ZiLOG System 8000 Hardware Reference Manual page 359

HRM 2\
LOAD
~EAD,'
WRITE; SKBF,
SKFF, EGP
SKBR, SKFR, REWIND
HEAD,WRITE
READ, WRITE
READ
READ
READ
'RE
AD, W RI T
E:,
W FM
' . READ
'READ, WRITE'
WRITE
READ, WRITE, WFM
C-2
Zilog
Tape already
logically loaded
Tape at logical end
of tape
Tape at logical
beginning of tape
DMA buffer length
greater than
or equal to 32K
bytes (k=1024
bytes)
DMA start address
and DMA length
greater than 24 bits
DMA buffer length
not even (bit 0=0)
Blank tape (more than
48 inches) encountered
Attempted .buffer
overflow during DMA
Bad read (read after
write for WRITE and
WFM) as indicated by
a bad CRCC after re-
trying the operation
the maximum permis-
sible number of times
File mark encountered
Fifo error (overflow
or underrun) after
retrying the opera-
tion the maximum
permissable number
of times
Deck stopped taking
data during write
One or more retry
attempts made
Zilog
HRM 21
CMDREJ and INAP
CMDREJ, INA?, and LEO
CMDREJ, INA?, and LBO
CMDREJ and BPARM
CMDREJ and BPARM
CMDREJ and B?ARM
DATERR and BLKTAP
OVERFL
DATERH
CMDREJ and FMDET
FFERR
INTV and HWERR
RTRYAT and number
of retries in low
byte of status 1
C-2