Date   : Fri, 13 Nov 1992 02:34:01 PST
From   : pallio.UUCP!dg@mis.ucsf.EDU (David Goodenough)
Subject: myz80 query

c.currie@CLUS1.ULCC.AC.UK (Christopher Currie) asks:
> ..... I wondered whether the emulator can use a serial port,
> whether it uses port 1 by default, and if so whether there's any
> means of making it use port 2 instead. .....

I received a message from Simeon Cran on fidonet that addressed
this issue. Polled serial I/O can be done by direct access to the
UART's at 3f8-3fe and 2f8-2fe (i.e. COM1 & COM2). These port
addresses in the 8088's I/O space map to ports 00-06 and 08-0e (or
10-16) in the Z80's I/O space. I can't remember the port addresses
for COM2, but they're there.

You'll need to know the details of how to talk to an 8250, but
there's any amount of reference material available on that
subject.

The next version (1.03) also includes BIOS/FOSSIL serial support,
although I don't have the details of that here.
     dg
---
 + SLMR 2.1a #1246 + Use the Source, Luke .....