Sony MDS-E12 - 4-2. Precautions for Adjustments; Replacement Parts; 4-3. Creating Continuously-Recorded Disc; 4-4. Check Prior to Repairs

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8 Command quick reference
RS-232C Protocol for MDS-E12/11/52
1 Transmission format
Transmission forma 9600bps
Character length 8 bit
Parity check no parity
Stop bit number 1 bit
Variable length byte communication data
(1 byte: header to last byte: terminator (FFH))
Contents of data 00H to FFH (00 to 255)
2.1 Header
1st byte header (communication direction)
7EH from PC to MDS
6FH from MDS to PC
2.3 Data length
2nd byte data length
05H to 20H the number of data bytes from header to terminator
2.4 Format type
3rd byte format type: 05H
2.5 Category
4th byte category MD: 47H
2.6 Terminator
Data from header is completed at the terminator (FFH).
In case of decode, be sure to check data length against the terminator.