Table
8-8:
DSKBYTR Register
Bit
Number
Name
Function
15
BYTEREADY
Indicates
that
this register contains
a valid byte of
data
(reset by
reading this register).
14
DMAON
The
DMA
bit
(in
DSKLEN) is enabled
and the DMACON bits are on, too. All
DMA bits must be on for this
to
be
true.
13
DISKWRITE
This disk write bit
(in
DSKLEN)
is
enabled.
12
WORDEQUAL Indicates the DISKSYNC register equals the
disk input stream. This bit
is
true only
while the input stream matches the sync
register (as little as two microseconds).
11-8 Unused
7-0 DATA
Disk byte data.
ADKCON
and
ADKCONR
-
Audio
and
Disk
Control
Register
ADKCON
is
the write address and ADKCONR is the read address for this register. The
bottom eight bits of the register are used for the audio circuitry. The other bits are
shown in table 8-9.
Interface Hardware
233