Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-13, 21:37

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What I meant by the ‘generic’ FPU indication is that when CHKCPU shows a 80287, it can be an Intel 80287, 80287XL, AMD 80C287, Cyrix 82S87, or IIT 2C87. Likewise, an indicated 387 can be an Intel 80387, 387DX, 387SX, 387SL, IIT 3C87, 3C87SX, 4C87, Cyrix 83D87/387+, 83S87, EMC87, 487S/DLC, ULSI …

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Re: What is CL- and CL+?

Posted on 2022-12-13, 21:36

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It has something to do with the turbo LED

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-13, 15:22

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What I meant by the ‘generic’ FPU indication is that when CHKCPU shows a 80287, it can be an Intel 80287, 80287XL, AMD 80C287, Cyrix 82S87, or IIT 2C87. Likewise, an indicated 387 can be an Intel 80387, 387DX, 387SX, 387SL, IIT 3C87, 3C87SX, 4C87, Cyrix 83D87/387+, 83S87, EMC87, 487S/DLC, ULSI …

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-13, 02:46

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So the bugfix you alluded to in the previous post regarding the FPU type has not yet been implemented?

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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-11, 03:08

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

if you cut them prior to soldering like feipoa suggested you can get them almost completely flush, there is really no downside Trouble soldering properly is the downside. Solder needs surface to adhere. it's not a problem, I've done it many times you heat the pad, then flood it while keeping heat …

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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-11, 02:59

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

if you cut them prior to soldering like feipoa suggested you can get them almost completely flush, there is really no downside

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-10, 18:39

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks again for all these new reports! :) It showed me that a lot of the new logic I put in this updated CHKCPU works as expected. Only the FPU detection on 386 systems is clearly bugged. When Intel introduced the 80387 FPU in 1986, the 80386 CPU was already a year on the market. During that time, …

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-10, 03:40

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Finally on my 386sx, the speed is bang on but the co-processor is actually a 387sx

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-10, 03:39

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

And here it is on the 5162, dead on accurate

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-10, 03:16

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

maxtherabbit wrote on 2022-12-04, 20:00: Seems to be working just fine for me, though I'm not sure why it wrote the same information to the report file 4 times. I only ran report.bat once. Same system, new version

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-08, 22:42

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This time it got the 286 speed exactly right. I'll try at again on the 20MHz system later on but it nailed the 12MHz one.

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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 17:00

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I get that he upset you and this is your thread but this thread is really long now and everyone is participating the guys post while lacking a little tact was on topic he is right the responses have been rather toxic to him and I want that to stop The responses he's getting are perfectly …

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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 15:43

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

coming into a thread about a community designed open source device with a closed source commercial pay to play "alternative" is just a bad look, I'm shocked you don't understand that more likely you do and just don't care

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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-05, 14:22

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

feipoa wrote on 2022-12-05, 14:09: However, this may not be necessary because if you haven't soldered the PGA on yet, you can fit an 0805 tightly between the pins, like so: IMG_1100.JPG 0603 is a bit harder to solder. that's actually fairly elegant, I like it

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-05, 00:28

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Chkcpu wrote on 2022-12-04, 22:22: I assume this 286 CPU is running at 20MHz, and has indeed a 80287 companion? yessir

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-04, 20:00

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Seems to be working just fine for me, though I'm not sure why it wrote the same information to the report file 4 times. I only ran report.bat once.

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Re: PGA132 rotator boards

Posted on 2022-12-04, 19:16

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ah blind buried isn’t supported by jlcpcb You sure? I know for certain they don't let you bury them under copper layers - but if you set the type to blind/buried and choose the outtermost coppers as start and finish it should pass DRC Alternatively you just manually edit the solder mask layer with …

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Re: PGA132 rotator boards

Posted on 2022-12-04, 18:42

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sphere478 wrote on 2022-12-04, 16:06: 90* Not sure, how do I do a tented via in kicad? Or is it a option when ordering? I believe you just go to its properties and change type to blind/buried. As long as the correct copper layers are selected it should do what you want

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Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Inviting testers

Posted on 2022-12-03, 18:57

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

awesome, I'll try it on my <386 systems

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Re: 3 (+3 more) retro battle stations

Posted on 2022-12-03, 18:56

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by maxtherabbit

in Marvin \ System Specs

in Marvin \ System Specs

pshipkov wrote on 2022-12-03, 16:59: 4x40 + 1024Kb L2 cache is fine. My crammed posts are not a straightforward read. CPU BURST WRITE - noticed some other boards have an issue with that with non Cy-5x86/P24# CPUs. I could never get my lucky star to boot with that enabled either (Am5x86)

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