JP1 Remotes Forum Index JP1 Remotes

FAQFAQ SearchSearch 7 days of topics7 Days MemberlistMemberlist UsergroupsUsergroups RegisterRegister
ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

GI 4DTV - update proposal
Goto page Previous  1, 2, 3
Post new topic   Reply to topic    JP1 Remotes Forum Index -> JP1 - Software
View previous topic :: View next topic  
Author Message

Joined: 19 May 2009
Posts: 3261

PostPosted: Sun Feb 09, 2020 7:35 pm    Post subject: Reply with quote

I don't remember well what i had for dinner last Thursday, so I'll have to guess about finding the Hamming code. I think I bothered to try to classify the scheme because (I suppose) had found out that unit numbers ran up to 7, and that didn't fit into what we already knew. It was pretty clear that the 4DTV protocol is likely to be better than a simple parity bit for detecting errors. Any web search for error correcting codes brings up Hamming as a possibility, especially where the error correction is to be done on a short block of data. To my eye the 4DTV scheme looks very much like Hamming even though the actual bit numbers are different.

I agree that we don't want a blanket prohibition on hacked executors, but I notice that a memory improvement is not always realized by using 1 byte of variable data. If I counted right the 00A4 hacked S3C80 executor uses 26 more bytes than the official one, and needs 4 fixed data bytes. So an upgrade needs at least 30 functions before the hacked 00A4 executor takes less space.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic       JP1 Remotes Forum Index -> JP1 - Software All times are GMT - 5 Hours
Goto page Previous  1, 2, 3
Page 3 of 3

Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group
Get Smart! the band's official homepage Rockabilly Central