Date   : Wed, 10 Jun 1981 19:06:00-PDT
From   : fylstra.tsca at Sri-Unix
Subject: 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