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

Posted on 2017-08-23, 07:30

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

FLT#, which can be left floating as it contains a built-in pull-up resistor... I also tried setting FLT# to ground at startup and also to set FLT# to GND after power-up, but the result was the same. FLT# is for floating the bus signal. What does your module do with FLT# ? I suspect it is left …

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Re: 386 upgrade kits and the Transcomputer 486HPi - Am5x86-160 anyone?

Posted on 2017-08-22, 23:32

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does it work with an Am5x86-133/160? It does... can set clock multiplier to x2, x3, and x4... ran it on one of the Forex boards I have kickin around... Interesting stuff. Are you sure you have that many multiplier options. AFAIK there is only one multiplier select pin ( R17 CLKMUL ) on the am486/ …

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

Posted on 2017-08-22, 23:27

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The PAL is probably essential for some older motherboards, which is why it is added on the module - to be more cross-platform compatible, particularly on boards which are not L1 cache aware. The TI 486SXL2 PGA132 is the same chip as your TI 486SXL2 QFP144, except that it runs at 5 V as opposed to …

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Re: 386 upgrade kits and the Transcomputer 486HPi - Am5x86-160 anyone?

Posted on 2017-08-22, 09:27

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did you try booting into Windows 3.1 with the L1 cache enabled? No, just DOS & Win95. Why, what happens in Win 3.1? EDIT: - Ah ok, I went back and saw what you did. More for real life function testing. This I will do... I may also run additional benchmarks... DOOM/cachechk etc It would be of …

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

Posted on 2017-08-22, 09:17

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

According to the manual, the QFP-144 and PGA-168 versions should be identical in pinouts, with one exception: the QFP-144 has a second W/R# input. The manual mentions the two W/R# pins must be connected together , then says that, "these devices are functionally the same". Refer to page 1-15. The …

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

Posted on 2017-08-21, 09:43

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK. I see what you are doing now. The question marks ??? probably go to pins on the QFP144. To determine what the group of ??? pins are, you could map all direct PGA132-to-QFP144 pins. The pin designations without direct mappins, and minus the assignments you already found for the PAL and NOR, would …

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

Posted on 2017-08-21, 07:51

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for looking into this. I am having trouble following what connection points you are refering to. Could you add some clarificadtion? What is the following in words? 1, BEO#..20, Vcc e.g. "Pin 1 on PALCE16V8 connects to BEO# on QFP144..." Then what is 20? What is Vcc written there for? Ideally, …

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Re: 386 upgrade kits and the Transcomputer 486HPi - Am5x86-160 anyone?

Posted on 2017-08-21, 07:29

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did you try booting into Windows 3.1 with the L1 cache enabled?

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Re: Which is faster? U5SX 486-33F or TX486DLC/E-40?

Posted on 2017-08-19, 11:10

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by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do any of the motherboards which contain a U5S also have a socket for an FPU? I suspect the U5S at 33 Mhz is similar to a TI 486SXL2-50, but I have not run benchmarks as of yet.

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

Posted on 2017-08-19, 10:34

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

386_junkie: Any update?

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Re: 80s film ?

Posted on 2017-08-17, 19:59

by

by feipoa

in Milliways

in Milliways

I really liked the Rockford Files and Magnum P.I. from the late 70's and 80's. I tried to watch Knight Rider in order 7 years ago, but I couldn't stand it. I stopped after 2 episodes. I like most 70's-90's movies. There is something about them which seems more real. Most of today's movies look more …

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Re: Modern beige rigs & peripherals

Posted on 2017-08-17, 19:41

by

by feipoa

in Milliways

in Milliways

I'd like beige to make a come back, provided someone finds a way to keep the beige from fading, while maintaining all the mechanical and fire retardant properties of the old beige. Does the white that Apple uses fade? Their Mac classics, like the SE/30 I have, has surely faded. All my computers PIII …

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Re: Underrated PCI 3D Accelerators

Posted on 2017-08-15, 02:43

by

by feipoa

in Marvin \ Video

in Marvin \ Video

That is a fairly respectable boost from FX600 to FX5600. it would be nice to see some real game frame rate tests.

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Re: Help with repairing a Matrox M3D **SOLVED**

Posted on 2017-08-14, 03:57

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You stuck the card in a bag of rice to remove extra moisture? How do you know it worked? I've never heard of this, but sounds interesting.

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Re: 486 voltage converters

Posted on 2017-08-08, 06:24

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You click on the forum, then navigate to "For Sale/Trade (collectable items)". Check past listings for unsold items and wait for more listings to come up.

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Re: 486 voltage converters

Posted on 2017-08-08, 01:42

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Keep an eye out on CPUworld for an Intel DX4 overdrive. Prices are often half that of eBay. You can also look for 486 upgrade modules. They often contain an Am5x86-133, which can be replaced with an Intel DX4, if that is what you are after.

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Re: Definition of "Super Socket 7"

Posted on 2017-08-05, 22:12

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Has anyone found a regular socket 7 board which had an unofficial 100 MHz setting? And did it work?

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

Posted on 2017-08-05, 02:14

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Great! How's the progress?

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Re: 386 upgrade kits and the Transcomputer 486HPi - Am5x86-160 anyone?

Posted on 2017-08-03, 02:37

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Pretty large footprint on that thing. Does it work with an Am5x86-133/160?

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Re: Modifying the POD83's voltage regulator for overclocking

Posted on 2017-08-03, 02:34

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is interesting indeed! I've tried to run my P83 at 100 MHz once, but couldn't get it stable. I didn't think that the VRM would be the limiting factor, rather than the CPU itself. I guess an overclocked P83 is by far the fastest option for a socket 3 platform, certainly for Quake :) From my …

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