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Old 20 November 2020, 13:30   #1
masteries
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Lightbulb For sale: New manufactured Amiga 500 trapdoor memory expansion

Greetings,

During these past times I was developing a workaround in order to use the remaining memory chips from an accelerated Atari ST project. This project requires a change on installed memory due to memory acceses are totally upgraded, new memory chips were used.


Now, these memory chips are used for an Amiga 500 chip RAM expansion, its a 512 KB trapdoor memory expansion.

Image links for users that have problems with embedded images:

https://preview.ibb.co/mDU4o8/ara.jpg

https://preview.ibb.co/dRqr1T/SAM_2671.jpg

https://preview.ibb.co/itaxao/SAM_2667.jpg

https://preview.ibb.co/jsOuMT/SAM_2669.jpg

https://preview.ibb.co/cZX4MT/20180520_20.jpg

https://preview.ibb.co/kh9Uo8/20180520_204.jpg

https://preview.ibb.co/chS4MT/20180520_2048.jpg




The results are these:









and the working results are these:





For Amiga 500+




For Amiga 500










Memory tests passed to the trapdoor memories,


Memory Test program:





Starting the test with a 512 KB trapdoor installed:




1.5 MB test:





I manufactured several of these; these memory modules are hand manufactured at my home in Spain and tested prior to be sent.


These are sent on tracked packages also for international destinations.

The module includes short-circuit protection resistances and enable/disable switch.


Price is 21€ per unit (around 24 $ USD , really depends on current exchange); Spain tracked package cost 5€ and Intenational tracked cost 7.25 €

Payment method: Paypal


Original design post (Spanish) is:

https://www.gp32spain.com/foros/show...-Amiga-500-500
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Old 07 January 2021, 13:50   #2
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