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S3C8 ASM expert question on modifing RAM

 
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ngtw16a



Joined: 05 Oct 2016
Posts: 8

PostPosted: Wed Jan 11, 2017 11:18 am    Post subject: S3C8 ASM expert question on modifing RAM Reply with quote

Hello.
I'm an IT guy...trying to remember my assembler...its been AWHILE for me.

I'm tinkering with some custom extender logic, and wasn't sure about
how to modify the ram within the code.

so, the way I understand it...the protocol code is copied from EEPROM
into RAM at address FF00 (for a 15-2116).

Is this ram built INTO the CPU or is it external? (maybe in the EEPROM chip?) The processor specs didn't seem to mention any ram at FF00 ?

I'm trying to modify a few bytes...and looking at using the LDC command.
but wasn't sure if it was internal or external (LDC -vs- LDE)

example would be: LDC FF10H,RC0

I'm sure someone has done this before...but didn't see any LDC, LDE in
the 15-2116 extender's code.


:Pat
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vickyg2003
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Joined: 20 Mar 2004
Posts: 6484
Location: Florida

PostPosted: Thu Jan 12, 2017 11:41 pm    Post subject: Re: S3C8 ASM expert question on modifing RAM Reply with quote

ngtw16a wrote:
Hello.
I'm an IT guy...trying to remember my assembler...its been AWHILE for me.

I'm tinkering with some custom extender logic, and wasn't sure about
how to modify the ram within the code.

Humbling isn't it. Laughing EEPROM extenders are very difficult to write.

You might find this thread of interest.
http://www.hifi-remote.com/forums/viewtopic.php?t=7637

I don't have a clue as to where the RAM is, although I know it is not in the EEPROM. Once I finished with the Cinema 7, I moved on to the JP1.2 Flash remotes which were much easier to extend.

I moved this thread to the extender forum.
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