Article 403 of comp.sys.apple2.programmer:
Newsgroups: comp.sys.apple2.programmer
Path: caen!uwm.edu!cs.utexas.edu!uunet!tarpit!bilver!vicstoy!aphelps
From: aphelps@vicstoy.UUCP (Austin Phelps)
Subject: Re: SSC info wanted (again)
Message-ID: <1993Jul17.170858.2473@vicstoy.UUCP>
Organization: vicstoy public access Unix, Orlando, FL
References: <199307152147.AA18084@ghostwheel.bga.com>
Date: Sat, 17 Jul 1993 17:08:58 GMT
Lines: 41

In article <199307152147.AA18084@ghostwheel.bga.com> khym@ghostwheel.bga.com (Dave Huang) writes:
>I was wondering, what do $C088 + n0 through $C08B + n0 on a Super
>Serial Card do?


Address   Register Bits Interpretation
$C081+n0  DIPSW1   0    SW1-6 is OFF when 1, ON when 0
          (SW1-x)  1    SW1-5 is OFF when 1, ON when 0
                   4-7  Same as above for SW1-4 through SW1-1
$C082+n0  DIPSW2   0    Clear to Send (CTS) is true when 0
          (SW2-x)  1-3  Same as above for SW2-5 through SW2-3
                   5,7  Same as above for SW2-2 and SW2-1
$C088+n0  TDREG    0-7  ACIA transmit register (write)
          RDREG    0-7  ACIA receive register (read)
$C089+n0  STATUS        ACIA status/reset register
		   0	Parity error detected when 1
		   1	Framing error detected when 1
		   2	Overrun detected when 1
		   3	ACIA receive register full when 1
		   4	ACIA transmit register empt when 1
		   5    Data Carrier Detect (DCD) true when 0
		   6	Data Set Ready (DSR) true when 0
		   7	IRQ has occured when 1
$C08A+n0   COMMAND	ACIA Command register (r/w)
		   0	DTR - enable (1) or disable (0) receiver and all IRQ
		   1	When 1 allow STATUS bit 3 to cause IRQ
		   2-3	Control transmit interrupt, RTS level and transmitter
		   4	0=normal mode for receiver, 1=echo mode-bit2,3 must be 0
		   5-7	Control Parity
$C08B+n0   Control	ACIA control register (r/w)
		   0-3	baud rate $00=16 x external clock
		   4	1=use baud rate generator; 0=use external clock (ns)
		   5-6	# of data bits
		   7	# of stop bits


-- 
  Austin Phelps - aphelps@vicstoy.oau.org -or- tf3@delphi.com 
           UUCP - {peora,ge-dab,tous,tarpit}!bilver!vicstoy!aphelps
                - vicstoy Public Access Unix, Orlando FL
                - (407)299-3661  1200/2400/9600 V.32  24 hours  8N1


