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hitachi.doc
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Wrap
Text File
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1992-05-06
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2KB
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45 lines
** Hitachi 9500 and 9550 players. This version UNTESTED! I couldn't find **
** anyone willing to test it! **
** Communication protocol: **
** Computer activates RTS (pin 4) on rs-232 port, (amiga 7-line handshake) **
** then sends "remote" command (68H) to switch player from local to remote **
** mode. Then send "play" command (25H) and expect back "job end" (A5H). **
** The player may take up to 15 seconds to spin up! Commands that are sent **
** may return either a "job end" code which is the original command + 80H, **
** or echo back the original command (like status ). The Hitachi players **
** don't support STATUS messages to find out if it is READY for a command. **
** ASCII digits used for frame search numbers, etc. BUT, frame numbers are **
** returned as two byte binary, high byte first, then low byte. Usual baud **
** rate is 9600. **
COMMANDS CHAR HEX DECIMAL JOB-END(hex) COMMENT
----------------------------------------------------------------------------
play-fwd % 25 37 A5 Play forward
play-rev B 42 66 C2 Play reverse
pause * 2A 42 AA
slow-fwd # 23 35 A3 Slow forward
slow-rev ( 28 40 A8 Slow reverse
still-fwd $ 24 36 A4 Still forward
still-rev ) 29 41 A9 Still reverse
fast-fwd ! 21 33 A1 Fast forward
fast-rev & 26 38 A6 Fast reverse
scan-fwd " 22 34 A2 Scan forward
scan-rev ' 27 39 A7 Scan reverse
search + 2B 43 B0
enter A 41 65 41 (echo back) Terminate groups of cmds
P. frame k 6B 107 6B (echo back) Get current frame #
reject / 2F 47 AF Park disc
(and a few others......)
SERIAL PORT CONNECTION:
computer player
-------- ------
TxD 2 2 command
RxD 3 3 data
RTS 4 4 host ready
CTS 5 5 player ready
GND 7 7 GND
-----------------------------