Path: utzoo!utgpu!attcan!uunet!ncrlnk!ncrcae!hubcap!gatech!purdue!haven!uflorida!ukma!tut.cis.ohio-state.edu!mailrus!cornell!batcomputer!itsgw!leah!bingvaxu!sunybcs!ugfelong
From: ugfelong@cs.Buffalo.EDU (Edward Felong)
Newsgroups: comp.sys.apple
Subject: Re: Configuring Serial Ports ...
Keywords: help
Message-ID: <2569@cs.Buffalo.EDU>
Date: 10 Nov 88 04:34:14 GMT
References: <2340@cs.Buffalo.EDU> <257@greens.UUCP>
Reply-To: ugfelong@sunybcs.UUCP (Edward Felong)
Organization: SUNY/Buffalo Computer Science
Lines: 85

In article <257@greens.UUCP> matthew@sunpix.UUCP ( Sun NCAA) writes:
>In article <2340@cs.Buffalo.EDU>, ugfelong@cs.Buffalo.EDU (Edward Felong) writes:
>> 
>> What exactly happens when the serial ports are configured ?
>> 
>The serial port configurations are stored in auxilary memory as follows:

[much deleted ...]

>to capture these values using machine language do the following:
>	LDA	#$04
>	STA	$3D	#SET SOURCE START HIGH
>	STA	$3F	#SET SOURCE END HIGH
>	LDA	#$78
>	STA	$3C	#SET SOURCE START LOW
>	LDA	#$7F
>	STA 	$3D	#SET SOURCE END LOW
		^^^
should be	$3E


>	LDA	#$03
>	STA	$43	#SET DESTINATION HIGH
>	LDA	#$00
>	STA	$42	#SET DESTINATION LOW
>	SEC		#FLAG A MOVE FROM AUX MEMORY
	^^^
	CLC  moved bytes FROM AUX


>	JSR	$C311	#DO THE ACTUAL MOVE
>	RTS		#MAIN MEMORY $0300-$0307 NOW HAVE VALUES
>
>and this to set all of them:
>	LDA	#$03
>	STA	$3D	#SET SOURCE START HIGH
>	STA	$3F	#SET SOURCE END HIGH
>	LDA	#$00
>	STA	$3C	#SET SOURCE START LOW
>	LDA	#$07
>	STA 	$3D	#SET SOURCE END LOW
                ^^^
should be       $3E

>	LDA	#$04
>	STA	$43	#SET DESTINATION HIGH
>	LDA	#$78
>	STA	$42	#SET DESTINATION LOW
>	CLC		#FLAG A MOVE TO AUX MEMORY
	^^^
	SEC  moved bytes TO AUX


>	JSR	$C311	#DO THE ACTUAL MOVE
>	RTS		#AUX MEMORY $0478-$047F NOW HAS 
>			#MAIN MEMORY $0300-$0307  VALUES




>Matthew Lee Stier     (919) 469-8300|
>Sun Microsystems ---  RTP, NC  27560|          "Wisconsin   Escapee"
>uucp: {sun, rti}!sunpix!matthew     |




I got the printer to work fine with the changes I indicated.
Could someone recommend some reference material for what the
"Applesoft BASIC Programmer's Reference Manual" lists as:

	$C000   $CFFF   Hardware I/O addresses

Just getting the "ProDos Techincal Reference Manual" from the
dealer I bought my //c from was like pulling teeth, and I haven't
seen any ads for books in any magazines.

Please e-mail since this appears to be of NO interest to anyone else
in this newsgroup.  (wouldn't want to get in the way of those GS articles :)


                                               Ed Felong


   'ugfelong@cs.buffalo.EDU'  or maybe 'v095gzmx@sunybcs.BITNET'