ZiLOG System 8000 Hardware Reference Manual page 310

HRM
EXAMPLE:
WCMD 47H
Zilog
HRM
Writes 47 (hexadecimal) to the command port. This
corresponds to CR:CMD
=
7 (set interrupt vector) and
CR:DATA
=
4. This instructs the controller to use
interrupt vector 4.
COMMAND: WRITE
WR
DESCRIPTION:
wseg woff Inth cyl head sec
wseg woff Inth cyl head sec
Issues the WRITE packet command. The write buffer
begins at <wseg>woff. The disk address written to is:
cyl, head, sec. Inth bytes are written.
WR is a special abbreviation of WRITE.
EXAMPLE:
WRITE 2 0 512 10 0 2
Writes 512 bytes from memory beginning at <2>0 into
cyl# 10, head# 0, sector# 2.
COMMAND: WLONG wseg WQff Inth cyl head sec
DESCRIPTION:
Issues the WLONG (write long) packet command. The
write buffer begins at <wseg>woff. The disk address
that is written to is: cyl, head, sec. Inth is the
number of data bytes to be written.
EXAMPLE:
WLONG 2 0 516 550 7
°
Writes 512 data bytes plus 4 checksum bytes from memory
at <2>0 into cyl# 550, head# 7, sector#
o.
A-79
Zilog
A-79