Re: User Port and AutoRun Addresses

From: Larry Anderson (foxnhare_at_jps.net)
Date: 2001-02-02 07:35:30

Here is a page I have not debugged yet talking about the PET/VIC-20/64
and Plus/4 data I/O port and their pinouts (in relation to the flash
attack cable)  You can get tested addresses and pinouts there my ML
segment needs work though.  The Plus/4 is kinda strange in its configuration...

http://www.jps.net/foxnhare/projects/facable.html

Nick Coplin wrote:
> 
> Hello All,
> 
> Lacking a programmer's reference guide for all but the C64, I need some address info about the C128 and C16/Plus4
> 
> C16/Plus4:
> What address is the userport at and the DDR for it?
> What is the pinout of the userport regarding datalines only, is it C64/V20 compatible?
> Where is the input buffer (loc512 on the C64/Vic20)?
> Where to I load in order to initiate a vector based autorun function (ie I normally use the CHROUT vector/tape buffer on a C64)?
> Where are BASIC start /end text pointers?
> 
> C128:
> (I guess some aspects of BASIC 3.5 are the same as BASIC 7.0)
> The above questions plus...
> What is some simple code to bank I/O in and out of processor space?
> 
> Many thanks in advance.
> 
> - Nick
> 
> Get your small business started at Lycos Small Business at http://www.lycos.com/business/mail.html
> -
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