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- ** 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
- -----------------------------
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