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builderpages:speed3ple:ecb-ramfloppy [2025/03/15 06:49] – Revision from 2025-03-15 builderpages:speed3ple:ecb-ramfloppy [2026/06/15 13:21] (current) – external edit 127.0.0.1
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 +/* Imported from Wayback Machine
 +   Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:speed3ple:ecb-ramfloppy
 +   Snapshot date: 2025-12-08
 +   Generator    : wayback-archiver
 +*/
 +
 +====== ECB RamFloppy board: ======
 +
 +This is the R11 version.
 +
 +Built with 8 x AS6C4008-55 and a mix of HC, AHCT and LS logic.
 +
 +Lesson learned: If You try to use 2 RamFloppy boards at the same time, pay attention to current draw from the power supply. My first power supply could not keep up; 5volt was down to 4,45volt and there was trouble booting system.
 +
 +I used a SMD version of the TLC7705D on a small adapter board. Seems to work.
 +
 +Good read/write speeds!
 +
 +^Text                       ^Images                                                                                                                                                                             ^
 +|ECB-RamFloppy pcb completed|{{[[lib:plugins:ckgedit:fckeditor:userfiles:image:builderpages:speed3ple:images:img_20200327_235424small.jpg]] completed PCB}}|
 +|ECB-RamFloppy in use                                                                                                                                                                                         |
 +
 +\\
  
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