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    1. General 68kMLA News & Stuff

      What's going down in the barracks.

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    2. Conquests

      Discuss your latest vintage Mac finds!

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    1. RetroChallenge

      What can you do given only one month and strictly "retro" hardware? Find out with RetroChallenge!
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    2. Mac II, Quadra & Centris

      Just think, having a Quadra 950 in 1992 would be like having a Mac Pro today… except with more slots, more expandability, and on-board SCSI!

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    3. 68k LC & Performa

      Ah, the consumer computers!

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      The NuBus architecture gets a new brain!

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    2. PCI Power Mac & Performa

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    1. Apple I, ][, /// & Lisa

      Not really 68k Macs, but certainly Vintage!

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    3. Software

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    4. Hacks & Development

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    5. Peripherals

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  • Posts

    • Yes it is consistent every boot/reset.   its working all the way until it don’t one day. And I recapped and found this error. I don’t see any broken traces, how should I change the ram then? It’s soldered.
    • Just recently there was a thread about recreating the 6100 PDS card riser, to allow an HPV card to be installed. The OP also was interested in recreating the 68-pin VRAM sticks, as those cards use them too. However, I believe the problem was with sourcing the appropriate RAM ICs.
    • Thanks very much!   I've stripped out most RAM modules, still no joy, I will now try swapping a few of them around.    Does the machine need a cache chip in order to boot? Can I use the CPU board from a 7500/100 (630-1219-A) ?  
    • Hm, that looks like 682 to me which would be 6.8k. There seem to be a bunch on digikey. You'd just need to narrow down to the right package size.   https://www.digikey.com/products/en/resistors/chip-resistor-surface-mount/52?FV=mu6.8+kOhms|2085%2C-8|52&quantity=1&ColumnSort=0&page=1&stock=1&k=6.8k+resistor&pageSize=25&pkeyword=6.8k+resistor   Perhaps this one would work? https://www.digikey.com/product-detail/en/te-connectivity-passive-product/CRG0805F6K8/A126384CT-ND/7603439
    • In case anyone is wondering, I wound up ordering a SCSI2SD v5.1 adapter, and using this adapter I don't observe the problem. I'm guessing it's a compatibility issue between the Classic II and the SCSI2SD v6 adapter. I'm going to reach out to the designer other SCS2SD and file a bug report, but it's not a big deal - I have plenty of other possible uses for this SCSI2SD v6 adapter.  
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