English Amiga Board - View Single Post - 0.5mb trapdoor expansion on 1mb A500+..still only 1mb ??

1NOM155 · 26 January 2019, 14:05

I dont own a 500+ but a friend of mine have one with commodore 500 ram upgrade and gets 1.5mb of chip ram. i dont know if 3d party ram expansions did something diferent from commodore ram expansion design.

Also if you have Agnus 8375 and did the same modifications like Kipper2k did, probably the ram expansion you got have some issues. I dont know what you can do more exept trying a diferent ram exp to check

probably is better to provide more information with pictures of your A500 detaling the modifications you made and also the expasion card you have, others with more experience than me might help you.

26 January 2019, 14:05	#8
1NOM155 Registered User Join Date: Apr 2015 Location: Lisbon Posts: 65	I dont own a 500+ but a friend of mine have one with commodore 500 ram upgrade and gets 1.5mb of chip ram. i dont know if 3d party ram expansions did something diferent from commodore ram expansion design. Also if you have Agnus 8375 and did the same modifications like Kipper2k did, probably the ram expansion you got have some issues. I dont know what you can do more exept trying a diferent ram exp to check probably is better to provide more information with pictures of your A500 detaling the modifications you made and also the expasion card you have, others with more experience than me might help you.