Re: Chinese 10ns SRAM for L2 cache

Posted on 2019-07-18, 12:16

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Maybe those chips have all pins with NC, but you have a real branded tag chip there, right? Maybe the motherboard doesn't boot with empty sockets yet having the tag chip? It does, I removed the chips leaving the tag chip only in there. I suspect one or more of them is DOA, or they are indeed just …

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Re: Chinese 10ns SRAM for L2 cache

Posted on 2019-07-18, 12:02

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

derSammler wrote: stalk3r wrote: They seem to be low quality, the marking come off as soon as you touch it, etc. They are most likely just a block of plastic... In this case the PC would boot as the sockets were empty 😀

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Re: Chinese 10ns SRAM for L2 cache

Posted on 2019-07-18, 11:57

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Tronix wrote: AFAIK, bank 0 on the left side (curently empty sockets) Nope, sockets U5-U8 are on the right, I have checked that. The table in the manual is misleading a bit.

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Chinese 10ns SRAM for L2 cache

Posted on 2019-07-18, 11:47

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I bought these cheap 10ns 32pin DIPs to upgrade the current 256k to 512k , but the PC does not even boot with it... I know that the TAG is slower but it should boot regardless. The jumpers are good. Has anyone tried these? They seem to be low quality, the marking come off as soon as you touch it, …

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Yamaha YMF701 sound issues

Posted on 2019-07-17, 11:48

by

by stalk3r

in Marvin \ Sound

in Marvin \ Sound

I configured this card with the setupsa.exe and it gets recognized in every game, but I have noticed that it makes some weird clipping noises and other artifacts in Doom and also have issues with digitized sounds in Wolf3D (e.g. a cutoff when opening a door). I tried to change the IRQ but no success …

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Re: Bought these (retro) hardware today

Posted on 2019-07-16, 08:37

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I always wanted a 430HX board back in the day, but since those had carried a hefty price tag, I could not get one. Until now 😀 This comes with RAM, a P200 MMX and a cache module installed. Guess it will make a decent rig for DOS.

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Re: AMD 5x86 @200

Posted on 2019-07-15, 08:10

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

alvaro84 wrote: At 160MHz the cache and RAM can run at full speed but the VLB wait option is still needs that extra cycle, with every VLB VGA I tried. I have a VLB VGA which runs fine WS 0 at 160Mhz Chips & Technologies F64300 VLB vga question

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Re: Co-processor orientation?

Posted on 2019-07-12, 15:28

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Tighter memory timings, Cyrix co-processor and Cyrix 486 CPU, some late board with 486 era chipset also should help. I tried but timing values will go back to original on reboot... it keeps other settings though so I assume it is not the battery, rather it just does not accept certain timings? Also …

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Re: Co-processor orientation?

Posted on 2019-07-12, 14:42

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Serpent Rider wrote: You gotta pump those numbers up. Those are rookie numbers. I know... I have a lazy-ass math processor there apparently. I am open for suggestions though 😀

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Re: Co-processor orientation?

Posted on 2019-07-12, 12:04

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

kixs wrote: Expect around 2 FPS 🤣 Got a staggering 1.6 FPS

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Re: Co-processor orientation?

Posted on 2019-07-12, 11:31

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks guys for the help, it works like a charm. Running Quake timedemo atm, it's gonna take a while 😀

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Co-processor orientation?

Posted on 2019-07-12, 10:35

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does anyone know which direction should I push this onto the socket? Pins are symmetrical i.e. it goes in any direction

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Re: Chips & Technologies F64300 VLB vga question

Posted on 2019-07-12, 09:13

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Tested my card a few weeks ago. It performs good in DOS and Windows. Extra cache chips only increase performance in Windows adding around 25% boost. What I like about it is that it gives pretty good image on modern LCDs, as opposed to e.g. an S3 Trio VLB whose image is utterly crap. I guess it's …

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Re: AMD 5x86 @200

Posted on 2019-07-10, 20:21

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@stalk3r: You're not the only one :lol: It pretty much depends on your luck to find the one special CPU. I'm also after 200Mhz mark and have tested quite a few AMD 5x86-133 cpus... and only one shows POST screen at 200Mhz and freezes... but runs stable at 180Mhz (3x60). In the mean time I bought …

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Re: AMD 5x86 @200

Posted on 2019-07-10, 10:01

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also, normally only one VLB card will work at that speed. If you have more than one VLB card installed, 50 MHz is normally a no-go, as it either doesn't work at all or very unstable. Mine is stable at 3x50 MHz with two VLB cards; a video and a multi i/o. I had to lower the DRAM timings a bit though …

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Re: AMD 5x86 @200

Posted on 2019-07-09, 20:41

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As I've mentioned here , it's possible with the temperatures below zero and SSTV2 practical test showed some potential. But on normal conditions? Nah, not going to happen. Maybe if you cherry pick from few dozens CPUs, but only maybe. I've found another guy who was successful with the sub-zero …

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Re: AMD 5x86 @200

Posted on 2019-07-09, 15:39

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

4V did not help either But it didn't fry it either? :) If you are after speed, try finding a Cyrix 5x86 120 MHz and let that run at 150 MHz. It will outperform the AMD. It is difficult to find such CPU nowadays (and expensive too).. it is more the achievement I am after. Phil has a video on this. …

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AMD 5x86 @200

Posted on 2019-07-09, 14:42

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd like to try my 5x86 run at 200 Mhz on a VLB motherboard (Shuttle HOT-419). It is stable both at 160 (4x40) and 150 (3x50). Now, I have set everything to fail-safe in BIOS but it doesn't even boot at 4x50. The CPU voltage is still at default 3.45V. Can I safely go up to 4V? I read somewhere that …

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Re: Chips & Technologies F64300 VLB vga question

Posted on 2019-07-09, 12:24

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can safely assume its marketing wank, PC Mag 6 Dec 1994 description sounds like some kind of deeper fifo to hide rasterization delays from host (outputting framebuffer to screen blocks main host from writing to video memory). You would have to find actual alleged patent application to know more …

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Re: 486 motherboard won't boot, jumper settings?

Posted on 2019-07-09, 07:32

by

by stalk3r

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just to make things clear, the motherboard came with NO jumpers installed at all. Zero. So, I need to know where everything goes, not just CPU, FSB, cache, etc. I see that the Stason website has most of those listed... will try my luck tomorrow. EDIT: after inspecting the board again, I found what …

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