exact model of 68882 that can fit on the Blizzard 1230 mk4?

guybrush · 13 June 2021, 00:07

Not sure what is the exact version of the 68882 that goes on the Blizzard MK4 1230 card. The manual does not refer to a specific model, and Motorola made different versions for it.

Is there a specific tag for it? Are they even sold these days?

guybrush · 13 June 2021, 03:55

Found it; instead of looking for Amiga parts I went to the Motorola site and found historical data on the type of MMU that are supported by the 68030.

I realized that I can also look at the one on my card directly; that was quite silly.

The actual part is MC68882RC50A-PGA-MC680X0

AmigaHope · 14 June 2021, 15:29

Any PGA 68882 should work, I think it only came in 2 kinds of packages (one PGA package, one PLCC package). You obviously want to use the 50Mhz part since you have a 50Mhz crystal in your system (and I think the 1230 mk4 has no provision for a separate FPU xtal), but you could probably get away with overclocking a lower spec one.

guybrush · 26 June 2021, 23:58

Quote:

Originally Posted by AmigaHope

Any PGA 68882 should work, I think it only came in 2 kinds of packages (one PGA package, one PLCC package). You obviously want to use the 50Mhz part since you have a 50Mhz crystal in your system (and I think the 1230 mk4 has no provision for a separate FPU xtal), but you could probably get away with overclocking a lower spec one.

Yep; need the exact match for my main CPU; so went for the 50 MHZ model; which is marked by "RC50A"; the 68030/50 is "RC50B" instead

13 June 2021, 00:07	#1
guybrush Registered User Join Date: Jul 2015 Location: usa Posts: 243	exact model of 68882 that can fit on the Blizzard 1230 mk4? Not sure what is the exact version of the 68882 that goes on the Blizzard MK4 1230 card. The manual does not refer to a specific model, and Motorola made different versions for it. Is there a specific tag for it? Are they even sold these days?

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13 June 2021, 03:55	#2
guybrush Registered User Join Date: Jul 2015 Location: usa Posts: 243	Found it; instead of looking for Amiga parts I went to the Motorola site and found historical data on the type of MMU that are supported by the 68030. I realized that I can also look at the one on my card directly; that was quite silly. The actual part is MC68882RC50A-PGA-MC680X0

14 June 2021, 15:29	#3
AmigaHope Registered User Join Date: Sep 2006 Location: New Sandusky Posts: 942	Any PGA 68882 should work, I think it only came in 2 kinds of packages (one PGA package, one PLCC package). You obviously want to use the 50Mhz part since you have a 50Mhz crystal in your system (and I think the 1230 mk4 has no provision for a separate FPU xtal), but you could probably get away with overclocking a lower spec one.

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