Announcement

Collapse

Forum etiquette

Our mission ...

This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

This forum has been around in this format for over 15 years. These rules and guidelines help us maintain a healthy and active community, and we moderate the forum to keep things on track. Please familiarize yourself with these rules and guidelines.


Remain civil and respectful

There are several hundred people who actively participate here. People come from all different backgrounds and will have different ways of seeing things. You will not agree with everything you read here. Back-and-forth discussions are fine but do not cross the line into rude or disrespectful behavior.

Conduct yourself as you would at any other place where people come together in person to discuss their hobby. If you wouldn't say something to somebody in person, then you probably should not be writing it here.

This should be obvious but, just in case: profanity, threats, slurs against any group (sexual, racial, gender, etc.) will not be tolerated.


Stay close to the original topic being discussed
  • If you are starting a new thread choose a reasonable sub-forum to start your thread. (If you choose incorrectly don't worry, we can fix that.)
  • If you are responding to a thread, stay on topic - the original poster was trying to achieve something. You can always start a new thread instead of potentially "hijacking" an existing thread.



Contribute something meaningful

To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
  • This is not a chat room. If you are taking less than 30 seconds to make a post then you are probably doing something wrong. A post should be on topic, clear, and contribute something meaningful to the discussion. If people read your posts and feel that their time as been wasted, they will stop reading your posts. Worse yet, they will stop visiting and we'll lose their experience and contributions.
  • Do not bump threads.
  • Do not "necro-post" unless you are following up to a specific person on a specific thread. And even then, that person may have moved on. Just start a new thread for your related topic.
  • Use the Private Message system for posts that are targeted at a specific person.


"PM Sent!" messages (or, how to use the Private Message system)

This forum has a private message feature that we want people to use for messages that are not of general interest to other members.

In short, if you are going to reply to a thread and that reply is targeted to a specific individual and not of interest to anybody else (either now or in the future) then send a private message instead.

Here are some obvious examples of when you should not reply to a thread and use the PM system instead:
  • "PM Sent!": Do not tell the rest of us that you sent a PM ... the forum software will tell the other person that they have a PM waiting.
  • "How much is shipping to ....": This is a very specific and directed question that is not of interest to anybody else.


Why do we have this policy? Sending a "PM Sent!" type message basically wastes everybody else's time by making them having to scroll past a post in a thread that looks to be updated, when the update is not meaningful. And the person you are sending the PM to will be notified by the forum software that they have a message waiting for them. Look up at the top near the right edge where it says 'Notifications' ... if you have a PM waiting, it will tell you there.

Copyright and other legal issues

We are here to discuss vintage computing, so discussing software, books, and other intellectual property that is on-topic is fine. We don't want people using these forums to discuss or enable copyright violations or other things that are against the law; whether you agree with the law or not is irrelevant. Do not use our resources for something that is legally or morally questionable.

Our discussions here generally fall under "fair use." Telling people how to pirate a software title is an example of something that is not allowable here.


Reporting problematic posts

If you see spam, a wildly off-topic post, or something abusive or illegal please report the thread by clicking on the "Report Post" icon. (It looks like an exclamation point in a triangle and it is available under every post.) This send a notification to all of the moderators, so somebody will see it and deal with it.

If you are unsure you may consider sending a private message to a moderator instead.


New user moderation

New users are directly moderated so that we can weed spammers out early. This means that for your first 10 posts you will have some delay before they are seen. We understand this can be disruptive to the flow of conversation and we try to keep up with our new user moderation duties to avoid undue inconvenience. Please do not make duplicate posts, extra posts to bump your post count, or ask the moderators to expedite this process; 10 moderated posts will go by quickly.

New users also have a smaller personal message inbox limit and are rate limited when sending PMs to other users.


Other suggestions
  • Use Google, books, or other definitive sources. There is a lot of information out there.
  • Don't make people guess at what you are trying to say; we are not mind readers. Be clear and concise.
  • Spelling and grammar are not rated, but they do make a post easier to read.
See more
See less

MediaVision Pro Graphics 1280p

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    MediaVision Pro Graphics 1280p

    Sigh, what a journey it has been trying to find the proper Windows 3.1x drivers for this card so I can run it in my 486 DX4. So I got this card out of an old 486 DX2-66 that was used for Computer Aided Design back in the 90's that was in the skip where I used to work a few years ago. It's a 4MB VLB Graphics Card with a Cirrus Logic CL GD-1501 chip on it, and a TI chip of some sort that goes up to 1280X1024 screen resolution.

