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11 March 2022, 17:22
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#1 |
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Registered User
Join Date: Mar 2022
Location: Imlay City, MI
Posts: 1
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Help Identifying mods
I have recently gotten hold of an Amiga 500 (PAL rev:6a) it it seems to already have a few mods that I cant identify.
The first is a switch that goes to a riser board under the Even CIA The second seems to be JP3 solder bridged. the one mod I can id is ram sockets installed, but what RamChips can I put in and is the a mod need to use the extra ram (is this fast or chip ram) |
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11 March 2022, 19:21
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#2 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,862
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The CIA mod is probably a boot selector.
JP3 has been modified and then bridged back into normal orientation. Either someone was debugging a RAM issue, or this board might have had a reslow circuit installed in the past to enable the trapdoor RAM separately from the soldered-in sockets on the motherboard. The RAM chips are the same kind as the ones already in there. 4x256k. Whether it is Chip or Fast depends on JP2 and JP7. |
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