ZiLOG System 8000 - Page 301

HRM
IROFF 512
IWOFF
Zilog
HRM
The first line increments the read buffer offset by 512
bytes. The second line increments the write buffer
offset, also by 512, because the last value assigned to
affine was 512.
COMMAND: INIT
DESCRIPTION:
Reinitializes the controller. The sequence of events
1
·
'" •
.;) .
1) Write CR:INIT to the command port. Wait for SR:BZ
to clear.
2) Reinitialize all packets to zeroes.
3) Reinitialize the dispatch table
4) Send the segment number and offset bytes for the
dispatch table to the controller.
5) Send the interrupt vector" in intvec to the con-
trollE~r .
6) Send the read-packet-addresses command to the con-
troller.
EXAMPLE:
. INIT
COMMAND: NOP / PRISEL / PRIREL / RESET / SELECT
DESCRIPTION:
Each of these commands issues the packet command of the
same name in the current unit packet. SMDFMT waits for
command completion and reports any error status
returned by the SMD controller.
EXAMPLE:
NOP
RESET
SELECT
COMMAND: PUTMEM
P
DESCRIPTION:
A-70
putval putseg putoff
putval putseg putoff
Zilog
A-70