    I've hunted high and low for the drivers for almost 3 years now, using Google, Yahoo, Webcrawler, Metacrawler, spending hours in the archives at cd.textfiles.com, all looking for two files....1280win.exe, and 1280util.exe, which are supposed to make the 2 disk set with the drivers and the utilities for the card on it. Every site that says they have them (windrivers.com, ftp.pipeline.com.au, and a hand full of other places) almost always have broken links or a broken website that does not work.

    So I'm wondering if anyone here happens to have the disks or know of a place where I can find the disk images of this card. I'd hate to give up on it as it's a pretty nice graphics card for it's time. Media vision is out of business, their FTP is long gone, and I've gone so far as to look for it's smaller sister card's drivers to use - the 1024 model, and even that is like finding a needle in a haysta

    so my question is
    Does anyone have the disks, images of the disks, or the files? Or know where I can get em'? Or does anyone know if using the Cirrus Logic drivers or TI drivers would work? And which chip would be the chip to use them?

    #2
    Are you sure it's a "1501" -- that's not a CL-GD number I've ever seen. Pretty much all Cirrus Logic video chips are 54xx.
    http://en.wikipedia.org/wiki/Cirrus_...phics_chipsets

    Maybe if you posted up a hi-res pic we could help you ID it better... Trying to find a copy of cirrus' vlchip.zip for you, since that would ID the card properly... I would GUESS at it being a 5426 or higher 542x...
    From time to time the accessibility of a website must be refreshed with the blood of owners and designers. It is its natural manure.
    CUTCODEDOWN.COM

    Comment


      #3
      I had one a long time ago, so my memory might not be the best...
      I think the cirrus logic chip is a red herring. The board used it for vga compatibility only. For the high-res and accelerated modes, you need the driver for its own video chip.

      Comment


        #4
        Yep, the Cirrus chip is only to provide basic (and apparently quite slow) VGA compatibility in DOS. Windows uses the accelerated chip, which is apparently some sort of Mediavision proprietary thing called the MV451... it could be a re-brand of something else, but information about it is pretty scarce so it's hard to say for sure. The TI chip is probably the DAC.

        Comment


          #5
          Sorry for bumping an old thread, but could you please post a picture of your ProGraphics 1280?
          Apparently there are no pictures on the net, and I'd eagerly have a look - would be cool to compare it with the 1024 version (that was designed by the 3dfx team before they left Media Vision).

          Comment


            #6
            Here are some marketing flyers I kept for the 1280. It was originally designed to be the graphics chip companion to our 386/RISC workstation hybrid. Really just a dumb frame buffer with a few latches/shifters to aid in fills and moves. The ProGraphics 1024 was architected (by yours truly) to be a Windows accelerator before I left for NVIDIA. Unfortunately I don't have any of the drivers for the 1280 - that was contracted out to a third party for development.

            Pellucid.jpgPellucid 1.jpg
            Pellucid 2.jpgPellucid 3.jpg
            Pellucid 4.jpgPellucid 5.jpg
            Last edited by resman; December 3, 2016, 06:45 PM.

            Comment


              #7
              Originally posted by resman View Post
              The ProGraphics 1024 was architected (by yours truly) to be a Windows accelerator before I left for NVIDIA.
              So did that fabled genlock addon for the PG1024 ever existed, even in proto form?

              Comment


                #8
                Wow! Thanks for the info!
                Could you please shed some more light upon both the PG1024 and PG1280? Did the 3dfx team participate in PG1280 as well? If I understand you correctly, PG1280 is inferior to the PG1024, isn't it? Do you happen to have any software for PG1024? Any other info would be more than appreciated!

                Comment


                  #9
                  Originally posted by dorkbert View Post
                  So did that fabled genlock addon for the PG1024 ever existed, even in proto form?
                  Never heard of it. But then I left just as silicon came back and before the MediaVision marketing machine got ahold of it (thankfully). I'm sure they had all sorts of follow-on products, but any genlock capability would have required a bit of external hardware.

                  Comment


                    #10
                    Originally posted by resman View Post
                    Never heard of it. But then I left just as silicon came back and before the MediaVision marketing machine got ahold of it (thankfully). I'm sure they had all sorts of follow-on products, but any genlock capability would have required a bit of external hardware.
                    I figure there was probably something on the drawing board since all the PG1024 boards sold were populated with composite and svideo in/out connectors, so it was probably more than just some marketing department wet dream.

