DB15 connector of your Microvitec M1438 is a standard VGA so you should follow this pinout.

Offline RetroRepair

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Re: X68000 and the Microvitec M1438
« Reply #5 on: March 21, 2014, 01:13:34 am »
Yes I was just pointing out that VGA is hd15 and NOT db15. Nice little monitor though, very retro :)

Offline R3dRuM

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Re: X68000 and the Microvitec M1438
« Reply #6 on: May 22, 2017, 01:32:18 am »
Hi, Microvitec M1438 is the perfect choice for any X68000.I have a M1438S and it works perfect with whatever risolution X68000 ouputs.
Building the cable is very easy, you have to follow the two  pinouts and match the corresponding signals.In particular, this is the M1438 A/V connector pinout:

http://ataricomputers.altervista.org/Monitors_Amiga_M1438S.html

Hi,

I've got an Amiga M1438S monitor (Microvitec) and just found this thread :). As caius has mentioned in the quoted message,  my monitor has the 23 pins RGB connector, as you can see in the following image:



The thing is that I'm currently using a VGA cable for my x68k (I don't have the original one) which I use to connect the Sharp with a TFT NEC monitor that supports 15Khz, 24Khz and 31Khz, and now I want to replace this TFT with the Amiga M1438S monitor. The question is, what kind of cable or adapter are you guys using to connect the x68k to the monitor? is there somewhere I can order one?

I've thought also to buy an adapter like the two listed below (in order to be able to connect my x68k VGA cable to the Amiga monitor):
- http://www.ebay.com/itm/361509837130
- http://amigakit.leamancomputing.com/...roducts_id=577

What do you think?

Thank you!

Offline caius

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Re: X68000 and the Microvitec M1438
« Reply #7 on: May 22, 2017, 06:00:51 am »
You should put aside the old VGA cable that you used to connect your X68K to the NEC monitor since the video input connector of the Microvitec M1438S has a different pinout.Neither try to use some pre-assembled adapters, thery could also produce damages if not correclty wired inside.
My advice is to assemble the cable yourself, I did it and it work great also for FM-TOWNS.It's very simple.
You have all the signals on both sides, the Microvitec accept also separate H-SYNC and V-SYNC which are the ones outputted by the X68K.

Here are the two pinouts (X68K and Microvited M1438S)

http://www.gamesx.com/wiki/doku.php?id=av:japanese_rgb-15

http://ataricomputers.altervista.org/Monitors_Amiga_M1438S.html

P.S.
Is the old VGA cable assembled by yourself?Which is the model of your older NEC monitor?

Offline R3dRuM

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Re: X68000 and the Microvitec M1438
« Reply #8 on: May 22, 2017, 06:17:30 am »
Is the old VGA cable assembled by yourself?Which is the model of your older NEC monitor?

The VGA adapter was assembled by a mate, I think that he followed this schema:

Code: [Select]
VGA CONNECTOR         FUNCTION           X68000 CONNECTOR
=============================================================

Pin 1 --------------------- RED ------------- Pin 1
Pin 2 --------------------- GREEN ----------- Pin 3
Pin 3 --------------------- BLUE ------------ Pin 5
Pines 5,6,7,8,10 ---------- GND ------------- Pines 2,4,6,8,12
Pin 13--------------------- HSYNC ----------- Pin 14
Pin 14--------------------- VSYNC ----------- Pin 15

And the NEC monitor is a TFT NEC MULTISYNC LV15M:



So, is it dangerous to try to connect the Microvitec/Amiga monitor with this RGB->VGA adapter for the M1438S (http://www.ebay.com/itm/361509837130) to the VGA adapter that I have in my x68k?

Thank you caius.
« Last Edit: June 12, 2017, 05:25:36 am by R3dRuM »

Offline caius

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Re: X68000 and the Microvitec M1438
« Reply #9 on: May 22, 2017, 06:25:28 am »
In theory it should work but you can't know how this adapter has been wired internally so there is the risk to fry something.I' m still for the homemade solution.

Offline R3dRuM

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Re: X68000 and the Microvitec M1438
« Reply #10 on: May 22, 2017, 06:48:30 am »
In theory it should work but you can't know how this adapter has been wired internally so there is the risk to fry something.I' m still for the homemade solution.

Yes, I agree... the thing is that I do not have the knowledge/materials needed to make the cable by myself.

PS. If you can make one for me, I would happily pay you what the ebay adapter costs so that you can drink a few beers on me :) (without obligation!!)

Thank you again.

Offline caius

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Re: X68000 and the Microvitec M1438
« Reply #11 on: May 22, 2017, 07:59:41 am »
I can't promise it since I'm currently busy in a lot of other jobs.Give me some days and I will back to you

Offline R3dRuM

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Re: X68000 and the Microvitec M1438
« Reply #12 on: June 07, 2017, 02:25:02 am »
Finally I've managed to get a direct x68000 --> m1438s rgb adapter. The x68000 looks awesome on this monitor :) :)

Thank you anyway caius!
« Last Edit: June 07, 2017, 02:28:34 am by R3dRuM »

Offline caius

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Re: X68000 and the Microvitec M1438
« Reply #13 on: June 12, 2017, 03:29:21 am »
Finally I've managed to get a direct x68000 --> m1438s rgb adapter. The x68000 looks awesome on this monitor :) :)

Thank you anyway caius!

Forgive me if I didn't contact you but I'm still terribly busy with job and real life.Anyway I'm glad you solved your problem.Did you assemble the cable yourself?

Offline R3dRuM

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Re: X68000 and the Microvitec M1438
« Reply #14 on: June 12, 2017, 05:22:52 am »
Forgive me if I didn't contact you but I'm still terribly busy with job and real life.Anyway I'm glad you solved your problem.Did you assemble the cable yourself?

Don't worry at all caius, I understand it. I sent an email with the two pinouts to an online shop from here (Spain) that assembles all kinds of cables and adapters for vintage computers/consoles, so they made the cable for me and it works like a charm... finally I can fully enjoy my x68k :D