[Techtoolslist] More updates to ftp - FLUKE

[Andre Huijts]

Found a ready made "Commodore 128" sub 9 to DIN 8 pins cable for about the cost of the loose parts so went ahead and ordered it. Hope to have it next weekend.

Now, I found a user manual for an "Ancona" monitor, and also for the Atari SC1425 monitor and these are all more ore less the same as the Philips and the Commodore 1084. (They are all Philips products).
You can even see it when you compare the manuals, they are virtually identical.

The important thing it says is that when hooking up both RGB through SCART and TTL at the same time, the TTL will be displayed. Once you turn off the TTL source or remove the cable it will automatically switch to the SCART RGB.

Now, that is not practical for this set-up of course, I want to be able to switch manually. I've been checking the schematics and I can't really figure out on what signal the monitor "decides" to display the TTL, but my guess is on the sync signal. (They combine H and V sync right away with just two resistors, nothing fancy). The combined sync goes up to a cap, so I'll desolder one side of that cab and see if I can switch manually between the two sources this way.

Since I don't fancy adding an extra switch, and since the monitor has a switch to toggle between RGB color and "Green only" I'm planning on using that switch. I will hardwire the set-up to always display RGB (never understood that feature anyway, I guess they tried to mimic a true monochrome green/amber screen, but it of course fails to get the benefits of that on a color CRT) and then use that switch to be able to switch between SCART and TTL.

First need the cable of course.

I checked the monitor and cleaned it. Looks great. Hooked up my DVD player and I noticed two things:

1) Man have we got used to not seeing 50Hz (25 really) flicker anymore...... ;)
2) Man those colors are so much more natural than any LCD/LED can produce..... :D

So, more later...




Op 17 nov. 2012, om 01:33 heeft Andre Huijts <a.huijts at upcmail.nl> het volgende geschreven:


> Yup. I just dug out my Philips monitor, it is a CM8524, which is identical to the Commodore 1084s.

> The bad news is it does not have a TTL RGB Sub 9 connector but the good news is that it DOES have a DIN 8 pin TTL RGB input ! :)

> 

> I know this was used for Commodore C128 computers that had a standard IBM CGA SUB 9 d output ! :) SOooooooo, I just need to find the correct cable and I'm good to go :)

> 

> Looks like I already found it: http://www.vesalia.de/?V02b0f1253544713705f5b56520a514e01101f0954414752050140090a1e31115579633a223c6373744e03263f2a2a73661560131e7c752337697f78236a7a3c6b0e7c6a77090b72560c776603775c5e555039685b5d7a5b4d046c1a785c5b1b4f2e607d29072533221

> 

> (It's the Commodore 128 RGBI Monitor Cable)

> 

> I could still do the SCART version but the big benefit of using the TTL input is that I will have the SCART input free for hooking up game-boards. There doesn't seem to be a switch to select which RGB input to use though (there is one for switching between CVBS and RGB). O well, that is of later concern....

> 

> 

> 

> Op 17 nov. 2012, om 00:36 heeft Martin White <martin at guddler.co.uk> het volgende geschreven:

> 

>> Correct, the +5v is an input, not an output. Remember it wasn’t an off the shelf B/W monitor, it was specifically Fluke’s B/W monitor for the programming option purchase.

>> 

>> 

>> 

>> And yes, the lack of 5v is a pain if you want to make up any kind of active sync circuit. Mine’s just connected to a 14” Hantarex Polo. I guess the monitor just accepts whatever the 9100 is outputting.

>> 

>> 

>> 

>> If it’s inverted sync then I know the MTC9000 will as it has a physical switch to change between positive and negative so either the Polo has the same or it does it automatically?

>> 

>> 

>> 

>> Martin.

>> 

>> 

>> 

>> From: Andre Huijts

>> Sent: ‎16‎ ‎November‎ ‎2012 ‎23‎:‎03

>> To: Technical Tools Mail List

>> Subject: Re: [Techtoolslist] More updates to ftp - FLUKE

>> 

>> 

>> It does make sense, doesn't it....it would be extremely weird to put +5V on that pin.....

>> 

>> Actually....looking at the schematics again it looks like the monochrome monitor is actually FEEDING BACK the +5V judging by the "arrow" going "into" the connector...

>> 

>> However, I have a problem now.....I need +5V for the 74LS04....and I don't want to make this a messy job....so I think I'll switch to this:

>> http://www.mikesarcade.com/wiretap/info/SyncInv.pdf

>> 

>> Guess I'll have to order a 74C04....

>> 

>> 

>> 

>> Op 16 nov. 2012, om 23:38 heeft David Shoemaker <davids at oz.net> het volgende geschreven:

>> 

>>> I have used a normal cga monitor on mine before.  I don't remember doing anything special to use it.

>>> _______________________________________________

>>> Techtoolslist mailing list

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>>> Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

>> 

>> André Huijts

>> andre.huijts at upcmail.nl

>> 

>> 

>> 

>> 

>> 

>> _______________________________________________

>> Techtoolslist mailing list

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>> _______________________________________________

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> 

> André Huijts

> andre.huijts at upcmail.nl

> 

> 

> 

> 

> 

> _______________________________________________

> Techtoolslist mailing list

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André Huijts
andre.huijts at upcmail.nl