Advanced Micro Computers Am96/4016 User Manual page 41

TABiLE 3-2. MONITOR I/O CONTROL BLOCK
Word
1
2
3
4
Byte
High
Low
High
Low
High
Low
High
Low
Contents
Function Code
1
=
Read from console
2
=
Write to console
3
=
Write line printer
4
=
Open disk file
5
=
Close disk file
6
=
Created disk file
7
=
Read disk sector
8
=
Write disk sector
o
=
Read Control statement
No entry. Response code is stored
here after I/O.
Address at which the file name
is stored.
Beginning address of data to
be written or read. Data
written must include any
necessary carriage return,
line feeds etc. Data read
wi
11
inc
1
ude t hem a
1
so •
Length in number of bytes.
It indicates either the total
number of bytes to be writ-
ten, or the maximum number of
bytes to be read. The total
number of bytes read up to
and including the carriage
return is stored here upon
return to user program.
3-9