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3 Weird Video Cards, any idea about what they do?

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    3 Weird Video Cards, any idea about what they do?

    I've had these things for donkey's years and have never been able to tell what exactly they are and their capabilities are.

    1. The first is a VideoLogic MIC 2000:


    I believe this is something to do with video disks, but what it actually does is a mystery.


    2. The second is a complete mystery. "Holland 29/2/88":


    3. I think is some kinda PGC like video card. It must do something special as its a dual card:
    WECD11:

    WECD10:


    I would really like to know what this one does, but any info would be appreciated.
    EISA .cfg Archive | Chip set Encyclopedia

    #2
    Can you read the labels of the larger chips on the Mitsubishi cards? That might confirm what they do. I suspect that the extra card either adds font support or is some form of text overlay system for video.

    I think the Videologic card was used in some early programmable kiosks to play specific videos (from a video disc at first, CD-I later) in response to the user triggering a prompt.

    The Holland card might not be a video card. All those square socketed chips suggest some kind of proprietary communications device. Maybe an ISDN testing card (which would be showing up in Holland in 198. But that is a guess without enough information to support it.

    Comment


      #3
      If you look at the slot cover width on #3 - is it wider than a normal slot cover - as in more like the width of the 5-slot IBM 5150 PC? The styling and such remind me of the inside of the Sperry PC/Leading Edge Model M, both of which are the same thing and were made by Mitsubishi.

      Looks like a CGA video card...but what's up with the connector between the two? I dunno...

      Wesley

      Comment


        #4
        I'm almost positive that the Holland card is a video card of some sort due to the presence of the Brooktree chipset so close to the header.
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        Comment


          #5
          A period Brooktree manual is at http://www.textfiles.com/bitsavers/p...t_Databook.pdf
          Read the part number and see if it is for video or just a Digital/Analog Converter. Unfortunately for my guess, Brooktree didn't produce their T1 chips until 1994.

          Comment


            #6
            Originally posted by krebizfan View Post
            Can you read the labels of the larger chips on the Mitsubishi cards? That might confirm what they do. I suspect that the extra card either adds font support or is some form of text overlay system for video.
            On the first card 3a, the big BIOS? chip reads:
            Mitsubishi Electric (c)1983
            WECD11
            D21 C

            On the second card 3b, the big chip about the size of a keyboard controller reads:
            4L2
            HD46505SP-1
            JAPAN
            HD68A455SP

            Originally posted by krebizfan View Post
            I think the Videologic card was used in some early programmable kiosks to play specific videos (from a video disc at first, CD-I later) in response to the user triggering a prompt.
            Interesting, That little board on the ribbon cable looks like it may connect to an EGA/VGA feature connector. You mentioned text overlay system for the other card and this got me thinking.

            Originally posted by wesleyfurr View Post
            If you look at the slot cover width on #3 - is it wider than a normal slot cover...
            Its XT width, i can see what you mean though, in the picture it looks wider than it is.

            NeXT and krebizfan i will have a look through that manual.

            Thanks everyone.
            Last edited by mR_Slug; August 14, 2015, 10:42 PM.
            EISA .cfg Archive | Chip set Encyclopedia

            Comment


              #7
              I'm almost positive that the Holland card is a video card of some sort due to the presence of the Brooktree chipset so close to the header.
              Looks like an early video digitizer card to me. Certainly not a graphics card.

              The Mitsubishi WECD11 card should be an ordinary CGA card. No idea why it has the chips spread over two cards. Maybe it's switchable between CGA, MDA, and Hercules. There are a couple of green jumpers at the video port. What do they read?
              Last edited by Timo W.; August 15, 2015, 12:19 AM.

              Comment


                #8
                On the Holland:
                Well i couldn't open that PDF but i did find out some info on it. The chip is a BT453KP. Its a 66Mhz RAMDAC. PDF says it can do 259 (yes 259) colors from a pallet of 16.8 million. Outputs RS-343A to RS-170 which i think is NTSC or may be just 0-1V video signal. Also says its Macintosh II compatible.

                The ram chips are NEC D41464v a 65,536 x 4-bit chip, that's a 256kbit chip and there are 40 of them giving 1.25MB ram if I'm not mistaken. So this seems like quite a nice card for 1988.

                Also under those red caps at the end is the word Chameleon. Feel a bit stupid I missed this. Searched Infoworld/PC mag didn't turn up anything.

                I'm kinda surprised there are still datasheets about for this stuff.

                May plug this in and probe the DB9 connector. I think that damaged QFP will hold.


                Originally posted by Timo W. View Post
                Looks like an early video digitizer card to me. Certainly not a graphics card.

                The Mitsubishi WECD11 card should be an ordinary CGA card. No idea why it has the chips spread over two cards. Maybe it's switchable between CGA, MDA, and Hercules. There are a couple of green jumpers at the video port. What do they read?
                Dont read anything just numbers beside them, except for one labeled "P108"

                With it being just CGA. I find it odd that Mitsubishi known for efficient cost reduced designs would build a CGA card that took 2 slots up in 1983. Especially when slots were so valuable in PC's. Does look like a CGA card though. CGA/HGC/MDA or additional font could be either. Does anyone know if the far east had their character sets on PC's in 83-84?

