English Amiga Board

Go Back   English Amiga Board > Misc > MarketPlace

Thread Tools
Old 20 November 2020, 12:30   #1
Registered User

masteries's Avatar
Join Date: Oct 2020
Location: Madrid
Age: 37
Posts: 41
Lightbulb For sale: New manufactured Amiga 500 trapdoor memory expansion


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:








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:

masteries is offline  
Old 07 January 2021, 12:50   #2
Registered User

masteries's Avatar
Join Date: Oct 2020
Location: Madrid
Age: 37
Posts: 41
Up! There are units available!
masteries is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
A500 512kb memory ram trapdoor expansion new from amiga kit amigakit.com MarketPlace 8 02 January 2020 11:24
WANTED - a simple 512Kb RAM trapdoor memory expansion for Amiga 500 Marty_McFly MarketPlace 1 23 November 2019 12:08
Amiga 500 trapdoor clock only: is it possible? ref support.Hardware 5 04 April 2019 10:24
Help with power computing amiga 500 trapdoor ram expansion MoreBITS support.Hardware 3 10 March 2017 15:25
WTB: Amiga 500 Expansion Card Trapdoor sorfri2 MarketPlace 3 03 January 2013 10:02

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +2. The time now is 17:34.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Page generated in 0.08593 seconds with 13 queries