exxos's Atari, Amiga & retro forum

Any Falcon owners looking for something to do late night (ok, we all have something to do with our Falcons :) ), top and shielding already off, like to request a comparison measurement between 2 COMBEL clock outputs.

Hoped to have a scope by now, wife said I could get one last Christmas. One thing and another lead up to other health expenses eating up that nest egg.

Curious how the COMBEL 16MHz and 8MHz (unused, separate pin) look overlayed on each other. Do they align, drift, ect. Any noted phase difference would be appreciated, I can understand a screen shot of the scope too.

Another point of interest would be the same measurement, 8MHz off COMBEL, with the 16MHz source taken directly at the SDMA CLKEN.
Any clock patch type installed.
Accelerated bus a plus, but stock will do.
Thank you :)

Hey I'm not sure if you still need the OSC. pictures since my Falcon is partially open and I am planning on removing the rest of the shielding for other reasons (NEW DSP Falcon Digital Interface,FDI+)I can probably take few OSC. pictures if you still need them.

According to various forum posts and my looking in the schematics the 8MHz pin192 is not connected to anything in the Falcon. But for the scientific experiment I did manage to grab the signal and compare it with the COMBEL 16MHz signal coming out of pin 191 running in perfect synchronization.

Edit: fIX PIC as jpg.

Edit by Moderator: I have placed images in line. Please see this thread for placing images on the forum. viewtopic.php?f=20&t=2357

Thanks Chris, exactly what I was looking after. Realize it's not connected to the board, but wanted to try to use it without having to run the 16MHz through a PLL or ripple counter to get there.
It's a crazy idea :)

BTW, a month ago FINALLY made a scope purchase. Been cleaning up my 5 year long mess in the "Atari room", have yet to set it up. For instance, discovered I solder right handed, and at first had everything setup to work left handed :lol:

Cat in the photo held up work a bit, was easily distracted by walking into the kitchen and grabbing a pull top can of food.

Edit by Moderator: placed images in-line. Please see this thread for placing images on the forum. viewtopic.php?f=20&t=2357

Mod, thanks.
Usually use the attach file feature as the site has a file size limit. There, the load progress display and occuring error if the file is too large makes it convenient to determine why an upload failed.
The "exact" file size limit of 900k, for me, is difficult to calculate, and "file info" doesn't always match it's actual (on disk) size. So, guess and using the android app QReduce Lite, allow it to resample a same size image to a smaller file size.

AIRC, placing an image inline doesn't show this monitoring.

But as usual, am likely making this much more complicated than it is.

I note the Xaser III PC case in the foreground

stephen_usher wrote: 20 Aug 2023 19:02 I note the Xaser III PC case in the foreground

Mod: Better?

Mine?


This case came from a build for my son in the late 90's. He'd used his Falcon until 2nd year of Highschool. Pentium somethingoranother built by ABS (wow, googled them, went big time now).

Reutilized it again mid-2000's, think it's has one of those expensive little bastards, a P4 3.8GHz 570. Board also new, an IBM 570 board with AGP (couldn't find the model strapped inside the case). Needed that requirement for an ATI AIW 128 AGP video capture setup. File output works well on the Falcon, and Apex once broken down using Sony Vegas. With the last release of MPlayer, can probably do the conversion there now.

It's massive, the removable drive is SCSI.

Interesting my old PC decided to go down with a Popcorn sound ): I heard a loud bang. :D

I think I'm doing this picture attachment wrong.
But it's confusing because of this: ! This post is not visible to other users until it has been approved by a moderator.

Chris O. wrote: 21 Aug 2023 04:40 I think I'm doing this picture attachment wrong.

You are. You don't need to be using the image button, which is intended for external images, only the "place inline" button on your attachments.

Please see the post "How to place photos in a post" for details.