                Thanks.
                EISA .cfg Archive | Chip set Encyclopedia

                Comment


                  #9
                  Originally posted by mR_Slug View Post
                  Its XT width, i can see what you mean though, in the picture it looks wider than it is.
                  The reason I asked...the Model M/Sperry system had slot spacing that was wider like the original PC, and thus would have been a clue that maybe it was meant for that machine. Doesn't sound like that is the case though...

                  Wesley

                  Comment


                    #10
                    Hint: It would be ideal if the photos were high-resolution so we can read the markings on the chips:

                    For #1 we could see if there are any 'key' chips on the board. It seems mostly analog signal handling, the digital part may consist only of latches to switch something on and off. Possibly it can overlay video from the feature connector.

                    On #2 I guessed one of the chips as HD63485. Its datasheet say it's part of the ACRTC (Advanced CRT controller) family. The main chip of this family seems to be HD63484 (is that one on the board?). Its main feature seems it can have four logical areas on the screen. Searching for HD63484 brings this up: http://www.vgamuseum.info/index.php/...-hd63484-acrtc . It

                    #3: How much RAM does it have? If it's more than 16k it might be better than CGA. It appears to have 24 chips of RAM. Plug it in and see if it does something?

                    In Far East they had their own family of computers (IBM PC incompatible), the PC-98. That one of course had Japanese characters which are stored in huge (for the time) ROMs.

                    Comment


                      #11
                      n Far East they had their own family of computers (IBM PC incompatible), the PC-98. That one of course had Japanese characters which are stored in huge (for the time) ROMs.
                      Most PC-98 gear didn't use ISA; mostly S-Bus.

                      Comment


                        #12
                        -> IBM PC incompatible

                        Comment


                          #13
                          Originally posted by H-A-L-9000 View Post
                          Hint: It would be ideal if the photos were high-resolution so we can read the markings on the chips:
                          I will try to get some better pictures. My camera is not too good at closeup so I will have to borrow one.


                          Well tonight I've been focusing on #2, The Holland Chameleon

                          From the manual for the BT453KP, I have learned that this chip is actually 40Mhz. the BT453KP66 is 66Mhz. The 5 signals of interest are:

                          IOR Red out
                          IOG Green out
                          IOB Blue out
                          ISYNC Sync out (usually connected to IOG)
                          GND Ground

                          On this card the ISYNC is connected to IOG giving Sync-On-Green. The pinout is (When looking at the connector of the card):
                          Code:
                          0  0  B GS  R
                           G  G  G  G
                          B blue, GS Green/Sync, R red, G ground, 0 n/c (AFAIK)

                          So what I have done is pull the chip and lift the ISYNC pin up and replaced it. So now I have RGB and Ground on the connector, and composite sync on the pin. Tried to make an adapter to VGA, but I'm not sure it can accept composite sync (Compaq v1100). My 10Mhz scope shows output on RGB and ISYNC, but it needs repairing itself and is a bit erratic. I'm not that well versed in electronics so it tends to be used in a qualitative rather than a quantitative way.

                          Originally posted by H-A-L-9000 View Post

                          On #2 I guessed one of the chips as HD63485. Its datasheet say it's part of the ACRTC (Advanced CRT controller) family. The main chip of this family seems to be HD63484 (is that one on the board?). Its main feature seems it can have four logical areas on the screen. Searching for HD63484 brings this up: http://www.vgamuseum.info/index.php/...-hd63484-acrtc .

                          the big QFP are as follows:
                          In the four chips that make a square:
                          HD63485CP64 HD63486CP64

                          HD63484CP98 HD63484CP98

                          The line of QFP's to the left consists of 4x HD63486CP64 and a HD63485CP64 (from left to right). So 2 chips would give 8 logical areas I guess.

                          Originally posted by H-A-L-9000 View Post

                          #3: How much RAM does it have? If it's more than 16k it might be better than CGA. It appears to have 24 chips of RAM. Plug it in and see if it does something?

                          on #3:

                          Ram chips are NEC D4164C-15, cant find datasheet! but is listed as 64K x 1-Bit.
                          there are 24 chips so 64k x 24 = 1536k = 192KB. is that correct? 192KB

                          I will try to hook it up to something, The only thing i have to hand is an NEC Multisync, and I'm a bit picky connecting anything to that until I've tested it. Really don't want it to go boom.

                          PS: Its scary talking to a HAL 9000
                          EISA .cfg Archive | Chip set Encyclopedia

                          Comment


                            #14
                            The holland card could be somtehing like 8514/A or TIGA compatible graphics card.
                            <album>

                            Comment


                              #15
                              It is certainly a graphics card, but it can't be TIGA compatible because there is no TMS340x0 on it.

                              Comment

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