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Re: kludge’s TF534 build
Posted: 28 Jun 2019 12:56
by 8 Bit Dreams
This may be a crap CPU, have similar issues with at least 15x 33Mhz CPUs ive bought recently.
Try to swap it out for known good one :roll:
Re: kludge’s TF534 build
Posted: 28 Jun 2019 13:00
by kludge
8 Bit Dreams wrote: 28 Jun 2019 12:56
This may be a crap CPU, have similar issues with at least 15x 33Mhz CPUs ive bought recently.
Try to swap it out for known good one :roll:
I’ve tried with one Motorola and one Freescale, both EC variants rated for 40 MHz. Guess I’ll try swapping in the Motorola that sits in my working TF534 (also EC/40 MHz) to see if that works.
I REALLY hope that it isn’t the CPU
Re: kludge’s TF534 build
Posted: 28 Jun 2019 13:43
by kludge
The Freescale CPU works fine at 50 MHz in the other TF534, so that wasn’t it. Phew.
I’ll reflow the bus CPLD later to see if I have an intermittent connection somewhere.
Re: kludge’s TF534 build
Posted: 29 Jun 2019 00:32
by chue
Are you using a used CPU socket? I've had glitches with dirty / loose socket pin receptacles. To test this I put my CPU in at a slight angle so that the CPU pins make good contact. After verifying that it worked, I sprayed the socket with contact cleaner and the glitches went away.
Re: kludge’s TF534 build
Posted: 29 Jun 2019 21:22
by kludge
chue wrote: 29 Jun 2019 00:32
Are you using a used CPU socket? I've had glitches with dirty / loose socket pin receptacles. To test this I put my CPU in at a slight angle so that the CPU pins make good contact. After verifying that it worked, I sprayed the socket with contact cleaner and the glitches went away.
I'm making my own out of brand new female headers. I've cut a jig for it in a CNC router and they seem solid enough. I've replaced the CPU in the first one multiple times without any glitches, so I don't think that's it.
Re: kludge’s TF534 build
Posted: 14 Sep 2020 23:02
by kludge
Ok. An update more than a year later 😄
A year ago I started replacing the CPU socket, and while doing so I ripped some traces. Because I’m an idiot. And my desoldering gun had a bad tip.
So I shelved the entire thing and haven’t looked at it since. Well. I bought a PCB from @8 Bit Dreams. Then I shelved it.
Until today. Today I started transplanting the CPLDs, RAM, buffer and stuff to the new board. I think it went quite well.
We’ll see in a couple of days when I’ve got time to continue :)
Re: kludge’s TF534 build
Posted: 15 Sep 2020 10:45
by Danoo
kludge wrote: 14 Sep 2020 23:02
Ok. An update more than a year later 😄
Looks like your project and time management is on par with my own, I have more than a dozen Amiga hardware projects on the go ATM and I just keep buying more. :stars:
(eg. 3 x A2000 MB to repair, 2 x A1200 Re-Amiga builds, 4000ATX build, A1200 desktop build, CD32 repair and a assortment of open source PCBs to build) :dizzy:
I finally found the time to complete a couple of TF536 in the last few weeks so I am kicking some goals occasionally :roll:
I did find the 534 was a little more tedious to build than the 536
Good luck with the finishing the TF534,
Re: kludge’s TF534 build
Posted: 15 Sep 2020 11:29
by kludge
Danoo wrote: 15 Sep 2020 10:45
Looks like your project and time management is on par with my own, I have more than a dozen Amiga hardware projects on the go ATM and I just keep buying more. :stars:
(eg. 3 x A2000 MB to repair, 2 x A1200 Re-Amiga builds, 4000ATX build, A1200 desktop build, CD32 repair and a assortment of open source PCBs to build) :dizzy:
I finally found the time to complete a couple of TF536 in the last few weeks so I am kicking some goals occasionally :roll:
I did find the 534 was a little more tedious to build than the 536
Good luck with the finishing the TF534,
I only work on hobby projects when I want to, so if I get stuck or mad I just put them away for a while while I work on other stuff :)
Yeah... Rub it in with the 536 will ya. I probably missed my chance :D