NEC XM37 - Manual (Page 27)

9
Command Communication Sequence
When external equipment such as a personal computer gives the command to
the XP37 Plus/XM37 Plus, the XP37 Plus/XM37 Plus returns an ACK. So
make sure that the external equipment receives this ACK.
The XP37 Plus/XM37 Plus returns an ACK if it has received the command
correctly.
If it has not received the command correctly due to data error, it will return
nothing. Therefore, when the external equipment send a command, make
sure that it received the ACK.
44
43
Command sending/receiving sequence
External equipment
(PC)
XP37 Plus/XM37 Plus
Command
ACK
XP37 Plus/XM37 Plus → PC
Example: Input switching (VIDEO 1) from the PC to the XP37 Plus/XM37
Plus(when the address selector equals 0)
PC → XP37 Plus/XM37 Plus
XP37 Plus/XM37 Plus
→
PC
COM1
9F
Contents
Power On
Power Off
Degauss Control
Length
00
00
00
COM2
4E
4F
A1
COM1
3F
7F
Contents
Power On (ACK)
Power Off (ACK)
Input Switching (ACK)
Degauss Control(ACK)
Length
00
00
00
01
COM2
4E
4F
B0
A1
PC CONTROL COMMAND LIST FOR USE WITH THE XP37 Plus/XM37 Plus
PC → XP37 Plus/XM37 Plus
COM1
DF
UA
80
COM2
B0
Length
02
Data 1
00
Data 2
VIDEO1 : 01
VIDEO2 : 02
RGB1 : 03
RGB2 : 04
Sum
12
13
14
15
COM1
3F
UA
80
COM2
B0
Length
00
Data 1
6F