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Wanted: high end 486 motherboard

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    Wanted: high end 486 motherboard

    I'm not going to be happy until I get this system built and the major hurdle is the motherboard at this point. The 486 motherboard I'm looking for must have the following requirements.

    4x 72pin memory slots 256mb ram maximum (edo support a +)
    4x pci slots
    vesa slots a big +
    must support 1mb cache

    Examples from stason:
    1 2 3 4

    obviously it has to work, shoot me a PM if you have anything. thanks!
    It is a mistake to think you can solve any major problems just with potatoes.

    #2
    I can almost guarantee I've got a board that meets those requirements, but I don't know how to check if it supports 1MB cache. Some boards don't even have models or brands, so I can't just look them up, either. I could test for how much cache they have, but that doesn't tell you what they support.. Ideas?
    More commonly known as "Yushatak" - www.yushatak.com
    Focused on 486 and Pentium Machines
    I collect All-In-One PCs and Keyboard PCs, especially Compaq.

    Comment


      #3
      Originally posted by Raven View Post
      I can almost guarantee I've got a board that meets those requirements, but I don't know how to check if it supports 1MB cache. Some boards don't even have models or brands, so I can't just look them up, either. I could test for how much cache they have, but that doesn't tell you what they support.. Ideas?
      "generally speaking" and "usually" when I see 1mb support there are 9 cache sockets, and they will take 32 pin chips.
      It is a mistake to think you can solve any major problems just with potatoes.

      Comment


        #4
        Alright - I'm planning on building a 486 box myself, so I'll be looking through similar boards. If I find one that meets your requirements I'll post back.
        More commonly known as "Yushatak" - www.yushatak.com
        Focused on 486 and Pentium Machines
        I collect All-In-One PCs and Keyboard PCs, especially Compaq.

        Comment


          #5
          I bought one of these from a lot auction on ebay a few weeks ago: http://stason.org/TULARC/pc/motherbo...4SAW-2-W5.html

          has everything I want except it will only take 512kb cache. It also does not like the number 9 VLB video card I was going to use.

          I hate how this has stalled my project. I have a copy of mortal combat 2 on my shelf that I'm going to VERY MUCH enjoy once i get this going.

          Also, I dont care if the board has onboard serial/parallel/ide. Its a non-concern.
          Last edited by luckybob; February 16, 2011, 03:49 PM. Reason: added info.
          It is a mistake to think you can solve any major problems just with potatoes.

          Comment


            #6
            *bump* still looking... If someone out there HAS a board like this, and just doesnt want to sell it, giving me a model number to ebay for would be helpful...
            It is a mistake to think you can solve any major problems just with potatoes.

            Comment


              #7
              Not exactly what you're looking for (only has 512kb Cache and no VLB, but otherwise fits your requirements), but close-ish:
              Gigabyte GA-586HX Actually my board seems to be another version ... this is a picture of the one I have (not my photo) http://img485.imageshack.us/img485/7844/ga586hx2zt9.jpg
              PM if it's of interest for you.
              Last edited by shock__; February 18, 2011, 02:37 AM.
              ARGUS (advanced, reverse-engineered GUS) project leader.

              Comment


                #8
                How much RAM do you plan on running in this machine and whats the target application? 1MB of cache is extremely rare in 486 class machines. I don't know if it will make much of a speed difference if you are only running say 32MB of RAM.

                Comment


                  #9
                  I still haven't had a chance to look through my stuff again for ya - ended up getting contracted to do a bunch of computer work yesterday (yay now I can afford to pay my insurance and fix my transmission! ) so I was busy. Hopefully will get to it today.

                  I can say that L2 cache is very inconsequential in my experience. My Presario 425 has ZERO L2 and manages to run everything slightly above average for a 486 box, like Quake - the L1 cache is far more important, but I'm sure you know that bit. However, maybe you have some app that can use it, or some trick that you want to try, or just want it to be the best - which I can understand.

                  Most games that you'd run on a 486 are targeted for a 286 or 386 "and up", so they don't require much juice. The remainder are things like Doom, Duke3D, and Quake. Doom runs fine on a 486 with a decent CPU (DX4 or better, might run "ok" on a dx2-66), Duke3D runs pretty good on my Am5x86-133, and Quake runs what some people call playably on it too. I imagine that with a better video card than I have in mine (onboard) it'd run them all great, but maybe L2 cache would make that difference too - dunno. My path is to get a POD83 running in there, and we're making good progress!
                  More commonly known as "Yushatak" - www.yushatak.com
                  Focused on 486 and Pentium Machines
                  I collect All-In-One PCs and Keyboard PCs, especially Compaq.

