Sharp mz-3500 Manual For Use page 279

Section B:
Hardware interface
************************************************************************
* *
*
*
5 -
Print Character
*
*
************************************************************************
On entry:
c =
Character
On exit :
The character passed in register C is sent to all devices mapped via the
LSTOUT: bit vector to the printer. The character is not masked or con-
verted anyway. The system waits until all devices affected have accepted
the character.
If a device is not ready to receive a character, the system waits until
the timeout interval (definable by EOS function 73) has elapsed. Then,
an error message is displayed on the screen denoting the faulty device.
If at this moment hardware function 2 returns a non-zero value, the
character pending is read and output will be aborted, i.e. a system
restart is performed. Otherwise, the wait cycle repeats.
Output device
~.
however, is not subjected to timeouts,
defined as monitor screen under EOS.
Example: Send a form feed to the printer
LD c,s~ EOS function code
LD DE,PARAMS Parameters
CALL
5 Call EOS
PARAMS:
DB 5 Hardware function
DB
0
because it is
No.
ow
0CH character in
register
c
ow
0
ow
0
EOS System manual Daeumling & Zimmermann
Page 141