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

Posted on 2017-07-19, 04:53

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That is a listing for shipment to the USA only. They do not ship to Canada. The majority of the world are not as fortunate cost-wise as Americans. Even for $300 with a PGA168 interface, I am financially strapped right now. Wife is on maternity leave (where did that third child come from!?) and some …

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

Posted on 2017-07-18, 23:57

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah, but not worth it for the current goal at hand.

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

Posted on 2017-07-18, 23:30

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I can certainly test the CLK2 pin with the CPU removed. I can probably also test it with the CPU installed, but I do not have thin enough jumper clips to fit between the pins, so I will have to wrap up the CLK2 pin with a 30 AWG solid core wire and hope it doesn't slip off when I insert the CPU. …

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

Posted on 2017-07-18, 21:57

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

$158, indeed expensive for a passive interface board. BloodyCactus, you packin'?

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

Posted on 2017-07-18, 21:23

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

you need a real logic analyser (not a usb toy one either). I have a HP 1670G ist a beast. with all the exposed pins on the interpose board it should be a cakewalk to connect and probe pins. 136 channels? that thing is a beast. Are you offering to help? It would take forever to hookup the 136 cables …

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

Posted on 2017-07-18, 19:55

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The only way the issue could be co-pro related is if the 486SXL2 was a a 486DX. Remember, the 486SXL2 PGA168 is the same as the 486SXL2 PGA132 chip. So the motherboard is already wired up to work with a seperate co-pro. It is only when you insert the 486SXL2 PGA168 into a proper 486 mothreboard that …

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

Posted on 2017-07-18, 10:23

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

When I install the PC analyser card, the code which is displayed is 01. I beleive this is the first sequence of tests. The booklet which came with the PC analyser card says that 01 is: Processor Test 1, Processor status (1FLAGS) verification. Test the following processor status flags: carry, zero, …

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

Posted on 2017-07-18, 10:15

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Jesus, that Kingston thing is loaded with glue logic chips, far more than what the Transcomputer 486HPi has on it. Does it work with a DX4, Cyrix 5x86, or DX5? And is it specific to a particular system? Do you have any of the Transcomputer modules?

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

Posted on 2017-07-18, 05:50

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by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

luckybob wrote: I have a 486 > 386 upgrade interposer in my ibm model 60. fits a standard 486 into a 386 socket. Would pics help? Pics of 386 to 486 interposer boards are always welcome.

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

Posted on 2017-07-18, 05:49

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have one of those ISA logic analyser boards. I didn't think to try it because they have never really helped me in the past. Perhaps I don't really know how to use it. My understanding is that the final code displayed on the LCD is where the error lies? I'll plug in the board and see what code it …

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

Posted on 2017-07-18, 00:01

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I remember back when I was creating a native PS/2 mouse implementation. http://www.vogons.org/viewtopic.php?f=46&t=36122&start=20 I thought I had everything perfect, then someone commented to ensure that I connected the IRQ12 line. That was all that was needed. My gut feeling is that the issue now …

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

Posted on 2017-07-17, 11:25

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I also tried using the Transcomputer 486HPi upgrade module with the TI486SXL2-66 installed. I set the Transcomputer module up for 486SX pinout, but I did not see any signs of life when powering on the system. I can even use the Transcomputer with an AM5x86-133 chip and still have the 386 motherboard …

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

Posted on 2017-07-17, 11:25

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Recently, I created an interposer module to translate the 168 pins (486 socket) of a Texas Instruments TI486SXL2-G66 to that of a 132 pin socket (386). From what I could discern after reading the TI486SXL Reference Guide, found here: https://archive.org/details/bitsavers_ …

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Re: Underrated PCI 3D Accelerators

Posted on 2017-07-17, 09:24

by

by feipoa

in Marvin \ Video

in Marvin \ Video

I think these are going to be the best all round cards if you want to run a bit of dos or windows 98se, for strictly windows XP I presume its going to be a fight between the ATI 9100 & Geforce fx6200 but I believe its going to be largely dependent of how you interpret benchmark performance as I …

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Re: Underrated PCI 3D Accelerators

Posted on 2017-07-16, 19:13

by

by feipoa

in Marvin \ Video

in Marvin \ Video

Just purchased 2 Quadro fx600s so it'll be a couple of weeks and I'll have a good stash of pci cards to test, hopefully the fx600 will overclock to fx5600 speeds and I'll be satisfied I've tested all the relevant high end pci cards for this era (win98-early XP, max directx8). Where did you find two …

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Re: Windows NT Build

Posted on 2017-07-08, 10:55

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by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you have never setup a system around NT4 before you will probably run into quite a few driver issues and tweaking needs. In my experience, NT4 was probably the least consumer friendly in terms of setting it up, but once you have everything properly configured, it was a really stable system, at …

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Re: Dead Tomato/Zida motherboard?

Posted on 2017-07-07, 09:18

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

it exploded!

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Re: Dead Tomato/Zida motherboard?

Posted on 2017-07-07, 00:25

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Remove the BIOS chip and check for corrosion. You might also want to desolder the DIP socket for the BIOS and check for corrosion. Often, there is quite a bit of hidden corrosion around there when it is this close to the battery.

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Re: Undervolting Cyrix cpu

Posted on 2017-06-30, 09:20

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by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would give 2.1 V a shot. I sorta recall these CPUs not liking higher voltages.

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Re: Undervolting Cyrix cpu

Posted on 2017-06-29, 23:23

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What voltage are you running the MII at with 300 MHz? And what voltage with 285 MHz?

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