rconn%brl@sri-unix.UUCP (06/19/83)
From: Rick Conn <rconn@brl>
AR84:CPM contains a new version of SYSIO (my redirectable I/O
package under ZCPR2). This file, called SYSIO 2ASM, is source
for a redirectable I/O package which gives the user seven con-
soles and five printers under ZCPR2. It gives the general ZCPR2
user a fairly good example of how to implement a redirectable I/O
package under ZCPR2 so that DEVICE, IOLOADER, and RECORD can in-
teract with it.
This package defines the following physical devices:
Consoles --
TTY Printing Terminal
CRT CRT Display
CRTMOD CRT and Modem in Parallel
CRTREM CRT Input and CRT/Remote Computer Output
CRTMOD2 CRT Input and CRT/Modem Output
CRTTY CRT Input and CRT/TTY Output
CRTNEC CRT Input and CRT/NEC Spinwriter Output
Readers and Punches --
MODEM Modem
CLOCK DC Hayes Chronograph
List Devices --
TTY Printing Terminal
CRT CRT Display
NEC NEC Spinwriter Output
MODEM Modem
REMOTE Remote Computer
In interacting with DEVICE, the user need no longer concern him-
self with the arbitrary physical device names associated with
STAT. DEVICE allows the user to find out the names of the physi-
cal devices he has available and to assign them mnemonically as
he wishes. For instance, the following commands are valid:
DEVICE Display All
-- Display the names of all physical devices
DEVICE Console=CRT,List=NEC
-- Assigns the CRT to the console and the NEC
Spinwriter to the List Device
DEVICE //
-- Displays built-in documentation
DEVICE is also documented in the ZCPR2 literature.
Enjoy!
Rick
P.S. Ron Fowler's MLOAD is useful in creating SYSIO.IO.