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ZiLOG System 8000 Hardware Reference Manual

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HRM
Zilog
HRM
REGISTER
ADDRESS
xxOA
xxOB
xxOC
xXOD
xxOE
xxOF
xx10
NAME
Transfer
Address
Bits
7
to
0
Transfer
Address,
Bits
15
to
8
Transfer
Address
Reserved
Reserved
Reserved
Command-Status
(CIS)
Reglster
DEFINITION
This
register
contains
the
loworder
byte
of
the
3-byte
transfer
address.
The
transfer
address
is
the
location
of
the
first
word
of
a
block
of
memory
allocated
for
the
transfer.
Data
can
be
leaving
memory
or
coming
to
it.
The command
from
the
CPU
determinis
the
direction
of
transfer.
The Read
Sector
command
moves
data
from
disk
to
main
memory.
The
Write
Sector
command
moves
data
from
main
memory
to
disk.
The
CPU
stores
the
intermediate
byte
of
the
transfer
address
in
this
register.
The
CPU
stores
the
high-order
byte
of
the
transfer
address
in
this
register.
For
transfer
address
bits
32
to
24.
4-23
Zilog
4-23

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ZiLOG System 8000 Specifications

General IconGeneral
BrandZiLOG
ModelSystem 8000
CategoryDesktop
LanguageEnglish

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