VOGONS


Reply 20960 of 22090, by Deunan

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Terminator packs come in 2 flavours: passive (just resistors inside) and active (bit more complicated so involves an IC or two). In theory it's possible to make a passive terminator yourself, but that will be a bunch of resistors and preferably on some PCB - so that will be either expensive for custom PCB or pretty big for universal PCB. I figure it's not worth my time and effort, but I haven't checked the prices lately so, who knows. If you do make one, don't pick too small SMD resistors, pay attention to the power dissipation rating.

Reply 20961 of 22090, by GigAHerZ

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At last, i received some crystal oscillators i had ordered, and did my first 386DX overclocking: Re: Post your 386 Speedsys results here

"640K ought to be enough for anybody." - And i intend to get every last bit out of it even after loading every damn driver!

Reply 20962 of 22090, by seleryba

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Today I've soldered the mt32-pi midi HAT board for the Raspberry Pi. Tomorrow I'll play a lot of MIDIs on that.

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Reply 20963 of 22090, by dormcat

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RaiderOfLostVoodoo wrote on 2022-02-19, 12:34:
Boards that can run EDO can usually run FPM as well. […]
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Boards that can run EDO can usually run FPM as well.

It's always a good idea to check all your RAM modules.
Don't forget to take a photo of successful Memtest, in case you want to sell.
I have photos of all my sticks, even the ones I intend to keep.

To be more exact: I don't have any motherboard with 30-pin (FPM) or laptop with 144-pin (SO-DIMM SDR SDRAM) now. The only 30-pin socket I own is on the sound font expansion of SB AWE32.
I do have a single strip of 4MB 72-pin FPM SIMM (70ns) but I can't install on a Pentium-class MB as they require SIMM in pairs, and I don't have (nor I plan to acquire) a 486 MB with 72-pin SIMM socket just to test this RAM.

Kinda regret recycling a 486 MB (had power-up issues and didn't know how to convert ATX to AT; my remaining 30-pin SIMM were taken down from it) and a Win9x laptop; didn't have enough time and knowledge back then.

Last edited by dormcat on 2022-02-21, 01:27. Edited 1 time in total.

Reply 20964 of 22090, by PD2JK

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You could buy a 72p RAM expansion board for AWE64. Then you can test single modules.
No guarantees above 28 Megs. 😁

Philips P3238: Siemens 80286-12 / Highscreen AT: Pentium MMX 200@233MHz / Highscreen ATX: Athlon Classic 1 GHz

Reply 20965 of 22090, by stef80

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Refurbished another FX5900 XT 😀

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Reply 20966 of 22090, by stamasd

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Recapping a socket 939 board.

IMG-20220220-093642.jpg

IMG-20220220-150142.jpg

Silly cap, you're supposed to be 3300uF, why'd you have to burst like that?

IMG-20220220-152206.jpg

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 20967 of 22090, by fosterwj03

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I wrapped up my experiments with OS/2 version 2.0 with Service Pack 2 (Fixpak?) on my Pentium 4 overkill retro box. I was surprised to learn that the OS/2 multimedia pack that shipped with OS/2 2.1 will install and function on version 2.o (at least with the Service Pack). I couldn't find much documentation online that it was even possible other than references to an IBM multimedia computer that shipped around the same time. Even better, the improved Sound Blaster 16 driver from Creative Labs works perfectly including the "external MIDI" from the attached Dreamblaster S2.

The only problem I encounter was that I couldn't get sound FX working properly in either DOS or WIN-OS2 (version 3.0a). I could get a Windows CD player to work with analog stereo sound, but I couldn't find a Win 3.0 sound driver that would properly detect the Sound Blaster 16 in Windows (it complained at the DMA detection stage).

Creative Labs "DIAGNOSE.EXE" program properly detected the Sound Blaster 16 in a DOS box and even played the test 8-bit and 16-bit sounds as well as ADLIB music. Unfortunately, every game I tried either crashed the DOS box or crashed the system if I tried to play with sound FX. General MIDI through the Dreamblaster S2 did work in most games I tried in a DOS box.

For good measure, I also installed networking with TCPIP. I could basically only run Ping and FTP, but it still provided some internet capability.

I wish I knew how to screen capture in OS/2 on real hardware. The only screen capture utility I could find for OS/2 version 2.x captures text boxes, not the desktop. I'd love to show off OS/2 in all of its 1280x1024, 256-color glory (using an ATI Mach32 graphics card).

Reply 20968 of 22090, by BitWrangler

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Even late in the life of OS/2 I think programmers would have thought storage performance so low in comparison to data capture required, that it would be pointless, even at 5 frames a second. Any real time compression would be out also, didn't have the Mhz for that either.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 20970 of 22090, by stamasd

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The ones I'm getting are rated for ESR of 0.015 ohms, should be good enough.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 20971 of 22090, by stamasd

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stamasd wrote on 2022-02-20, 21:25:
Recapping a socket 939 board. […]
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Recapping a socket 939 board.

IMG-20220220-093642.jpg

IMG-20220220-150142.jpg

Silly cap, you're supposed to be 3300uF, why'd you have to burst like that?

