What's a V-size adjustment? EDIT: Another unrelated question here; can SVGA support custom resolutions? V-size adjustment means just that: a knob on the CRT that adjusts the vertical size of the picture, stretching/compressing it. It's a common enough control on the front panel of most SVGA …

Except for the refresh rate of 60Hz. It causes noticable flicker on a lot of VGA (or Super-VGA) CRT monitors. Yeah, I was shocked recently at how awful Windows 3.1 looked at 640x480x16 @ 60Hz on my Trinitron CRT. It was a hideous flickering mess! Much worse than what I remembered. I made haste to …

SodaSuccubus wrote on 2020-09-27, 22:30: That Is a suprisingly clean and modern look for a board made in the 80s. Well done to the folks in the factory that day! Great find 😀 If you look carefully you can see the blown tantalum on the +12V rail [that miraculously didn't short], which is the reason …

Wow, is that motherboard white ? Can you post a good picture of the motherboard ? Also: if you did not format that MFM drive with that controller you could have odd issues if formatted with a different but same make/model controller... just a thought. MFM drive had a fresh low-level format, and as …

Honestly would just try a different/newer MFM controller. Most problems I have run into with MFM tech is a failing cable or controller. Those full metal jacket Seagate MFM drives usually hold up pretty well in my experience. I mean, yeah, I have to tag some bad sectors, but overall they just keep …

ISA Bus overclock most likely? I measured the DMA controller's clock, it's 4Mhz when in turbo mode (and 4.77Mhz in normal mode) so seems within spec. I guess it's time to start writing a minimal test program that can reproduce the corruption, and then trace through its execution to find out exactly …

Today I've been attempting to diagnose why my recent Turbo XT acquisition keeps corrupting the HDD when it's in turbo mode... even though the machine has managed to pass multiple different diagnostic tools' testing with flying colours and zero errors. Investigations are ongoing!

Cyberdyne wrote on 2020-09-23, 12:51: CN10 and CN9 are winchester data connectors CN9/CN10 are the RS232 serial port headers.

but no FLOPPY if i understand it correctly? Floppy connector is the 34-pin header at the extreme end of the card. My card also has an empty spot for the second UART chip. I'm excited to try the CGA emulation (using the jumpers to 'force' that mode) and see how it looks on my MDA monitors. And check …

Unfortunately not. You mentioned that you found one in a PC? Did it have a hard drive? If so, it might be on there? Sadly the HDD (a Fuji FK309-26 MFM drive hooked up to an Adaptec RLL controller) doesn't spin up when power is applied, so it's going into the "maybe fix it later" bin for now. I …

Just a follow up - I managed to track down the manual for this card. Attached to this post Thanks for posting the manual for this card! I just found one of these in a recently-acquired "Logi 88-XT". Did you ever find the driver diskette for this card? I'm interested in the ability to switch between …

As a strong supporter of rendering engine diversity, I continue to browse using Firefox. But what I really want to know: which browser do you use on your 486? My attempts to browse the web using Windows 3.1 have been quite a disappointment. MSIE 3.0 actually manages to render a few sites. Netscape …

Aublak wrote on 2020-09-20, 13:24: Very nice. That has a great looking image. The overscanning nicely hides the vertical keystone issues. 😀 One day I'll crack open the housing and fiddle with the internal adjustments...

My greatest "dumpster find" of all time must be this Trinitron CRT... it was buried in a pile of discarded CRTs that had been left outside in the rain for an unknown length of time. I brought it home and left it indoors to dry out. For a year. And finally worked up the courage last month to apply …

Long-time VOGONS lurker here... It's thanks to the crazy-spending collectors that I can afford to have nice retro gear. I can buy a pile of untested scrap, safe in the knowledge that parting out half of it will pay for the other half that I want to keep. Some folks in our hobby don't have the time …