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22 January 2015, 20:13
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#1 |
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Registered User
Join Date: Sep 2013
Location: CA/USA
Posts: 346
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Help identifying this A500 RAM Expansion
Hi All,
I received this A500 RAM expansion and I have no idea what it is or what manufacturer made it. It has what appears to be a 4 pin header at the top of the picture, you can see a jumper hanging off one pin. There is also a 2 pin header next to the IC (Clock IC I think) but it is hard to tell from the pic. I will upload a different one later tonight. It has no writing on it, and I was told it may not work. I haven't plugged it in as I need to clean it and it looks like it may have some battery damage. I think there was a barrel type battery installed, based on the outline near the clock chip. If anyone knows what Expansion this is and had a manual or something to explain what the pins/jumpers are for that would be great. UPDATE: I have added three pics. Top, Bottom and ZIP Chips. Thanks! ZZ Last edited by Zippy Zapp; 23 January 2015 at 00:31. Reason: Added Pics |
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22 January 2015, 23:12
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#2 |
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Registered User
Join Date: Apr 2010
Location: Italy
Posts: 1,136
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i suppose are 1 mega for 500 plus
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22 January 2015, 23:42
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#3 | |
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Registered User
Join Date: Sep 2013
Location: CA/USA
Posts: 346
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Quote:
Thanks |
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22 January 2015, 23:47
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#4 |
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Registered User
Join Date: Jul 2012
Location: USA
Posts: 239
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Could you show the bottom side?
The pinout http://www.datasheetdir.com/MSM62X42...ime-Clocks-RTC Shows pin 9 is ground and pin 18 voltage in. When you find a pin that corresponds to ground, the one connected to pin 18 is the power in. |
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23 January 2015, 00:23
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#5 |
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Registered User
Join Date: Sep 2013
Location: CA/USA
Posts: 346
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I'll Update the original message with new pics.
Thanks |
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23 January 2015, 06:57
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#6 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,861
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1Mx1 chips.. Seems like a 2MB ranger fast expansion board. A gary board is needed to make it work.
http://images.ihscontent.net/vipimag...MD001-2-95.pdf |
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