IMG-20220220-152206.jpg

Okay after recapping the motherboard, it works... sort of. I mean it works, POSTs and boots consistently, I can get into the BIOS without it freezing etc.

But it takes a very long time to POST. Like, 5 minutes long between printing the CPU ID and the moment when it starts counting memory. After it starts counting the memory, all is fine and proceeds at the normal speed.
And it does this delayed POST very consistently, every single time. I've never seen a motherboard do that.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 20972 of 22090, by Nexxen

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stamasd wrote on 2022-02-22, 00:15:
Okay after recapping the motherboard, it works... sort of. I mean it works, POSTs and boots consistently, I can get into the BIO […]
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stamasd wrote on 2022-02-20, 21:25:
Recapping a socket 939 board. […]
Show full quote

Recapping a socket 939 board.

IMG-20220220-093642.jpg

IMG-20220220-150142.jpg

Silly cap, you're supposed to be 3300uF, why'd you have to burst like that?

IMG-20220220-152206.jpg

Okay after recapping the motherboard, it works... sort of. I mean it works, POSTs and boots consistently, I can get into the BIOS without it freezing etc.

But it takes a very long time to POST. Like, 5 minutes long between printing the CPU ID and the moment when it starts counting memory. After it starts counting the memory, all is fine and proceeds at the normal speed.
And it does this delayed POST very consistently, every single time. I've never seen a motherboard do that.

What happens if you press reset?
Cold boot, hot boot; resets? I guess you tried all already.

PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K

Reply 20973 of 22090, by stamasd

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Reset gives cold boot. But even a warm boot (ctrl-alt-del after boot) results in the same long delay during POST. Just without memory count at the end of the delay.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 20974 of 22090, by Kahenraz

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I have a motherboard that I recapped which doesn't shutdown or reboot properly from Windows 98/ME. Shutdown will usually work but reboot will always hang the system on a black screen with a blinking cursor, requiring a hard reset. Either option will always trigger the startup scandisk which detects an incorrect shutdown (even though normal shutdown turns the computer off completely).

I only noticed this problem after I replaced the stock capacitors. I used genuine Nichicon capacitors ordered from Digi-Key. I don't know if the issue existed prior to replacing the capacitors since I hadn't done this exact test.

I have suspected that the capacitors I used as replacements are not low ESR, which is why I offered the warning. The ones I used are Nichcon HV(M) series which are marketed as low impedance. I'm not even sure if this has anything to do with the problem I'm experiencing, as I only have the one board.

Reply 20975 of 22090, by stamasd

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Well I've cleared the CMOS a few times, didn't help. Flashed the latest BIOS version 1.D from the original 1.A and it also didn't help.
I noticed that during the time it waits during POST, if I press the NumLock key, all 3 LEDs on the keyboard flash, then go blank. Do this 5-6 times in a row, and eventually it continues to POST. So it shortens the duration of the wait during POST. Weird.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 20977 of 22090, by stamasd

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I guess I'll go ahead and install XP and see if it's stable. 😀

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 20978 of 22090, by ODwilly

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Kahenraz wrote on 2022-02-22, 01:10:

I have a motherboard that I recapped which doesn't shutdown or reboot properly from Windows 98/ME. Shutdown will usually work but reboot will always hang the system on a black screen with a blinking cursor, requiring a hard reset. Either option will always trigger the startup scandisk which detects an incorrect shutdown (even though normal shutdown turns the computer off completely).

I only noticed this problem after I replaced the stock capacitors. I used genuine Nichicon capacitors ordered from Digi-Key. I don't know if the issue existed prior to replacing the capacitors since I hadn't done this exact test.

I have suspected that the capacitors I used as replacements are not low ESR, which is why I offered the warning. The ones I used are Nichcon HV(M) series which are marketed as low impedance. I'm not even sure if this has anything to do with the problem I'm experiencing, as I only have the one board.

The last time I put my Soyo P4 board through it's paces was after the VRM recap, since then Iv done the rest of the primaries and big-medium secondary caps and the power switch wouldn't power it off, but the reset switch worked perfectly. However if I tried to put it to sleep it would soft crash XP

Main pc: Asus ROG laptop. I7-6700HQ, GTX 960M 4gb, 16gb DDR4.
Retro PC: Soyo P4S Dragon, 3gb ddr 266, 120gb Maxtor, Geforce Fx 5950 Ultra, SB Live! 5.1

Reply 20979 of 22090, by TheAbandonwareGuy

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Anybody familiar with a DEC Dazzle Multimedia Rev 3 PCI card? I got this thing in a lot and I can find precisely fuck all about it. Apparently it was made in 1997 with a Digital Multimedia 21230 at its core from 1995 (https://techmonitor.ai/techonology/dec_chip_h … desktop_editing) with what appears to be 1MB of Alliance memory on the back end. Just a fancy MPEG1 card I'm guessing? Any practical usage?

Also acquired a Rage 128 AiW, a Matrox G2+ with memory expansion module, and a SB Live 5.1 in the same lot. Not bad for something I received for free.

Last edited by Stiletto on 2022-02-23, 05:55. Edited 1 time in total.

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