Apple //c monitor horizontal sync

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Apple //c monitor horizontal sync
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I'm in the midst of putting together another of my Frankintoshes - this time wedging a G4 Mini into the body of an Apple //c. One of the finishing touches I'd like to add is video out to an original Apple monitor. The model I have is a 9'' green monochrome like this one:
http://upload.wikimedia.org/wikipedia/commons/4/48/Apple_IIc_with_monitor.jpg

Using schematics from this site - http://www.geocities.ws/podernixie/htpc/cables-en.html#vgavideo - I built an adapter which seems to work at 640x480@60Hz, with one glaring problem.

As you can see from this photo - http://www.flickr.com/photos/charles_mangin/6926854065 - i'm having issues with the horizontal sync. The picture seems to be clear, but shifted horizontally.
Does anyone here have a suggestion for how to adjust either the monitor or the adapter I've built to connect the Mini's output to monochrome RCA?

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Re: Apple //c monitor horizontal sync

the point is issued at the site, where there is stated: you have to set the right ( i.e. correct ) data for the display...
i.e. the problem is the fixed timing of the monitor... you have to get down the timing parameter to 15 kHz instead of the usual low-limit set to 30 kHz.... i.e. with normal VGA monitor connected to the G4 set output to "non-standard-apple-monitor" or something like Video-seven multi-sync-monitor and thereafter the choice of the video-mode must be set to 640 x 480 at 15 kHz. then reconnect to FBAS-Monitor and enjoy...

by the way... you realy got me amazed with that idea... gosh ! slaughtering a G4.... transplantation of the guts into a IIc coat.... thats really "Dr. Frankenfurter" at his best... Rocky Horror Picture Show in the tombs of Apple and all together mixed up ! WOW ! It would be neat to get soma pictures of the "operation session" at the IIc body.... what´s with the keyboard or the internal floppy ? What was placed instead ? and how ?

assuming from that - had there been some kind of "pre-transplantational-experiences" made like "power-mac in a IIe" or similar ?

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Re: Apple //c monitor horizontal sync

speedyG wrote:
the point is issued at the site, where there is stated: you have to set the right ( i.e. correct ) data for the display...
i.e. the problem is the fixed timing of the monitor... you have to get down the timing parameter to 15 kHz instead of the usual low-limit set to 30 kHz.... i.e. with normal VGA monitor connected to the G4 set output to "non-standard-apple-monitor" or something like Video-seven multi-sync-monitor and thereafter the choice of the video-mode must be set to 640 x 480 at 15 kHz. then reconnect to FBAS-Monitor and enjoy...

by the way... you realy got me amazed with that idea... gosh ! slaughtering a G4.... transplantation of the guts into a IIc coat.... thats really "Dr. Frankenfurter" at his best... Rocky Horror Picture Show in the tombs of Apple and all together mixed up ! WOW ! It would be neat to get soma pictures of the "operation session" at the IIc body.... what´s with the keyboard or the internal floppy ? What was placed instead ? and how ?

assuming from that - had there been some kind of "pre-transplantational-experiences" made like "power-mac in a IIe" or similar ?

speedyG,

He took the gut from a G4 Mac Mini and put that inside the IIc case, so there is more than enough room to spare. Here's a link to a site with a article, and pic, about a Mac Mini being put inside a Disk II case: http://www.apl2bits.net/2010/05/03/mac-mini-disk-ii/

Dean

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Re: Apple //c monitor horizontal sync

speedyG - there are "in progress" shots on my flickr page here:
http://www.flickr.com/photos/charles_mangin/sets/72157628540220857/

and as for my previous Frankintoshes, there are some others documented there as well. share and enjoy Smile

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Re: Apple //c monitor horizontal sync

yep. the G4 in the DiskII was me, too Smile

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Re: Apple //c monitor horizontal sync

I've got it working!
http://www.flickr.com/photos/charles_mangin/6932218955

SwitchResX activates a bunch of resolutions that normally aren't available unless the monitor is "detected", including NTSC and PAL refresh rates. (http://www.madrau.com/SRXv3/html/SRX/indexSRX.shtml)

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Re: Apple //c monitor horizontal sync

I´m glad its solved and off the table....
and thanks for the links ... its great.... it remebers me in a special way to some other people in japan that started to build valve-amplifiers in the strangest cases ... like a valve-amplifier for headphone in a toaster.... no limits to creativity ... !

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Re: Apple //c monitor horizontal sync

build complete:
http://www.flickr.com/photos/charles_mangin/6941864961

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Re: Apple //c monitor horizontal sync

Another fantastic build. Well done.

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