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Re: What retro activity did you get up to today?

Posted on 2023-09-22, 20:00

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got myself my first UV lamp for erasing EPROMs. It's a 253,7nm wavelength UV lamp (everything under 400nm is good, lower is more effective) meant for sterilizing items. Works really quick - in less than 5min chips are empty. I can definitely recommend it. I got a 8W variant from AliExpress. I'm not …

Re: I recently found this hardware, AKA the Dumpster find thread.

Posted on 2023-09-22, 07:37

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Conner CP3000 40MB HDD and Panasonic JU-475-4 FDD, after some contacts cleaning and pin repair both work fine, even some old data and games on HDD. conner.jpg Damn! I had Conner 40MB HDD on my first PC. But it had brown/bronze sticker instead of green/silver. (Can't tell much more, i was just 7 …

Re: What retro activity did you get up to today?

Posted on 2023-09-14, 14:49

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

BitWrangler wrote on 2023-09-14, 14:37: Cover that, you'll give yourself cataracts, or sunburned eyeball or something. Yes, that's the next plan. I keep myself away from looking at it and i plan to have a half circle metal plate over it to make it contained.

Re: What retro activity did you get up to today?

Posted on 2023-09-14, 14:13

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got myself my first UV lamp for erasing EPROMs. It's a 253,7nm wavelength UV lamp (everything under 400nm is good, lower is more effective) meant for sterilizing items. Works really quick - in less than 5min chips are empty. I can definitely recommend it. I got a 8W variant from AliExpress. I'm not …

Re: Gotek 1.4m vs 720k drives - hardware difference? just firmware?

Posted on 2023-09-01, 18:19

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm using FlashFloppy firmware on my standard 1.44 goteks. At least with FlashFloppy, it's purely software that controls what drive it looks like.

Re: QDI V4S471/G locks up with 1024kB of cache [Fixed! Nicer Award BIOS available!]

Posted on 2023-08-23, 16:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Only thing i can say to you then is congratulations! 😀 I should take a closer look at my PSU, too, and recap the whole board. Maybe i can also get some speed out of my 486 beauty.

Re: QDI V4S471/G locks up with 1024kB of cache [Fixed! Nicer Award BIOS available!]

Posted on 2023-08-21, 09:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

dj_pirtu wrote on 2023-08-21, 07:51: [...] and now that QDI takes 50MHz bus speed fully stable (Am5x86 is 3x50) with memory set to 'fastest' in bios! Test it with Doom benchmark. For me, every diagnostic tool was happy, but with doom, i found my 32MB 60ns sticks to be unstable with "fastest" option …

Re: Bought these (retro) hardware today

Posted on 2023-08-20, 19:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Only real issue so far is the 512MB limit on up to 386 PCs. If there's a MR BIOS for your 386, then this (504MB) limit is not the case. ;) (XT-IDE, EzDrive, OnTrack can help with existing bioses) I have M321 board with MR BIOS and it works great with 4GB CF card. (Because i use FAT16, it has …

Re: What retro activity did you get up to today?

Posted on 2023-08-14, 10:36

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Finally have a fresh "512MB Diagnostics CF card" made. Decided to go for FreeDOS 1.3 with few XMS memory managers even for 286. Also contains bunch of diagnostics and benchmark utilities, and games. And on top of it, bunch of NIC packet drivers and MTCP + intersrv to facilitate any kind of …

Re: DIY 10ns/12ns PDIP 28/32 SRAM async caches

Posted on 2023-08-11, 09:37

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Now, that is cool!

Re: What retro activity did you get up to today?

Posted on 2023-08-08, 19:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

First time converted 4x1MB 30pin SIMMs into SIPPs. I have this beautiful 286 board: https://theretroweb.com/motherboards/s/cdtek-286-turbo And it requires either chips or SIPPs. It did have 1MB in chips. But now, it is upgraded into 4MB. Crazy amount for 286! I also have 287 @ 6MHz with it. There's …

Re: What retro activity did you get up to today?

Posted on 2023-08-06, 14:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

First time converted 4x1MB 30pin SIMMs into SIPPs. I have this beautiful 286 board: https://theretroweb.com/motherboards/s/cdtek-286-turbo And it requires either chips or SIPPs. It did have 1MB in chips. But now, it is upgraded into 4MB. Crazy amount for 286! I also have 287 @ 6MHz with it. There's …

Re: What retro activity did you get up to today?

Posted on 2023-08-04, 09:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Veeb0rg wrote on 2023-08-04, 06:47: I'm trying to organize a bit better. How do you guys store your motherboards and cards? Just antistatic bags or boxes or ?? That's a solution i worked out for myself a bit ago. It's the most compact way that i could reasonably identify a card (ports are visible) …

Re: What retro activity did you get up to today?

Posted on 2023-08-03, 18:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

First time converted 4x1MB 30pin SIMMs into SIPPs. I have this beautiful 286 board: https://theretroweb.com/motherboards/s/cdtek-286-turbo And it requires either chips or SIPPs. It did have 1MB in chips. But now, it is upgraded into 4MB. Crazy amount for 286! I also have 287 @ 6MHz with it. There's …

Re: What retro activity did you get up to today?

Posted on 2023-07-13, 11:53

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Siran wrote on 2023-07-13, 06:30: My 4386-VC-HD board came back[...] Nice machine! Try to get the optional cache socket filled too - it might enable write-back on that cache. I have M321 motherboard, where for writeback, there is a separate (but for mine, different from others) sram chip.

Re: Passive cooling on a Geforce2 GTS?

Posted on 2023-07-13, 11:47

in Marvin \ Video

in Marvin \ Video

Even slightest constant movement of air over the heatsink's fins makes a huge difference. For this card, it really doesn't matter, what fan there is. If the cooling system is active - that's all you need.

Re: QDI V4S471/G locks up with 1024kB of cache [Fixed! Nicer Award BIOS available!]

Posted on 2023-07-07, 10:05

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

dj_pirtu wrote on 2023-07-07, 09:03: Figured it out, POD has it's own WT/WB pin which is out of the 486 pinout. I think it's intentionally shorted to ground in socket. Time to mod the board! 😁

Re: QDI V4S471/G locks up with 1024kB of cache [Fixed! Nicer Award BIOS available!]

Posted on 2023-07-06, 11:16

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Only thing i can suggest is to download datasheet for the chipset and datasheet for the CPU. Figure out, how they should be connected and what connections to "high" or "low" must be made to either CPU or chipset and then in the end search out specific connections on the motherboard and apply that …

Re: QDI V4S471/G locks up with 1024kB of cache [Fixed! Nicer Award BIOS available!]

Posted on 2023-07-04, 18:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some time ago i was debugging this board quite a bit and i mapped out some jumpers on what they actually do. The information is in retroweb: https://theretroweb.com/motherboards/s/qdi-v4s471-g

Re: Bought these (retro) hardware today

Posted on 2023-06-29, 09:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This one… is the fastest “genuine” 486 ever made? No. It's one step before AMD 5x86-133 which is. Cyrix have 586 core in 486 package. AMD doesn't despite the marking 5x86 The AMD 5x86 chips are even still given Am486 model numbers, the 586/5x86 naming is pure marketing. AFAIK, it is not "pure …

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