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Author Topic: MegaChip in an A500+  (Read 2611 times)

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Offline curtisTopic starter

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MegaChip in an A500+
« on: December 20, 2012, 11:33:54 PM »
Picked up a 500+ mobo a couple of weeks back and was wondering IF a megaChip board could be added to it and if so, what would the memory configuration look like?

The motherboard has 1Mb onboard.

Thanks,

Curtis
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Offline Lurch

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Re: MegaChip in an A500+
« Reply #1 on: December 21, 2012, 12:55:28 AM »
Quote from: curtis;719846
Picked up a 500+ mobo a couple of weeks back and was wondering IF a megaChip board could be added to it and if so, what would the memory configuration look like?

Not needed/wont work, just buy a 1MB trap door expansion for the A500plus.
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Offline Jope

Re: MegaChip in an A500+
« Reply #2 on: December 21, 2012, 07:46:03 AM »
Indeed it will not work. The Agnus socket has a different pinout in the A500+.
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Offline curtisTopic starter

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Re: MegaChip in an A500+
« Reply #3 on: December 21, 2012, 11:42:24 PM »
I was pretty sure it wouldn't work, but wanted to make sure.

Now the hard part, find a 1Mb trapdoor expansion!
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Offline Darth_X

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Re: MegaChip in an A500+
« Reply #5 on: December 22, 2012, 09:43:11 AM »
Quote from: Jope;719875
Indeed it will not work. The Agnus socket has a different pinout in the A500+.


Is it a 2MB Agnus on the A500+?
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Offline Lurch

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Re: MegaChip in an A500+
« Reply #6 on: December 22, 2012, 10:06:21 AM »
Quote from: Darth_X;719991
Is it a 2MB Agnus on the A500+?


Yes.
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Offline desantii

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Re: MegaChip in an A500+
« Reply #7 on: December 22, 2012, 01:53:44 PM »
You can also use a regular a 500 512kn expansion for now and have 1.5mb chip ram


Quote from: curtis;719948
I was pretty sure it wouldn't work, but wanted to make sure.

Now the hard part, find a 1Mb trapdoor expansion!
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Offline curtisTopic starter

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Re: MegaChip in an A500+
« Reply #8 on: December 23, 2012, 12:26:16 AM »
Thought that would be the case, but with airey36 having 3 of them available at a reasonable price, I think I'll go that route.

Thanks everybody for the input and especially Lurch for the links!

Curtis

Quote from: desantii;720006
You can also use a regular a 500 512kn expansion for now and have 1.5mb chip ram
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Offline Lurch

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Re: MegaChip in an A500+
« Reply #9 on: December 23, 2012, 07:26:23 AM »
Glad I could help, hopefully shipping wont be too bad. airey is pretty good and I usually get stuff I've ordered pretty quick and I'm on the other side of the planet :-)

Hard to beat his pricing though.
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Offline Oldsmobile_Mike

Re: MegaChip in an A500+
« Reply #10 on: December 25, 2012, 02:51:53 AM »
What would happen if you stuck a 1meg board designed for the A500+ in a regular A500?  How much of it would be recognized, i.e., as "slow-fast" memory?
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Offline Zac67

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Re: MegaChip in an A500+
« Reply #11 on: December 25, 2012, 01:41:15 PM »
Quote from: Oldsmobile_Mike;720257
What would happen if you stuck a 1meg board designed for the A500+ in a regular A500?  How much of it would be recognized, i.e., as "slow-fast" memory?


512K (which may possibly not work, or nothing at all)
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Offline Lurch

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Re: MegaChip in an A500+
« Reply #12 on: December 25, 2012, 08:17:33 PM »
512k... works just fine but wont go over 1MB as is expected :-)
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