FS RARE 1 MB chipRAM expansion to A500+

amiga2000 · 24 August 2016, 11:17

..

Zetr0 · 24 August 2016, 11:46

@Amiga2000

A couple of question for your potential customers.

I noticed that this adaptor comes with a real time clock on board - this leaves me to consider that this is not specifically for the A500+ but more the A500 - since the former already has a clock.

This would make it a 1MB RAM adaptor, that in the A500+ will be asserted as CHIP RAM, where is in a standard A500 would only be asserted as 1MB Other - in fact on any A500 revision less than 5.3 it would only be able to assert 512KB of RAM as other.

While the 1MB RAM adaptor might be RARE in Hungary, sadly in the UK, and a lot of Europe they are not that uncommon. I hope this information helps and I wish you luck in your sale.

amiga2000 · 25 August 2016, 02:05

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Zetr0 · 25 August 2016, 05:07

@amiga2000

I meant no offence, your card is the AlfaRam RA5-1M - In fact yours is interestingly a fully populated board that also includes the clock circuit which is required for the Original A500 as the A500+ has its own on-board clock - I suspect this was purchased from the factory with full 1MB or was user updated. Its quiet interesting.

attle · 25 August 2016, 09:07

I have the same card for my A500+, but it lacks RTC circuitry. Perhaps someone used it in a A500 at one point (with 512k RAM), and then later installed RAM chips for the full 1MB to use in a A500+.

idrougge · 25 August 2016, 17:33

I have an unpopulated version. Depending on what components were mounted, Alfadata changed the model number.

24 August 2016, 11:17	#1
amiga2000 Banned Join Date: Jan 2016 Location: Budapest Hungary Posts: 132	FS RARE 1 MB chipRAM expansion to A500+ .. Last edited by amiga2000; 27 August 2016 at 02:15.

25 August 2016, 02:05	#3
amiga2000 Banned Join Date: Jan 2016 Location: Budapest Hungary Posts: 132	.. Last edited by amiga2000; 27 August 2016 at 02:15.

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24 August 2016, 11:46	#2
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@Amiga2000 A couple of question for your potential customers. I noticed that this adaptor comes with a real time clock on board - this leaves me to consider that this is not specifically for the A500+ but more the A500 - since the former already has a clock. This would make it a 1MB RAM adaptor, that in the A500+ will be asserted as CHIP RAM, where is in a standard A500 would only be asserted as 1MB Other - in fact on any A500 revision less than 5.3 it would only be able to assert 512KB of RAM as other. While the 1MB RAM adaptor might be RARE in Hungary, sadly in the UK, and a lot of Europe they are not that uncommon. I hope this information helps and I wish you luck in your sale.

25 August 2016, 05:07	#4
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@amiga2000 I meant no offence, your card is the AlfaRam RA5-1M - In fact yours is interestingly a fully populated board that also includes the clock circuit which is required for the Original A500 as the A500+ has its own on-board clock - I suspect this was purchased from the factory with full 1MB or was user updated. Its quiet interesting.

25 August 2016, 09:07	#5
attle Registered User Join Date: Aug 2012 Location: RAM: Posts: 83	I have the same card for my A500+, but it lacks RTC circuitry. Perhaps someone used it in a A500 at one point (with 512k RAM), and then later installed RAM chips for the full 1MB to use in a A500+.

25 August 2016, 17:33	#6
idrougge Registered User Join Date: Sep 2007 Location: Stockholm Posts: 4,332	I have an unpopulated version. Depending on what components were mounted, Alfadata changed the model number.

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