ZiLOG System 8000 Hardware Reference Manual page 307

HRM Z110g
HRM
SWSEG shows the
cur~ent
write buffer
add~ess
if
~o
parameter is given. If a parameter is given, th~ write
buffer segment is changed to that value.
SWOFF shows the current write buffer address if no
parameter is given. Otherwise, the write buffer offset
is changed to the parameter's value.
EXAMPLE:
SWOFF
((SWSEG 3) (SWOFF 0))
The first line does not affect the
address, but displays its current value.
write-buffer
The second line sets the write-buffer segment to
3
and
the offset to
o.
COMMAND: SLNTH Inth
DESCRIPTION:
If no parameter is given, the length of the write and
read buffers is shown in bytes.
If a parameter is given, the length of the write and
read buffers is set to its value.
EXAMPLE:
SLNTH
1024
SLNTH
-
The first line sets the read/write buffers to be
1024
bytes long. The second line shows the current
read/write buffer length, but does not change
.its
value.
COMMAND: SCYL cyl / SHEAD head / SSEC sec /
SALL cyl head sec
DESCRIPTION:
SCYL sets the current cylinder number to cyl, if the
parameter is supplied; otherwise, it shows the current
disk address.
SHEAD sets the current disk head number if the parame-
ter is supplied; otherwise, it shows the current disk
address.
A-76 Zilog
A-76