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| Total Systems Mercury difficulties in SE FDHD |
Posted by: JRL on 2020-07-25 20:19:06
So I picked up a dual SE FDHD with a Total Systems Mercury upgrade (16 MHz 030), and it's having a weird set of problems.
The original motherboard came to me with a shot SCSI bus so for now I decided to move the FDHD roms and upgrade to another SE board I had here.
Right now, there are the following issues:
-The 16 MHz '030 is recognized as a 16 MHz '020 by Tattletech/Techtool/etc..
-Both versions of Gemstart don't want anything to do with the board (they act as if no card was installed at all)
-The card has a 68882 FPU installed (not original to the card but it was installed by the previous owner) but it isn't recognized. Of note the FPU is a 25 MHz chip but the one provided by Total Systems with this upgrade was a 20 MHz.
I haven't tried the Mercury upgrade in another SE just yet.
Hoping someone else has one of these upgrades as well!
-J
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Posted by: Crutch on 2020-07-26 07:03:43
I messed around with one of these in a Plus for weeks before I got it working right. If TattleTech sees an 020 instead of the 68000 on your mobo, the board is presumably good and working right. Sounds like a driver config issue. How did you set the switches when you installed Gemstart? What system version are you running?
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Posted by: sstaylor on 2020-07-26 07:14:17
For FDHD you need to move the roms *and* the SWIM chip
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Posted by: JRL on 2020-08-01 19:31:11
Whoops, I was indeed not being smart with how I set up GemStart. Works great now!
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Posted by: WakelessFoil on 2020-08-29 14:06:59
I want to put an accelerator in my plus. Will this work? Or is it just for an SE?
https://www.ebay.com/itm/203088494954
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Posted by: Byrd on 2020-08-29 15:44:46
That one is just for an SE via PDS - the Mac Plus accelerators attach to the CPU by a "Killy clip"
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Posted by: Crutch on 2020-08-29 19:46:33
I can’t tell for sure but that card does look like it has a 68000-shaped row of dots ... are those holes where one could attach a Killy clip? (Still need the clip though)
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Posted by: Daniël on 2020-08-29 20:27:51
I can’t tell for sure but that card does look like it has a 68000-shaped row of dots ... are those holes where one could attach a Killy clip? (Still need the clip though) Very likely, it seems like the MicroMac Performer was similar to this, as it too came in Killy Clip or PDS variations, for the Plus and SE respectively. Not too surprising, given those Macs were sold side-by-side, it would have been cheaper to just have one board design that could be catered to either machine.
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Posted by: Bolle on 2020-08-29 23:36:54
You can run that card in a Plus as well but you will have to solder it on top of your 68000 (or get a clip from somewhere)
Also you‘ll have to solder a jumper wire between the accelerator and the logicboard to get the 16MHz clock signal to the accelerator.
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