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Author Topic: I want more than 2mb Fast RAM on my A1000...how?  (Read 4692 times)

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Offline TheGoose

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Re: I want more than 2mb Fast RAM on my A1000...how?
« on: March 29, 2011, 02:07:17 PM »
Quote from: Amiga_Nut;625690
Is there a technical reason why all A1000 zorro side expansion slot memory boards are 2mb max for the A1000? If I slot in an A500 8mb unit will it work or will the A1000 only see the first 2mb for some technical reason despite the Zorro 1 slot being identical?  If I use TWO 2mb ram boards and one has a pass through and connect them both together what happens? Fire? Explosion? Space-Time continuum folds in on itself and we instantaneously get transported back to 1960s? :)

"Space-Time continuum folds in on itself and we instantaneously get transported back to 1960s" - And you might turn into John Denver.

Actually I think (correct me anyone):

1. There is a 8 MB limit on the A1000 ?
2. You can chain several sidecar expansions together, totally safe, that's why many of them have a pass-through.

Now, some combinations might give you trouble, but most that were built with kickstart 1.3 (with autoconfig support) will all work nicely.
« Last Edit: March 29, 2011, 02:09:34 PM by TheGoose »
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Offline TheGoose

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Re: I want more than 2mb Fast RAM on my A1000...how?
« Reply #1 on: March 29, 2011, 02:41:48 PM »
@Jim "It may not work reliably though, that bus was kinda noisy."

Damn it Jim! I have never connected anything more than 2 cards... if he's going to 3, he is going into an unknown territory, the bus might not take that kind of punishment!

Let us know if you make it to the other "side" ...

:lol:
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Offline TheGoose

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Re: I want more than 2mb Fast RAM on my A1000...how?
« Reply #2 on: March 29, 2011, 02:58:38 PM »
Quote from: save2600;625707
Today, I wouldn't even bother with such a scenario. Besides, 2.5mb RAM is plenty on an A1000 with 68000 and no hard drive.


Save's words are pretty true. I can say, truly I have used 2 cards (ram) and they did work. And 2 / 2.5 MB should be about all you need on an old OCS machine.
Some cards / towers came with power connectors, like Save said, gave a little extra +5v to the extreme setups...

Try 2 cards briefly, see how that goes. Clean the pins on the A1000 expansion slot if you have not bothered, it can help. The underside is about impossible to reach without removing the whole MB though.
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Offline TheGoose

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Re: I want more than 2mb Fast RAM on my A1000...how?
« Reply #3 on: March 29, 2011, 03:21:38 PM »
Quote from: save2600;625717
MrMKL's little 68k boards are awesome. Super low power and virtually no noise contention because of the design (think AdSpeed board here). He's working on an all in one board that'll have IDE, RAM and a CF slot. I know he's produced IDE and CF (no RAM) as I had one, but the thing is, it doesn't work well in the A1000 because the CF slot extends into the disk drive. And then there's the fact your A1000 Kickstarts are missing the necessary A600's IDE/SCSI.device. Best have Kickstart 3.x (okay, you *can* use 2.x, but why bother?) in ROM before thinking you can use a hard drive in it.

What I'd LOVE to see is him produce an IDE/Kickstart/RAM board. OR forego the IDE port and rig that CF card on the other side, so it doesn't interfere with the internal floppy.


Who's this? where can I read more? linky....
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Offline TheGoose

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Re: I want more than 2mb Fast RAM on my A1000...how?
« Reply #4 on: March 29, 2011, 03:53:25 PM »
Quote from: save2600;625721
BTW: Goose, I sent you a PM a while ago... if you ever want to sell some of your internal A1000 stuff (such as your Multistart, AdIDE, etc.), LMK!   :)

Here's a linky for 'ya:

http://www.students.tut.fi/%7eleinone3/ide/i68k.html


Save, if I part with it you are my #1 candidate for A1000 ubber lover. Now about this awesome board, I can't find an email address... Why don't you pursue this guy more Save? Do you have one of these?

You know, we could probably "copy" the design & parts from the AdIDE, put them on a ghetto Radio Shack through-the-hole board, hmmm. Probably some custom ICD chip on there we can no longer get hold of....
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Offline TheGoose

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Re: I want more than 2mb Fast RAM on my A1000...how?
« Reply #5 on: March 29, 2011, 07:26:09 PM »
Uh, I don't know about the compatibility, sorry. Um, but what are these FastPals, I understand about the PAL chips but not heard of this. Where do you get these? Back to the google ...



Sorry if I just hijacked your hijack? :biglaugh:
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