Re: Not quite understanding this code

From: vtgearhead <snhirsch_at_gmail.com>
Date: Mon, 2 Nov 2020 15:19:01 -0600 (CST)
Message-ID: <1604351941617-0.post_at_n4.nabble.com>
smf wrote
> What offset? The index?
> 
> BUFFER-POINTER    B-P channel index    Set r/w pointer within buffer
> 
> It's 0, so the start of the buffer. I think you can just set the index
> anywhere and write a single byte if you want.
> 
> The 7 at the end is the length of the command

Sound of palm hitting forehead.  I totally misread the statement... Too much
bouncing between dissimilar vintage machines and languages.  Thanks for
keeping me honest.

So, the bigger question is:  Why does a write of the D64 file back to a
diskette have a difference in only one small region?  Does the 4040 drive
re-write any of the housekeeping areas on close of the direct-command
channel?  The target seems to end up with its original volume name even
though I'd expected the copy operation to overwrite it.  



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Received on 2020-11-02 23:01:12

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