                    Comment


                      #11
                      Originally posted by dorkbert View Post
                      I figure there was probably something on the drawing board since all the PG1024 boards sold were populated with composite and svideo in/out connectors, so it was probably more than just some marketing department wet dream.
                      Hmmm. Mine wasn't - VGA out only. Maybe it was a decision made later in production.

                      Comment


                        #12
                        got pics?

                        Comment


                          #13
                          ISA PG1024. Unfortunately it didn't work the last time I tried it a few years ago. Bit rot, I suppose.
                          IMG_2449.jpg

                          Bonus question. Name this card:

                          IMG_2448.jpg

                          Comment


                            #14
                            Originally posted by hard1k View Post
                            Wow! Thanks for the info!
                            Could you please shed some more light upon both the PG1024 and PG1280? Did the 3dfx team participate in PG1280 as well? If I understand you correctly, PG1280 is inferior to the PG1024, isn't it? Do you happen to have any software for PG1024? Any other info would be more than appreciated!
                            Pellucid was a combination of engineers from Silicon Graphics and Compaq - we met from the failed ACE consortium project. We started out designing a MIPS based NT workstation and selling the remaining stock of SGI IrisVision boards. Our workstation needed a better graphics option to compete with the workstations of the day - VLB was just coming to market and the PC solutions were a little underwhelming. So we put together a simple frame buffer controller that connected directly to the MIPS bus.

                            When it became clear we weren't going to have a viable market for MIPS NT workstations, we spun a VLB board incorporating the frame buffer controller to court our suitor - MediaVision. There is a sordid story involving the Indian Mafia somewhere in there. So the ProGraphics 1280 was born (it could do 1280x1024 or 1024x768 ). It has some latches and shifters to accelerate fills and screen-to-screen moves. I had spec-ed out the functionality one weekend but forgot to take in to account the differences in the 1024x768 configuration so the screen-to-screen moves had to be done completely with the CPU in that resolution. Sloooowww.

                            Anyway, MediaVision wanted the fastest Windows accelerator from us so we immediately started work on it. We didn't have a Windows driver for the PG1280 so we contracted that out. It wasn't going to be a fast accelerator anyway, so there wasn't much point spending much effort on it. The PG1024 was designed to accelerate the windows GDI driver interface without compromise. I wrote the display driver from scratch, but since I didn't have hardware yet, I used our IrisVision product as the development platform with some firmware additions to make it a viable Windows platform. It was slow, but allowed me to get the driver hashed out and the interface for the PG1024 solidified. Some cool features of the PG1024: it didn't have a CPU accessible frame buffer. This allows the hardware designer (Sellers) to optimize the backend memory interface without regard to CPU interaction. The register set was designed so that there wasn't a penalty for 24 bpp over 16 bpp, and equivalent to 8 bpp in most cases - even over ISA. RGB data was transmitted as 16 bits of blue and green data, with the red data in the address bits (an array of 256, 16 bit values). That reduced the data traffic by 1/3 on the ISA bus. The VLB/PCI version didn't require such shenanigans, so you could just send over raw RGB data. There was also a front end CLUT so 1, 4 and 8 bpp packed data could be sent over the bus and expanded in hardware to the 16 or 24 bpp frame buffer. Most image data back then was 1, 4, or 8 bpp so this helped a lot. The hardware did all the alignment so the driver just had to set the destination registers and shove data to the chip as fast as it could. And that sucker was fast.

                            But it quickly became clear the MediaVision was involved in some underhanded activities so I made the decision to leave for NVIDIA, taking most of the Compaq team with me and the SGI engineers started 3dfx. That left the PG1024 somewhat untuned but it still managed to be the fastest Windows accelerator for something like 3 weeks. Such was the heyday of 2D accelerators.

                            I think I still have some intermediate version of the GDI driver somewhere, and the retail floppy disk that came in the box.

                            Comment


                              #15
                              cool back story! I wasn't expecting to see PG1024 in ISA only; all the ones I've came across were VLB boards. Didnt know there was provision for PCI front end either. Nice to hear about this. Not sure how the video works out without CPU access to the frame buffer. Would be interesting to see the hardware architecture doc on the chip. Pity I chuck the board some years back; one day it just stopped working out of the blue.

                              Comment

                              Working...
                              X