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  • Help with Modified Golden Gate 486 SLC

    I'm new to the bridgeboard world of Amiga's and was looking for help.

    This one looks like it was a regular 486 SLC that the prior owner made it a SLC2 by adding a the faster Cyrix chip. Crazy hack job, but the prior owner claims it works.

    I was going to put it in my 3000T with a Tseng ET4000W32i and a decent sound card, something compatible and with wave tables. Was going to use it for fun retro gaming.

    My 3000T has a warp engine 060@80MHz.

    1. Is the ET4000 a good card for the Goldengate?
    2. What soundcard would you recommend?
    3. What will I need to get started as far as software?
    4. The card doesn't have ram, should I track some down?
    5. I'm using 3.1.4.1 and I'm concerned about it being compatible? (I have found a few things that don't run right under it).
    6. There is a fan on it that is just loose on the board, do I need the fan or will a good heatsink be good?
    7. Should I consider updating to the ti chip with more cache? Does it make a big difference for retro gaming? Who does the mods?
    8. Any comments on the hack job done?

    Click image for larger version

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    Last edited by matt3k; 10 September 2019, 11:11.

  • #2
    Posted my advice on the eab thread

    I'd love to know what that hack does. Does it raise the bus speed?
    Last edited by trixster; 10 September 2019, 11:37.
    A1200 B1260 Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500 | AA3000+
    A4000 CSMk2 PPC 950Mhz Voodoo3 Indi AGA Deneb | Saturn | PS1&2 | C64 | SNES | Neo Geo | 3DO | Enterprise 128
    A3020 | A3000 | BBC B | Master | Atom | CPC6128 | Jaguar | G5 | Atari Falcon | 2600 | X68000 XVI | PC Engine | CD32

    Comment


    • #3
      looks like someone got the cpu from a clip-on upgrade board and then added the clock circuit or something with some 74series and wires
      Last edited by keropi; 10 September 2019, 11:44.
      Aacheron and slk486 are my heroes
      A1200D mfilos ed. : ACA 1231/42 , Indivision MK2 , IDEfix Express , Subway , PicoPSU 120w custom 3.9 ROM/OS

      Comment


      • #4
        How did you mount the fan to the cpu? I can't see an easy way to accomplish that?


        Does the GG work with an 060 over clocked at 80MHz?

        Comment


        • #5
          Originally posted by keropi View Post
          looks like someone got the cpu from a clip-on upgrade board and then added the clock circuit or something with some 74series and wires
          I assume that it will just be a normal SLC2 with the mod? Could he have over clocked it or other improvement?

          Comment


          • #6
            The SLC2 is a clock doubled chip, so you set a software flag and it runs at twice the crystal speed. In this case the GG derives it’s 25mhz from halving the 50mhz crystal and the SLC2 then runs at 25mhz if the flag isn’t set or 50 if it is.

            So maybe he didn’t have the software and is setting the clock of the cpu directly using that hack?

            ive found that the GG bus does not like operating with even a slight overclock - changing the 50mhz crystal to something higher results in crash city. It’s a shame the GG does not have seperate bus and cpu crystals like I think the A2386SX does
            Last edited by trixster; 10 September 2019, 17:48.
            A1200 B1260 Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500 | AA3000+
            A4000 CSMk2 PPC 950Mhz Voodoo3 Indi AGA Deneb | Saturn | PS1&2 | C64 | SNES | Neo Geo | 3DO | Enterprise 128
            A3020 | A3000 | BBC B | Master | Atom | CPC6128 | Jaguar | G5 | Atari Falcon | 2600 | X68000 XVI | PC Engine | CD32

            Comment


            • #7
              Thanks for the help.

              Saw BlindGerMan 286 giving crazy results with overclocking! Seems like you would be better off buying a Commodore 286sx board and starting with that. Oh well, I'll enjoy the 486, once I get it going...

