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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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 Posted: Mon Feb 26, 2018 6:39 pm Post subject: CPU Shack: New In Package 486 CPU Upgrade Adapter - SOLD |
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Kind of a cool piece of history.
Here is an upgrade adapter socket for the 486, allowing 486s such as the AMD and Cyrix 5x86 and Intel DX4-100 to be used in old 5V systems
Still in the package
$18
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Last edited by CPUShack on Mon Feb 26, 2018 7:16 pm; edited 1 time in total |
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xsecret
Joined: 01 Feb 2004
Posts: 1847
Location: France
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Mon Feb 26, 2018 7:15 pm Post subject: |
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If you find another I would take it.
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Mon Feb 26, 2018 11:53 pm Post subject: |
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I realise its gone, but do you have a pin-side photo? If the bottom is without IC's, what I like about this adapter is that it doesn't contain additional logic chips. A lot of these upgrade adapters contained PAL or GAL IC's, which I think are added to increase compatibility in some situations. Not knowing exactly what those IC's are doing bothers me. What is they are written for the Cyrix 5x86 in mind but you want to use an Am5x86, or visa-versa.
I keep staring at Table 1 and continue to have no idea what information it is trying to convey.
As for Table 2, I didn't realise the Intel DX4 could run at 2.5x the FSB. Can it?
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WFS2005
Joined: 13 Mar 2007
Posts: 1526
Location: HB China
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| Posted: Tue Feb 27, 2018 12:12 am Post subject: |
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| feipoa wrote: | I realise its gone, but do you have a pin-side photo? If the bottom is without IC's, what I like about this adapter is that it doesn't contain additional logic chips. A lot of these upgrade adapters contained PAL or GAL IC's, which I think are added to increase compatibility in some situations. Not knowing exactly what those IC's are doing bothers me. What is they are written for the Cyrix 5x86 in mind but you want to use an Am5x86, or visa-versa.
I keep staring at Table 1 and continue to have no idea what information it is trying to convey.
As for Table 2, I didn't realise the Intel DX4 could run at 2.5x the FSB. Can it? |
It is look different my
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Last edited by WFS2005 on Tue Feb 27, 2018 12:44 am; edited 1 time in total |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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| Posted: Tue Feb 27, 2018 12:20 am Post subject: |
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| feipoa wrote: | I realise its gone, but do you have a pin-side photo? If the bottom is without IC's, what I like about this adapter is that it doesn't contain additional logic chips. A lot of these upgrade adapters contained PAL or GAL IC's, which I think are added to increase compatibility in some situations. Not knowing exactly what those IC's are doing bothers me. What is they are written for the Cyrix 5x86 in mind but you want to use an Am5x86, or visa-versa.
I keep staring at Table 1 and continue to have no idea what information it is trying to convey.
As for Table 2, I didn't realise the Intel DX4 could run at 2.5x the FSB. Can it? |
Table 1 is saying essentially the same thing as Table 2, but based on the initial system clock (if you have a DX-25 set the jump to 2-3 for the AMD etc)
Pin Side
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H3nrik V!
Joined: 15 Apr 2014
Posts: 1246
Location: Denmark
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| Posted: Tue Feb 27, 2018 2:48 am Post subject: |
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| So, basically, it's a voltage regulator and a multiplier selector .. ? |
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kixs
Joined: 13 Aug 2015
Posts: 218
Location: EU, SI
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| Posted: Tue Feb 27, 2018 2:55 am Post subject: |
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| H3nrik V! wrote: | | So, basically, it's a voltage regulator and a multiplier selector .. ? |
It's just an adapter... and I want a few  |
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Wed Feb 28, 2018 1:47 am Post subject: |
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Its really nice how clean it is from any IC's. I have one from Trinity Works (the Power Stacker), one from Evergreen, and one from Gainbery. They all have IC's aside from the voltage regulator. The only module I have without IC's is an Evergreen unit which contained a QFP Am5x86-133, plus caps, and a VR IC. I'm sure there are more PGA-socketed adapters like this, but I haven't run into one in person without any ICs.
It really makes me wonder how much benefit the IC's provided and if they in some cases they caused more compatibility issues rather than fixes. |
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H3nrik V!
Joined: 15 Apr 2014
Posts: 1246
Location: Denmark
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| Posted: Wed Feb 28, 2018 2:08 am Post subject: |
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I'm so curious now .. 
Would someone start a thread in another section of the forum with pictures of interposers? |
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Wed Feb 28, 2018 3:06 am Post subject: |
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| If you start it, I will post photos of the ones I have. Please post the thread link here. |
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H3nrik V!
Joined: 15 Apr 2014
Posts: 1246
Location: Denmark
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iPonRMA
Joined: 28 Oct 2012
Posts: 256
Location: Hungary
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black_monolith
Joined: 18 Mar 2007
Posts: 248
Location: Shandong, China
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| Posted: Tue Mar 13, 2018 8:35 am Post subject: |
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| I have a few of the modules pictured. They are nice in that they have a small profile, but I don't like how they placed the VRM under the CPU. It would have also been nice if there was a WB/WT jumper. |
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Tue Mar 13, 2018 3:17 pm Post subject: |
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| black_monolith wrote: | | I have a few of the modules pictured. They are nice in that they have a small profile, but I don't like how they placed the VRM under the CPU. It would have also been nice if there was a WB/WT jumper. |
Because of heat dissipation issues, esp. when using a linear regulator? |
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