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Re: Please advise on this late 286 board

Posted on 2020-04-17, 21:27

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It appears to have quite a bit of battery leak damage. The solder joint for the battery's negative point is very greenish-blue, and the SIMM sockets and ISA slots also look like they've got some gunk on them. Yes, but apparently it still boots DOS, and all ISA slots have been tested with a video …

Please advise on this late 286 board

Posted on 2020-04-17, 20:52

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've been thinking about building a 286 , and this one popped up on a local listing, do you think this can be a good start? It's quite compact and has a Harris 16Mhz soldered on it.

Re: 386 motherboard recommendation

Posted on 2020-04-02, 13:00

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Serpent Rider wrote on 2020-04-01, 13:30: https://stason.org/TULARC/pc/motherboards/S/S … 86-386-AD3.html cool, thanks

Re: 386 motherboard recommendation

Posted on 2020-04-01, 12:57

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Serpent Rider wrote on 2019-12-25, 14:53: Late DX boards with integrated 40Mhz AMD 386DX are more common. ALI M1429 386DX40 board.jpg Sorry the necroposting, but do you know the type/brand of this mainboard? I am about the buy one with the exact same layout except with a socketed CPU instead of …

Re: The Ultimate 486 Benchmark Comparison

Posted on 2020-02-12, 14:07

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes they should be the very same, but if you are willing test them both, even cpuchk could show if there is any difference. I ran some quick test on both Ti 486 DX2-80 and It's ST 486DX2-80 and compared them against a Intel DX2-66. It's a VLB system with BIOS timings left on default. Both DX2-80s …

Re: Advice on making a stable VLB build

Posted on 2020-02-11, 21:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for the advice, actually is the only VLB card I have (those aren't easy to find nowadays), but I will get a Cirrus logic card soon... I'm using it on a full umc board (chipset+cpu) so to get decent performance I will probably need to overclock it to 50mhz VLB cards do not really like 50 …

Re: The Ultimate 486 Benchmark Comparison

Posted on 2020-02-11, 20:44

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Has anyone tested a Cyrix 486 DX2-80? I'm interested to see where it stacks up against other 486 CPUs, namely the Cyrix DX2-66. In my build, it seems slower than the DX2-66 I don't have the software or the time to do benchmarking myself. I have these two that I could setup quickly: Ti DX2-80 It's …

Re: Advice on making a stable VLB build

Posted on 2020-02-11, 20:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also at 40 mhz it's stable with 1 wait state but if I use 50mhz the pc gives me black screen, I use 15ns cache, could it be a proble with l2 cache? I'm using vlb video card (ARK Logic ARK1000VL VLB 2mb) and ide vlb controller (Multi I/O Card VLMIO V1.6 PIC). I tried to take off the vlb controller …

Re: Advice on making a stable VLB build

Posted on 2020-02-11, 15:12

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As said above...I have the same motherboard and I found only one card that runs pretty stable at 50 Mhz , the rest is 40 or less. It does not matter which VLB slot you use as long as there is only one card. Only 2 cards VLB setups have some restrictions on which slot is used. If stability is the …

Re: Please help me identify this 386 motherboard

Posted on 2020-01-16, 09:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cyrix200+ wrote on 2020-01-16, 09:35: What's the version of the MR BIOS? We might want it here: How about a MR-BIOS ROM file repository? Bios version is V1.44-UMC_305 I would happily dump the BIOS if someone shed some light on how to do it 😀

Please help me identify this 386 motherboard

Posted on 2020-01-16, 09:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would need the jumper settings for this one, but could not find any ID or model number on it. It is an UMC 386 motherboard with MR BIOS. Thanks

Re: Trident ISA VGA jumper settings?

Posted on 2019-08-06, 14:07

in Marvin \ Video

in Marvin \ Video

I have tried 5424 and 5429 isa vga cards that have the 0ws jumper - it never worked reliably for me... Benchmarks were ok but games or win3 would just crash... The boost is indeed considerable if the system is stable I ran Doom timedemo several times with 0ws on the Trident, not a single crash. …

Re: Trident ISA VGA jumper settings?

Posted on 2019-08-06, 12:19

in Marvin \ Video

in Marvin \ Video

I got a significant boost on my 8900D by enabling 0WS and FIFO. I have tested this quickly with a 8900CL-B (similar to 8900D in terms of performance) which has a soldered jumper for WS: Vidspeed WS1 - 3869 Vidspeed WS0 - 5140 (32% increase) LM60 WS1 - 3870 LM60 WS0 - 5120 (32% increase) 3DBench WS1 …

Re: Please help me connect an AT style MHz display

Posted on 2019-08-02, 12:37

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Figured it out with this incredibly useful collection of Mhz display diagrams http://www.minuszerodegrees.net/led_speed_dis … eed_display.htm

Please help me connect an AT style MHz display

Posted on 2019-08-02, 11:27

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Where should I connect the separate single black wire (marked with "S") so that the display knows if the Turbo SW is pressed (i.e. it changes between high and low values)? Initially I thought this comes from either of the Turbo LED jumpers on the mainboard, but I tried and it didn't work. What I …

Re: Trident ISA VGA jumper settings?

Posted on 2019-08-01, 12:10

in Marvin \ Video

in Marvin \ Video

Rawit wrote: Quick Google: www.s100computers.com/My%20System%20Pag ... Manual.pdf Thanks! This means that it doesn't have one for WS 0/1 (JP2 is missing)

Re: Trident ISA VGA jumper settings?

Posted on 2019-08-01, 11:36

in Marvin \ Video

in Marvin \ Video

derSammler wrote: J9 is for 8-bit mode (all closed = 8 bit, all open = 16 bit). No idea about the rest, there's normally not that much on a VGA card you need to configure. I suspect this has a jumper for WS 0/1 , but way too much combinations there

Trident ISA VGA jumper settings?

Posted on 2019-08-01, 11:27

in Marvin \ Video

in Marvin \ Video

Does anyone have this kind of card? I am looking for its jumper settings, but the only thing I found is that it was made by Protac: https://fccid.io/J4UVGA415BFT4

Re: Bought these (retro) hardware today

Posted on 2019-08-01, 08:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

appiah4 wrote: No cache on the motherboard kind of sucks That's a sign of a defective board in my experience i.e. someone removed the ICs. Let's hope that battery isn't leaking too much.

Re: Bought these (retro) hardware today

Posted on 2019-07-31, 09:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

imi wrote: I was flying home with over 20kg of mostly retro computer hardware in my carry-on That's pretty brave, I was being much more cautious carrying only a crappy Trident ISA for the first time 😀

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