Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2021-12-24, 01:47

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@feipoa ET4000/w32i worked fine on all 286 motherboards i touched so far. I use the very late 2Mb model from Micro-Labs. STB Nitro and Diamond Speedstar 64 (both CL GD-5434 based) don't work on 286 mobos. @bitwrangler Never tried F82C451 ISA. Curious now. This Diamond Speedstar 24 model is great fit …

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Re: Setting-up a fast ISA 486 System

Posted on 2021-12-22, 18:29

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you want FAST 486 ISA - Symphony Haydn based mobos cover that best. UMC ones - not so much. : )

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2021-12-21, 06:23

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Something just crossed my mind. Dont know why didn't think and try it before. For cpu upgrades and extra ram it may be better to use one of the very late 286 mobos like this one, or similar. They are not speed demons because of built-in wait states, but support up to 16mb ram and with proper cpu …

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2021-12-21, 03:34

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

never touched the battery related jumpers because i dont have external battery contraption. the onboard battery worked well so never looked what the jumpers do or what the related wiring is. what ram card you have over there ?

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2021-12-21, 03:29

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

it was a typo. fixed it. 1542c#

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Re: Stealth64 DRAM T VLB Trio64 86c764-P vs. 86c764X

Posted on 2021-12-20, 15:13

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I was simply not aware of this and the other thread where I shared the 2.09 version. To me the different bios versions didn't do anything special. So never a point of interest, otherwise would respond 2-3 years ago. I assume the other contributors here come from similar place.

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2021-12-20, 08:19

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the clarifications. At 16mhz scsi will be better than ide. The difference in perf between the 3-4 15xx models is actuallly significant. With 1542c being much better than the early models. At around 20mhz scsi and ide get on par. Past the 20mhz ide pulls ahead. That's what I see here. …

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-19, 16:20

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Good to hear I am not the only one here.

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2021-12-19, 16:13

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Catching up on this thread. Good to hear that you got the fpu working. I feel it motivates me to take another look at the upgrade module here. Too bad you are not able to go post 32mhz on the cpu. And is l1 cache enabled ? I assume so, right ? Last week I was about to look at this floppy issue bot …

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-18, 15:59

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

But it absolutely allows 40mhz with 512kb l2 cache and tightest timings easily. That's one of its main qualities. In fact it does it at 50mhz just fine too. Mentioned it before in other threads - one of the very best 486 mobos out there.

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-18, 07:23

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Never saw a PVI with AV9155 clock generator. Anyone ? Remember looking at the av9155 datasheet, but it seemed incomplete. The listed frequencies didn't make sense.

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-17, 18:28

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, apologize for the stereotype. Will blame it on limited imagination that portrays most members around here like: ... Yesterday shirt (?!) ;) Yesterday's? You must be organised if you think that is old :) Hard dependency on marriage status there. A certain factor in my household prohibits …

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-17, 18:11

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

These are both B4 stepping which appears to be latest.

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-17, 17:59

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, apologize for the stereotype. Will blame it on limited imagination that portrays most members around here like: 40+ years old male. Nice person. Possibly glasses. Possibly unshaved. ... Yesterday shirt (?!) 😉

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-17, 10:02

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Exactly. These are not fractions, but major / minor versions. Common everywhere. --- Gender was not obvious. She she is then.

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-17, 08:02

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think he posterized it - basically reducing the numbers of colors, effectively working around PNG's low levels of compression. Better will be conversion to jpg or another algorithm that does better at lossy compression.

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Re: 3 (+3 more) retro battle stations

Posted on 2021-12-17, 08:00

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Well, big brand PCs are bad investment. A fact. So your story checks out. Pay more, get less.

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-17, 07:31

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So far didn't stumble upon PVI SP3 that does EDO. At best they can complete POST with some specific EDO RAM modules but BOOT is not guaranteed, let alone reliable system. In fact the same applies to late SiS 471 revisions. Chipset dates are 94/95. Didn't notice specific pattern there. Steppings and …

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Re: 3 (+3 more) retro battle stations

Posted on 2021-12-17, 03:09

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

My first 286 PC was had Headland "chipset" based motherboard. Putting the word chipset in quotes because it was early/cheap PCB design with very low level of integration - lots of chips. 16MHz CPU "beast". But soldered on board. But burdened by truck-load of wait states. Yet it was different back …

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Re: Asus PVI-486SP3 known revisions

Posted on 2021-12-16, 16:17

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks. I am not sure if the presence or absence of the jumper brings any evidence or has any meaning in general. So what is the stepping of the boards you have.

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