Yamaha has added a few codes for their receivers with longer codes - such as 7E 740B and 7E 750A. I am used to only 4 digit codes. How can I convert these long ones to Pronto hex? I thought the command portion was limited to values up to FF (255)? I am trying to get to long form Pronto hex to go into a Home Theater Master MX-850. Thanks.

I don't have my usual collection of data handy to check whether I've seen those before, but I'm pretty sure you are correct that Yamaha is using only command values up to FF. So most likely, the extra two digits are the part all my software calls the "subdevice" (which Yamaha usually doesn't use, but they easily could).

My best guess is the 7E is device, the 74 or 75 is subdevice and the 0B or 0A is the function.

In MakeHex, that would be
Device=126.116
or
Device=126.117
taking functions 10 and 11.

John

Thanks for the suggestions. I will give give it a try - although probably not until after Christmas. They label 7E as the Custom Code and the 740B as the Data Code, if that helpsl. Hope you survived the series of storms. Rain today is helping.

Tom from Billerica.

That contradicts my "subdevice" guess. It isn't totally impossible for 740B to be the Data Code, but it is pretty unlikely. I think it is more likely that whoever wrote the information you read didn't really understand what he was told by whoever provided the original technical information (or it might just be a typo or editing error).


Not enough to get the ice off my driveway. Probably it will freeze worse than before the rain.
Monday I made the mistake of walking from work to the mall (after trying to drive and turning back because of the traffic). After I got half way walking, none of the rest of the sidewalks were shoveled, but I was too stubborn to turn back and walked a combination of in the snow and in the street. My feet still hurt.

Are the documented codes with extra digits all codes that aren't on the original remote? Obviously some are codes not on the original remote or you wouldn't need to care. But if other documented codes with extra digits are on the original remote, we could decode them and see what they are.

John

The codes are for functions that are not on the original remote. Yamaha does a lot of these, but most of them are pretty standard codes that are easy to deal with. The documentation is direct from Yamaha - it is their posted list of extended codes for the RX-V1800. I did find a few of these long codes implemented by URC in their database for the 850, but I do not think it is easy to decode those to figure out what is inside. I think I remember you saying you had tried but were not totally successful. Since it seems like Yamaha is doing more of these long data codes, I want to try to figure them out - since URC does not implement all of them. I will send you the Yamaha file with the codes in it - so you can see what they all look like.

Sorry about the mall experience yesterday. But probably easier than driving - the traffic on 128 was backed up for miles most of the day.

I was converting codes like these yesterday from the pdf Standard IR code for RX-V861, 661, 461, 361 (NEC code) from the Yamaha Master IR Collection found here,

[Link: remotecentral.com]

You can use this to convert them,

COPY AND PASTE TO ADDRESS BAR

file:///C:/Documents%20and%20Settings/HPUser/My%20Documents/PRONTO%20IR%20CODES/YAMAHA%20MASTER%2028-09-08/Yamaha%20IR%20Library/irhex_converter.html

I was converting these codes,

FUNCTION ID1 CODE
SCENE1* 7A 007F
SCENE2* 7A 037C
SCENE3* 7A 0679
SCENE4* 7A 0976

After using the Yamaha Pronto IR Hex Converter (Address above) and paste them into Pronto Edit NG they convert to this,

FUNCTION ID1 CODE
SCENE1* 900A 006D 0000 0001 7A85 007F
SCENE2* 900A 006D 0000 0001 7A85 037C
SCENE3* 900A 006D 0000 0001 7A85 0679
SCENE4* 900A 006D 0000 0001 7A85 0976

I can`t confirm weather the codes work,I don`t have the above Receivers in front of me but I can check in a couple of days.

You can try it with your codes to see if it works!

Deleted by dtc - see next post

Thamks for the pointer to the hex converter. It really helped. It handles 8 or 16 bit device codes (custom codes in Yamaha terms) and 8 or 16 bit command codes. I have 8 bit device codes and 16 bit command codes. For 8 bit device codes it generates standard NEC1 Pronto codes for 8 bits and an 8 bit compliment, with each byte bit reversed. For 16 bit command codes it generates a 16 bit long code that is divided into 2 bytes with the bits reversed in each byte - no compliments. The lead in and lead out are fixed in the program and is the same for 8 bit or 16 bit combinations. I changed the lead in and lead out and the 0/1 values to correspond to other codes which I know work with my remote. I generated the Pronto codes and and they worked on my MX-850. Took a bit to fully understand the format, but now I should be able to handle new Yahama receiver codes as they come along.

For reference, I use

Lead in----0000 006d 0022 0002 0155 00aa
Lead Out--0016 05e6 0155 0055 0016 0e3d
Zero------0016 0016
One-------0016 003f