              Comment


              • #8
                386! A2386! :d
                Last edited by BlindGerMan; 10 September 2019, 18:06.
                A2000 2/128/-MB-OS3.9-DKB Wildfire-Picasso IV+Concierto+PabloII+Paloma-Deneb-A2386@TI486SLC2/66-ATI Mach64-Tekram DC600T
                A2500/30 2/112/6MB-OS3.1-A2630+BigRAM2630-A2091-A2410-A2065-A2286-A2320
                A1200 2/256/-MB-OS3.9-Blizzard 1230IV/SCSI-IDEfix Express-Indi AGA MkIIcr

                Comment


                • #9
                  Originally posted by BlindGerMan View Post
                  386! A2386! :d
                  My bad!.. Killer speed and most impressive. Have you ever run windows on it? What do you use it for mainly?

                  Comment


                  • #10
                    Could you ask your seller what the mod does?
                    A1200 B1260 Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500 | AA3000+
                    A4000 CSMk2 PPC 950Mhz Voodoo3 Indi AGA Deneb | Saturn | PS1&2 | C64 | SNES | Neo Geo | 3DO | Enterprise 128
                    A3020 | A3000 | BBC B | Master | Atom | CPC6128 | Jaguar | G5 | Atari Falcon | 2600 | X68000 XVI | PC Engine | CD32

                    Comment


                    • #11
                      He couldn't remember, it was made just after he bought the card new in the 90's. He said IT added a chip and made it faster...

                      I would love to figure out what they did exactly to see if there is something more than over clocking.

                      I put it in a system and the board seems to be ok according to the Amiga ROMs anyways....
                      Last edited by matt3k; 10 September 2019, 18:59.

                      Comment


                      • #12
                        The two disks are on this website:

                        http://amiga.resource.cx/exp/goldengate

                        id love to see if it works when you’ve installed everything!

                        - - - Updated - - -

                        This provides a good package to benchmark your card:

                        https://www.philscomputerlab.com/dos...mark-pack.html
                        Last edited by trixster; 10 September 2019, 18:57.
                        A1200 B1260 Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500 | AA3000+
                        A4000 CSMk2 PPC 950Mhz Voodoo3 Indi AGA Deneb | Saturn | PS1&2 | C64 | SNES | Neo Geo | 3DO | Enterprise 128
                        A3020 | A3000 | BBC B | Master | Atom | CPC6128 | Jaguar | G5 | Atari Falcon | 2600 | X68000 XVI | PC Engine | CD32

                        Comment


                        • #13
                          Originally posted by trixster View Post
                          The two disks are on this website:

                          http://amiga.resource.cx/exp/goldengate

                          id love to see if it works when you’ve installed everything!
                          I will try it out when I get sometime this weekend and let you know!

                          Are the latest software versions on Amiga Resource?

                          I contacted the seller to see if he kept contact with the tech still. We will see.

                          What performance tests do you all run on the pc side?

                          Comment


                          • #14
                            See my post above

                            using demo3 from the ultimate doom wad with -nosound flag and two levels of green border, my GG gives 3863 gametics in 13632 realtics = 9.918 fps
                            Last edited by trixster; 10 September 2019, 19:06.
                            A1200 B1260 Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500 | AA3000+
                            A4000 CSMk2 PPC 950Mhz Voodoo3 Indi AGA Deneb | Saturn | PS1&2 | C64 | SNES | Neo Geo | 3DO | Enterprise 128
                            A3020 | A3000 | BBC B | Master | Atom | CPC6128 | Jaguar | G5 | Atari Falcon | 2600 | X68000 XVI | PC Engine | CD32

                            Comment


                            • #15
                              Originally posted by trixster View Post
                              See my post above
                              Will download and test. Have to find an MS-Dos disk. LOL, think I have 6.22 around here, be luck if it still boots. .

                              What OS do you use?

                              What is the sequence to get just see if it works?

                              Comment

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