Maybe so but the RAM access timings are lightly controlled by the Videl anyway... Might be interesting to see if it has a slightly different part number than later Falcons...Steve wrote: Fri Apr 23, 2021 9:30 pm @stween Could you post a screenshot of your RAM card? I'm thinking it might have high latency chips.
Can all registered uses please login, even just for a few minutes..
It helps build a picture where our "good traffic" is coming from..
Thanks :)
It helps build a picture where our "good traffic" is coming from..
Thanks :)
Falcon maintenance
Re: Falcon maintenance
Re: Falcon maintenance
Sure; here's what I've got:Steve wrote: Fri Apr 23, 2021 9:30 pm @stween Could you post a screenshot of your RAM card? I'm thinking it might have high latency chips.
- IMG_20210423_221215.jpg (228.95 KiB) Viewed 4154 times
Re: Falcon maintenance
And here's the VIDEL chip:exxos wrote: Fri Apr 23, 2021 9:32 pmMaybe so but the RAM access timings are lightly controlled by the Videl anyway... Might be interesting to see if it has a slightly different part number than later Falcons...Steve wrote: Fri Apr 23, 2021 9:30 pm @stween Could you post a screenshot of your RAM card? I'm thinking it might have high latency chips.
- IMG_20210423_230153.jpg (290.01 KiB) Viewed 4152 times
Re: Falcon maintenance
Exactly the same one as in my Falcon...
Do you have the same oscillators ?
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Re: Falcon maintenance
Here's what I have:
- IMG_20210424_003430.jpg (213.37 KiB) Viewed 4125 times
Re: Falcon maintenance
@stween I think it's because your ram is 80ns, I've seen other boards with as low as 60ns before.
Re: Falcon maintenance
How would the videl know what RAM speed was fitted ? Same as any other ST, you can fit any speed of RAM from 250ns to 50ns and it makes no odds as the MMU is hardwired to run at the same speed regardless.Steve wrote: Sat Apr 24, 2021 9:21 am @stween I think it's because your ram is 80ns, I've seen other boards with as low as 60ns before.
Re: Falcon maintenance
Oh okay, sorry I had a misconception of how that worked 
I guess I was thinking of CAS latencies on PC's and how they influence speed.
I guess I was thinking of CAS latencies on PC's and how they influence speed.Re: Falcon maintenance
@stween
On U63 - pin 19 has a 4.7K, solder another 4.7K across it.. And solder another 4.7K from VCC (pin 20) to pin 2.. It may or may not do anything but worth a try..
On U63 - pin 19 has a 4.7K, solder another 4.7K across it.. And solder another 4.7K from VCC (pin 20) to pin 2.. It may or may not do anything but worth a try..
- Capture.PNG (141.88 KiB) Viewed 4083 times
Re: Falcon maintenance
NEVER seen an Atari 14mb Falcon ST RAM card.
Double wow. Not only the size, but cost at that time was huge.
One expensive Falcon there.
Double wow. Not only the size, but cost at that time was huge.
One expensive Falcon there.