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General Category => Amstrad CPC hardware => Topic started by: Devilmarkus on 12:30, 05 May 10

Title: How to connect a CPC+ to the CTM 644?
Post by: Devilmarkus on 12:30, 05 May 10
Who can explain me in a simple way how I can connect a CPC 6128+ to my CTM-644 monitor?
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Bryce on 13:48, 05 May 10
Haven't tried it, but I would suggest...

Plus Pin          to          CTM pin
4                                  1
5                                  2
2                                  3
8                                  5
1                                  4
3                                  6

If you want sound you'll have to connect a speaker between Pins 8 and 6 for the left channel and 8 and 7 for the right channel.

Bryce.
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Devilmarkus on 14:10, 05 May 10
Thank you Bryce,
Could you also post a plan for that?
I don't have the + pins. Only the pins for the CTM...

Edit: got them:
Amstrad CPC Monitor port pinout 
 (http://cpcwiki.eu/imgs/thumb/e/ee/Cpc_monitor_pinout.jpg/300px-Cpc_monitor_pinout.jpg) (http://cpcwiki.eu/index.php/File:Cpc_monitor_pinout.jpg) 
Pin No. Signal Name Description
1 R Red analogue signal
2 G Green analogue signal
3 B Blue analogue signal
4 Sync RGB switching control
5 GND Common
6 LUM Luminance
  This covers the CPC's RGB signal through the 6 pin DIN socket.   Amstrad PLUS Monitor port pinout 
 (http://cpcwiki.eu/imgs/thumb/a/a1/Plus_monitor_pinout.jpg/300px-Plus_monitor_pinout.jpg) (http://cpcwiki.eu/index.php/File:Plus_monitor_pinout.jpg)
 
Pin No. Signal Name Description
1 Sync RGB switching control
2 G Green analogue signal
3 LUM Luminance
4 R Red analogue signal
5 B Blue analogue signal
6 L Left audio signal
7 R Right audio signal
8 GND Common



Ok, time to solder a bit and find the parts I need
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Devilmarkus on 17:53, 05 May 10
Thank you, Bryce!
Got it working well!
Look photos here:
http://cpcwiki.eu/forum/index.php/topic,638.msg8520.html#msg8520
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: xesrjb on 21:43, 05 May 10
The better way is to conect a monitor from a CPC6128+ with an CPC 6128 as I did!!


xesrjb ;)
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Devilmarkus on 21:56, 05 May 10
The better way is to conect a monitor from a CPC6128+ with an CPC 6128 as I did!!

Yes when you have a + monitor, no problem then.

But I don't have.
Title: 8-pin DIN plug for CPC+ to SCART cable?
Post by: OCT on 13:16, 12 March 11
Amstrad PLUS Monitor port pinout 
(http://cpcwiki.eu/imgs/thumb/a/a1/Plus_monitor_pinout.jpg/300px-Plus_monitor_pinout.jpg) (http://cpcwiki.eu/index.php/File:Plus_monitor_pinout.jpg)
 
Pin No. Signal Name Description
1 Sync RGB switching control
2 G Green analogue signal
3 LUM Luminance
4 R Red analogue signal
5 B Blue analogue signal
6 L Left audio signal
7 R Right audio signal
8 GND Common

With a Plus (hopefully) finally on its way to me (late in the game ;)) it's time to get a SCART cable made.
(http://www.cpcwiki.eu/imgs/5/50/Plus2SCART_-_RGB.jpg)
http://www.cpcwiki.eu/imgs/5/50/Plus2SCART_-_RGB.jpg/50/Plus2SCART_-_RGB.jpg (http://www.cpcwiki.eu/imgs/5/50/Plus2SCART_-_RGB.jpg)...
probably refers to swapped Pins 6 and 8 on the viewed-from-rear (solder side) 8-pin DIN plug if the above image and http://cpcwiki.eu/index.php/Connector:Monitor#Amstrad_PLUS_Monitor_port_pinout are accurate.

Now I see a difference in how these plugs are shown:
The connector used on the Plus seems to have a center pin, while the one according to the DIN standard is depicted with an off-center middle pin closer to the notch:
(http://upload.wikimedia.org/wikipedia/commons/4/42/Din-Steckertypen.png)
http://upload.wikimedia.org/wikipedia/commons/4/42/Din-Steckertypen.png (http://upload.wikimedia.org/wikipedia/commons/4/42/Din-Steckertypen.png)

So, is any of these the correct plug?

http://www.reichelt.de/Diodenstecker-Mini-Din/MAS-80S/index.html?;ACTION=3;LA=444;GROUP=C165;GROUPID=3240;ARTICLE=11202;START=0;SORT=artnr;OFFSET=16

http://www.reichelt.de/Diodenstecker-Mini-Din/MAS-80SN/index.html?;ACTION=3;LA=444;GROUP=C165;GROUPID=3240;ARTICLE=11203;START=0;SORT=artnr;OFFSET=16

http://www.reichelt.de/Diodenstecker-Mini-Din/DIO-80SN-SMS/index.html?;ACTION=3;LA=444;GROUP=C165;GROUPID=3240;ARTICLE=46267;START=0;SORT=artnr;OFFSET=16

From whatever little is visible in the Bürklin catalogue's small-print, I'd venture a guess the Plus plug is part number 70 F 612 (not shown on-line) according to DIN 45326 S8 (pin 8 at axial center with pins 4 through 7 at 90° angles to each other, i.e. 45° between adjacent pins (?).

