Re: K6-2/3+ Success on Asus P5A 1.06 - simple mod

Posted on 2022-09-16, 18:02

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got myself another P5A v1.06 today (with K6-2/500 and 128MB RAM), need to mod it and run some tests with K6-III+. Hope this one is OK. 2 hasn’t been known to mod to 3 or 3+ Only 2+ You can make a 2 with a 2+3+ though by moving the second resistor Anyway, my personal experience with 1.06 hasn’t been …

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Re: Upgrading L2 cache via COAST module - 0 kb when plugged in

Posted on 2022-09-16, 17:58

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is there a need for new coast sticks? I know someone made one that fits those oddball 486 mobos that like to blow up with the more common coast sticks. Can we identify the differences between various types of coast configurations and make one that was programmable for different motherboards? Maybe …

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Re: WIN95 16/32MB performance difference much?

Posted on 2022-09-16, 17:50

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Intel 430NX Chipset- Release date: 1994-03 (period correct), Supports Pentium 90 to 133 MHz CPUs, Cacheable memory - up to 512 Mb. 🙂 Of course certain chipsets could cache more than 64 MB. No one was claiming otherwise. The 430HX is another such example. My point was that the 430TX (as well as the …

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

Posted on 2022-09-16, 16:23

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sphere I have no doubt you will be able to route this board - but how will you assemble it? Two overlapping through hole sockets seem impossible to hand solder... I agree about this consern. Feipoa is figuring single row pins may be the answer to this. Could work? 🤔 let’s see what Feipoa can do. In …

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Re: K6-2/3+ Success on Asus P5A 1.06 - simple mod

Posted on 2022-09-16, 15:58

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got myself another P5A v1.06 today (with K6-2/500 and 128MB RAM), need to mod it and run some tests with K6-III+. Hope this one is OK. 2 hasn’t been known to mod to 3 or 3+ Only 2+ You can make a 2 with a 2+3+ though by moving the second resistor Anyway, my personal experience with 1.06 hasn’t been …

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

Posted on 2022-09-16, 08:24

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just added j1 hardwire to vcc5 (5v) (doesn't need a switch?) there is no connection on a10 C11 As you said. The rest of your list looks accurate. Confirmed discrepancies aren’t going anywhere. My list was just a quick glance, not a full accounting. But looking closer, Everything appears as you …

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Re: Advise a good VGA card for 8-bit ISA slots?

Posted on 2022-09-16, 07:53

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

keropi wrote on 2022-09-16, 07:28: Sphere478 wrote on 2022-09-16, 07:11: That reminds me, there is another one called the graphics gremlin or something rather. isn't it a CGA card though? I do not think it does VGA You may be right. Edit: yep, https://github.com/schlae/graphics-gremlin My bad.

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Re: 200W AT power supply

Posted on 2022-09-16, 07:51

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Usually as many as will plug in without splitters. 😀

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

Posted on 2022-09-16, 07:49

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a correction from earlier btw, I mistook the markings on the top socket as belonging to the lower socket in the interior, in fact the two sockets are not clocked the same direction. One is 90* off from the other. I added pin one markers to prevent further mistake. Here is a close up of the …

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

Posted on 2022-09-16, 07:35

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

image.jpg Solved the DRCs in this corner to show you it’s possible. Still have to come back to it though and optimize the flood plane and make the angles and lengths tidy and consistent. I also gotta do some pondering about via size, minimum is 0.2mm hole 0.45mm diameter 0.13 annular (I converted …

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Re: Advise a good VGA card for 8-bit ISA slots?

Posted on 2022-09-16, 07:11

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

keropi wrote on 2022-09-16, 06:48: you can always build Sergey's ISA SUPER VGA: http://www.malinov.com/Home/sergeys-projects/isa-supervga or just get a crappy VGA card with a realtek chipset - they are slow but they work in both 8/16bit slots That reminds me, there is another one called the …

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

Posted on 2022-09-16, 07:02

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It seems that r2 and trim r1, all they do is provide a reference voltage to the regulator. So I don’t think the regulator pulls any power from these at all, just senses it. You could in theory even use higher values intel did something similar to this for bf0/bf1 Intel speced as high as 500 ohm/ …

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

Posted on 2022-09-16, 06:50

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

okay even direct short to 5v it is 4 percent of a watt on r2 lol. so nothing. The trace there can be whatever we want width wise. I've spent the last 30 min having my time wasted by jlcpcb after they told me to set up the design constraints wrong. Figured it out though and confirmed minimum …

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

Posted on 2022-09-16, 05:07

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What is the resistance value of r2 and the current the trace between trim pot, fet, and r2 will experience? basically no current I assume?

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Re: Advise a good VGA card for 8-bit ISA slots?

Posted on 2022-09-16, 02:18

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You should be able to plug in a 16-bit card and let the extra hang over

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Re: Gateway 2000 overdrive build

Posted on 2022-09-16, 02:17

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks 😀

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Re: Cooling fan for Pentium 166 MMX

Posted on 2022-09-15, 20:46

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Any old socket 7 heatsink should do. Some 370 and socket a heatsinks may work. But try and see. In general try to avoid the super high tension clips though.

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Re: Lucky Star 5V-1A / 5V-1B review - scaling form XT levels to K6-II levels

Posted on 2022-09-15, 17:24

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Pentium mmx and tillamook don’t support 1.5x (at least through hardware) Well binned pentium mmx p55c chips will often run at 2.0v but most of them are 2.45v-2.8v The tillamook is 2.0v (1.9v) Do you have a tillamook? If so, good find. You can set those to 4x 100mhz usually. If you don’t know, post a …

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Re: Ram is always halfed with my Soltek SL-54U5

Posted on 2022-09-15, 17:07

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Re: Converted registered SDRAM Some fun info.

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Re: AGP to PCI adapters - any PCB designers here willing to make one?

Posted on 2022-09-15, 16:11

by

by Sphere478

in Marvin \ Video

in Marvin \ Video

Woohoo

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