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i440bx
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rjluna2
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 Posted: Mon Jun 07, 2021 6:49 am Post subject: |
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It would be interested to see if they have different CPUID in between two here  |
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mavroxur
Joined: 06 Jul 2005
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| Posted: Mon Jun 07, 2021 4:57 pm Post subject: |
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| Plant code maybe? |
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i440bx
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CPUShack
Joined: 16 Jun 2003
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| Posted: Mon Jun 07, 2021 10:14 pm Post subject: |
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the DX-50s are very odd chips, they run hot (always made me think the T/C had something to do with thermal/coller requirements.
THey also usually require extra wait states on motherboards to even work, which could also be denoted at least by the T
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Neon_WA
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| Posted: Mon Jun 07, 2021 10:32 pm Post subject: |
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The other choice I had in mind.. is that a lot in their uncleaned state have had OEM stickers.
I am wondering if these OEMs requested additional testing of chips supplied to them & the letters defined compliance to the OEM order requirements
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i440bx
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Neon_WA
Joined: 08 Nov 2008
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| Posted: Tue Jun 08, 2021 1:19 am Post subject: |
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very few cpuids in CPU-world database.. this datasheet is on chipdb.org
http://datasheets.chipdb.org/Intel/x86/486/Intel486.htm
in a few weeks I will download & add markings & other cpuid info from other sources & create a master spreadsheet of 486s
pretty sure Chook has a lot of additional info.. especially timeline info
SX408 is also same cpuid & is marked T. other Ts are SX705 SX710
SX409 unknown stepping? is marked C
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Last edited by Neon_WA on Tue Jun 08, 2021 1:29 am; edited 3 times in total |
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H3nrik V!
Joined: 15 Apr 2014
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Location: Denmark
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| Posted: Tue Jun 08, 2021 1:22 am Post subject: |
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| CPUShack wrote: | the DX-50s are very odd chips, they run hot (always made me think the T/C had something to do with thermal/coller requirements.
THey also usually require extra wait states on motherboards to even work, which could also be denoted at least by the T |
Wouldn't the wait states be required by other peripherals etc. on the main board to cope with the 50MHz bus speed? |
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frag_
Joined: 17 Nov 2008
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Location: Estonia
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| Posted: Wed Jun 09, 2021 10:56 am Post subject: |
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| 486DX-50 is also unique in that according to datasheet it uses more pins that all other i486 (where they are not used) and all corresponding signal names start with T. |
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i440bx
Joined: 30 May 2004
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| Posted: Wed Jun 09, 2021 10:59 am Post subject: |
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| frag_ wrote: | | 486DX-50 is also unique in that according to datasheet it uses more pins that all other i486 (where they are not used) and all corresponding signal names start with T. |
Yes. A look into the datasheet. I should have this idea
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