Technical documentation

This page contains a collection of (links to) HD24-related files and technical documentation. No guarantees are made about their accuracy or relevance.

Resources

File Description
Alesis.com
HD24 page on Alesis' website. Docs & Downloads section is recommended.
Alesis_ADAT_HD24
Wikipedia entry on the HD24
ADAT project
Description and FPGA implementation of the ADAT lightpipe. Note that like the ADAT sync pinout, the actual live implementation differs from the patent description.
alesisbrcsysex.asp
Description of SysEx information supported by Alesis BRC
lrc.txt
Plain ASCII textfile containing the reverse-engineered schematic of the Little Remote Control (LRC)
Wavefront AL1402G OptoRec Data Sheet.pdf
Data sheet of ADAT optical decoder IC
Wavefront AL1401AG OptoGen Data Sheet.pdf
Data sheet of ADAT optical encoder IC
Adat_sync_pinout.txt
ADAT sync 9-pin connector pinout
US5541781_Synchronization_of_recordings.pdf
PDF containing patent text of ADAT sync connector. Note that the correct pinout differs from this patent description.
ADATFS.txt
Reverse engineered spec of the FST file system used by the HD24.
bdm.html
Pinout of motorola 26-pin bdm debugging interface used on HD24 mainboard
HD24 remote control software
This page describes how to hook up the ADAT sync port to allow controlling ADATs through software.