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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-02, 18:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

An alternative, scsi. I was able to get 128gb working in windows 95 osr2 using a adaptec isa controller and a 15k rpm scsi 80 pin drive on adapter on my 486 class system running a POD Here is another good mechanical option that should work as noted before. I use this all the time. Microdrive It runs …

Re: Why is my Super Socket 7 super slow untill POST happens

Posted on 2022-12-02, 18:00

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

When I have a weird issue like that, I go back to basics. Single bank of known good ram, also try a different set, known good cpu, try another also, pull all but video card, try another different brand also. Reset cmos, try a different version, Try this and that until you have narrowed the problem …

Re: Why is my Super Socket 7 super slow untill POST happens and P3 800MHz on Slot1 mobo

Posted on 2022-12-02, 16:56

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I’d edit these into separate threads Ss7: Try removing all cards and trying different ones

Re: Zeos motherboard project

Posted on 2022-12-02, 16:53

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just ordered 4 It’ll honestly be nice to not have that odd simm slot populated haha

Re: Zeos motherboard project

Posted on 2022-12-02, 16:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This memory okay? Look up the chip codes: tms427809 The '4' suggests Fast Page, which is good. Having a bit of trouble decoding the rest (or finding a data sheet). That '2' might indicate low-voltage 3.3V chips, which isn't good on a 5V board like this. But it might not... Don't you have two bog- …

Re: vrm module project thread roundup, share ideas, make new designs

Posted on 2022-12-02, 16:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Latest calamitylime versions Re: Socket 5/7/SS7 (Voltage Interposer) Tweaker. (Beta) Re: Socket 5/7/SS7 (Voltage Interposer) Tweaker. (Beta)

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

Posted on 2022-12-02, 15:57

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

We could go pwm and use a murata module? Reconfigure for an external power supply and use calamitylime’s inline power supply. See pcb projects link in sig

Re: Pentium MMX overclock - Does it affect it's lifespan?

Posted on 2022-12-02, 15:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The fsb doesn’t have much to do with the cpu. If the mobo can handle 100fsb (any ss7 should) then just set that. As far as core, most pentium mmx chips can do 250mhz pretty easily at 2.8v so 100x2.5

Re: Discord

Posted on 2022-12-02, 15:51

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I like the ultimate retro, retro web discord. Their name keeps changing 🤣

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

Posted on 2022-12-02, 04:59

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here is powering the cpu externally. FF45C6BA-DAF5-4D29-B5E0-F7217D5C4213.jpeg You must check the bench psu doesn’t have live negative. It should be floating or bonded to netural/case/ground. Some power supplies have a negative that has potential to case/ground/neutral. Don’t use it if this is the …

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

Posted on 2022-12-02, 04:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh, hey… remember earlier in the thread when I said I thought it was weird that the regulator was referencing vcc3 for the trim pot, pull the trim pot off and reference it to vcc5 and see what happens. The regulator its self may be feedback looping is my theory. Why reference the very voltage you …

Re: Zeos motherboard project

Posted on 2022-12-02, 03:50

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I’d also like to get the scsi working eventually. So if anyone knows a card that I can order and rob a chip and crystal from, lemme know.

Re: Zeos motherboard project

Posted on 2022-12-02, 03:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Any suggestions for a removable battery clip that will fit?

Re: Zeos motherboard project

Posted on 2022-12-02, 03:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This memory okay?

Re: Zeos motherboard project

Posted on 2022-12-02, 03:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay, I’m in front of it again. How’s this cache stick look? Edit: note the color coded pinout on the extra power plug orange for 3.3v and black for gnd.

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

Posted on 2022-12-02, 02:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh, hey… remember earlier in the thread when I said I thought it was weird that the regulator was referencing vcc3 for the trim pot, pull the trim pot off and reference it to vcc5 and see what happens. The regulator its self may be feedback looping is my theory. Why reference the very voltage you …

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

Posted on 2022-12-02, 02:21

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

More I think about this, the simple fact that you were for all intents and purposes able to match max overclock with a legit oem interposer using the Sphereterposer™ (JK) suggests that the signal routing is acceptable. And that the power noise falls within (the real) acceptable limit for the cpu. …

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

Posted on 2022-12-01, 23:52

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If that ground plane is oscillating I’m gonna be at a loss as to what to do about it, it’s connected to every single vss pin and interconnected to its self all over the place, i can’t think of a way to make it more solid. Like seriously, that ground plane is amazing for such a tangled spaghetti that …

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

Posted on 2022-12-01, 23:10

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

can you clarify what your conclusion is, do you believe that the noise is due to the regulator, wrong cap combo, wrong cap placement? or due to the pcb signals cross talking or due to both. Any chance you could take your oscilloscope and probe the various signals to try to find one that correlates …

Re: Which USB 2.0 cards for old motherboards

Posted on 2022-12-01, 19:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think that card pictured is using one of the chips that really slows the system down on socket 7 builds I have tried it on. I like that internal header design though. That is handy for specific builds I found it is best to put a hub on the usb 1.1 Yeah that's a good idea. Unfortunately, for my …

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