Sony BVH-2000, Operation And Maintenance Manual

Page: 322 / 505

(5-6-9. System Control/TC Board Interface)
A3FFH) is composed of 64 counters, and to each counter is
allotted a number from OOHto 3FH. Four bytes are allotted to
each counter.
Counter numbers are allotted corresponding
to the data used,
and
TMCO through TMC3 are bits which command the presetting.
bit-Z is read the
counter area below in the common memory, and the counter
numbers which have read the preset values are stored in
TMCO+ 1 TMC3+ 1.
The timing of the presetting using the CPU on the SY-80 board
is
is performed in an interval of several milliseconds
in the order
of TIME CODE, BIT. TIMER-l and TIMER-2.
A390H-A393H: TIMER-l PRESET
A394H-A397H: TIMER-2 PRESET DATA (25H)
A39CH-A39FH: USER~S BIT PRESET DATA (27H)
The preset data read into the common
the SY-80 CPU and written into the time code board with the
CF ON: This specifies color framing lock
DF ON: This specifies the
frame.
CG BLK (Character Generator
This specifies black for the whole screen.
000: TC READER
010: TC USER'S BIT READER
011: TIHER-2
101: TC GENERATOR
110: VITC USER'S BIT READER
T
BVH-2000(U/C)/PS/PM
B VH-2180(
U /C) IPS/PM
Read
The TIMER-I. TIMER-2. USER'S BIT, TIME CODE and
through F306H) on the time .code board with addresses F300H
are stored in the
counter area (A300H through A3FFH) of the common memory.
of the read out, based on the SY-80 CPU. is started
have from
t-ha·
'CT~<rt1"'~
I
the data, which have been read out, are converted into display
(A090H through A09FH) of the common memory.
addresses A090H (3 of the timer
area are the 3-character codes (TMI. TM2, TCR, UBR,
TCR .. UBR., TCG, UBG) of the eight types of data indicated as
data are read out from VITC to TC and UB, the VITC mark (.)
character of
the title for differentiation.
TIMER DISPLAY
ADDRESS
BITS
The display data stored in the common memory are returnd to
the
~.L'JlJl'"
,.,'J' ....
"v
Lf'lfL< ......
<.le ...... "
character code memory on the time code board.
5-6-1 SYSTEM CONTROL SYSTEM
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