I found that Zilog has taken down the datasheets for their old products.
Further, though I found the pinout of the various versions of the SIO, I
found no data sheet at Thomas Scherrer's Z80 Family Support page. Google
search on "Z80 SIO" yielded nothing useful. Since these parts have been out
of use for well over ten years, it's no surprise that the reference
materials are getting scarce.
Maybe we should find a place to put the complete documents, since Thomas
Scherrer's Z80 Family Support page only has the pinout.
Keep in mind, by the way, that there are actually four parts that fall under
the umberella of "Z80 SIO" and these include the DART. The SIO/0 and DART
share the same pinout/bondout, but the synchronous clocking logic in the
DART is not necessarily functional. The SIO/1 and SIO/2, though similar,
are bonded out differently, as reflected in Thomas Scherrer's Z80 Family
Support page though that doesn't tell you about the programming. Looking at
the signals that are internally tied together will shed some light on the
differring programming considerations, though the pinout doesn't tell you
everything.
I believe I still have the full-size data sheets from Zilog. Those will
probably provide the best scans if nobody else has them. The data books are
only half that size. Unfortunately, the later data sheets are only about
half-size as well. I found that no problem back in '76 or so, but nowadays,
reading the databook is always preceeded by an easter-egg-hunt for the
reading glasses.
If you're really desperate for a scan of the sheet, i.e. you need it NOW,
then email me and I'll see if I can get it done right away. (I'm in
scanning mode for the morning.)
Dick
----- Original Message -----
From: "Neil Cherry" <ncherry_at_home.net>
To: <classiccmp_at_classiccmp.org>
Sent: Friday, December 15, 2000 8:31 AM
Subject: Re: Z80 SIO programming
> Paul Williams wrote:
> >
> > Neil Cherry wrote:
> > >
> > > I've been unable to find a programing manual for the Z80 SIO. Does
> > > anyone have a link for it, the PIO and CTC? I'm begining to think
> > > the search engines are broken. I've been finding a lot less on the
> > > 'net lately.
> >
> > You're not using Google, then. The Z80 PIO datasheet can be found on
> > Thomas Scherrer's Z80 Family Support page:
> > <URL:http://www.geocities.com/SiliconValley/Peaks/3938/z80_home.htm>
> >
> > If you can't find the SIO datasheet on Zilog's site, let me know off
> > list and I will scan it for you.
>
> I used Metacrawler, which is supposed to search Google. Hmph, doesn't
> that just suck! Thanks, I now know that there is a problem with the
> search engine. BTW, Zilog doesn't have a direct SIO page but the 8430
> does appear to be close. I have to double check the pin out to be sure.
>
> Thanks!
>
> --
> Linux Home Automation Neil Cherry ncherry_at_home.net
> http://members.home.net/ncherry (Text only)
> http://meltingpot.fortunecity.com/lightsey/52 (Graphics)
> http://linuxha.sourceforge.net/ (SourceForge)
>
>
Received on Fri Dec 15 2000 - 10:07:47 GMT