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Old 25 July 2021, 03:54   #1
videofx
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33Mhz CPU Crystal for 68060

Anyone know where I can get a 33mhz crystal for my 608060

It uses Fox F1100E four pin crystal

Thanks!
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Old 25 July 2021, 04:06   #2
shaf
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Digikey has a few but look under Oscillators for the 4 pin types, ACH-33.000MHZ is available.

Shaf
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Old 25 July 2021, 19:32   #3
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Shaf,

Thanks for the quick reply. I will check it out!!
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Old 25 July 2021, 20:19   #4
videofx
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Shaf, that Oscilator is the half size. I need 14 pin din. But no worries. I found on ebay for 99 cents 32mhz crystal Fox F1100E which is a direct replacement for my 25mhz crystal. So I will only get 64mhz and not 66mhz. I don't think it will make any speed difference. And the 68060 should run a little cooler
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Old 26 July 2021, 01:40   #5
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Wouldnt you need a 66mhz crystal to run at 66 with an 060? I know in my apollo with an 040 a 66mhz crystal runs at 33 with an 040 and 66 with an 060?
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Old 26 July 2021, 12:11   #6
nogginthenog
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I was thinking the same. My 50Mhz 68060 has a 50Mhz crystal. Maybe it depends on the board?
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Old 26 July 2021, 12:42   #7
zipper
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Yes, seems that GVP is different compared to other makes.
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Old 26 July 2021, 16:31   #8
Maffi
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Quote:
Originally Posted by videofx View Post
Anyone know where I can get a 33mhz crystal for my 608060

It uses Fox F1100E four pin crystal

Thanks!

HTML Code:
https://centuriontech.eu/product/adjustable_system_clock/
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Old 27 July 2021, 21:15   #9
videofx
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Quote:
Originally Posted by Maffi View Post
HTML Code:
https://centuriontech.eu/product/adjustable_system_clock/
Thanks Maffi! That looks interesting.
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Old 27 July 2021, 21:17   #10
videofx
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Quote:
Originally Posted by sneeker View Post
Wouldnt you need a 66mhz crystal to run at 66 with an 060? I know in my apollo with an 040 a 66mhz crystal runs at 33 with an 040 and 66 with an 060?
On my 060 accelerator it has a 25mhz crystal so that runs the CPU at 50mhz, so to get 66mhz I need a 33mhz crystal.
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Old 27 July 2021, 21:43   #11
jrobbins70
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My 2c: you might not be able to overclock that GVP. The timing of the 25mhz crystal is also for the board, ram etc.

I had very little success overclocking GVP products back in the day.

Also, definitely have a cooler on that CPU if it is original from the 90s since they ran super hot.

J
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Old 27 July 2021, 22:57   #12
torsti76
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This is a Rev. 1 68060. If it even runs at 66 MHz (some are reported to be able to) you can boil an egg on it...
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Old 27 July 2021, 23:55   #13
videofx
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Thanks! If it can be overclocked great. If not Im only out $4.00

I burnt my 4000 3.2 ROMS today so we will test at 50mhz and 64mhz.

Ill let you know if it works!

Thanks for all the answers
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Old 28 July 2021, 20:34   #14
nogginthenog
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Maybe you should try a selection of clock crystals?

My CyberStorm MKII (also an early XC version) worked at 66Mhz but the SCSI module didn't like it. I'm a little scared of breaking it!

At 50MHz it never gets really hot (A4000).
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Old 30 July 2021, 03:55   #15
videofx
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We are off to a good start. I put the 32Mhz crystal in the accelerator and it booted. So in order to see if it really works, I need to complete the build.
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