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View Full Version : For Sale New manufactured Amiga 500 and 500+ 512KB trapdoor memory expansion



masteries
19th June 2018, 10:57
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:

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



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



and the working results are these:

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



For Amiga 500+

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


For Amiga 500

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

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

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




Memory tests passed to the trapdoor memories,


Memory Test program:

https://preview.ibb.co/d2Dtsp/Memtest.jpg



Starting the test with a 512 KB trapdoor installed:

https://preview.ibb.co/mbv6Cp/512_KB_start.jpg


1.5 MB test:

https://preview.ibb.co/g4KoQ9/512_KB_End.jpg



I manufactured several of these; these memory modules are hand manufactured at my home in Spain http://www.lemonamiga.com/forum/images/smiles/icon_smile.gif 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 4€ and Intenational tracked cost 6.1 €

Payment method: Paypal


Original design post (Spanish) is:

https://www.gp32spain.com/foros/showthread.php?160981-Proyecto-La-Memorias-del-Pasado-Amiga-500-500

Its also listed on ebay, but certainly an ebay sell produce -2.1 € :(

https://www.ebay.es/itm/273213007014?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

(https://www.ebay.es/itm/273213007014?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649)

jvidia
22nd June 2018, 09:50
Can you post some pictures here please?
What memory speed are you using?
Thank you.

masteries
24th June 2018, 15:06
Can you post some pictures here please?
What memory speed are you using?
Thank you.

PM sent,

Up to seven pictures are attached in the first post, if you canīt see them, please report it.

Fastest access speed is 60 ns, but these are also suitable for Amiga 500 and 500+ refresh timing, several of these have been sent to some Amiga 500 and Amiga 500+ users with good results.

Many of the attached images come from buyers,


Thanks for the interest,

masteries
17th July 2018, 17:50
Up! There are units available!

masteries
31st July 2018, 13:20
Up! There are some units!

masteries
30th August 2018, 13:02
Updated the first post with the results of the memory test program,

masteries
3rd October 2018, 13:03
Up! There are units available!