Re: Bought these (retro) hardware today
Posted on 2020-06-16, 20:08
🤣, this is wonderful hahaha
Re: GBS8200 Video Converter for CGA/EGA on VGA monitor
Posted on 2020-06-16, 15:28
This thing needs custom firmware to be more useful. In default it deinterlaces its inputs and shows variety of artifacts due to it...
Re: Odd behavior with my Mitsubishi Diamond Pro 2060u CRT
Posted on 2020-06-13, 11:28
Does the geometry also change with this ? I.e image expands with the brightness decrease ? There's a good chance it is caused by HV drop, and it can inidcate weak flyback transformer as I doubt it was like it when new... Replacing few capacitors on the main power rails can also help a little bit …
Re: Overheating EMU8K on AWE32 CT2760
Posted on 2020-06-11, 21:57
The part that goes in the pads of the chip has a few that look like they got severed or perhaps (almost) touching the neighboring pads with the displaced solder.
Re: Overheating EMU8K on AWE32 CT2760
Posted on 2020-06-11, 14:50
That does look like some tracks might be severed or almost so. It certainly is fixable with a bit of effort. Scape off some more of the soldermask and with luck solder can bridge the abrasion over and you won't need to add wire patches over the damaged parts. You'll definitely want to resolder some …
Re: Overheating EMU8K on AWE32 CT2760
Posted on 2020-06-11, 10:32
There are three versions of the CT1971 (EMU8000) chip : one without ICxxx marking, IC405A and IC405B. The IC405A version gets very hot (when made by manufacturer named TSMC) while B versions I know of do not. I'm not sure if verison without ICxxx marking (those are made by OKI) is hot or not, but it …
Re: Beyond a replica - the Covox Blaster
Posted on 2020-06-08, 10:23
I didn't know there was that big of a price difference, but I haven't actually looked at non-surface mounted stuff expect for high power handling reasons and not for anything needing precision performance 🤣. (I get majority of my stuff from Mouser too, DDP is great !)
Re: Beyond a replica - the Covox Blaster
Posted on 2020-06-08, 09:27
You could save substantial space by usng 1/8W or even 1/16W resistors, they will be a lot smaller while not being any more difficult to solder compared to the bigger ones you use right now. I like the idea of being able to plug straight into the LPT header ~
Re: 16bit ISA connector ?
Posted on 2020-06-05, 06:09
It does seem only connector is missing and not all the other required passives. Seek "2.54mm card edge connector" on ebay, there will be ISA compatible connectors in the results.
Re: ISAPC-00 ISA-to-PCMCIA card
Posted on 2020-06-05, 05:19
This particular adapter is PCMCIA and not Cardbus, majority of those devices are Cardbus and aren't gonna work (or even fit) in the ISA to PCMCIA things.
Re: Newly made ISA CL-GD5434
Posted on 2020-06-02, 10:04
Also I don't understand why RGB traces are so thick on most early SVGA boards, since they should have 75 Omh impedance, i.e. very thin. I imagine the main concern is minimising inductance and with it picking up of noise etc. Impedance control probably wasn't a huge priority and nobody probably even …
Re: Geforce 4 ti4600 with missing crystal oscillator
Posted on 2020-06-02, 01:10
Very nice ~
Re: Geforce 4 ti4600 with missing quartz
Posted on 2020-06-01, 12:37
The capacitors are on the back, C211 and C212 on the card that misses a crystal. On the donor they seem to be the small ones between crystal and e-caps. The frequency will be very minutely wrong (probably unlikely to affect operation) with the wrong caps.
Re: Geforce 4 ti4600 with missing quartz
Posted on 2020-06-01, 12:25
It'll probably be a 27MHz one and any you can find will most probably work just fine. There's no polarity on them. Ideally you also transplant the two little ceramics capacitors connecting to the two ends of the crystal since they are specfic to a particular crystal. Test can be done just with …
Re: Driver for MediaMagic Telemetry-32 OPTi 82C950
Posted on 2020-06-01, 09:45
I imagine that shouldn't make a difference, both should behave in same way but you'll never know. Win 3.x and 95 are probably what the card is supposed to definitely run under.
Re: Driver for MediaMagic Telemetry-32 OPTi 82C950
Posted on 2020-06-01, 01:35
There is a "softsynth" on the card, running off the AT&T DSP chip, the big chips with odd and even are indeed the data ROMs for the DSP, probably containing both program code and samples.
Re: 70Hz in pure DOS at 1600x1200 (or other) over DVI on an old card (FX5900) with modern monitor is possible
Posted on 2020-05-31, 11:04
BIOS does matter, the X550 (I remembered it being X600...) card in my ISA C2D machine has very few resolutions in its VESA modes list and in DOS it only ever will use those for any attached monitor. On that particar card there's no 1600x1200, only 1280x1024 at max. In windows things get "fixed" by …
Re: 70Hz in pure DOS at 1600x1200 (or other) over DVI on an old card (FX5900) with modern monitor is possible
Posted on 2020-05-31, 09:52
It happened on Radeon 9600XT, X300, X600, X700, X850, and probably on 9200 and 7000 also.
Re: 70Hz in pure DOS at 1600x1200 (or other) over DVI on an old card (FX5900) with modern monitor is possible
Posted on 2020-05-31, 06:39
I noticed it when I was having two monitors and there were no scanlines on the CRT I was using. Lo and behold the card scaled the image to whatever monitor told it to (1280x1024). When I swapped the cables things were correct, nothing was scaled to the CRT and other monitor on DVI was working right …
Re: 70Hz in pure DOS at 1600x1200 (or other) over DVI on an old card (FX5900) with modern monitor is possible
Posted on 2020-05-31, 05:27
On some of my Radeon cards I can avoid scaling to 1280x1024 by using the other video output, it is like only one output scales to whatever EDID says and other outputs "standard" timings and lets monitor do its thing (this is with VGA signal and not DVI).
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