                  Comment


                    #10
                    Originally posted by Raven View Post
                    The remainder are things like Doom, Duke3D, and Quake. Doom runs fine on a 486 with a decent CPU (DX4 or better, might run "ok" on a dx2-66), Duke3D runs pretty good on my Am5x86-133, and Quake runs what some people call playably on it too. I imagine that with a better video card than I have in mine (onboard) it'd run them all great, but maybe L2 cache would make that difference too - dunno. My path is to get a POD83 running in there, and we're making good progress!
                    Doom and Doom 2 run fine on a 80486DX33 with a VLB video card. Duke Nukem 3D really needs a Am5x86-133 with a strong S3 Virge or better video card. Just my personal experience.

                    Comment


                      #11
                      Originally posted by njroadfan View Post
                      How much RAM do you plan on running in this machine and whats the target application? 1MB of cache is extremely rare in 486 class machines. I don't know if it will make much of a speed difference if you are only running say 32MB of RAM.
                      The full 256mb. The idea is that I can use 1/2 as a ram drive, and load smaller sames into it on demand. The 1mb cache will *should* make all of that 256mb cacheable. At least in theory.

                      Originally posted by shock__ View Post
                      Not exactly what you're looking for (only has 512kb Cache and no VLB, but otherwise fits your requirements), but close-ish:
                      Gigabyte GA-586HX Actually my board seems to be another version ... this is a picture of the one I have (not my photo) http://img485.imageshack.us/img485/7844/ga586hx2zt9.jpg
                      PM if it's of interest for you.
                      Sadly its a pentium, not a 486.

                      Also the "target application" will be the following games (in no particular order)

                      Carmageddon
                      Decent 2/3
                      Grand Theft Auto
                      Tomb Raider
                      Mortal kombat 2
                      Quake
                      Fallout 1 & 2 (i really hope so)
                      tie fighter & defender of the empire (still looking for xwing but w/e)

                      might try the original diablo and starseige tribes.

                      I know a few games would most likely be better off on a pentium (read fallout) But its a slippery slope. If I say "pentium" then that means socket 7. then I end up just using my super 7 system and overkill it. besides I have older games I'd also like to try out.
                      It is a mistake to think you can solve any major problems just with potatoes.

                      Comment


                        #12
                        Originally posted by luckybob View Post
                        Carmageddon
                        Decent 2/3
                        Grand Theft Auto
                        Tomb Raider
                        Quake

                        [...] then I end up just using my super 7 system and overkill it.
                        Not really, those games came out when the 486 was outdated already. While a 486 might meet their minimum requirements, I have severe doubts they will be enjoyable. I'm pretty certain that Descent 3 won't even run at all. See wikipedia
                        Also, you can always cut off L1/L2 cache on a Pentium, as well as underclocking it. That way they can go as low as 33mhz 386 machines performance wise.
                        ARGUS (advanced, reverse-engineered GUS) project leader.

                        Comment


                          #13
                          Originally posted by njroadfan View Post
                          How much RAM do you plan on running in this machine and whats the target application? 1MB of cache is extremely rare in 486 class machines. I don't know if it will make much of a speed difference if you are only running say 32MB of RAM.
                          Originally posted by shock__ View Post
                          Not exactly what you're looking for (only has 512kb Cache and no VLB, but otherwise fits your requirements), but close-ish:
                          Gigabyte GA-586HX Actually my board seems to be another version ... this is a picture of the one I have (not my photo) http://img485.imageshack.us/img485/7844/ga586hx2zt9.jpg
                          PM if it's of interest for you.

                          you are correct. And I have given it a LOT of thought. If I cant get the motherboard I want I do have a few dual-pentium pro boards waiting in the wings. If you have ever seen an asus P65up5 in action... i'm going to snap a few pictures, brb.
                          It is a mistake to think you can solve any major problems just with potatoes.

                          Comment


                            #14
                            I am not currently aware of any PCI 486 board that can cache all 256MB. However, there are some EISA boards that will let you do this.
                            "Will the Highways on the internets become more few?"

                            V'Ger XT

                            Comment


                              #15
                              well. It was a chipset thing mostly. Intel chipsets wont cache more than 64mb ever. save for the 430hx. It depended more on the tag ram in the cache. A 8 bit wide tag ram will cache 64mb of memory. However the 11 bit wide chips, if supported by the chipset will cache 512mb. this was "optional"
                              It is a mistake to think you can solve any major problems just with potatoes.

                              Comment

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