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mtx500
Joined: 21 Nov 2003
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Location: Nuremberg, Germany
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thehinac
Joined: 08 Aug 2014
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thehinac
Joined: 08 Aug 2014
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 Posted: Tue Nov 19, 2019 5:39 pm Post subject: |
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The socket will have to be trimmed down on a sander to fit the board because of the surface mount resisters next to each pad set. But it should work. Using solder paste and a heat gun after cleaning the pads.
Last edited by thehinac on Tue Nov 19, 2019 7:57 pm; edited 1 time in total |
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thehinac
Joined: 08 Aug 2014
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| Posted: Tue Nov 19, 2019 5:49 pm Post subject: |
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| Ordered the sockets and extras, and have one chip for testing coming. I have a spare dead nexgen pci motherboard for test mounting on. I'll post a pic what it looks like before, and after mod, then soldered and IC inserted. |
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feipoa
Joined: 08 Mar 2011
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Location: Canada
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| Posted: Tue Nov 19, 2019 11:02 pm Post subject: |
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I don't think I'm daring enough to modify my board. Perhaps if I had two motherboards, but only if the second board didn't cost me much.
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The only thing I hate more than straightening CPU pins is having CPU's with bent pins in my collection. |
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ph4nt0m
Joined: 01 Jan 2018
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Location: Europe
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| Posted: Wed Nov 20, 2019 12:36 pm Post subject: |
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Done that already with CY7C1009D-10VXI
Before:
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ph4nt0m
Joined: 01 Jan 2018
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Location: Europe
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| Posted: Wed Nov 20, 2019 12:39 pm Post subject: |
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| thehinac wrote: | | The socket will have to be trimmed down on a sander to fit the board because of the surface mount resisters next to each pad set. But it should work. Using solder paste and a heat gun after cleaning the pads. |
I didn't even have to use a heat gun for this job. Two Wellers were good enough.
| thehinac wrote: | | Ordered the sockets and extras, and have one chip for testing coming. I have a spare dead nexgen pci motherboard for test mounting on. I'll post a pic what it looks like before, and after mod, then soldered and IC inserted. |
You better sell that board to someone who can actually fix it. Like me 
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| Posted: Wed Nov 20, 2019 11:20 pm Post subject: |
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| ph4nt0m wrote: | | thehinac wrote: | | The socket will have to be trimmed down on a sander to fit the board because of the surface mount resisters next to each pad set. But it should work. Using solder paste and a heat gun after cleaning the pads. |
I didn't even have to use a heat gun for this job. Two Wellers were good enough.
| thehinac wrote: | | Ordered the sockets and extras, and have one chip for testing coming. I have a spare dead nexgen pci motherboard for test mounting on. I'll post a pic what it looks like before, and after mod, then soldered and IC inserted. |
You better sell that board to someone who can actually fix it. Like me |
Bahahah I've never sold any of my nexgen hardware.
But that's awesome I found the part on my own, and you found the same part and already did it. That's just F'n rocks man. Now I know I'm not just wasting my time. I mean yeah I am, but I know it'll work. Which is awesome. Bad a$$ job man. Props for sure.
I have 3 PCI boards and one of them is damaged so I'm not concerned about it. My soldering skills are pretty good. I did a laptop bga gpu a while back. It was fun. Not sure I'd want to do it again, but it was fun. But by no means an expert. But I have a co-worker in another department that reworks boards for a living and he's helping me. Because alone I'd probably F it up.
Thanks for posting up on this, the pics are awesome proof of ultimate nerd. At least I know I'm not alone out there. |
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thehinac
Joined: 08 Aug 2014
Posts: 14
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| Posted: Wed Nov 20, 2019 11:22 pm Post subject: |
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| Opps didn't login. |
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Wed Nov 20, 2019 11:38 pm Post subject: |
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ph4nt0m, which instrument did you do for the desoldering and resoldering of the SRAM? I usually use the finest Weller tip my iron can take, but as the years have progressed, my hand has become more shakey and I don't think I'm up to this task.
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The only thing I hate more than straightening CPU pins is having CPU's with bent pins in my collection. |
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thehinac
Joined: 08 Aug 2014
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| Posted: Thu Nov 21, 2019 12:47 am Post subject: |
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replaced this post with graphic below.
Last edited by thehinac on Thu Nov 21, 2019 12:53 am; edited 1 time in total |
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thehinac
Joined: 08 Aug 2014
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| Posted: Thu Nov 21, 2019 12:52 am Post subject: |
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These seem odd compared to yours unless I just need to recap or something.
Tried different video cards, changed my memory size, changed bios settings. Nothing.
I can't run sync mode, system won't post. |
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feipoa
Joined: 08 Mar 2011
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Location: Canada
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| Posted: Thu Nov 21, 2019 2:08 am Post subject: |
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I've never been able to get sync mode working (see first page of this thread). Is it supposed to work?
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thehinac
Joined: 08 Aug 2014
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| Posted: Thu Nov 21, 2019 2:47 am Post subject: |
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After reading the white paper below... I'm thinking you might not even be able to use sync on faster -P CPU's ether. I'm thinking maybe the OEM em51256c-12j SRAM might not be able to handle the clock rate. I haven't tested this. Just a idea. I read elsewhere in the doc that the L2 is based on the bus speed.
ph4nt0m's board with the replaced SRAM is 100Mhz 10ns SRAM. So I'd be interested in seeing if he could run a PF110 in bus sync mode.
Could be why the system won't post. ¯\_(ツ)_/¯
https://archive.org/stream/bitsavers_nexGenDxDOssorDatabookDec94_5567817/DxDOC-DB001-03_W_Nx586_Processor_Databook_Dec94_djvu.txt
■ L2 ( Off- Chip) Cache — Operates at the same frequency as the NxCLK. Transfers between
L2-cache and the processor occur at the peak rate of one octet every two processor clocks,
but the transfers (which can be back-to-back) can begin on any processor clock. Data is
returned to the processor on the third clock phase after an access is started.
Unless otherwise specified in this book, a clock cycle means the Nx586 processor's clock cycle.
However, most of the timing diagrams in the Bus Operations chapter are relative to the NxCLK
clock, not the processor clock.
Figure 18 shows the relative clocking frequencies for a Nx586 processor. The NxCLK clock
determines the systems overall operating speed. The NxCLK clock sets the NexBus/NexBus^
operating frequency. The processor's on-board PLL doubles the frequency of NxCLK making the
Nx586 operate at twice the frequency of NexBus. The dual port nature of the LI caches requires the
LI cache controllers to operate at double the frequency of the processor. The effective operating
frequency of the L2-cache is half of the processor. |
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ph4nt0m
Joined: 01 Jan 2018
Posts: 812
Location: Europe
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| Posted: Thu Nov 21, 2019 3:49 am Post subject: |
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| feipoa wrote: | | ph4nt0m, which instrument did you do for the desoldering and resoldering of the SRAM? I usually use the finest Weller tip my iron can take, but as the years have progressed, my hand has become more shakey and I don't think I'm up to this task. |
Weller WECP-20 with the longest conical tip, that's 1" ETS probably. Desoldering done with a help of another Weller, a Magnastat WTCP-S, and two pieces of a thick copper wire. The soldering process is routine, the most important part is to position the chips properly.
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