From: Greg King (gngking_at_erols.com)
Date: 2004-09-09 12:00:15
From: Marko Mäkelä; on Date: September 09, 2004 04:19 AM -0400 > > > But, what puzzles me: I send the bytes in blocks of 256 bytes. > > And, the last one is received with EOI = True. And, that is what > > I do not understand. > > Have you looked at the KERNAL routines? At least since the VIC-20, there > is a one-byte buffer for handling EOI. > > > ... > > B_037C jsr P_FFCC ; $037C , $FFCC > > > What tells $FFD2 to send the last byte with an acive EOI? > > The call to CLRCHN ($ffcc), I presume. To be more precise: the UNLSN function sends the last data-byte with EOI, then it sends the UNLISTEN command byte (with ATN). Message was sent through the cbm-hackers mailing list
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