Other sources, also for particularly sturdy plugs ready-made (molded) with an cable, are of course very welcome as well - as is any indication of an RGB(+stereo)-to-DVI/HDMI converter that someone has to have started making these days.
Title: 8-pin DIN plug for CPC+ to SCART cable?
Post by: Bryce on 15:55, 12 March 11
The correct part you need is called MAS 80SN in the Reichelt catalogue. But I wouldn't recommend the SCART cable you've included here, because it's way too complicated and needs batteries. Use this version http://www.cpcwiki.eu/index.php/TV_SCART_cable#Alternative_RGB_Wiring (http://www.cpcwiki.eu/index.php/TV_SCART_cable#Alternative_RGB_Wiring) (obviously with the Plus connector and pinout) and you'll get a better picture without needing batteries, and add the Capacitor if you're connecting to an LCD or Plasma TV.

Bryce.
Title: Re: 8-pin DIN plug for CPC+ to SCART cable?
Post by: OCT on 16:21, 12 March 11
The correct part you need is called MAS 80SN in the Reichelt catalogue.
Thanks for the swift reply, :) I'll try and get one of these (not with an axially centered middle pin then?) and make a cable much like for the "old-gen" CPCs.
I do have a CPCAI modulator (not that they were ever easy to calibrate, without a scope at least, using the dreaded MC1377 without delay line) which I'll also retrofit with an 8-pin plug to try and use for the time being.
Getting the CPC on HDMI (even more so as it goes wireless these days) would of course make cabling much easier in this... future - hopefully someone will build circuitry at Chinese pricing soon.
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Bryce on 17:21, 12 March 11
The centre pin on the plus isn't exactly in the centre, it's slightly lower than centre, but it's definitely not as low as the one in the diagram you posted, maybe the diagram is just badly drawn? Either way, I have the MAS 80SN here, which I ordered from  Reichelt and it's definitely the right one.

Converting the CPCs RGB to HDMI would be a nightmare, until they come up with a fancy all-in-one RGB to HDMI IC (highly unlikely), if you can get your hands on an AD724, the converter that charlie presented gives a way better picture than the old MC1377. I've built one too and it's really good.

Bryce.
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: OCT on 00:20, 18 March 11
Thanks again! BTW, as I couldn't seem to find it on the Wiki, other than for the GX4000 at http://www.cpcwiki.eu/index.php/Plus#Included_in_Delivery:
What precisely is the power specification (voltage range, max. Ampères, plug pinout - same as on former models?) for a CPC6128 plus?
As per http://www.cpcwiki.eu/index.php/Amstrad_CM14_Colour_Monitor doesn't require dual voltage due to the disk drive like the old CPC 664/6128s did, or does it - and will it require the full 2.4 A that the monitor may have provided?
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Bryce on 00:30, 18 March 11
No, quite a bit more. Because the drive and all the logic runs off the 5V supply, the plus pulls about 3.2 Amps, the original has 12V for the drive, so the 5V was speced at only 1.5Amps. If you have any amount of expansions attached, you could be peaking around 4.5Amps, so I'd recommend something around 5Amps to be safe.

The voltage range isn't great, anything under 4.7V is going to cause instability problems, anything above 5.5V will damage some of the ICs.

The polarity for the 5V is the same as the classic CPC, Plus in the centre, Ground on the outer ring.
The classic 12V plug is reversed, with plus outside.

The output of the CM14 is the constant current spec, it probably could supply around 3Amps permanently (with a little heating) and peak up to 4Amps.

Bryce.
Title: Re: 8-pin DIN plug for CPC+ to SCART cable?
Post by: OCT on 23:02, 14 April 11
The correct part you need is called MAS 80SN in the Reichelt catalogue.
For the record (or Wiki, that is), I attach a very detailed close-up photo of the CPC+ video socket (http://cpcwiki.eu/forum/index.php?action=dlattach;topic=726.0;attach=1530;image) (one apparently "mistreated" by a former owner trying to insert another type of plug).

MAS 80SN (with the middle pin somewhat off-center; unlike other non-circular, U-shaped or "horseshoe" DIN 8 connectors where three of the pins line up) is a Belden (f/k/a Hirschmann) connector according to http://www.e-catalog.beldensolutions.com/link/57078-24228-24383-24384-24385-24387-34796/en/conf/1-0 (http://www.e-catalog.beldensolutions.com/link/57078-24228-24383-24384-24385-24387-34796/en/conf/1-0):
(http://www.e-catalog.beldensolutions.com/download/managed/pim/6f182f19-ff22-418c-9ebb-80de901a0312/z931518500_us.jpg;jsessionid=?type=attachment)
All across Europe, e.g. Conrad.com (http://www.conrad.com) should have these as item#737267 at  €2.
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Bryce on 00:22, 18 April 11
Or 35 cents from Reichelt :D

Bryce.
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: OCT on 02:26, 19 April 11
Or 35 cents from Reichelt :D
Sure (guess I pointed to them myself earlier on), but without sales outlets all over the place.
That's not to say that Reichelt shouldn't introduce an "Amazon Prime" kind of annual flat-fee shipping though... ;)
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: OCT on 02:32, 19 April 11
At any rate, MAS 80SN is the right plug - for anyone needing this in the future of this quarter-century past, ;) here's the overlay to show how the connectors match:
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Bryce on 10:55, 19 April 11
How long do I have to stare at that picture before I start halucinating? :D

Bryce.
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: VincentGR on 16:01, 26 December 18
Haven't tried it, but I would suggest...

Plus Pin          to          CTM pin
4                                  1
5                                  2
2                                  3
8                                  5
1                                  4
3                                  6

If you want sound you'll have to connect a speaker between Pins 8 and 6 for the left channel and 8 and 7 for the right channel.

Bryce.




Necromancer mode enabled:


Why not 2 to 2?
Title: Re: How to connect a CPC+ to the CTM 644?
Post by: Bryce on 20:18, 26 December 18
No idea, a long time ago, but most likely just a mistake.

Bryce.