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intric8
Seattle, WA, USA

Posted Thu May 12, 2022 6:54 am

That's the Screen of Glory, imo. Congrats!

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halfbrite

Posted Thu May 12, 2022 10:11 am

So does this mean chipram is used for a softkick of sorts for the kickstart ROM? Would that explain my 1MB free vs 2MB or am I a dummy and workbench etc is taking 1MB of chip ram of the 2 populated? It also has 100ns ram in the dips vs the soldered stuff at 80ns, 256k x 4.

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halfbrite

Posted Mon May 23, 2022 1:41 pm

Ended up being the ram was maybe bad? I thought the amiga would not boot if that was the case.

I installed some new 60 nanosecond ram chips and it was recognized, will do a burn in test now.

Now on to seeing if I can fix the floppy.

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luvwagn

Posted Sat Mar 11, 2023 12:52 pm

I just came into an A3000 as well, the 2MB chip is already populated. 25MHz 68030+68882 unit, and it also has the switchable 1.3 vs. 2.0 selection screen (?!)

It has a weird fast-RAM configuration of 2.5MB - the DIP sockets near CPU Accelerator slot are all populated (8x KM44C258AP-8 DIP RAM, for a total of 1MB) and then 1.5MB (?!) of ZIP memory? Or perhaps it is 2MB of ZIP memory and 512KB of it is being eaten by a mapped Kickstart? Not sure yet, first rodeo with an A3000.

I know that the 1st ZIP bank can't be used while the DIPs are populated, and there seems to be 16 zip chips installed, which is 2 banks (groups of 8). Thus, i'm assuming I have 256k×4 zips installed, and these 2 banks = 2MB.

Seems if i stick to existing zips, i can max out at 3MB (of zips) since I can only populate one more bank, and it has to match with same type of RAM :(

I am hoping to have an accelerator in here at some point, which will have much faster onboard memory, so perhaps it isn't worth looking into expanding the onboard memory at all (but I can't resist...)

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intric8
Seattle, WA, USA

Posted Sat Mar 11, 2023 3:50 pm

and it also has the switchable 1.3 vs. 2.0 selection screen (?!)
I love this version of the A3000. I, too, have one of these with the ROM Tower and absolutely adore it. And since I'm a sacrilegious Amigan, I had a friend show me how to flip the priorities so that 1.3 was the preferred OS and 2.0 the secondary. That thing is a work of art. :boing: <3

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iljitsch

Posted Tue Apr 04, 2023 2:08 am

Yes, if your Amiga doesn't have kickstart 2.0 (or later?) in ROM it's read into RAM so you lose half a megabyte of fast RAM.

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luvwagn

Posted Tue Apr 04, 2023 9:30 am

intric8 wrote:
Sat Mar 11, 2023 3:50 pm
and it also has the switchable 1.3 vs. 2.0 selection screen (?!)
I love this version of the A3000. I, too, have one of these with the ROM Tower and absolutely adore it. And since I'm a sacrilegious Amigan, I had a friend show me how to flip the priorities so that 1.3 was the preferred OS and 2.0 the secondary. That thing is a work of art. :boing: <3
Not sure you have a ROM tower AND a kickstart 1.4 that is offering the dual-boot logic - that would be a weird combination?

I too had the kick 1.4 and ability to dual-boot 1.3 or "2.x" (you can even make a superkickstart 3.x file to be soft-kicked on an A3000 like this, fun!). However, I had to forego all of that and re-burn my existing Intel 27c220 EPROMs from 1.4 to 3.1, since I have a BFG9060 coming online soon, and it won't work with the 1.4x and softkick mechanism, as that uses 68030 MMU specific logic, and doesn't account for an 040 or 060.

BTW, if any A3000 folks are reading this thread and need RAM for motherboard, I have some.

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blindguy

Posted Sat Apr 15, 2023 1:54 pm

BTW, if any A3000 folks are reading this thread and need RAM for motherboard, I have some.
Yes, I need some memory for the MB!!! How much you asking?

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luvwagn

Posted Sun Apr 16, 2023 11:09 pm

reached out over email

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mike34

Posted Wed May 10, 2023 1:19 am

obitus1990 wrote:
Thu May 05, 2022 7:20 am
All of the information you seek can be found in the A3000 manual word hurdle.

A condensed form of the info needed can be found here.
I found the information I was looking for here, thanks a lot for sharing it





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