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Thread: Help with Modified Golden Gate 486 SLC

  1. #1
    matt3k's Avatar
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    Default 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; 10th September 2019 at 11:11.

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    GurúMeditating trixster's Avatar
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    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; 10th September 2019 at 11:37.
    A1200 B1260 80Mhz Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500
    A4000 CSMk2 G3 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 MOS | Atari Falcon | 2600 | X68000 | PC Engine | CD32

  3. #3
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    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; 10th September 2019 at 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

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    matt3k's Avatar
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    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?

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    matt3k's Avatar
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    Quote 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?

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    GurúMeditating trixster's Avatar
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    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; 10th September 2019 at 17:48.
    A1200 B1260 80Mhz Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500
    A4000 CSMk2 G3 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 MOS | Atari Falcon | 2600 | X68000 | PC Engine | CD32

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    matt3k's Avatar
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    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...

  8. #8
    Dancing with bridgeboards Amibayer! BlindGerMan's Avatar
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    386! A2386! :d
    Last edited by BlindGerMan; 10th September 2019 at 18:06.
    A2000 2/128/-MB-OS3.9-DKB Wildfire-Picasso IV+Concierto+PabloII+Paloma-Deneb-A2386@TI486SLC2/66-ATI Mach64-Tekram DC600T
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    matt3k's Avatar
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    Quote 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?

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    GurúMeditating trixster's Avatar
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    Could you ask your seller what the mod does?
    A1200 B1260 80Mhz Indi AGA2 Ide-fix Express | A3000 WarpEngine060 CV64 Deneb 486SXLC2 | A500
    A4000 CSMk2 G3 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 MOS | Atari Falcon | 2600 | X68000 | PC Engine | CD32

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