Aucbvax.1610 fa.info-cpm utzoo!duke!mhtsa!eagle!ucbvax!fylstra.tsca@Sri-Unix Wed Jun 10 19:57:28 1981 suggested enhancement to MODEM206 The following may sound a little over-accomodating, but here goes... The most recent version of MODEM2 (on [mc]cpm;modem 206asm) assumes that, in the external coupler case, the transmit and receive data ports are identical, and that the TBE and RDA status bits occur on the same port. I would suggest that the most general case would be MODDATR EQU 01H ;receive data port MODDATW EQU 02H ;transmit data port MODCTLR EQU 03H ;RDA status port MODCLTW EQU 04H ;TBE status port Then the few occurances of 'OUT MODDATP' would be changed to 'OUT MODDATW'. While interfacing MODEM206.ASM to a friend's Dynabyte system, I discovered that the transmit and receive data ports were actually different! Fortunately the TBE and RDA bits occur on the same port. It is unusual, but it does happen... Dave Fylstra ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.